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IEEE International Symposium on Circuits and systems (ISCAS)

作者： A. Garcia U. Meyer-Base A. Lloris F.J. Taylor Dept. of Electron. & Comput. Technol. Granada Univ. Spain Department of Electronics and Computer Technology University of Granada Granada Spain High-Speed Digital Architecture Laboratory University of Florida Gainesville FL USA

Field-programmable logic (FPL) densities and performance have steadily improved, allowing DSP solutions to be integrated on a single FPL chip. The primary limitation of FPLs, in DSP-centric applications, is their intrinsically weak arithmetic performance compared to DSP microprocessors and ASICs. In some cases, distributed arithmetic (DA) has been used to mask FPL arithmetic inadequacies. The Residue Number System (RNS) has demonstrated an ability to support high-bandwidth arithmetic with limited resources. This paper presents a methodology for merging distributed arithmetic with the residue number systems to achieve high-performance FPL solutions.

关键词： Finite impulse response filter Logic Table lookup Digital signal processing Digital signal processing chips Dynamic range Field programmable gate arrays Digital arithmetic Application software Microprocessors

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Real-time Path Planning for Intelligent Robots System Based on Vision Information

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IFAC Proceedings Volumes 1999年第2期32卷 861-866页

作者： Qingchun Meng Changjiu Zhou K. Jagannathan K.S. Leong Hongbo Ji Department of Electronics & Communication Engineering of Singapore Polytechnic 139651 Tel: 65 7721440 Fax: 65 7721974. Singapore Computer Science Dept. of Yantai University 264005 Yantai China State Key Lab. of Intelligent Technology & Systems of Tsinghua University 100084 Beijing China

Real-time path planning is a key subject in the research of a Multi-robot system, such as in soccer robot system, as in such system there are several robots to coordinate to complete one task and its workspace is time-varying. There exist unpredictable changes in such workspace. These changes will make the robots path planning tremendously hard. This paper introduce the study on the real-time planning of a multi-robot system, such as soccer robots system. In such systems, as there exist multiple mobile robots, robots path planning is highly required of real-time and of high path planning quality. In this paper, the definitions of Active Obstacle and Dominating Robot are put forward. Genetic-planning and Fuzzy-correction are developed as our path planning techniques. The concept of Sector Vital Value is proposed for Genetic-planning and Fuzzy-correction. Block-Inserting strategy is employed to further improve the system's real-time performance in the workspace modelization. It takes only 2% of workspace modeling time required by Grid-modeling technique. After taking the proposed measures, the system's real-time performance is improved a lot. The initial simulation shows that our planning strategy can meet real-time demand.

关键词： Multi-agent System Path Planning Fuzzy Logic Genetic Algorithms

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Finite element based Kerr electro-optic reconstructions of space charge

Finite element based Kerr electro-optic reconstructions of s...

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Conference on Electrical Insulation and Dielectric Phenomena, (CEIDP)

作者： A. Ustundag M. Zahn Dept. of Electr. Eng. & Comput. Sci. MIT Cambridge MA USA Department of Electrical Engineering and Computer Science Laboratory for Electromagnetic and Electronic Systems Massachusetts Institute of Technology Cambridge MA USA

Recent advances in Kerr electro-optic measurement theory resulted in various promising algorithms that can reconstruct the electric field and/or space charge density from optical data. In particular the finite element based Kerr electro-optic reconstruction algorithm (FEBKER) calculates the space charge density directly to avoid the numerical problems associated with taking the gradient of the electric field, uses single parameter intensity measurements to enable transient analysis which otherwise is difficult since multiple parameter intensity measurements is slow due to the rotation of polarizers, and is capable of reconstruction even when the number of measurements are limited by the window size of the experimental set-up. In this paper we apply FEBKER to synthetic Kerr electro-optic data obtained for a point/plane electrode geometry in transformer oil with a specified space charge density distribution. The performance of the algorithm is tested. The impact of experimental error is analyzed by incorporating random error to the synthetic data. Regularization techniques that decrease the impact of experimental noise are applied.

关键词： Finite element methods Density measurement Current measurement Charge measurement Electric variables measurement Space charge Rotation measurement Particle measurements Size measurement Reconstruction algorithms

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Science and Engineering for Software Development: A Recognition of Harlan ***' Legacy 99

Science and Engineering for Software Development: A Recognit...

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1999 International Conference on Softeare Engineering

作者： Victor Basili Tom DeMarco Ali Mili Dept. of Computer Science University of Maryland College park MD The Atlantic Systems Guild 353 West 12th Street New York NY Inst. for Software Research 1000 Technology Drive Fairmont WV

This colloquium is organized in honor of Dr Harlan *** (1919-1996), and is intended to celebrate his legacy in the theory and practice of software engineering.

ISBN: (纸本)9781581130744

This colloquium is organized in honor of Dr Harlan *** (1919-1996), and is intended to celebrate his legacy in the theory and practice of software engineering.

关键词： Software design computer software Software engineering Legacy Engineering Pride Science colloquia

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Actor-based architecture for customizing and controlling agent ensembles

IEEE Intelligent Systems & Their Applications

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IEEE Intelligent systems & Their Applications 1999年第2期14卷 38-44页

作者： Jamali, Nadeem Thati, Prasannaa Agha, Gul A. Indian Institute of Technology Kanpur India Open Systems Lab. University of Illinois Urbana-Champaign IL United States Open Systems Laboratory Dept. of Computer Science Univ. Illinois at Urbana-Champaign 1304 W. Springfield Avenue Urbana IL 61801 United States

Coordinating agent behavior in agent ensembles is a key challenge for distributed artificial intelligence. A programming model that supports multiagent ensembles and a Java-based prototype systems, the AgentFoundry, are presented. Issues of agent mobility and resource access that are useful for building complex real-world multiagent systems are discussed.

关键词： Artificial intelligence

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On the existence of executions of hybrid automata

On the existence of executions of hybrid automata

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IEEE Conference on Decision and Control

作者： J. Lygeros K.H. Johansson S. Sastry M. Egerstedt Dept. of Electr. Eng. & Comput. Sci. California Univ. Berkeley CA USA Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA Division of Optimization and Systems Theory Royal Institute of Technology Stockholm Sweden

Necessary and sufficient conditions for hybrid automata to be non-blocking and deterministic (local existence and uniqueness of executions, respectively) are, developed. The problem of global existence of executions is discussed in the context of Zeno hybrid automata, that is, hybrid automata that exhibit infinitely many discrete transitions in finite time.

关键词： Automata Topology Cost accounting Extraterrestrial phenomena Sufficient conditions Control system analysis Automatic control Control system synthesis Analytical models Optimal control

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A dual mode log-periodic cavity-backed slot array

A dual mode log-periodic cavity-backed slot array

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Antennas and Propagation Society International Symposium

作者： M. Lu E. Michielssen P. Mayes P. Ingerson Dept. of Electr. & Comput. Eng. Illinois Univ. Urbana IL USA Center for Computational Electromagnetics Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign Urbana IL USA Electronics Systems and Technology Division Antenna Products Center TRW Redondo Beach CA USA

The log-periodic cavity-backed slot array (LPCBSA) is a wideband antenna that exhibits several attractive characteristics: (i) its planar structure allows it to be flush mounted on a vehicle and (ii) it is relatively easy to feed the antenna through integration with a planar circuit. This paper proposes a dual mode LPCBSA (DM-LPCBSA) which constitutes a variation on the LPCBSA that enables monopulse direction finding while maintaining the above advantages of the LPCBSA. The basic idea underlying the DM-LPCBSA is similar to that for the dual mode log-periodic dipole array: two LPCBSAs are combined together into a superstructure that can operate in sum and difference modes. This DM-LPCBSA antenna is highly suitable for wideband target identification purposes.

关键词： Broadband antennas Antenna feeds Dipole antennas Slot antennas Antenna radiation patterns Impedance Integral equations Frequency Antenna arrays Table lookup

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Healthcare Informatics Society of Ireland

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Irish Journal of Medical Science 1999年第4期168卷 276-282页

作者： Rigby, M. Sheridan, A. Draper, R. Stephens, G. Gaffney, P. Grimson, J. Avalos, G. Comerford, F. R. Kanagaratnam, B. Dineen, B. Hamilton, I. Jung, B. Felton, E. Berry, D. Grimson, W. Rice, D. H. Healy, M. Bruce, A. Kelly, J. Carroll, T. Grogan, A. Hurl, G. A. Hyland, D. Roberts, J. Brazil, J. Callanan, I. Devitt, A. O’Brien, T. O’Sullivan, U. M. Peyton, K. Wilson, M. J. Collins, R. Crawley, L. Foley, D. Strachan, H. McBrearty, P. Murnane, R. Murphy, E. Keane, V. Mulvany, F. Sweeney, P. D. Kenny, D. O’Connell, P. R. Balfe, P. Minogue, G. Centre for Health Planning & Management Keele University Keele Staffordshire Britain St. John of God Hospital Stillorgan Hospitaller Order of St. John of God Stillorgan Dept. of Computer Science Trinity College Dublin Clinical Chemistry Laboratory Tallaght Hospital Tallaght Dublin 24 Department of Experimental Medicine Faculty of Medicine National University of Ireland Galway Department of Health Promotion Faculty of Medicine National University of Ireland Galway School of Control Systems & Electrical Engineering Dublin Institute of Technology Ireland Shared Medical Systems Malvern USA Healy Services Dublin Universal Learning Systems Ltd. Dublin The Rotunda Hospital Dublin Mater Misericordiae Hospital Dublin Institute for Healthcare Informatics Dublin First Consulting Group Macclesfield Britain Virus Reference Laboratory UCD Belfield Dublin 4 Cappagh Orthopaedic Hospital Dublin Ireland Southern Health Board Cork Mater Misericordiae Hospital Dublin 7 DSS Dublin Ltd. Ireland University College Dublin Ireland Mary Aikenhead School of Nursing St. Vincent’s Hospital Dublin Blackrock Clinic Dublin Borders Community Health Services NHS Trust Britain James Connolly Memorial Hospital Blanchardstown Dublin 15 Kildare and West Wicklow Mental Health Service for People with A Learning Disability Eastern Health Board Dublin Health Research Board Dublin General Practice Research Unit The Medical Centre Dungloe Dept. of Clinical Biochemistry Our Lady’s Hospital for Sick Children Crumlin Dublin 12

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Royal Academy of Medicine in Ireland Section of Bioengineering

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Irish Journal of Medical Science 1999年第3期168卷 208-220页

作者： Lee, T. C. Shine, J. D. FitzPatrick, D. P. Bradley, J. A. O’Connor, J. J. O’Kelly, K. U. Carr, A. J. McCormack, B. A. O. O’Neill, P. Cole, J. S. Watterson, J. K. Raghunathan, S. O’Reilly, M. J. G. Pherwani, A. Rice, J. McCormack, D. Maher, S. A. Prendergast, P. J. Reid, A. J. Waide, D. V. Chambers, S. D. Bartlett, R. H. Ceccio, S. L. Murphy, L. A. Lacroix, D. Murphy, B. P. Mullett, H. Shannon, F. Lawlor, G. O’Rourke, S. K. Connolly, P. Maher, S. Devitt, A. McElwain, J. O’Reilly, P. McCarthy, D. R. Kernohan, G. Buchanan, F. J. Sim, B. Downes, S. Bennett, D. B. Orr, J. F. Dorrell, P. F. Fleming, P. Stephens, M. Moholkar, K. Fenelon, G. Doyle, A. M. Dockrell, S. Normoyle, P. Geraghty, D. MacNamara, S. Lacey, G. Lally, C. McGloughlin, T. Grace, P. Walsh, M. McGIoughlin, T. Colgan, D. Daly, S. Dolan, B. Flynn, M. J. Shuhaibar, M. Neligan, M. C. McMillan, N. D. O’Mongain, E. Walsh, J. Miller, R. Mitchell, I. O’Neill, M. Brennan, F. Ridgway, P. Blayney, A. W. Monkhouse, W. S. O’Brien, F. J. Taylor, D. Mushipe, M. T. Shelton, J. C. Revell, P. A. McCarthy, M. A. Pearse, K. M. O’Keefe, D. T. Lyons, G. M. Leane, G. E. Mulcahy, E. Bray, K. Conway, B. A. Halliday, D. M. Rosenberg, J. R. Anderson, R. Grace, P. A. Kinsella, S. M. Harrison, A. J. Lyons, D. J. Wallace, K. E. Hill, R. G. Pembroke, J. T. Brown, C. J. Hatton, P. V. Bryan, K. Buggy, M. Noe, J. M. Nico, A. C. McConnell, L. A. McGivern, R. C. Marsh, D. R. Meenan, B. J. Workman, A. Kuiper, J. H. Department of Anatomy Royal College of Surgeons in Ireland Dublin 2 Department of Mechanical and Manufacturing Engineering Trinity College Dublin 2 Division of Neuroscience and Biomedical Systems Glasgow University Glasgow Stryker Howmedica Osteonics Limerick Bioengineering Research Centre Department of Mechanical Engineering University College Dublin Department of Engineering Science University of Oxford England Bioengineering Research Centre Department of Mechanical Engineering University College Dublin Belfield Dublin 4 Department of Mechanical & Electronic Engineering Sligo Institute of Technology Co Sligo School of Aeronautical Engineering The Queen’s University of Belfast Belfast Vascular Surgery Unit Belfast City Hospital Belfast Department of Orthopaedic Surgery The Children’s Hospital Dublin 1 The Children’s Hospital Dublin 1 Department of Mechanical Engineering Trinity College Dublin 2 Tallaght Hospital Dublin 24 Bioengineering Group Dept. of Mechanical Engineering Trinity College Dublin 2 Department of Mechanical Engineering National University of Ireland Galway Department of Surgery University of Michigan Ann Arbor USA Department of Mechanical Engineering and Applied Mechanics University of Michigan Ann Arbor USA Department of Mechanical Engineering University of Dublin Ireland Department of Orthopaedic Surgery St. Vincent’s Hospital Dublin Department of Bioengineering University College Dublin Belfield Dublin Our Lady’s Hospital for Sick Children Crumlin Waterford General Hospital Co. Waterford Health Sciences University of Ulster Newtownabbey Co Antrim N. Ireland School of Mechanical and Manufacturing Engineering The Queen’s University of Belfast Belfast School of Biomedical Science The University of Nottingham Nottingham Department of Orthopaedic Surgery St. James’s Hospital Dublin 8 School of Physiotherapy University of Dublin Ireland Department of Computer Science Trinity College Dublin Ireland University of Limerick Limerick Ireland

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Some heuristics for default knowledge discovery 1st

Some heuristics for default knowledge discovery

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1st International Conference on Rough Sets and Current Trends in Computing, RSCTC 1998

作者： Jenssen, Tor-Kristian Komorowski, Jan Øhrn, Aleksander Knowledge Systems Group Dept. of Computer and Information Science Norwegian University of Science and Technology TrondheimN-7034 Norway

ISBN: (纸本)3540646558

In this paper discovery of default knowledge as proposed by Mollestad [7], [8], [9], [10] is further investigated. Mollestad’s algorithm, as described in [9], is refined and extended in several ways. In particular, new heuristics guiding the search for default decision rules are proposed and evaluated. The results so far have been encouraging when the (modified) framework is compared to other rough set methods. © Springer-Verlag Berlin Heidelberg 1998.

关键词： Rough set theory

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