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9th European Signal Processing Conference, EUSIPCO 1998

作者： Beligiannis, G.N. Berketis, K.G. Fotakis, D.A. Likothanasis, S.D. Department of Computer Engineering and Informatics University of Patras Rion Patras265 00 Greece Computer Technology Institute Kolokotroni 3 Patras262 21 Greece Department of Mathematics University of the Aegean Karlovassi832 00 Greece

It is known that for the adaptive filtering problem, the Multi Model Adaptive Filter (MMAF) based to the Partitioning Theorem is the best solution. It is also known that Genetic Algorithms (GAs) are one of the best methods for searching and optimization. In this work a new method, concerning multivariable systems, which combines the effectiveness of MMAF and GAs' robustness has been developed. Specifically, the a-posteriori probability that a specific model, of the bank of the conditional models, is the true model can be used as fitness function for the G A. Although the parameters' coding is more complicated, simulation results show that the proposed algorithm succeeds better estimation of the unknown parameters compared to the conventional MMAF, even in the case where it is not included in the filters bank. Finally, a variety of defined crossover and mutation operators is investigated in order to accelerate algorithm's convergence.

关键词： Adaptive filters

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Novel single and double output TSC Berger code checkers

Novel single and double output TSC Berger code checkers

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VLSI Test Symposium

作者： X. Kavousianos D. Nikolos Computer Technology Institute University of Patras Patras Greece Department of Computer Engineering and Informatics University of Patras Patras Greece

This paper presents a novel method for designing type-I and type-II single and double output TSC Berger code checkers taking into account a realistic fault model including stuck-at, transistor stuck-open, transistor stuck-on, resistive bridging faults and breaks. A benefit of the proposed type-I single and double output checkers is that all faults are testable by a very small set of code words the number of which does not increase with the information length, that is, the checkers are C-testable. The proposed double output checkers are two-times faster than the corresponding single output checkers, but require for their implementation twice as many transistors as the single output checkers. The proposed single output checkers are the first known TSC Berger code checkers in the open literature, while the type-I single output checkers are near optimal with respect to the number of the transistors required for their implementation. The checkers of this paper with either, single or double output are significantly more efficient, with respect to the implementation area and speed than the already known from the open literature Berger code checkers.

关键词： Circuit faults Design methodology Encoding Testing Design engineering informatics Electronic mail Birth disorders Built-in self-test Very large scale integration

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The global efficiency of distributed, rate-based, flow control algorithms 98

The global efficiency of distributed, rate-based, flow contr...

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Proceedings of the seventeenth annual ACM symposium on Principles of distributed computing

作者： Panagiota Fatourou Marios Mavronicolas Paul Spirakis Department of Computer Engineering and Informatics University of Patras Patras Greece & Computer Technology Institute Patras Greece Department of Computer Science University of Cyprus Nicosia Cyprus

No abstract available.

ISBN: (纸本)9780897919777

No abstract available.

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A CORBA-based integration of distributed electronic healthcare records using the synapses approach

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IEEE Transactions on Information technology in Biomedicine 1998年第3期2卷 124-138页

作者： Crimson, Jane Crimson, William Berry, Damon Stephens, Gaye Felton, Eoghan Kalra, Dipak Toussaint, Pieter Weier, Onno W. Department of Computer Science Trinity College Dublin 2 Ireland Faculty of Engineering Dublin Institute of Technology Dublin Ireland Centre for Health Informatics and Multiprofessional Education University College N19 5NF London United Kingdom

The ability to exchange in a meaningful secure and simple fashion relevant healthcare data about patients is seen as vital in the context of efficient and cost-effective shared or team-based care. The electronic healthcare record (EHCR) lies at the heart of this information exchange and it follows that there is an urgent need to address the ability to share EHCR's or parts of records between carers and across distributed health information systems. This paper presents the Synapses approach to sharing based on a standardized shared record the Federated Healthcare Record which is implemented in an open and flexible manner using the Common Object Request Broker Architecture (CORBA). The architecture of the Federated Healthcare Record is based on the architecture proposed by the Technical Committee 251 of the European Committee for Standardization. © 1998 IEEE.

关键词： Common object request broker architecture (corba) Distributed information systems Electronic healthcare records (ehcr's) Health informatics Open systems

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Precise control of instruction caches

Precise control of instruction caches

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International Conference on High Performance Computing

作者： M. Smirli D. Lioupis K. Kissell Department of Computer Engineering & Informatics University of Patras Greece Computer Technology Institute Patras Greece Silicon Graphics Core Technology Group Cortaillod Switzerland

Instruction caches are usually designed to fetch the whole block from memory in case of a miss. However, the fetched blocks might contain branch instructions which if taken, will render the rest of the block useless. A novel approach is introduced, namely the Precise Control, which fetches only the words of a cache block that are likely to be used. The performance of Precise Control is evaluated and it is shown that it has a positive influence on system performance. Precise Control reduces the words fetched from memory by up to 60%, thus reducing significantly the communication overhead between cache and main memory as well as the total execution time.

关键词： Delay System performance Prefetching Communication system traffic control informatics Silicon computer graphics computer aided instruction Capacitive sensors Hardware

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“Dynamic-fault-prone BSP”: a paradigm for robust computations in changing environments 98

“Dynamic-fault-prone BSP”: a paradigm for robust computati...

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Proceedings of the tenth annual ACM symposium on Parallel algorithms and architectures

作者： Spyros C. Kontogiannis Grammati E. Pantziou Paul G. Spirakis Moti Yung Computer Engineering and Informatics Department Patras University 26500 Rion Patras Greece and Computer Technology Institute Kolokotroni 3 26221 Patras Greece Computer Technology Institute Kolokotroni 3 26221 Patras Greece Certco 55 Broad St. 22nd suite New York NY

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Total least squares 3-D motion estimation

Total least squares 3-D motion estimation

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IEEE International Conference on Image Processing

作者： K.I. Diamantaras T. Papadimitriou M.G. Strintzis M. Roumeliotis Department Applied Informatics Educational Technology Lab University of Macedonia Thessaloniki Greece Educational Technology Lab University of Macedonia Thessaloniki Greece DepartmentElectrical and Computer Engineering Aristotle University of Thessaloniki Thessaloniki Greece Department of Informatics Technological Education Institute Sindos Thessaloniki Greece

A new method for estimating 3D motion parameters from point correspondences is presented in this paper. The problem formulation leads to the solution of an overdetermined linear system of equations. The total least squares (TLS) method is found to be the most suitable one for estimating the solution since our model includes noise both in the observation data and in the system matrix. The translation parameters are obtained immediately from the above solution whereas the rotation parameters are estimated from the solution of another TLS problem. Tests of our method on artificial data and on real images show its robustness against Gaussian additive noise and against digitalization noise introduced by finite pixel resolution.

关键词： Least squares approximation Motion estimation Parameter estimation Additive noise Linear systems Equations Testing Noise robustness Gaussian noise Pixel

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Royal Academy of Medicine in Ireland - Section of Bioengineering - Proceedings of meeting held in Dundalk, Co. Louth, in February 1998.

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IRISH JOURNAL OF MEDICAL SCIENCE 1998年第4期167卷 256-276页

作者： [Anonymous] Orthopaedic Research Unit The Queen’s University of Belfast School of Biomedical Sciences The Queen’s University of Belfast Howmedica International Ltd. Raheen Industrial Estate Limerick Department of Mechanical Engineering Trinity College Dublin 2 Mater Hospital Dublin 7 Orthopaedic Research Laboratory Århus University Hospital Denmark University of Limerick Limerick Limerick Regional Hospital Raheen Limerick Boston Scientific Ireland Ltd. Galway Department of Mechanical Engineering University College Dublin Dublin Department of Electrical and Electronic Engineering University College Dublin Dublin Bioengineering Research Centre Department of Mechanical Engineering University College Dublin Dublin Northern Ireland Bio-Engineering Centre (NIBEC) School of Electrical and Mechanical Engineering University of Ulster Newtownabbey Department of Mechanical & Manufacturing Engineering The Ashby Building The Queen’s University of Belfast Johnson and Johnson Professional Orthopaedic Division Queensway England Department of Cardiology and Department of Medical Physics & Bioengineering St. James’s Hospital Dublin 8 Burke House Ellison Street Castlebar Royal College of Surgeons in Ireland Department of Surgery Beaumont Hospital Dublin Department of Electronic and Electrical Engineering Trinity College Dublin 2 Department of Aeronautical Engineering The Queen’s University of Belfast Vascular Unit Belfast City Hospital Department of Medical Physics and Bioengineering St. James’s Hospital Dublin 8 Centre for Biomedical Electronics Department of Electronic and Computer Engineering University of Limerick Limerick Department of Mechanical and Aeronautical Engineering University of Limerick Limerick School of Health Sciences University of Ulster Ireland School of Physiotherapy University of Ulster Newtownabbey Clinical Engineering NI Medical Physics Agency Belfast and Radiology Royal Victoria Hospital Musgrave Park Hospital University of Limerick Biomedical Institute (ULBMI) Uni

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Problem formulation for multi-criteria decision analysis: Report of a workshop

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Journal of Multi-Criteria Decision Analysis 1998年第5期7卷 242-262页

作者： French, Simon Simpson, Lisa Atherton, Elizabeth Belton, Valerie Dawes, Robyn Edwards, Ward Hämäläinen, Raimo P. Larichev, Oleg Lootsma, Freerk Pearman, Alan Vlek, Charles School of Informatics University of Manchester Manchester M13 9PL Coupland 1 Oxford Road United Kingdom School of Computer Studies University of Leeds Leeds United Kingdom Department of Management Science University of Strathclyde Strathclyde United Kingdom Department of Social and Decision Sciences Carnegie-Mellon University Pittsburgh PA United States Departments of Psychology and of Industrial and Systems Engineering University of Southern California CA United States Department of Systems Engineering Helsinki University of Technology Helsinki Finland Institute for Systems Analysis Russian Academy of Sciences Moscow Russian Federation Department of Mathematics Technical University of Delft Delft Netherlands Leeds University Business School Leeds University Leeds LS2 9JT United Kingdom Department of Psychology University of Groningen Groningen Netherlands

This paper reports on a workshop on Problem Formulation in Multi-Criteria Decision Analysis held at SPUDM97. The focus of the workshop was the problem formulation phase which occurs between the analyst meeting a person with a ‘mess’ and the time he or she begins to analyse a structured problem with several alternatives scored against several attributes or criteria. The objectives were: to share experience on procedures which might be transferable between the methodologies;to demonstrate different skills used by the analyst in structuring decision problems;and to catalyse a discussion on the problem formulation phase of an analysis. Three analysts, who generally approach problems using multiattribute methods, addressed the same problem. The problem used was constructed to be realistic to three decision makers, who had been trained in the issues of concern. There were two sessions. Each analyst was assigned a decision maker and formulated the problem independently in the first session, held in parallel. They were each observed by two observers and many of the audience at the workshop. The three formulations were presented along with the comments of the observers and discussed at a second plenary session. This paper reports the three formulations and observations, remarking on the ‘tricks of the trade’ employed by the analysts in formulating the problem. The analysts also describe their thinking and their aims in adopting their approach and style of interaction. More general remarks on the process of decision analysis are also offered. © 1998 John Wiley & Sons, Ltd.

关键词： Multi-criteria decision analysis (MCDA) Problem formulation Process of decision analysis

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The consensus glossary of temporal database concepts - february 1998 version

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 1998年 1399卷 367-405页

作者： Jensen, Christian S. Dyreson, Curtis E. Bohlen, Michael Clifford, James Elmasri, Ramez Gadia, Shashi K Grandi, Fabio Hayes, Pat Jajodia, Sushil Käfer, Wolfgang Kline, Nick Lorentzos, Nikos Mitsopoulos, Yannis Montanari, Angelo Nonen, Daniel Peressi, Elisa Pernici, Barbara Roddick, John F Sarda, Nandlal L Scalas, Maria Rita Segev, Arie Snodgrass, Richard T Soo, Mike D. Tansel, Abdullah Tiberio, Paolo Wiederhold, Gio Aalborg University Department of Computer Science Fredrik Bajers Vej 7E Aalborg ØDK-9220 Denmark Computer Science Dept Aalborg University Denmark Computer Science Dept James Cook University Australia Computer Science Engineer¬ing Dept University of Texas at Arlington United States Computer Science Dept Iowa State University United States CIOC-CNR DEIS University of Bologna Italy Beckman Institute United States In¬formation and Software Systems Engineering Dept George Mason University United States Mercedes Benz Agricultural University of Athens Greece Informatics Laboratory Agricultural University of Athens Greece Infor¬matics Laboratory Agricultural University of Athens Greece Dip. di Matematica e Informatica Universita di Udine Italy Computer Science Dept Concordia University Canada Dip. di Matematica e Informatica Universita di Udine Italy Electronic Engineering and Information Sciences Dept Politecnico di Milano Italy School of Computer and Information Science University of South Australia Australia Computer Science and Engineering Dept Indian Institute of Technology Bombay India University of Bologna Italy School of Business Adm. and Computer Science Research Dept University of California United States Computer Science Dept Uni¬versity of Arizona United States Computer Science and Engineering Dept University of South Florida United States Bernard M. Baruch College City University of New York United States CIOC-CNR DEIS University of Bologna Italy Computer Science Dept Stanford University United States

This document1 contains definitions of a wide range of concepts specific to and widely used within temporal databases. In addition to providing definitions, the document also includes explanations of concepts as well as discussions of the adopted names. The consensus effort that lead to this glossary was initiated in Early 1992. Earlier versions appeared in SIGMOD Record in September 1992 and March 1994. The present glossary subsumes all the previous documents. The glossary meets the need for creating a higher degree of consensus on the definition and naming of temporal database concepts. Two sets of criteria are included. First, all included concepts were required to satisfy four relevance criteria, and, second, the naming of the concepts was resolved using a set of evaluation criteria. The concepts are grouped into three categories: concepts of general database interest, of temporal database interest, and of specialized interest. © Springer-Verlag Berlin Heidelberg 1998.

关键词： Database systems

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