ISLAB/CAISR - User contributions [en]

Publications:A processor array module for distributed, massively parallel, embedded computing

2014-06-13T13:36:36Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Lars Bengtsson, Kenneth Nilsson, Bertil Svensson |PID=539173 |Name=Bengtsso..."

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{{PublicationSetupTemplate|Author=Lars Bengtsson, Kenneth Nilsson, Bertil Svensson
|PID=539173
|Name=Bengtsson, Lars [larb] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Nilsson, Kenneth [kn] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Svensson, Bertil [bertil] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]) (Department of Computer Engineering, Chalmers University of Technology, Göteborg, Sweden)
|Title=A processor array module for distributed, massively parallel, embedded computing
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=Microprocessing and Microprogramming
|JournalISSN=0165-6074
|Status=published
|Volume=38
|Issue=1-5
|HostPublication=
|Conference=19th Symposium on Microprocessing and Microprogramming (EUROMICRO 93), Barcelona, Spain, Sep. 06-09, 1993
|StartPage=529
|EndPage=537
|Year=1993
|Edition=
|Pages=
|City=Amsterdam
|Publisher=Elsevier
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|DOI=http://dx.doi.org/10.1016/0165-6074(93)90192-N
|ISI=A1993LT48300079
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|ScopusId=2-s2.0-0027656359
|NBN=urn:nbn:se:hh:diva-18833
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|Keywords=Parallel Processing;Distributed Embedded Systems;Massive Parallelism;Learning Systems;Real-time Computer Systems;Optical Communication
|Categories=Teknik och teknologier (2)
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|Abstract=<p>With the increased degree of miniaturization resulting from the use of modem VLSI technology and the high communication bandwidth available through optical connections, it is now possible to build massively parallel computers based on distributed modules which can be embedded in advanced industrial products. Examples of such future possibilities are ''action-oriented systems'', in which a network of highly parallel modules perform a multitude of tasks related to perception, cognition, and action. The paper discusses questions of architecture on the level of modules and inter-module communication and gives concrete architectural solutions which meet the demands of typical, advanced industrial real-time applications. The interface between the processors arrays and the all-optical communication network is described in some detail. Implementation issues specifically related to the demand for miniaturization are discussed.</p>
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|CreatedDate=2012-06-25
|PublicationDate=2012-07-03
|LastUpdated=2014-05-22
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Publications:A Ground Truth for Iris Segmentation

2014-06-13T13:36:31Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Heinz Hofbauer, Fernando Alonso-Fernandez, Peter Wild, Josef Bigun, Andreas..."

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{{PublicationSetupTemplate|Author=Heinz Hofbauer, Fernando Alonso-Fernandez, Peter Wild, Josef Bigun, Andreas Uhl
|PID=710627
|Name=Hofbauer, Heinz (Department of Computer Sciences, University of Salzburg, Salzburg, Austria) (Multimedia Signal Processing and Security Lab);Alonso-Fernandez, Fernando [feralo] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650]);Wild, Peter (Department of Computer Sciences, University of Salzburg, Salzburg, Austria) (Multimedia Signal Processing and Security Lab);Bigun, Josef [josef] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650]);Uhl, Andreas (Department of Computer Sciences, University of Salzburg, Salzburg, Austria) (Multimedia Signal Processing and Security Lab)
|Title=A Ground Truth for Iris Segmentation
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
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|Conference=22nd International Conference on Pattern Recognition, ICPR, Stockholm, Sweden, August 24-28, 2014
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|Year=2014
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|NBN=urn:nbn:se:hh:diva-24992
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|Categories=Signalbehandling (20205)
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|Abstract=<p>Classical iris biometric systems assume ideal environmental conditions and cooperative users for image acquisition. When conditions are less ideal or users are uncooperative or unaware of their biometrics being taken the image acquisition quality suffers. This makes it harder for iris localization and segmentation algorithms to properly segment the acquired image into iris and non-iris parts. Segmentation is a critical part in iris recognition systems, since errors in this initial stage are propagated to subsequent processing stages. Therefore, the performance of iris segmentation algorithms is paramount to the performance of the overall system. In order to properly evaluate and develop iris segmentation algorithm, especially under difficult conditions like off angle and significant occlusions or bad lighting, it is beneficial to directly assess the segmentation algorithm. Currently, when evaluating the performance of iris segmentation algorithms this is mostly done by utilizing the recognition rate, and consequently the overall performance of the biometric system. In order to streamline the development and assessment of iris segmentation algorithms with the dependence on the whole biometric system we have generated a iris segmentation ground truth database. We will show a method for evaluating iris segmentation performance base on this ground truth database and give examples of how to identify problematic cases in order to further analyse the segmentation algorithms. ©2014 IEEE.</p>
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|PublicationDate=2014-04-07
|LastUpdated=2014-05-27
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Publications:Quality Measures in Biometric Systems

2014-06-13T13:36:23Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Fernando Alonso-Fernandez, Julian Fierrez, Josef Bigun |PID=623099 |Name=Al..."

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{{PublicationSetupTemplate|Author=Fernando Alonso-Fernandez, Julian Fierrez, Josef Bigun
|PID=623099
|Name=Alonso-Fernandez, Fernando [feralo] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Laboratoriet för intelligenta system [6703]);Fierrez, Julian (Universidad Autonoma de Madrid, Madrid, Spain) (ATVS/Biometric Recognition Group);Bigun, Josef [josef] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650])
|Title=Quality Measures in Biometric Systems
|PublicationType=Book Chapter
|ContentType=Refereegranskat
|Language=eng
|Journal=
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|HostPublication=Encyclopedia of Biometrics
|Conference=
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|Year=2014
|Edition=2
|Pages=
|City=New York
|Publisher=Springer
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|NBN=urn:nbn:se:hh:diva-22337
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|Categories=Signalbehandling (20205)
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Publications:A Database-Centric Architecture for Home-Based Health Monitoring

2014-06-13T13:36:22Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Wagner Ourique de Morais, Jens Lundström, Nicholas Wickström |PID=711609 ..."

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{{PublicationSetupTemplate|Author=Wagner Ourique de Morais, Jens Lundström, Nicholas Wickström
|PID=711609
|Name=Ourique de Morais, Wagner [wagdem] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Inbyggda system (CERES) [3939]);Lundström, Jens [jenlun] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650]);Wickström, Nicholas [nicholas] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650])
|Title=A Database-Centric Architecture for Home-Based Health Monitoring
|PublicationType=Book Chapter
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=8277
|Issue=
|HostPublication=Ambient Assisted Living and Active Aging : 5th International Work-Conference, IWAAL 2013, Carrillo, Costa Rica, December 2-6, 2013, Proceedings
|Conference=
|StartPage=26
|EndPage=34
|Year=2013
|Edition=
|Pages=
|City=Heidelberg, Germany
|Publisher=Springer
|Series=Lecture Notes in Computer Science ; Vol. 8277
|SeriesISSN=0302-9743
|ISBN=978-3-319-03091-3;978-3-319-03092-0
|Urls=http://dx.doi.org/10.1007/978-3-319-03092-0_4
|ISRN=
|DOI=http://dx.doi.org/10.1007/978-3-319-03092-0_4
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|ScopusId=2-s2.0-84893927504
|NBN=urn:nbn:se:hh:diva-25012
|LocalId=
|ArchiveNumber=
|Keywords=Healthcare technology;ambient assisted living;active data-bases;in-database processing;machine learning
|Categories=Elektroteknik och elektronik (202)
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|Abstract=<p>Traditionally, database management systems (DBMSs) have been employed exclusively for data management in infrastructures supporting Ambient Assisted Living (AAL) systems. However, DBMSs provide other mechanisms, such as for security, dependability, and extensibility that can facilitate the development, use, and maintenance of AAL applications. This work utilizes such mechanisms, particularly extensibility, and proposes a database-centric architecture to support home-based healthcare applications. An active database is used to monitor and respond to events taking place in the home, such as bed-exits. In-database data mining methods are applied to model early night behaviors of people living alone. Encapsulating the processing into the DBMS avoids transferring and processing sensitive data outside of database, enables changes in the logic to be managed on-the-fly, and reduces code duplication. As a result, such an approach leads to better performance and increased security and privacy, and can facilitate the adaptability and scalability of AAL systems. An evaluation of the architecture with datasets collected in real homes demonstrated the feasibility and flexibility of the approach.</p>
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|CreatedDate=2014-04-10
|PublicationDate=2014-04-10
|LastUpdated=2014-04-24
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Publications:Situation Awareness in Colour Printing and Beyond

2014-06-13T13:36:21Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Jens Lundström |PID=716365 |Name=Lundström, Jens [jenlun] (Högskolan i H..."

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{{PublicationSetupTemplate|Author=Jens Lundström
|PID=716365
|Name=Lundström, Jens [jenlun] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650])
|Title=Situation Awareness in Colour Printing and Beyond
|PublicationType=PhD Thesis
|ContentType=Övrigt vetenskapligt
|Language=eng
|Journal=
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|Year=2014
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|Pages=51
|City=Halmstad, Sweden
|Publisher=Halmstad University Press
|Series=Halmstad University Dissertations ; 6
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|ISBN=978-91-87045-11-0
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|NBN=urn:nbn:se:hh:diva-25318
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|Keywords=Machine learning;Data mining;Colour printing;Smart homes
|Categories=Signalbehandling (20205)
|ResearchSubjects=
|Projects=PPQ;SA3L
|Notes=
|Abstract=<p>Machine learning methods are increasingly being used to solve real-world problems in the society. Often, the complexity of the methods are well hidden for users. However, integrating machine learning methods in real-world applications is not a straightforward process and requires knowledge both about the methods and domain knowledge of the problem. Two such domains are colour print quality assessment and anomaly detection in smart homes, which are currently driven by manual monitoring of complex situations. The goal of the presented work is to develop methods, algorithms and tools to facilitate monitoring and understanding of the complex situations which arise in colour print quality assessment and anomaly detection for smart homes. The proposed approach builds on the use and adaption of supervised and unsupervised machine learning methods.</p><p>Novel algorithms for computing objective measures of print quality in production are proposed in this work. Objective measures are also modelled to study how paper and press parameters influence print quality. Moreover, a study on how print quality is perceived by humans is presented and experiments aiming to understand how subjective assessments of print quality relate to objective measurements are explained. The obtained results show that the objective measures reflect important aspects of print quality, these measures are also modelled with reasonable accuracy using paper and press parameters. The models of objective measures are shown to reveal relationships consistent to known print quality phenomena.</p><p>In the second part of this thesis the application area of anomaly detection in smart homes is explored. A method for modelling human behaviour patterns is proposed. The model is used in order to detect deviating behaviour patterns using contextual information from both time and space. The proposed behaviour pattern model is tested using simulated data and is shown to be suitable given four types of scenarios.</p><p>The thesis shows that parts of offset lithographic printing, which traditionally is a human-centered process, can be automated by the introduction of image processing and machine learning methods. Moreover, it is concluded that in order to facilitate robust and accurate anomaly detection in smart homes, a holistic approach which makes use of several contextual aspects is required.</p>
|Opponents=Botía Blaya, Juan A., Professor
|Supervisors=Verikas, Antanas [av], Professor (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], ;;CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650])
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|DefencePlace=Wigforss Visionen, Halmstad University, Halmstad
|DefenceLanguage=eng
|DefenceDate=2014-06-13T13:15
|CreatedDate=2014-05-09
|PublicationDate=2014-05-09
|LastUpdated=2014-05-09
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Publications:Technology and trust : Social and technical innovation in elderly care

2014-06-13T13:36:20Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Helena Eriksson, Anna Isaksson, Jens Lundström |PID=678028 |Name=Eriksson,..."

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{{PublicationSetupTemplate|Author=Helena Eriksson, Anna Isaksson, Jens Lundström
|PID=678028
|Name=Eriksson, Helena [heer] (Högskolan i Halmstad [2804], Sektionen för hälsa och samhälle (HOS) [3904], Centrum för forskning om välfärd, hälsa och idrott (CVHI) [3927], Wigforss-gruppen [4900]);Isaksson, Anna [anis] (Högskolan i Halmstad [2804], Sektionen för hälsa och samhälle (HOS) [3904], Centrum för samhällsanalys (CESAM) [11500]);Lundström, Jens [jenlun] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Technology and trust : Social and technical innovation in elderly care
|PublicationType=Conference Paper
|ContentType=Övrigt vetenskapligt
|Language=eng
|Journal=
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|HostPublication=Abstracts EGI2013
|Conference=Equality, Growth and Innovation - In Theory and Practice, Luleå University of Technology, Luleå, Sweden, 9-10 October, 2013
|StartPage=17
|EndPage=18
|Year=2013
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|Categories=Sociologi (504);Elektroteknik och elektronik (202)
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|Abstract=<p>A demographic change is occurring in many areas of the world. The elderly population share has been increasing for the last decades and estimations predict that this group will be large in proportion to the number of economically active younger people. This change will bring exponentially increasing costs of health care. Technical developments could be one way to meet these new challenges. In a recent study called “Safe at night” the aim was to investigate whether a technical solution based can be used to supplement the home care work, with focus on the nightly visits of the elderly. The study raises questions regarding technical issues as well as actors (users, relatives and staffs) perspective on the methods. Researchers from both social and technical disciplines were involved in the study. In this paper, we highlight the importance of scientists from different disciplines participating in the study, as well as municipalities and industry. We show in particular the knowledge gained from a technical perspective and from a social science perspective and how and why these perspectives together constitute the necessary components to create innovation regarding elderly care and issues related to technology and trust.</p>
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Publications:Colour speck counter for assessing the dirt level in secondary fibre pulps

2014-06-13T13:36:08Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Antanas Verikas, Kerstin Malmqvist, Lars Bergman, P. Engstrand |PID=237395 ..."

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{{PublicationSetupTemplate|Author=Antanas Verikas, Kerstin Malmqvist, Lars Bergman, P. Engstrand
|PID=237395
|Name=Verikas, Antanas [av] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Malmqvist, Kerstin (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Bergman, Lars [lb] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Engstrand, P. (Center of Excellence, Holmen Paper AB, Norrkoping, Sweden)
|Title=Colour speck counter for assessing the dirt level in secondary fibre pulps
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=Journal of Pulp and Paper Science (JPPS)
|JournalISSN=0826-6220
|Status=published
|Volume=29
|Issue=7
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|StartPage=220
|EndPage=224
|Year=2003
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|City=Montreal
|Publisher=Pulp and Paper Technical Association of Canada
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|ISI=000185031700002
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|ScopusId=2-s2.0-0142059189
|NBN=urn:nbn:se:hh:diva-217
|LocalId=2082/512
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|Keywords=Dirt count;Machine design;Image analysis;Measuring instruments;Reclaimed fibers
|Categories=Teknik och teknologier (2)
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|Abstract=<p>Speck count is increasingly used as a parameter to assess the quality of secondary fibre pulps. The resolution of most of the commercial image analysis systems is too low for detecting small specks. Therefore, small specks are not taken into consideration when using conventional image analysis systems to assess pulp quality. We have recently developed a colour speck counter which can detect specks ranging in size from ∼5 to 300 μm. In this paper, we present the results of experimental investigations related to the use of the speck counter to assess the dirt level in secondary fibre pulps. We assume an exponential speck size distribution and advocate the idea of using the scale parameter λ of the distribution to characterize the size content of a set of specks detected. Experimental investigations performed have shown that the scale parameter, together with the expected speck area and the speck number, can be used to characterize and rank secondary fibre pulps according to dirt level and the dirt-size distribution.</p>
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|CreatedDate=2006-11-24
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|LastUpdated=2014-05-08
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Publications:Monitoring the de-inking process through neural network-based colour image analysis

2014-06-13T13:36:06Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Antanas Verikas, Kerstin Malmqvist, M. Bacauskiene, Lars Bergman |PID=28582..."

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{{PublicationSetupTemplate|Author=Antanas Verikas, Kerstin Malmqvist, M. Bacauskiene, Lars Bergman
|PID=285828
|Name=Verikas, Antanas [av] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Malmqvist, Kerstin [kermal] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Bacauskiene, M. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania );Bergman, Lars [lb] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Monitoring the de-inking process through neural network-based colour image analysis
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=Neural computing & applications (Print)
|JournalISSN=0941-0643
|Status=published
|Volume=9
|Issue=2
|HostPublication=
|Conference=
|StartPage=142
|EndPage=151
|Year=2000
|Edition=
|Pages=
|City=New York, USA
|Publisher=Springer-Verlag New York
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1007/s005210070025
|ISI=000088547900009
|PMID=
|ScopusId=2-s2.0-0034336492
|NBN=urn:nbn:se:hh:diva-3544
|LocalId=
|ArchiveNumber=
|Keywords=Classification;Colour image processing;Fuzzy sets;Neural networks;Self-organising map;Classifier networks;Graphic arts;Fuzzy;Segmentation
|Categories=Teknik och teknologier (2)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>This paper presents an approach to determining the colours of specks in an image of a pulp being recycled. The task is solved through colour classification by an artificial neural network. The network is trained using fuzzy possibilistic target values. The number of colour classes found in the images is determined through the self-organising process in the two-dimensional self-organising map. The experiments performed have shown that the colour classification results correspond well with human perception of the colours of the specks.</p>
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Publications:Learning an Adaptive Dissimilarity Measure for Nearest Neighbour Classification

2014-06-13T13:36:04Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Antanas Verikas, M. Bacauskiene, Kerstin Malmqvist |PID=237389 |Name=Verika..."

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{{PublicationSetupTemplate|Author=Antanas Verikas, M. Bacauskiene, Kerstin Malmqvist
|PID=237389
|Name=Verikas, Antanas [av] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Bacauskiene, M. (Department of Applied Electronics, Kaunas University of Technology Kaunas, Lithuania);Malmqvist, Kerstin (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Learning an Adaptive Dissimilarity Measure for Nearest Neighbour Classification
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=Neural computing & applications (Print)
|JournalISSN=0941-0643
|Status=published
|Volume=11
|Issue=3-4
|HostPublication=
|Conference=
|StartPage=203
|EndPage=209
|Year=2003
|Edition=
|Pages=
|City=London
|Publisher=Springer
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1007/s00521-003-0356-1
|ISI=000184615000009
|PMID=
|ScopusId=2-s2.0-0038792231
|NBN=urn:nbn:se:hh:diva-211
|LocalId=2082/506
|ArchiveNumber=
|Keywords=Classification;Clustering;Learning vector quantisation;Nearest neighbour;Neural network
|Categories=Data- och informationsvetenskap (102)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>In this paper, an approach to weighting features for classification based on the nearest-neighbour rules is proposed. The weights are adaptive in the sense that the weight values are different in various regions of the feature space. The values of the weights are found by performing a random search in the weight space. A correct classification rate is the criterion maximised during the search. Experimentally, we have shown that the proposed approach is useful for classification. The weight values obtained during the experiments show that the importance of features may be different in different regions of the feature space</p>
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Publications:An intelligent system for tuning magnetic field of a cathode ray tube deflection yoke

2014-06-13T13:36:03Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Antanas Verikas, M. Bacauskiene, A. Dosinas, V. Bartkevicius, A. Gelzinis, ..."

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{{PublicationSetupTemplate|Author=Antanas Verikas, M. Bacauskiene, A. Dosinas, V. Bartkevicius, A. Gelzinis, M. Vaitkunas, A. Lipnickas
|PID=237391
|Name=Verikas, Antanas [av] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Bacauskiene, M. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania);Dosinas, A. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania);Bartkevicius, V. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania);Gelzinis, A. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania);Vaitkunas, M. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania);Lipnickas, A. (Department of Applied Electronics, Kaunas University of Technology, Kaunas, Lithuania)
|Title=An intelligent system for tuning magnetic field of a cathode ray tube deflection yoke
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=Knowledge-Based Systems
|JournalISSN=0950-7051
|Status=published
|Volume=16
|Issue=3
|HostPublication=
|Conference=
|StartPage=161
|EndPage=164
|Year=2003
|Edition=
|Pages=
|City=Amsterdam
|Publisher=Elsevier Science
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1016/S0950-7051(02)00081-3
|ISI=000181221200004
|PMID=
|ScopusId=2-s2.0-0037397227
|NBN=urn:nbn:se:hh:diva-213
|LocalId=2082/508
|ArchiveNumber=
|Keywords=Cathode ray tube;Learning;Neural network;Simulated annealing
|Categories=Data- och informationsvetenskap (102)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>This short communication concerns identification of the number of magnetic correction shunts and their positions for deflection yoke tuning to correct the misconvergence of colours of a cathode ray tube. The misconvergence of colours is characterised by the distances measured between the traces of red and blue beams. The method proposed consists of two phases, namely, learning and optimisation. In the learning phase, the radial basis function neural network is trained to learn a mapping: correction shunt position→changes in misconvergence. In the optimisation phase, the trained neural network is used to predict changes in misconvergence depending on a correction shunt position. An optimisation procedure based on the predictions returned by the neural net is then executed in order to find the minimal number of correction shunts needed and their positions. During the experimental investigations, 98% of the deflection yokes analysed have been tuned successfully using the technique proposed.</p>
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|LastUpdated=2014-05-08
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:237391}}
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Publications:A New Two-Degree-of-Freedom Space Heating Model for Demand Response

2014-06-13T13:35:50Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Anita Sant'Anna, Robert Bass |PID=711349 |Name=Sant'Anna, Anita [anisan] (H..."

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{{PublicationSetupTemplate|Author=Anita Sant'Anna, Robert Bass
|PID=711349
|Name=Sant'Anna, Anita [anisan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650]);Bass, Robert (Portland State University, Portland, OR, USA) (Department of Electrical & Computer Engineering)
|Title=A New Two-Degree-of-Freedom Space Heating Model for Demand Response
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=
|Conference=3rd International Conference on Smart Grids and Green IT Systems - SMARTGREENS 2014, Barcelona, Spain, 3-4 April, 2014
|StartPage=
|EndPage=
|Year=2014
|Edition=
|Pages=
|City=
|Publisher=
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-25004
|LocalId=
|ArchiveNumber=
|Keywords=Space Heating;Demand Response;Thermal Comfort;Thermodynamic Model;Simulation
|Categories=Annan elektroteknik och elektronik (20299)
|ResearchSubjects=
|Projects=
|Notes=<p>Partial funding for this research was provided by Portland General Electric (PGE).</p>
|Abstract=<p>In today’s fast changing electric utilities sector demand response (DR) programs are a relatively inexpensive means of reducing peak demand and providing ancillary services. Advancements in embedded systems and communication technologies are paving the way for more complex DR programs based on transactive control. Such complex systems highlight the importance of modeling and simulation tools for studying and evaluatingthe effects of different control strategies for DR. Considerable efforts have been directed at modeling thermostatically controlled appliances. These models however operate with only one degree of freedom, typically, the thermal mass temperature. This paper proposes a two-degree-of-freedom residential space heating systemcomposed of a thermal storage unit and forced convection system. Simulation results demonstrate that such system is better suited for maintaining thermal comfort and allows greater flexibility for DR programs. The performance of several control strategies are evaluated, as well as the effects of model and weather parameterson thermal comfort and power consumption.</p>
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|PublicationDate=2014-04-10
|LastUpdated=2014-05-28
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:711349}}
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Publications:Ground angle estimator from an ankle foot orthosis based on strain sensing and Fourier series

2014-03-13T11:50:49Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg |PID=239007 |Name=Svensson, Wolfgang [wolsv..."

<div style='display: none'>
== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg
|PID=239007
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Ground angle estimator from an ankle foot orthosis based on strain sensing and Fourier series
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=IEEE International Conference on Mechatronics and Automation, 2008. ICMA 2008
|Conference=IEEE International Conference on Mechatronics and Automation Location, Takamatsu, JAPAN, 5-8 August, 2008
|StartPage=203
|EndPage=206
|Year=2008
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=978-1-4244-2632-4
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/ICMA.2008.4798752
|ISI=000267671500037
|PMID=
|ScopusId=2-s2.0-65349119316
|NBN=urn:nbn:se:hh:diva-1789
|LocalId=2082/2184
|ArchiveNumber=
|Keywords=Fourier series;ankle foot orthosis;gait cycle;ground angle estimation;strain gauge sensors
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=<p>©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.</p>
|Abstract=<p>A ground angle estimation technique for use on ankle-foot-orthosis AFO, during gait is proposed. Strain gauge sensors were mounted on a foot orthosis in order to give information about strain in the sagittal plane. The ankle angle of the orthosis was fixed. Strain characteristics were therefore changed when walking on slopes. It was investigated if strain information could be used for detection of inclination and estimation of inclination angle. With a Fourier series representation of the strain during a gait cycle, ground angle at different walking speeds and inclinations could be estimated with similar accuracy as previous studies using kinematically based estimators. This indicates that embedded strain sensors can be used for online control of future orthoses with inclination adaptation.</p>
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|CreatedDate=2008-08-21
|PublicationDate=2008-08-21
|LastUpdated=2012-09-24
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239007}}
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Publications:Stair Gait Classification from Kinematic Sensors

2014-03-13T11:50:48Z

<div style='display: none'>
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{{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg
|PID=239015
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Stair Gait Classification from Kinematic Sensors
|PublicationType=Book Chapter
|ContentType=Övrigt vetenskapligt
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=Rehabilitation Robotics
|Conference=
|StartPage=523
|EndPage=534
|Year=2007
|Edition=
|Pages=
|City=Wien
|Publisher=I-Tech Education and Publishing KG
|Series=
|SeriesISSN=
|ISBN=978-3-902613-01-1
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-1797
|LocalId=2082/2192
|ArchiveNumber=
|Keywords=Stair gait classification;kinematic sensors
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=<p>Abstracting and non-profit use of the material is permitted with the credit to the source. After this work has been published by the I-Tech Education and Publishing, authors have the right to republish it, in whole or part, in any publication of which they are an author or editor, and the make other personal use of the work. (www.ars-journal.com)</p>
|Abstract=<p>Gait measurement is of interest for both orthopedists and biomechanical engineers. It is useful for analysis of gait disorders and in design of orthotic and prosthetic devices.</p><p>In this chapter an algorithm is presented to suit estimation of one foot angle in the sagital plane, independent on gait conditions. Only one gyro is used during swing and two accelerometers are needed for calibration during stance. Also, the sensor placement at the front foot avoids the need for heel strike for stance transition. Stair walking can therefore be studied. From the estimated swing trajectory three different gait conditions: up stair, horizontal and down stair are classified.</p>
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|CreatedDate=2008-08-27
|PublicationDate=2008-08-27
|LastUpdated=2012-09-24
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239015}}
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Publications:An Autonomous Control System for a Prosthetic Foot Ankle

2014-03-13T11:50:48Z

<div style='display: none'>
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{{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg
|PID=239016
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=An Autonomous Control System for a Prosthetic Foot Ankle
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=4th IFAC Symposium on Mechatronic Systems (2006)
|Conference=4th IFAC Symposium on Mechatronic Systems, 12 - 14 september, 2006, Ruprecht-Karls-University, Germany
|StartPage=856
|EndPage=861
|Year=2006
|Edition=
|Pages=
|City=
|Publisher=International Federation of Automatic Control (IFAC)
|Series=Mechatronic Systems ; vol. 4, part 1
|SeriesISSN=
|ISBN=978-3-902661-17-3
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-1798
|LocalId=2082/2193
|ArchiveNumber=
|Keywords=accelerometers;hill climbing;walking;actuator;adaptive system
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=<p>Preprints of the 4th IFAC-Symposium on Mechatronics Systems. Copyright © 2006 International Federation of Automatic Control (IFAC). All rights reserved. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional pruposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from IFAC. For technical support please contact Transfer GmbH.</p>
|Abstract=<p>When walking on inclined ground the biological foot adjusts the ankle angle accordingly. Prosthetic foot users have often a limited range of motion in their ankle which makes walking on hills uncomfortable. This paper describes a system which can autonomously correct the ankle angle to the inclination. The ground angle is estimated using an accelerometer. The angle foot blade to heel is then adjusted with a DC-motor. Since the controller only activates the motor when the foot is lifted and thus not loaded, a small powered system can be used.</p>
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|CreatedDate=2008-08-27
|PublicationDate=2008-08-27
|LastUpdated=2012-12-20
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239016}}
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Publications:Ankle-Foot-Orthosis Control in Inclinations and Stairs

2014-03-13T11:50:48Z

<div style='display: none'>
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{{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg
|PID=239346
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Ankle-Foot-Orthosis Control in Inclinations and Stairs
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=2008 IEEE Conference on Robotics, Automation and Mechatronics
|Conference=Robotics, Automation and Mechatronics, 2008 IEEE Conference on, Chengdu, PEOPLES Rep. CHINA, 21-24 Sept. 2008
|StartPage=301
|EndPage=306
|Year=2008
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=978-1-4244-1676-9
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/RAMECH.2008.4681479
|ISI=000269060400158
|PMID=
|ScopusId=2-s2.0-58049120348
|NBN=urn:nbn:se:hh:diva-2128
|LocalId=2082/2523
|ArchiveNumber=
|Keywords=gait control;orthosis;stair walking;magneto-rheological damper
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=<p>©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.</p>
|Abstract=<p>A control procedure is proposed for an ankle-footorthosis (AFO) for different gait situations, such as inclinations and stairs. This paper presents a novel AFO control of the ankle angle. A magneto-rheological damper was used to achieve ankle damping during foot down and locking at swing, thereby avoiding foot slap as well as foot drop.</p><p>The controller used feedback from the ankle angle only. Still it was capable of not only adjusting damping within a gait step but also changing control behavior depending on level walking, ascending and descending stairs. As a consequence, toe strike was possible in stair gait as opposed to heel strike in level walking.</p><p>Tests verified the expected behavior in stair gait and in level walking where gait speed and ground inclinations varied. The self-adjusted AFO is believed to improve gait comfort in slopes and stairs.</p>
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|DefenceDate=
|CreatedDate=2008-11-12
|PublicationDate=2008-11-12
|LastUpdated=2012-09-24
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239346}}
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Publications:Estimating Ground Inclination Using Strain Sensors with Fourier Series Representation

2014-03-13T11:50:47Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg |PID=310945 |Name=Svensson, Wolfgang [wolsv..."

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{{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg
|PID=310945
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Estimating Ground Inclination Using Strain Sensors with Fourier Series Representation
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=Journal of Robotics
|JournalISSN=1687-9600
|Status=published
|Volume=2010
|Issue=
|HostPublication=
|Conference=
|StartPage=1
|EndPage=8
|Year=2010
|Edition=
|Pages=
|City=New York
|Publisher=Hindawi Publishing Corporation
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1155/2010/465618
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-4295
|LocalId=
|ArchiveNumber=
|Keywords=Estimation;Strain sensors;Fourier series;Ground inclination;Orthorsis
|Categories=Signalbehandling (20205)
|ResearchSubjects=
|Projects=
|Notes=<p>Article ID: 465618</p>
|Abstract=<p>An embedded measurement system for foot orthosis during gait is proposed. Strain gauge sensors were mounted on a foot orthosis to give information about strain in the sagittal plane. The ankle angle of the orthosis was fixed and strain characteristics were therefore changed when walking on slopes. With a Fourier series representation of the strain during a gait cycle, ground angle at different walking speeds and inclinations could be estimated with similar accuracy as previous studies using kinematically based estimators. Furthermore, if the angle of the mechanical foot ankle was changed, the sensing technique still could estimate ground angle without need for recalibration as opposed to kinematical sensors. This indicates that embedded strain sensors can be used for online control of future orthoses with inclination adaptation. Also, there would be no need to recalibrate the sensing system when changing shoes with different heel heights.</p>
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|DefenceDate=
|CreatedDate=2010-04-19
|PublicationDate=2010-04-20
|LastUpdated=2013-01-18
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:310945}}
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Publications:Foot and ground measurement using portable sensors

2014-03-13T11:50:47Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg |PID=560861 |Name=Svensson, Wolfgang [wolsv..."

<div style='display: none'>
== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Wolfgang Svensson, Ulf Holmberg
|PID=560861
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Foot and ground measurement using portable sensors
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=2005 IEEE 9th International Conference on Rehabilitation Robotics : Chicago, IL, 28 June - 1 July 2005
|Conference=IEEE 9th International Conference on Rehabilitation Robotics, June 28-July 01, 2005, Chicago, IL
|StartPage=448
|EndPage=451
|Year=2005
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=International Conference on Rehabilitation Robotics ICORR
|SeriesISSN=1945-7898
|ISBN=0-7803-9003-2
|Urls=
|ISRN=
|DOI=
|ISI=000233375400102
|PMID=
|ScopusId=2-s2.0-33745790480
|NBN=urn:nbn:se:hh:diva-18727
|LocalId=
|ArchiveNumber=
|Keywords=Computer simulation;Image sensors;Object recognition;Orthopedics;Portable equipment;Prosthetics;Sensory feedback
|Categories=Teknik och teknologier (2)
|ResearchSubjects=
|Projects=
|Notes=<p>Article number 1501139</p><p>Category number EX1028</p><p>Code 67638</p>
|Abstract=<p>A portable gait measurement system for foot dynamic analysis is proposed. Portable cheap sensors are suitable in active control rehabilitation equipments such as prostheses and orthoses. A system of one gyroscope and two accelerometers was used to measure the foot movement in the sagital plane. Both ground inclination during stance and foot angle relative to ground during swing are estimated. This enables fast detection of changing environments such as hills and stairs.</p>
|Opponents=
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|DefencePlace=
|DefenceLanguage=
|DefenceDate=
|CreatedDate=2012-06-25
|PublicationDate=2012-10-16
|LastUpdated=2012-10-16
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:560861}}
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Publications:A modular CACC system integration and design

2014-03-13T11:50:47Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Kristoffer Lidström, Katrin Sjöberg, Ulf Holmberg, Johan Andersson, Fredr..."

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== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Kristoffer Lidström, Katrin Sjöberg, Ulf Holmberg, Johan Andersson, Fredrik Bergh, Mattias Bjäde, Spencer Mak
|PID=550593
|Name=Lidström, Kristoffer [krilid] (Viktoria Inst, Cooperat Syst Grp, S-41756 Gothenburg, Sweden);Sjöberg, Katrin [kasj] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Centrum för forskning om inbyggda system (CERES) [6702]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Centrum för forskning om inbyggda system (CERES) [6702]);Andersson, Johan (Volvo Car Corp, Telematics Area, S-40531 Gothenburg, Sweden);Bergh, Fredrik (Cybercom Grp, S-10393 Stockholm, Sweden);Bjäde, Mattias (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905]);Mak, Spencer (Innovat Team, S-30248 Halmstad, Sweden)
|Title=A modular CACC system integration and design
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=IEEE transactions on intelligent transportation systems (Print)
|JournalISSN=1524-9050
|Status=published
|Volume=13
|Issue=3
|HostPublication=
|Conference=
|StartPage=1050
|EndPage=1061
|Year=2012
|Edition=
|Pages=
|City=Piscataway
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=
|Urls=http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6236177
|ISRN=
|DOI=http://dx.doi.org/10.1109/TITS.2012.2204877
|ISI=000312805000007
|PMID=
|ScopusId=2-s2.0-84863773935
|NBN=urn:nbn:se:hh:diva-19506
|LocalId=
|ArchiveNumber=
|Keywords=Cooperative adaptive cruise control;grand cooperative driving challenge;platooning
|Categories=Teknik och teknologier (2)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>This paper describes the Halmstad University entry in the Grand Cooperative Driving Challenge, which is a competition in vehicle platooning. Cooperative platooning has the potential to improve traffic flow by mitigating shock wave effects, which otherwise may occur in dense traffic. A longitudinal controller that uses information exchanged via wireless communication with other cooperative vehicles to achieve string-stable platooning is developed. The controller is integrated into a production vehicle, together with a positioning system, communication system, and human–machine interface (HMI). A highly modular system architecture enabled rapid development and testing of the various subsystems. In the competition, which took place in May 2011 on a closed-off highway in The Netherlands, the Halmstad University team finished second among nine competing teams.</p>
|Opponents=
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|ThesisLevel=
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|Subject=
|Uppsok=
|DefencePlace=
|DefenceLanguage=
|DefenceDate=
|CreatedDate=2012-09-07
|PublicationDate=2012-09-07
|LastUpdated=2013-02-25
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:550593}}
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Publications:Comments on "A Revisit to the Gain and Phase Margins ofLinear Quadratic Regulators"

2014-03-13T11:50:47Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Ulf Holmberg |PID=296798 |Name=Holmberg, Ulf [ulho] (Högskolan i Halmstad ..."

<div style='display: none'>
== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Ulf Holmberg
|PID=296798
|Name=Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Comments on “A Revisit to the Gain and Phase Margins ofLinear Quadratic Regulators”
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=IEEE Transactions on Automatic Control
|JournalISSN=0018-9286
|Status=published
|Volume=46
|Issue=9
|HostPublication=
|Conference=
|StartPage=1508
|EndPage=1509
|Year=2001
|Edition=
|Pages=
|City=New York
|Publisher=IEEE
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/9.948488
|ISI=
|PMID=
|ScopusId=2-s2.0-0035439811
|NBN=urn:nbn:se:hh:diva-3412
|LocalId=
|ArchiveNumber=
|Keywords=Linear control systems;Cascade control systems;Closed loop control systems;Polynomials;State feedback;System stability
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=©2001 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
|Abstract=<p>In the above paper, an example is given, showing that the LQ controller gives an arbitrary small gain margin with respect to variations of the open-loop plant. As a remedy, a dynamic-state feedback is proposed which is claimed to give an arbitrary large gain margin. This is incorrect. In fact, the proposed dynamic state feedback controller does not even stabilize the nominal system.</p>
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|DefenceLanguage=
|DefenceDate=
|CreatedDate=2009-12-01
|PublicationDate=2010-02-18
|LastUpdated=2011-04-12
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:296798}}
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Publications:On-line arithmetic for real-time control of microsystems

2014-03-13T11:50:46Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Martin Dimmler, Arnaud Tisserand, Ulf Holmberg, Roland Longchamp |PID=30017..."

<div style='display: none'>
== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Martin Dimmler, Arnaud Tisserand, Ulf Holmberg, Roland Longchamp
|PID=300173
|Name=Dimmler, Martin (Ecole Polytechnique Fédérale de Lausanne, Switzerland);Tisserand, Arnaud (Ecole Polytechnique Fédérale de Lausanne, Switzerland);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905]);Longchamp, Roland (Ecole Polytechnique Fédérale de Lausanne, Switzerland)
|Title=On-line arithmetic for real-time control of microsystems
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=IEEE/ASME transactions on mechatronics
|JournalISSN=1083-4435
|Status=published
|Volume=4
|Issue=2
|HostPublication=
|Conference=
|StartPage=213
|EndPage=217
|Year=1999
|Edition=
|Pages=
|City=Piscataway, NJ
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/3516.769548
|ISI=000080964000012
|PMID=
|ScopusId=2-s2.0-0032645387
|NBN=urn:nbn:se:hh:diva-3379
|LocalId=
|ArchiveNumber=
|Keywords=Computer control;Analog to digital conversion;Computational methods;Control system synthesis;Digital arithmetic;Microcontrollers;Online systems;Real time systems;Signal processing
|Categories=Elektroteknik och elektronik (202)
|ResearchSubjects=
|Projects=
|Notes=©1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
|Abstract=<p>The integration of microcontrollers within mechanical systems is a current trend. However, decreasing the size of the system and satisfying higher precision requirements make it necessary to reevaluate the common signal processing techniques for controller implementations, because limited controller size, computation speed, and power consumption become major topics. In this paper, we demonstrate that serial computations with the most significant digits first, that is, on-line arithmetic, offer an important potential for real-time control. They enable a combination of traditional functions, such as analog-to-digital converters and control data computations. This leads to very efficient controller implementations with small size, high speed, and low power consumption. After a brief description of the requirements and challenges of microsystem controller design, the use of on-line arithmetic for real-time control is proposed. A short introduction to on-line arithmetic is given and control-specific implementation guidelines are presented and finally applied to a simple test system.</p>
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|DefenceLanguage=
|DefenceDate=
|CreatedDate=2009-12-01
|PublicationDate=2010-02-25
|LastUpdated=2012-06-28
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:300173}}
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Publications:Foot orthosis strain sensing in hill walking

2014-03-13T11:50:46Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Wolfgang Svensson, Tommy Salomonsson, Ulf Holmberg |PID=239018 |Name=Svenss..."

<div style='display: none'>
== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Wolfgang Svensson, Tommy Salomonsson, Ulf Holmberg
|PID=239018
|Name=Svensson, Wolfgang [wolsve] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Salomonsson, Tommy [tommy] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Foot orthosis strain sensing in hill walking
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=ICORR '07 : 2007 IEEE 10th International Conference on Rehabilitation Robotics : June 12-15, Noordwijk, The Netherlands
|Conference=10th International Conference on Rehabilitation Robotics, June 12-15, Noordwijk, The Netherlands
|StartPage=700
|EndPage=703
|Year=2007
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=International Conference on Rehabilitation Robotics ICORR
|SeriesISSN=1945-7898
|ISBN=978-1-4244-1320-1
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/ICORR.2007.4428502
|ISI=000255389600105
|PMID=
|ScopusId=2-s2.0-48349108993
|NBN=urn:nbn:se:hh:diva-1800
|LocalId=2082/2195
|ArchiveNumber=
|Keywords=strain sensing;orthosis;embedded measurement system;hill walking;foot orthosis;strain gauge sensors
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=<p>©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.</p>
|Abstract=<p>An embedded measurement system for foot orthosis during gait is proposed. In this paper strain gauge sensors are mounted on a foot orthosis in order to give information about strain in the sagital plane. The ankle angle of the orthosis is fixed. Strain characteristics are therefore changed when walking on slopes. It is investigated if strain information can be used for detection of inclination and estimation of inclination angle. Also walking speed influence is studied. It is shown that strain sensing only gives significant information about up hill walking. At a known walking speed ground angle can be estimated for up hill walking.</p>
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|Uppsok=
|DefencePlace=
|DefenceLanguage=
|DefenceDate=
|CreatedDate=2008-08-27
|PublicationDate=2008-08-27
|LastUpdated=2013-02-12
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:239018}}
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Publications:Illuminance Flow Estimation by Regression

2014-03-13T11:50:46Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Stefan Karlsson, Sylvia C. Pont, Jan J. Koenderink, Andrew Zisserman |PID=5..."

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== Do not edit this section ==
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{{PublicationSetupTemplate|Author=Stefan Karlsson, Sylvia C. Pont, Jan J. Koenderink, Andrew Zisserman
|PID=537591
|Name=Karlsson, Stefan M. [stekar] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Pont, Sylvia C. ( Pi-Lab., Industrial Design Engineering, Delft University of Technology, Landbergstraat 15, Delft 2628 CE, Netherlands);Koenderink, Jan J. (Pi-Lab., Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Mekelweg 4, Delft 2028 CD, Netherlands);Zisserman, Andrew (Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom)
|Title=Illuminance Flow Estimation by Regression
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=International Journal of Computer Vision
|JournalISSN=0920-5691
|Status=published
|Volume=90
|Issue=3
|HostPublication=
|Conference=
|StartPage=304
|EndPage=312
|Year=2010
|Edition=
|Pages=
|City=Amsterdam
|Publisher=Elsevier
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1007/s11263-010-0353-7
|ISI=000282782700003
|PMID=
|ScopusId=2-s2.0-78149283686
|NBN=urn:nbn:se:hh:diva-18894
|LocalId=
|ArchiveNumber=
|Keywords=Illuminance flow;Surface 3D texture;Histogram of oriented gradients;Illuminant estimation
|Categories=Teknik och teknologier (2)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>We investigate the estimation of illuminance flow using Histograms of Oriented Gradient features (HOGs). In a regression setting, we found for both ridge regression and support vector machines, that the optimal solution shows close resemblance to the gradient based structure tensor (also known as the second moment matrix). Theoretical results are presented showing in detail how the structure tensor and the HOGs are connected. This relation will benefit computer vision tasks such as affine invariant texture/object matching using HOGs. Several properties of HOGs are presented, among others, how many bins are required for a directionality measure, and how to estimate HOGs through spatial averaging that requires no binning.</p>
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|Uppsok=
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|DefenceLanguage=
|DefenceDate=
|CreatedDate=2012-06-25
|PublicationDate=2012-06-27
|LastUpdated=2012-09-26
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:537591}}
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Publications:Computing the minimum EDF feasible deadline in periodic systems

2014-03-13T11:50:45Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Hoai Hoang, Giorgio Buttazzo, Magnus Jonsson, Stefan Karlsson |PID=237551 |..."

<div style='display: none'>
== Do not edit this section ==
</div>
{{PublicationSetupTemplate|Author=Hoai Hoang, Giorgio Buttazzo, Magnus Jonsson, Stefan Karlsson
|PID=237551
|Name=Hoang, Hoai [hoang] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Buttazzo, Giorgio (Real-Time Systems Laboratory Scuola Superiore Sant’Anna Pisa, Italy);Jonsson, Magnus [magnusj] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938]);Karlsson, Stefan [stekar] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Computing the minimum EDF feasible deadline in periodic systems
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=12th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, 2006. Proceedings
|Conference=12th IEEE Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA 2006), 16-18 August 2006, Sydney, Australia
|StartPage=125
|EndPage=134
|Year=2006
|Edition=
|Pages=
|City=Los Alamitos, Calif.
|Publisher=IEEE Press
|Series=IEEE International Conference on Embedded and Real-Time Computing Systems and Applications ; 2006
|SeriesISSN=1533-2306
|ISBN=0-7695-2676-4
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/RTCSA.2006.22
|ISI=000240851900019
|PMID=
|ScopusId=2-s2.0-34547275304
|NBN=urn:nbn:se:hh:diva-372
|LocalId=2082/696
|ArchiveNumber=
|Keywords=Real-time;Scheduling
|Categories=Data- och informationsvetenskap (102)
|ResearchSubjects=
|Projects=
|Notes=<p>©2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.</p>
|Abstract=<p>In most real-time applications, deadlines are artifices that need to be enforced to meet different performance requirements. For example, in periodic task sets, jitter requirements can be met by assigning suitable relative deadlines and guaranteeing the feasibility of the schedule. This paper presents a method (called minD) for calculating the minimum EDF-feasible deadline of a real-time task. More precisely, given a set of periodic tasks with hard real-time requirements, which is feasible under EDF, the proposed algorithm allows computing the shortest deadline that can be assigned to an arbitrary task in the set, or to a new incoming task (periodic or aperiodic), still preserving the EDF feasibility of the new task set. The algorithm has a pseudo polynomial complexity and handles arbitrary relative deadlines, which can be less than, equal to, or greater than periods.</p>
|Opponents=
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|ThesisLevel=
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|Programme=
|Subject=
|Uppsok=
|DefencePlace=
|DefenceLanguage=
|DefenceDate=
|CreatedDate=2007-01-05
|PublicationDate=2007-01-05
|LastUpdated=2014-01-23
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:237551}}
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Publications:Battery aging detection based on sequential clustering and similarity analysis

2014-03-13T11:50:45Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Gancho Vachkov, Stefan Byttner, Magnus Svensson |PID=550673 |Name=Vachkov, ..."

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{{PublicationSetupTemplate|Author=Gancho Vachkov, Stefan Byttner, Magnus Svensson
|PID=550673
|Name=Vachkov, Gancho (Yamaguchi University);Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Svensson, Magnus [magsveARC13] (Volvo Group Trucks Technology)
|Title=Battery aging detection based on sequential clustering and similarity analysis
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=IS'2012 : 2012 6th IEEE International Conference Intelligent Systems, Proceedings
|Conference=6th IEEE International Conference Intelligent Systems, IS 2012, Sofia, Bulgaria, 6-8 September 2012, Category number: CFP12802-PRT, Code: 94030
|StartPage=
|EndPage=
|Year=2012
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=978-146732782-4
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/IS.2012.6335112
|ISI=
|PMID=
|ScopusId=2-s2.0-84869838414
|NBN=urn:nbn:se:hh:diva-19512
|LocalId=
|ArchiveNumber=
|Keywords=battery aging detection;data aggregation;fuzzy inference;sequential clustering;similarity analysis;weighted approximation
|Categories=Signalbehandling (20205)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>The battery cells are an important part of electric and hybrid vehicles and their deterioration due to aging directly affects the life cycle and performance of the whole battery system. Therefore an early aging detection of the battery cell is an important task and its correct solution could significantly improve the whole vehicle performance. This paper presents a computational strategy for battery aging detection, based on available data chunks from real operation of the vehicle. The first step is to aggregate (reduce) the original large amount of data by much smaller number of cluster centers. This is done by a newly proposed sequential clustering algorithm that arranges the clusters in decreasing order of their volumes. The next step is the proposed fuzzy inference procedure for weighed approximation of the cluster centers that creates comparable one dimensional fuzzy model for each available data set. Finally, the detection of the aged battery is treated as a similarity analysis problem, in which the pair distances between all battery cells are estimated by analyzing the predicted values from the respective fuzzy models. All these three steps of the computational procedure are explained in the paper and applied to real experimental data for battery aging detection. The results are positive and suggestions for further improvements are made in the conclusions. © 2012 IEEE.</p>
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Publications:Detection of Deviation in Performance of Battery Cells by Data Compression and Similarity Analysis

2014-03-13T11:50:45Z

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{{PublicationSetupTemplate|Author=Gancho Vachkov, Stefan Byttner, Magnus Svensson
|PID=681781
|Name=Vachkov, Gancho (School of Engineering and Physics, Faculty of Science, Technology and Environment, The University of the South Pacific, Laucala Bay, Suva, Fiji);Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Laboratoriet för intelligenta system [6703]);Svensson, Magnus (Volvo Technology, Göteborg, Sweden)
|Title=Detection of Deviation in Performance of Battery Cells by Data Compression and Similarity Analysis
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=International Journal of Intelligent Systems
|JournalISSN=0884-8173
|Status=published
|Volume=29
|Issue=3
|HostPublication=
|Conference=
|StartPage=207
|EndPage=222
|Year=2014
|Edition=
|Pages=
|City=Hoboken, NJ
|Publisher=John Wiley & Sons
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1002/int.21637
|ISI=
|PMID=
|ScopusId=2-s2.0-84890378057
|NBN=urn:nbn:se:hh:diva-24224
|LocalId=
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|Keywords=
|Categories=Signalbehandling (20205)
|ResearchSubjects=
|Projects=
|Notes=<p>Special Issue: Advances in Intelligent Systems</p>
|Abstract=<p>The battery cells are an important part of electric and hybrid vehicles, and their deterioration due to aging or malfunction directly affects the life cycle and performance of the whole battery system. Therefore, an early detection of deviation in performance of the battery cells is an important task and its correct solution could significantly improve the whole vehicle performance. This paper presents a computational strategy for the detection of deviation of battery cells, due to aging or malfunction. The detection is based on periodically processing a predetermined number of data collected in data blocks that are obtained during the real operation of the vehicle. The first step is data compression, when the original large amount of data is reduced to smaller number of cluster centers. This is done by a newly proposed sequential clustering algorithm that arranges the clusters in decreasing order of their volumes. The next step is using a fuzzy inference procedure for weighted approximation of the cluster centers to create one-dimensional models for each battery cell that represents the voltage–current relationship. This creates an equal basis for the further comparison of the battery cells. Finally, the detection of the deviated battery cells is treated as a similarity-analysis problem, in which the pair distances between all battery cells are estimated by analyzing the estimations for voltage from the respective fuzzy models. All these three steps of the computational procedure are explained in the paper and applied to real experimental data for the detection of deviation of five battery cells. Discussions and suggestions are made for a practical application aimed at designing a monitoring system for the detection of deviations. © 2013 Wiley Periodicals, Inc.</p>
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Publications:Data-driven methods for classification of driving styles in buses

2014-03-13T11:50:44Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Nadezda Karginova, Stefan Byttner, Magnus Svensson |PID=550683 |Name=Kargin..."

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{{PublicationSetupTemplate|Author=Nadezda Karginova, Stefan Byttner, Magnus Svensson
|PID=550683
|Name=Karginova, Nadezda (Petrozavodsk University);Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Svensson, Magnus [magsveARC13] (Volvo Group Trucks Technology)
|Title=Data-driven methods for classification of driving styles in buses
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=
|Conference=SAE 2012 World Congress & Exhibition, Cobo Center, Detroit, Michigan, USA, April 24-26, 2012
|StartPage=
|EndPage=
|Year=2012
|Edition=
|Pages=
|City=Warrendale, PA
|Publisher=SAE International
|Series=SAE Technical Papers ; 2012-01-0744
|SeriesISSN=0148-7191
|ISBN=
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.4271/2012-01-0744
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-19513
|LocalId=
|ArchiveNumber=
|Keywords=
|Categories=Signalbehandling (20205)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>Fuel consumption and vehicle breakdown depend upon the driving style of the driver, for example, hard driving style leads to more wear and consequently more failures of vehicle components. Because of this, it is important to identify and classify the driver’s driving style in order to give the driver feedback through a driver assistance system. The driver would then be able to detect and learn to avoid a driving style that is not appropriate. The input data is provided by different sensors installed in the vehicle, where different drivers and driving routes have been measured. The data is subjectively classified into two different driving styles: normal and hard. Hard driving style can be characterized, for example, by rapid acceleration and braking. Since it is not trivial to build a model which is able to distinguish hard driving from normal, a data mining approach has been employed. In the paper, several classifiers are compared (including e.g. neural networks and decision trees) and a discussion is made on the advantages and disadvantages of the different methods.</p>
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Publications:Incremental classification of process data for anomaly detection based on similarity analysis

2014-03-13T11:50:44Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Stefan Byttner, Magnus Svensson, Gancho Vachkov |PID=404651 |Name=Byttner, ..."

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{{PublicationSetupTemplate|Author=Stefan Byttner, Magnus Svensson, Gancho Vachkov
|PID=404651
|Name=Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Svensson, Magnus [magsveARC13] (Volvo Technology, 405 08 Göteborg, Sweden);Vachkov, Gancho (Reliability-based Information Systems Engineering, Kagawa University, 761-0396 Kagawa, Japan)
|Title=Incremental classification of process data for anomaly detection based on similarity analysis
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=EAIS 2011 : 2011 IEEE Workshop on Evolving and Adaptive Intelligent Systems : April 11-15, 2011, Paris, France
|Conference=Symposium Series on Computational Intelligence, IEEE SSCI 2011 - 2011 IEEE 5th Workshop on Evolving and Adaptive Intelligent Systems, EAIS 2011, Paris, France, 11 - 15 April 2011, Category number CFP1114N-ART, Code85920
|StartPage=108
|EndPage=115
|Year=2011
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=978-142449979-3
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/EAIS.2011.5945928
|ISI=
|PMID=
|ScopusId=2-s2.0-80051492287
|NBN=urn:nbn:se:hh:diva-14597
|LocalId=
|ArchiveNumber=
|Keywords=anomaly detection;compressed data models;incremental classification;intelligent sensors;sequential clustering;similarity analysis
|Categories=Data- och informationsvetenskap (102)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>Performance evaluation and anomaly detection in complex systems are time consuming tasks based on analyzing, similarity analysis and classification of many different data sets from real operations. This paper presents an original computational technology for unsupervised incremental classification of large data sets by using a specially introduced similarity analysis method. First of all the so called compressed data models are obtained from the original large data sets by a newly proposed sequential clustering algorithm. Then the datasets are compared by pairs not directly, but by using their respective compressed data models. The evaluation of the pairs is done by a special similarity analysis method that uses the so called Intelligent Sensors (Agents) and data potentials. Finally a classification decision is generated by using a predefined threshold of similarity. The applicability of the proposed computational scheme for anomaly detection, based on many available large data sets is demonstrated on an example of 18 synthetic data sets. Suggestions for further improvements of the whole computation technology and a better applicability are also discussed in the paper.</p>
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|CreatedDate=2011-03-17
|PublicationDate=2011-03-17
|LastUpdated=2013-01-22
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Publications:Closed-loop control of EGR using ion currents

2014-03-13T11:50:44Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Stefan Byttner, Ulf Holmberg |PID=239079 |Name=Byttner, Stefan [stefan] (H..."

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{{PublicationSetupTemplate|Author=Stefan Byttner, Ulf Holmberg
|PID=239079
|Name=Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Holmberg, Ulf [ulho] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Closed-loop control of EGR using ion currents
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=Proceedings of the 27th IASTED International Conference on Modelling, Identification, and Control, MIC
|Conference=27th IASTED International Conference on Modelling, Identification, and Control, 11-13 February, 2008, Innsbruck, Austria
|StartPage=7
|EndPage=
|Year=2008
|Edition=
|Pages=
|City=Anaheim
|Publisher=ACTA Press
|Series=
|SeriesISSN=
|ISBN=978-0-88986-711-6;978-0-88986-712-3
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=2-s2.0-77955173650
|NBN=urn:nbn:se:hh:diva-1861
|LocalId=2082/2256
|ArchiveNumber=
|Keywords=ion currents;virtual sensing;electronic engine control;exhaust gas recirculation;ignition timing;combustion variability
|Categories=Reglerteknik (20202)
|ResearchSubjects=
|Projects=
|Notes=<p>Sponsors, the International Association of Science and Technology for Development (IASTED), Technical Committee on Modelling and Simulation, Technical Committee on Control, World Modelling and Simulation Forum (WMSF)</p>
|Abstract=<p>Two virtual sensors are proposed that use the spark-plug based ion current sensor for combustion engine control. The first sensor estimates combustion variability for the purpose of controlling exhaust gas recirculation (EGR) and the second sensor estimates the pressure peak position for control of ignition timing. Use of EGR in engines is important because the technique can reduce fuel consumption and NOx emissions, but recirculating too much can have the adverse effect with e.g. increased fuel consumption and poor driveability of the vehicle. Since EGR also affects the phasing of the combustion (because of the diluted gas mixture with slower combustion) it is also necessary to control ignition timing otherwise efficiency will be lost. The combustion variability sensor is demonstrated in a closed-loop control experiment of EGR on the highway and the pressure peak sensor is shown to handle both normal and an EGR condition.</p>
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|CreatedDate=2008-09-09
|PublicationDate=2008-09-09
|LastUpdated=2012-10-08
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Publications:Algorithms for ion current based sensing of combustion variability and pressure peak position

2014-03-13T11:50:44Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Stefan Byttner |PID=237884 |Name=Byttner, Stefan [stefan] (Högskolan i Hal..."

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{{PublicationSetupTemplate|Author=Stefan Byttner
|PID=237884
|Name=Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905])
|Title=Algorithms for ion current based sensing of combustion variability and pressure peak position
|PublicationType=Licentiate Thesis
|ContentType=Övrigt vetenskapligt
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=
|Conference=
|StartPage=
|EndPage=
|Year=2003
|Edition=
|Pages=43
|City=
|Publisher=Göteborg : Chalmers tekniska högsk.
|Series=Technical report. L ; 482
|SeriesISSN=1651-4998
|ISBN=
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-666
|LocalId=2082/1008
|ArchiveNumber=
|Keywords=Algorithms;Combustion variability;Pressure peak position
|Categories=
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|Notes=
|Abstract=<p>Contains 4 papers.</p>
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|CreatedDate=2007-05-07
|PublicationDate=2007-05-07
|LastUpdated=2011-04-05
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:237884}}
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Publications:Real-time control of an SI engine using ion current based algorithms

2014-03-13T11:50:43Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Stefan Byttner |PID=237886 |Name=Byttner, Stefan [stefan] (Högskolan i Hal..."

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{{PublicationSetupTemplate|Author=Stefan Byttner
|PID=237886
|Name=Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938])
|Title=Real-time control of an SI engine using ion current based algorithms
|PublicationType=PhD Thesis
|ContentType=Övrigt vetenskapligt
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=
|Conference=
|StartPage=
|EndPage=
|Year=2005
|Edition=
|Pages=57
|City=Göteborg
|Publisher=Chalmers tekniska högskola
|Series=Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie ; 2395
|SeriesISSN=0346-718X
|ISBN=91-7291-713-X
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-668
|LocalId=2082/1010
|ArchiveNumber=
|Keywords=Internal Combustion Engines;Neural Networks;Ion Current
|Categories=Teknik och teknologier (2)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>Reducing emissions and improving fuel efficiency in automobiles are today important issues. New sensor techniques are developed to extract detailed combustion information to enable closed loop engine control. This thesis is about a virtual sensor; measuring an ion current inside the cylinder by using the already existing spark plug, followed by signal processing for estimation of combustion parameters. First, the thesis aims to show that the ion current signal can be used for closed loop control of Exhaust Gas Recirculation (EGR). Use of EGR is very common in modern automobiles because of the potential reduction of NOx emissions and fuel consumption, but using too much EGR can have the reverse effect (e.g. increased fuel consumption and driveability problems). Algorithms for estimating combustion variability are proposed and a closed loop scheme for controlling an EGR valve is demonstrated for driving on the highway in a SAAB 9000. Estimation of the pressure peak position is treated for closed loop control of ignition timing. Such estimation can be performed with the ion current but may not work if a fuel additive is used. Different methods are compared and it is shown that using a fuel additive may even improve the estimation accuracy of the pressure peak position with about 25%. An algorithm is also proposed to estimate the pressure peak position even in presence of EGR. Strategies for transient control of the air-fuel ratio are also compared. Air-fuel ratio control is important because even small deviations from the stoichiometric value can result in significantly increased emissions. It is found that a neural network based controller had the best performance with approximately 23% lower RMS error than the adapted standard control module.</p>
|Opponents=Haphout, Robert, Jean-Pierre, Dr.
|Supervisors=
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|DefencePlace= Wigforssalen Högskolan i Halmstad Halmstad
|DefenceLanguage=eng
|DefenceDate=2005-12-16T10:00
|CreatedDate=2007-05-07
|PublicationDate=2007-05-07
|LastUpdated=2012-12-12
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:237886}}
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Publications:An Experimental Study of Using Rule Induction Algorithm in Combiner Multiple Classifier

2014-03-13T11:50:43Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Jerzy Stefanowski, Sławomir Nowaczyk |PID=587676 |Name=Stefanowski, Jerzy ..."

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{{PublicationSetupTemplate|Author=Jerzy Stefanowski, Sławomir Nowaczyk
|PID=587676
|Name=Stefanowski, Jerzy (Poznan University of Technology);Nowaczyk, Sławomir [slanow] (Lund University)
|Title=An Experimental Study of Using Rule Induction Algorithm in Combiner Multiple Classifier
|PublicationType=Journal Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=International Journal of Computational Intelligence Research
|JournalISSN=0974-1259
|Status=published
|Volume=3
|Issue=4
|HostPublication=
|Conference=
|StartPage=335
|EndPage=342
|Year=2007
|Edition=
|Pages=
|City=New Delhi
|Publisher=Research India Publications
|Series=
|SeriesISSN=
|ISBN=
|Urls=http://www.ijcir.com/download.php?idArticle=114
|ISRN=
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|NBN=urn:nbn:se:hh:diva-21040
|LocalId=
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|Keywords=
|Categories=Datavetenskap (datalogi) (10201)
|ResearchSubjects=
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|Notes=
|Abstract=<p>Multiple classifiers consist of sets of subclassifiers, whose individual predictions are combined to classify new objects. These approaches attract an interest of researchers as they can outperform single classifiers on wide range of classification problems. This paper presents an experimental study of using the rule induction algorithm MODLEM in the multiple classifier scheme called combiner, which is a specific meta learning approach to aggregate answers of component classifiers. Our experimental results show that the improvement of predictive accuracy depends on the independence of errors made by the base classifiers. Moreover, we summarise our experience with using MODLEM as component in other multiple classifiers, namely bagging and n2 classifiers.</p>
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|LastUpdated=2013-10-28
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:587676}}
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Publications:On using rule induction in multiple classifiers with a combiner aggregation strategy

2014-03-13T11:50:43Z

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{{PublicationSetupTemplate|Author=Jerzy Stefanowski, Sławomir Nowaczyk
|PID=588349
|Name=Stefanowski, Jerzy (Poznan University of Technology);Nowaczyk, Sławomir [slanow] (Lund University)
|Title=On using rule induction in multiple classifiers with a combiner aggregation strategy
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=Proceedings - 5th International Conference on Intelligent Systems Design and Applications 2005, ISDA '05
|Conference=5th International Conference on Intelligent Systems Design and Applications 2005, ISDA '05, 8-10 September 2005, Wroclaw, Poland
|StartPage=432
|EndPage=437
|Year=2005
|Edition=
|Pages=
|City=Los Alamitos
|Publisher=IEEE Computer Society
|Series=
|SeriesISSN=
|ISBN=978-076952286-9
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|ISRN=
|DOI=http://dx.doi.org/10.1109/ISDA.2005.74
|ISI=000233058700073
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|ScopusId=2-s2.0-33847004781
|NBN=urn:nbn:se:hh:diva-21123
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|Keywords=Algorithms;Classification (of information);Classifiers;Error analysis;Metadata
|Categories=Teknik och teknologier (2)
|ResearchSubjects=
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|Notes=
|Abstract=<p>The paper is an experimental study of using the rough sets based rule induction algorithm MODLEM in the framework of multiple classifiers. Particular attention is paid to using a meta-classifier called combiner, which learns how to aggregate answers of component classifiers. The experimental results confirm that the range of classification improvement for the combiner depends on the independence of errors made by the component classifiers. Moreover, we summarize the experience with using MODLEM in other multiple classifiers, namely the bagging and n <sup>2</sup> classifiers. © 2005 IEEE.</p>
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Publications:Towards relation discovery for diagnostics

2014-03-13T11:50:42Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Rune Prytz, Sławomir Nowaczyk, Stefan Byttner |PID=437123 |Name=Prytz, Run..."

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{{PublicationSetupTemplate|Author=Rune Prytz, Sławomir Nowaczyk, Stefan Byttner
|PID=437123
|Name=Prytz, Rune [runpryARC13] (Volvo Technology);Nowaczyk, Sławomir [slanow] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941]);Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Intelligenta system (IS-lab) [3941])
|Title=Towards relation discovery for diagnostics
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=Proceedings of the First International Workshop on Data Mining for Service and Maintenance
|Conference=17th ACM SIGKDD Conference on Knowledge Discovery and Data Mining
|StartPage=23
|EndPage=27
|Year=2011
|Edition=
|Pages=
|City=New York, NY
|Publisher=Association for Computing Machinery (ACM)
|Series=
|SeriesISSN=
|ISBN=978-145030842-7
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1145/2018673.2018678
|ISI=
|PMID=
|ScopusId=2-s2.0-80052625970
|NBN=urn:nbn:se:hh:diva-15995
|LocalId=
|ArchiveNumber=
|Keywords=Fault detection;Machine learning;Vehicle diagnostics
|Categories=Datavetenskap (datalogi) (10201)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>It is difficult to implement predictive maintenance in the automotive industry as it looks today, since the sensor capabilities and engineering effort available for diagnostic purposes is limited. It is, in practice, impossible to develop diagnostic algorithms capable of detecting many different kinds of faults that would be applicable to a wide range of vehicle configurations and usage patterns. However, it is now becoming feasible to obtain and analyse on-board data on vehicles as they are being used. It makes automatic data-mining methods an attractive alternative, since they are capable of adapting themselves to specific vehicle configurations and usage. In order to be useful, though, such methods need to be able to detect interesting relations between a large number of available signals. This paper presents an unsupervised method for discovering useful relations between measured signals in a Volvo truck, both during normal operations and when a fault has occurred. The interesting relationships are found in a two-step procedure. In the first step, we identify a set of “good” models, by establishing an MSE threshold over the complete data set. In the second step, we estimate model parameters over time, in order to capture the dynamic behaviour of the system. We use two different approaches here, the LASSO method and the Recursive Least Squares filter. The usefulness of obtained relations is then evaluated using supervised learning to separate different classes of faults.</p>
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Publications:Relative relevance of subsets of agent's knowledge

2014-03-13T11:50:42Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Jacek Malec |PID=587662 |Name=Nowaczyk, Sławomir [slan..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Jacek Malec
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|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Lund, Sweden);Malec, Jacek (Department of Computer Science, Lund University, Lund, Sweden)
|Title=Relative relevance of subsets of agent's knowledge
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Publications:An architecture for resource bounded agents

2014-03-13T11:50:42Z

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Jacek Malec
|PID=587665
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Lund, Sweden);Malec, Jacek (Department of Computer Science, Lund University, Lund, Sweden)
|Title=An architecture for resource bounded agents
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|HostPublication=Proceedings of the International Multiconference on Computer Science and Information Technology : Volume 2
|Conference=International Multiconference on Computer Science and Information Technology, Wisła, Poland, October 15–17
|StartPage=59
|EndPage=69
|Year=2007
|Edition=
|Pages=
|City=Piscataway, N.J.
|Publisher=IEEE Press
|Series=Proceedings of the International Multiconference on Computer Science and Information Technology
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Publications:Inductive logic programming algorithm for estimating quality of partial plans

2014-03-13T11:50:42Z

<div style='display: none'>
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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Jacek Malec
|PID=587659
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Sweden);Malec, Jacek (Department of Computer Science, Lund University, Sweden)
|Title=Inductive logic programming algorithm for estimating quality of partial plans
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
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|Status=
|Volume=
|Issue=
|HostPublication=MICAI 2007: Advances in Artificial Intelligence : 6th Mexican International Conference on Artificial Intelligence, Aguascalientes, Mexico, November 4-10, 2007. Proceedings
|Conference=6th Mexican International Conference on Artificial Intelligence, Aguascalientes, Mexico, November 4-10, 2007
|StartPage=359
|EndPage=369
|Year=2007
|Edition=
|Pages=
|City=Berlin
|Publisher=Springer Berlin/Heidelberg
|Series=Lecture Notes in Computer Science ; 4827
|SeriesISSN=0302-9743
|ISBN=978-3-540-76631-5;978-3-540-76630-8
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1007/978-3-540-76631-5_34
|ISI=000251037900034
|PMID=
|ScopusId=2-s2.0-38149099905
|NBN=urn:nbn:se:hh:diva-21024
|LocalId=
|ArchiveNumber=
|Keywords=Algorithms;Intelligent agents;Specifications
|Categories=Datavetenskap (datalogi) (10201)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>We study agents situated in partially observable environments, who do not have the resources to create conformant plans. Instead, they create conditional plans which are partial, and learn from experience to choose the best of them for execution. Our agent employs an incomplete symbolic deduction system based on Active Logic and Situation Calculus for reasoning about actions and their consequences. An Inductive Logic Programming algorithm generalises observations and deduced knowledge in order to choose the best plan for execution. We show results of using PROGOL learning algorithm to distinguish "bad" plans, and we present three modifications which make the algorithm fit this class of problems better. Specifically, we limit the search space by fixing semantics of conditional branches within plans, we guide the search by specifying relative relevance of portions of knowledge base, and we integrate learning algorithm into the agent architecture by allowing it to directly access the agent's knowledge encoded in Active Logic. We report on experiments which show that those extensions lead to significantly better learning results.</p>
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Publications:Learning to evaluate conditional partial plans

2014-03-13T11:50:41Z

<div style='display: none'>
== Do not edit this section ==
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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Jacek Malec
|PID=587664
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Sweden);Malec, Jacek (Department of Computer Science, Lund University, Sweden)
|Title=Learning to evaluate conditional partial plans
|PublicationType=Conference Paper
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|Language=eng
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|HostPublication=ICMLA 2007 : Sixth International Conference on Machine Learning and Applications : proceedings : 13-15 Dec. 2007, Cincinnati, Ohio, USA
|Conference=Sixth International Conference on Machine Learning and Applications, 13-15 Dec. 2007, Cincinnati, Ohio, USA
|StartPage=235
|EndPage=240
|Year=2007
|Edition=
|Pages=
|City=Los Alamitos, Calif.
|Publisher=IEEE Computer Society
|Series=
|SeriesISSN=
|ISBN=978-0-7695-3069-7;0-7695-3069-9
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/ICMLA.2007.101
|ISI=000252793400039
|PMID=
|ScopusId=2-s2.0-47349091660
|NBN=urn:nbn:se:hh:diva-21029
|LocalId=
|ArchiveNumber=
|Keywords=Agents;Artificial intelligence;Boolean functions;Computer programming;Education;Fuzzy logic;Learning systems;Logic programming;Quality control;Robot learning
|Categories=Datavetenskap (datalogi) (10201)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>We study agents situated in partially observable environments, who do not have sufficient resources to create conformant plans. Instead, they generate plans which are conditional and partial, execute or simulate them, and learn to evaluate their quality from experience. Our agent employs an incomplete symbolic deduction system based on Active Logic and Situation Calculus for reasoning about actions and their consequences. An Inductive Logic Programming algorithm generalises observations and deduced knowledge, allowing the agent to execute a good plan. We show results of using PROGOL learning algorithm to distinguish "bad" plans early in the reasoning process, before too many resources are wasted on considering them. We show that additional knowledge needs to be provided before learning can be successful, but argue that the benefits achieved make it worthwhile. Finally, we identify several assumptions made by PROGOL, shared by other similarly universal algorithms, which are well justified in general, but fail to exploit the properties of the class of problems faced by rational agents.</p>
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Publications:Learning to Evaluate Conditional Partial Plans

2014-03-13T11:50:41Z

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== Do not edit this section ==
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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Jacek Malec
|PID=587666
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Sweden);Malec, Jacek (Department of Computer Science, Lund University, Sweden)
|Title=Learning to Evaluate Conditional Partial Plans
|PublicationType=Conference Paper
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|Language=eng
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|HostPublication=Proceedings of the Planning to Learn Workshop : PlanLearn-07, September 17, 2007, Warsaw, Poland
|Conference=Planning to Learn Workshop, The 18th European Conference on Machine Learning (ECML) and the 11th European Conference on Principles and Practice of Knowledge Discovery in Databases (PKDD) (ECML/PKDD 2007), September 17-21, 2007, Warsaw, Poland
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Publications:Mind the Gap! Bridging the Gap between Theory and Practice in Laboratory Assignments

2014-03-13T11:50:41Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Cristina Isvoranu, Saioa Zorita, Thaer Barri, Florentin..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Cristina Isvoranu, Saioa Zorita, Thaer Barri, Florentina Trif
|PID=587678
|Name=Nowaczyk, Sławomir [slanow] (Lund University, Lund, Sweden);Isvoranu, Cristina (Lund University, Lund, Sweden);Zorita, Saioa (Lund University, Lund, Sweden);Barri, Thaer (Lund University, Lund, Sweden);Trif, Florentina (Lund University, Lund, Sweden)
|Title=Mind the Gap! Bridging the Gap between Theory and Practice in Laboratory Assignments
|PublicationType=Conference Paper
|ContentType=Övrigt vetenskapligt
|Language=eng
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|HostPublication=Utvecklingskonferens LU 2007 : Konferensbidrag
|Conference=Utvecklingskonferens LU, 27 september
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|City=Lund
|Publisher=Lunds universitet
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Publications:Ideas for Fault Detection Using Relation Discovery

2014-03-13T11:50:40Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Stefan Byttner, Rune Prytz |PID=528136 |Name=Nowaczyk, ..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk, Stefan Byttner, Rune Prytz
|PID=528136
|Name=Nowaczyk, Sławomir [slanow] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Laboratoriet för intelligenta system [6703]);Byttner, Stefan [stefan] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Laboratoriet för intelligenta system [6703]);Prytz, Rune [runpryARC13] (Volvo Group Trucks Technology)
|Title=Ideas for Fault Detection Using Relation Discovery
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
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|HostPublication=
|Conference=The 27th annual workshop of the Swedish Artificial Intelligence Society (SAIS), 14–15 May 2012, Örebro, Sweden
|StartPage=1
|EndPage=6
|Year=2012
|Edition=
|Pages=
|City=Linköping
|Publisher=Linköping University Electronic Press
|Series=Linköping Electronic Conference Proceedings ; 071
|SeriesISSN=1650-3740
|ISBN=
|Urls=
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|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-17718
|LocalId=
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|Keywords=
|Categories=Datavetenskap (datalogi) (10201)
|ResearchSubjects=
|Projects=Redi2Service
|Notes=
|Abstract=<p>Predictive maintenance is becoming more and more important in many industries, especially taking into account the increasing focus on offering uptime guarantees to the customers. However, in automotive industry, there is a limitation on the engineering effort and sensor capabilities available for that purpose. Luckily, it has recently become feasible to analyse large amounts of data on-board vehicles in a timely manner. This allows approaches based on data mining and pattern recognition techniques to augment existing, hand crafted algorithms.</p><p>Automated deviation detection offers both broader applicability, by virtue of detecting unexpected faults and cross-analysing data from different subsystems, as well as higher sensitivity, due to its ability to take into account specifics of a selected, small set of vehicles used in a particular way under similar conditions.</p><p>In a project called Redi2Service we work towards developing methods for autonomous and unsupervised relationship discovery, algorithms for detecting deviations within those relationships (both considering different moments in time, and different vehicles in a fleet), as well as ways to correlate those deviations to known and unknown faults. In this paper we present the type of data we are working with, justify why we believe relationships between signals are a good knowledge representation, and show results of early experiments where supervised learning was used to evaluate discovered relations.</p>
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Publications:A Knowledge-Based Approach to Modelling Planning Domains with Uncertainty for Resource Bounded Agents

2014-03-13T11:50:40Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk |PID=587657 |Name=Nowaczyk, Sławomir [slanow] (Chair of..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk
|PID=587657
|Name=Nowaczyk, Sławomir [slanow] (Chair of Automatics, Akademia Górniczo-Hutnicza (AGH) University of Science and Technology, Kraków, Poland)
|Title=A Knowledge-Based Approach to Modelling Planning Domains with Uncertainty for Resource Bounded Agents
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|Conference=7th Conference on Computer Methods and Systems, Krakow, Poland, 26-27 November
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|Year=2009
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Publications:Partial planning for situated agents based on active logic

2014-03-13T11:50:40Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk |PID=587669 |Name=Nowaczyk, Sławomir [slanow] (Departme..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk
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Publications:Knowledge Representation for Learning How to Evaluate Partial Plans

2014-03-13T11:50:40Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk |PID=587672 |Name=Nowaczyk, Sławomir [slanow] (Departme..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk
|PID=587672
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Lund, Sweden)
|Title=Knowledge Representation for Learning How to Evaluate Partial Plans
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|HostPublication=Proceedings of SAIS 2007 : The 24th Annual Workshop of the Swedish Artificial Intelligence Society, Borås, May 22-23, 2007
|Conference=24th Annual Workshop of the Swedish Artificial Intelligence Society (SAIS-07), Borås, May 22-23
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Publications:Learning and Planning of Situated Resource Bounded Agents

2014-03-13T11:50:39Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk |PID=587673 |Name=Nowaczyk, Sławomir [slanow] (Departme..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk
|PID=587673
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Lund, Sweden)
|Title=Learning and Planning of Situated Resource Bounded Agents
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
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|Issue=
|HostPublication=Proceedings of SAIS 2006 : The 23rd Annual Workshop of the Swedish Artificial Intelligence Society
|Conference=The 23rd Annual Workshop of the Swedish Artificial Intelligence Society Workshop, Umeå, Sweden, May 10-12
|StartPage=87
|EndPage=96
|Year=2006
|Edition=
|Pages=
|City=Umeå
|Publisher=Swedish Artificial Intelligence Society - SAIS, Umeå universitet
|Series=UMINF ; 06:19
|SeriesISSN=0348-0542
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|Urls=http://lup.lub.lu.se/record/1002959/file/1023632
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Publications:Learning of agents with limited resources

2014-03-13T11:50:39Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Sławomir Nowaczyk |PID=587667 |Name=Nowaczyk, Sławomir [slanow] (Departme..."

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{{PublicationSetupTemplate|Author=Sławomir Nowaczyk
|PID=587667
|Name=Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Lund, Sweden)
|Title=Learning of agents with limited resources
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|Language=eng
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|HostPublication=AAAI'06 proceedings of the 21st national conference on Artificial intelligence - Volume 2
|Conference=21st National Conference on Artificial Intelligence and the 18th Innovative Applications of Artificial Intelligence Conference, AAAI-06/IAAI-06;Boston, MA, USA 16-20 July
|StartPage=1893
|EndPage=1894
|Year=2006
|Edition=
|Pages=
|City=Menlo Park, Calif.
|Publisher=AAAI Press
|Series=
|SeriesISSN=
|ISBN=978-1-57735-281-5;1577352815
|Urls=http://www.aaai.org/Library/AAAI/2006/aaai06-325.php
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|ScopusId=2-s2.0-33750742224
|NBN=urn:nbn:se:hh:diva-21032
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|LastUpdated=2013-10-28
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Publications:Deduction and Exploratory Assessment of Partial Plans

2014-03-13T11:50:39Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Jacek Malec, Sławomir Nowaczyk |PID=587671 |Name=Malec, Jacek (Department ..."

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{{PublicationSetupTemplate|Author=Jacek Malec, Sławomir Nowaczyk
|PID=587671
|Name=Malec, Jacek (Department of Computer Science, Lund University, Lund, Sweden);Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Lund, Sweden)
|Title=Deduction and Exploratory Assessment of Partial Plans
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=Proceedings of the IJCAI 2005 Workshop on Planning and Learning in A Priori Unknown or Dynamic Domains : the International Joint Conference on Artificial Intelligence, IJCAI
|Conference=Workshop on Planning and Learning in A Priori Unknown or Dynamic Domains (IJCAI-05), Edinburgh, United Kingdom, 30 July - 5 Aug 2005
|StartPage=117
|EndPage=124
|Year=2005
|Edition=
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|City=Edinburgh
|Publisher=
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|NBN=urn:nbn:se:hh:diva-21034
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|Categories=Datavetenskap (datalogi) (10201)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>In this paper we present a preliminary investigation of rational agents who, aware of their own limited mental resources, use learning to augment their reasoning. In our approach an agent creates and deductively reasons about possible plans of actions ,but — aware of the fact that finding complete plans is in many cases intractable — it executes partial plans which look promising. By doing so, it can acquire new knowledge from results of performed actions, which allows it to plan further into the future in a more effective way. We describe a possible application of Inductive Logic Programming to learn which of such partial plans are most likely to lead to reaching the goal. We also discuss how one can use ILP framework for generalising partial plans, thus allowing an agent to discover, after a number of episodes, a complete plan — or at least a good approximation of it.</p>
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Publications:Knowledge-Based Reconfiguration of Automation Systems

2014-03-13T11:50:39Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Jacek Malec, Anders Nilsson, Klas Nilsson, Sławomir Nowaczyk |PID=587679 |..."

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{{PublicationSetupTemplate|Author=Jacek Malec, Anders Nilsson, Klas Nilsson, Sławomir Nowaczyk
|PID=587679
|Name=Malec, Jacek (Department of Computer Science, Lund University, Box 118, S-221 00 Lund, Sweden);Nilsson, Anders (Department of Computer Science, Lund University, Box 118, S-221 00 Lund, Sweden);Nilsson, Klas (Department of Computer Science, Lund University, Box 118, S-221 00 Lund, Sweden);Nowaczyk, Sławomir [slanow] (Department of Computer Science, Lund University, Box 118, S-221 00 Lund, Sweden)
|Title=Knowledge-Based Reconfiguration of Automation Systems
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=Automation Science and Engineering, 2007. CASE 2007. IEEE International Conference on
|Conference=3rd IEEE International Conference on Automation Science and Engineering (IEEE CASE), Scottsdale, AZ, SEP 22-25, 2007
|StartPage=170
|EndPage=175
|Year=2007
|Edition=
|Pages=
|City=Piscataway
|Publisher=IEEE Press
|Series=
|SeriesISSN=
|ISBN=978-1-4244-1154-2;1-4244-1154-8
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.1109/COASE.2007.4341829
|ISI=000256345500162
|PMID=
|ScopusId=2-s2.0-44449090140
|NBN=urn:nbn:se:hh:diva-21043
|LocalId=
|ArchiveNumber=
|Keywords=Automation;Formal logic;Knowledge acquisition;Ontology
|Categories=Datorsystem (20206)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>This article describes the work in progress on knowledge-based reconfiguration of a class of automation systems. The knowledge about manufacturing is represented in a number of formalisms and gathered around an ontology expressed in OWL, that allows generic reasoning in Description Logic. In the same time multiple representations facilitate efficient processing by a number of special-purpose reasoning modules, specific for the application domain. At the final stage of reconfiguration we exploit ontology-based rewriting, simplifying creation of the final configuration files.</p>
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Publications:Declarative Knowledge-Based Reconfiguration of Automation Systems Using a Blackboard Architecture

2014-03-13T11:50:38Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Mathias Haage, Jacek Malec, Anders Nilsson, Klas Nilsson, Sławomir Nowaczy..."

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{{PublicationSetupTemplate|Author=Mathias Haage, Jacek Malec, Anders Nilsson, Klas Nilsson, Sławomir Nowaczyk
|PID=587675
|Name=Haage, Mathias (Department of Computer Science, Lund University, Lund, Sweden);Malec, Jacek (Department of Computer Science, Lund University, Lund, Sweden);Nilsson, Anders (Department of Computer Science, Lund University, Lund, Sweden);Nilsson, Klas (Department of Computer Science, Lund University, Lund, Sweden);Nowaczyk, Sławomir [slanow] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], Laboratoriet för intelligenta system [6703])
|Title=Declarative Knowledge-Based Reconfiguration of Automation Systems Using a Blackboard Architecture
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
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|Volume=
|Issue=
|HostPublication=
|Conference=11th Scandinavian Conference on Artificial Intelligence, Trondheim, Norway, May 24-26
|StartPage=163
|EndPage=172
|Year=2011
|Edition=
|Pages=
|City=Amsterdam
|Publisher=IOS Press
|Series=Frontiers in Artificial Intelligence and Applications ; 227
|SeriesISSN=0922-6389
|ISBN=978-1-60750-753-6
|Urls=
|ISRN=
|DOI=http://dx.doi.org/10.3233/978-1-60750-754-3-163
|ISI=
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|ScopusId=2-s2.0-79956141087
|NBN=urn:nbn:se:hh:diva-21038
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Publications:Knowledge Representation for Reconfigurable Automation Systems

2014-03-13T11:50:38Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Ola Angelsmark, Jacek Malec, Klas Nilsson, Sławomir Nowaczyk, Leonardo Pro..."

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{{PublicationSetupTemplate|Author=Ola Angelsmark, Jacek Malec, Klas Nilsson, Sławomir Nowaczyk, Leonardo Prosperi
|PID=587681
|Name=Angelsmark, Ola (ABB, Sweden);Malec, Jacek (Lund University, Lund, Sweden);Nilsson, Klas (Lund University, Lund, Sweden);Nowaczyk, Sławomir [slanow] (Lund University, Lund, Sweden);Prosperi, Leonardo
|Title=Knowledge Representation for Reconfigurable Automation Systems
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
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|HostPublication=
|Conference=International Conference on Robotics and Automation (ICRA-07) Workshop on Semantic Information in Robotics, Rome, Italy, 10 April
|StartPage=
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|Year=2007
|Edition=
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|Urls=http://ftp://aass.oru.se/pub/ICRA07/AngelsmarkEtAl_sir07.pdf
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|NBN=urn:nbn:se:hh:diva-21046
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|Categories=Datorsystem (20206)
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|LastUpdated=2013-10-28
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Publications:Identification of Gait Events using Expert Knowledge and Continuous Wavelet Transform Analysis

2014-03-13T11:50:38Z

SlawekBot: Created page with "<div style='display: none'> == Do not edit this section == </div> {{PublicationSetupTemplate|Author=Siddhartha Khandelwal, Nicholas Wickström |PID=688909 |Name=Khandelwal, Si..."

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{{PublicationSetupTemplate|Author=Siddhartha Khandelwal, Nicholas Wickström
|PID=688909
|Name=Khandelwal, Siddhartha [sidkha] (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650]);Wickström, Nicholas (Högskolan i Halmstad [2804], Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE) [3905], Halmstad Embedded and Intelligent Systems Research (EIS) [3938], CAISR Centrum för tillämpade intelligenta system (IS-lab) [13650])
|Title=Identification of Gait Events using Expert Knowledge and Continuous Wavelet Transform Analysis
|PublicationType=Conference Paper
|ContentType=Refereegranskat
|Language=eng
|Journal=
|JournalISSN=
|Status=
|Volume=
|Issue=
|HostPublication=7th International Conference on Bio-inspired Systems and Signal Processing, Angers, France, March 3-6, 2014
|Conference=BIOSIGNALS
|StartPage=
|EndPage=
|Year=2014
|Edition=
|Pages=
|City=
|Publisher=
|Series=
|SeriesISSN=
|ISBN=
|Urls=
|ISRN=
|DOI=
|ISI=
|PMID=
|ScopusId=
|NBN=urn:nbn:se:hh:diva-24396
|LocalId=
|ArchiveNumber=
|Keywords=Gait Event Detection;Gait Event Identification;Wavelet Analysis;Accelerometers;Outdoor Walking;Continuous Wavelet Transform;Inertial Sensors;Expert Knowledge
|Categories=Annan medicinteknik (20699)
|ResearchSubjects=
|Projects=
|Notes=
|Abstract=<p>Many gait analysis applications involve long-term or continuous monitoring which require gait measurements to be taken outdoors. Wearable inertial sensors like accelerometers have become popular for such applications as they are miniature, low-powered and inexpensive but with the drawback that they are prone to noise and require robust algorithms for precise identification of gait events. However, most gait event detection algorithms have been developed by simulating physical world environments inside controlled laboratories. In this paper, we propose a novel algorithm that robustly and efficiently identifies gait events from accelerometer signals collected during both, indoor and outdoor walking of healthy subjects. The proposed method makes adept use of prior knowledge of walking gait characteristics, referred to as expert knowledge, in conjunction with continuous wavelet transform analysis to detect gait events of heel strike and toe off. It was observed that in comparison to indoor, the outdoor walking acceleration signals were of poorer quality and highly corrupted with noise. The proposed algorithm presents an automated way to effectively analyze such noisy signals in order to identify gait events.</p>
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|CreatedDate=2014-01-18
|PublicationDate=2014-01-18
|LastUpdated=2014-01-21
|diva=http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:688909}}
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