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IEEE Conference on Decision and Control

作者： P.S.C. Heuberger T.J. de Hoog P.M.J. Van den Hof Z. Szabo J. Bokor Signals Systems and Control Group Department of Applied Physics Delft University of Technnology Delft Netherlands Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

ISBN: (纸本)0780370619

Given an expansion of a dynamical system in terms of a generalized orthonormal (Hambo) basis, the problem of realizing a state-space model of minimal McMillan degree such that its first N expansion coefficients match the given ones is addressed and solved. For the solution use is made of the properties of the Hambo operator transform theory. The resulting realization algorithms can be applied in an exact and approximative sense and can also be applied to solve a related interpolation problem.

关键词： Control system synthesis Automatic control Physics automation Approximation algorithms Interpolation Transfer functions Hydrogen Finite impulse response filter Context modeling

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Design and implementation of Automatic Parallel Detection Layer

Design and implementation of Automatic Parallel Detection La...

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IEEE International Conference on systems, Man and Cybernetics

作者： M. Ahamed H. Eldeeb S. Nassar N. Bagherzadeh Computer Science Mathematics Department Faculty of Science Cairo University Cairo Egypt Electrical and Computer Engineering University of California Irvine Irvine CA USA Computer & Control Department Electronic Research Institute Head of Parallel and Distributed Systems team Cairo Egypt Chair of Electrical and Computer Engineering University of California Irvine Irvine CA USA

We develop a new software layer called the Automatic Parallel Detection Layer (APDL) for the automatic transformation from sequential to parallel code. The main interest, in this research, is the parallelism at loop level, because significant parallelism in programs almost invariably occurs in loops. The proposed APDL has five processes for code transformation: the sequential source code parser, data dependence analysis of this code, partitioning, scheduling both task and data, and generating parallel source code. Many cases have been studied to evaluate the performance of the developed layer. The performance is evaluated depending on the execution time of: the sequential code, the parallel programmer code, and the code output from APDL for the same case study. Performance results show that APDL greatly improves the execution time with respect to sequential execution time, and saves on the high cost of a parallel programmer.

关键词： Parallel processing Concurrent computing Programming profession Electronic mail Program processors distributed computing High performance computing computer science Automatic control Parallel programming

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Computing on silicon with trigger waves: experiments on CNN-UM chips

Computing on silicon with trigger waves: experiments on CNN-...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： C. Rekeczky I. Szatmari P. Foldesy Analogical and Neural Computing Systems Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Jedlik Laboratories Department of Information Technology Péter Pazmány Catholic University Budapest Hungary

ISBN: (纸本)0780366859

In this paper, experimental results on Cellular Neural Network Universal Machine (CNN-UM) chips will be presented. These analogic spatio-temporal visual microprocessors make it possible that one can use nonlinear waves as the basic kernels of algorithms solving filtering-reconstruction and/or detection-classification problems. Showing output results from series of experiments it will be demonstrated how trigger waves, the simplest nonlinear waves, can constructively be used in a number of important application areas.

关键词： Silicon Cellular neural networks Shape Active contours Laboratories Microprocessors Object detection Image reconstruction Echocardiography automation

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Taxonomy of problem management activities

Taxonomy of problem management activities

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(CSMR) European Conference on Software Maintenance and Reengineering

作者： M. Kajko-Mattsson U. Westblom S. Forssander G. Andersson M. Medin S. Ebarasi T. Fahlgren S.-E. Johansson S. Tornquist M. Holmgren Software Maintenance Laboratory Department of Computer and Systems Sciences Stockholm University and Royal Institute of Technology Kista Sweden Research AB ABB Automation Products AB and ABB Robotics AB Software Maintenance Laboratory ABB Corporate Vasteras Sweden

ISBN: (纸本)0769510280

Maintenance categories differ too much in order to be covered by one and the same generic process model. Too general process models do not give enough guidance when building process models and when measuring processes. They often invite subjectivity and imprecision. The authors suggest a detailed taxonomy of the activities for one of the processes essential within corrective maintenance: Problem Management Process. Together with other taxonomies of the processes inherent within corrective maintenance, this taxonomy should constitute a platform for defining corrective maintenance process models and an interim reference model for future measurements of corrective software maintenance.

关键词： Taxonomy Software maintenance Costs Capability maturity model Robotics and automation Laboratories Software measurement Software standards Preventive maintenance computer industry

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Sonoluminescence and phase diagrams of single bubbles at low dissolved air concentrations

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Physical Review E 2001年第2期63卷 026301-026301页

作者： G. Simon I. Csabai Á. Horváth F. Szalai Department of Atomic Physics Eötvös Loránd University H-1117 Budapest Hungary Department of Physics of Complex Systems Eötvös Loránd University H-1117 Budapest Hungary Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

We studied experimentally the dependence of light emission and phase space boundaries of air bubbles in water on the level of degassing down to low partial pressures of 15 mmHg. We found that the maximum obtainable light intensity increased monotonically by lowering the concentration of dissolved air in water. We also present a new technique to obtain the acoustic pressure (Pa) and ambient radius (R0) parameters, based on the information provided by the timing of the flashes in the acoustic cycle. Using this technique we give phase diagrams of the bubble in the (R0,Pa) and (Pa, gas concentration) space, and discuss the parametric dependence of the light intensity. The resulting power-law dependence of the relative intensity normalized by the ambient volume of the bubble on the expansion ratio indicates that more extreme conditions are attainable inside a bubble at dissolved air concentration of 15 mmHg than at 150 mmHg.

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Protected Area systems and Project Management in Protected Area systems

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IFAC Proceedings Volumes 2001年第3期34卷 195-202页

作者： Richard Clarke Georgi Dimirovski University of London School of Social and Natural Sciences Centre for European Protected Area Research 26 Russell Square London WC1B 5DQ United Kingdom FAX#: +44-171-631-6688 DOGUS University Faculty of Engineering Department of Computer Engineering Acibadem Kadikoy TR-81010 Istanbul Republic of Turkey FAX#: +90-216-327-9631 SS Cyril and Methodius University Faculty of Electrical Engineering Institute of Automation & Systems Engineering Karpos 2 BB MK-1000 Skopje Republic of Macedonia

Applications of information technology and systems engineering in the management of protected areas range from simple 'off the shelf project management and work scheduling software, to complex bespoke distributed management systems in which project management is just one element of an integrated IT system encompassing virtually every function (including administration and finance) of a large organisation. The Countryside Management System is a relatively successful system conceived 'bottom up' as a modest experiment by site managers to solve their immediate problems of project control but has significant limitations. The National Trust's Property Management and Information System in the UK is, by contrast, the most ambitious attempt to date of any conservation organisation to computerise its activities and was abandoned prior to full implementation. It seems likely to be some time before the full potential of information technologies such as Geographical Information systems can be harnessed to the management of protected sites and landscapes, yet it is a promising prospect.

关键词： Countryside management systems ecosystems management protected areas project planning control & recording

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AQUA: Query Visualization for the NCSTRL Digital Library

AQUA: Query Visualization for the NCSTRL Digital Library

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Proceedings of the 1999 4th ACM International Conference on Digital Libraries (DL'99)

作者： Kovács, László Micsik, András Pataki, Balázs MTA SZTAKI Computer and Automation Research Institute The Hungarian Academy of Sciences Department of Distributed Systems XI. Lágymáanyosi u. 11 BudapestH-1111 Hungary

AQUA is a prototype implementation of a general user interface paradigm which is capable of modelling iterative query renement and embedding several common and advanced query techniques. AQUA has been applied to the N... 详细信息

关键词： User interfaces

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A robust method for unknown forms analysis

A robust method for unknown forms analysis

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International Conference on Document Analysis and Recognition

作者： Li Xingyuan D. Doermann Weon-Geun Oh Wen Gao Department of Computer Science and Engineering Harbin Institute of Technology Harbin China Center for Automation Research University of Maryland College Park MD USA Computer Vision Laboratory Systems Engineering Research Institute Taejon South Korea

ISBN: (纸本)0769503187

This paper proposes a strategy for analyzing unknown, filled forms. First, horizontal and vertical line segments are detected, extracted and filtered. A recursive splitting and merging algorithm eliminates overlapping segments, filters false segments, and groups the segments into lines. Based on the extracted lines, an algorithm for rectangle extraction is proposed. We define the constraints between rectangles and edges. In a process of scanning the horizontal and vertical lines, candidate edges are validated and rectangles are generated if its surrounding edges and their combination are all valid. The process is recursively applied. It can tolerate large breaks in form lines, ignore irrelevant segments and deal with embedded rectangles. Experiments on a collection of forms show that our approach works well on poor quality images.

关键词： Robustness Image segmentation Data engineering computer science automation Educational institutions Machine vision systems engineering and theory Merging Lapping

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The prototype of continuous media file system, CrownFS

The prototype of continuous media file system, CrownFS

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International Conference on Information Networking

作者： Se-Jin Hwang Jin-Uok Kim Myong-Soon Park Oh-Young Kwon Tae-Geun Kim Computer Systems Laboratory Computer Science Department Korea University Seoul South Korea Distributed Computing Laboratory Network Computing Department Systems Engineering Research Institute Daejeon South Korea

ISBN: (纸本)0818672250

Currently, many multimedia or continuous media server system is under development on top of either workstations or high-end PCs clustered with high speed networking facilities. In this paper we introduce Crown, a continuous media server on clustered high performance PCs with Myrinet, fast network switching equipment, and then address CrownFS, a file system on top of Crown, to offer continuous media streams to many subscribers at the same time. For easy and rapid tuning of the performance of CrownFS, we prototyped it. Prototyping requires less efforts and costs than direct implementation. Also, more reliable system optimization is obtainable rather than simulation. By using the prototype, we measured the scalability of CrownFS according to disk access strategies.

关键词： Prototypes File systems Streaming media Network servers Personal communication networks Multimedia systems Workstations High-speed networks File servers Costs

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Performance measurements of a small-scale VOD server based on the UNIX

Performance measurements of a small-scale VOD server based o...

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： Jong Moon Sohn Gil Yong Kim Tae Geun Kim Distributed Computing Laboratory Systems Engineering Research Institute South Korea Department of Computer Engineering Pusan National University South Korea

ISBN: (纸本)0780344685

Recent progress in network technologies has made it possible to integrate digital video and audio into distributed computing environments. Among the various distributed multimedia applications, video-on-demand (VOD) services are the most typical application area. However, interest in large-scale VOD systems is gradually transferring to small and low-cost VOD systems because of the excess investment required in the transmission media. When we make a small-scale VOD system, one of the most important factors is the efficient resource management of the VOD server in order to achieve cost-effectiveness. Thus, multimedia has generated widespread interest in real-time and high-performance I/O support within general-purpose operating systems. This paper presents the performance of a small-scale, UNIX-based VOD server equipped with a real-time scheduler and a continuous media file system (CMFS). The real-time scheduler is based on the theory of non-preemptive real-time systems to test schedulability within polynomial time. To reduce interference of the interrupt processing for the real-time processes, the processes are classified into two groups in order of importance. The CMFS has been designed and implemented to acquire the performance of the raw disk. According to the analysis of the measured data, UNIX can efficiently transfer video data from disk to network and it can also guarantee most deadlines.

关键词： Measurement Real time systems Network servers distributed computing Large-scale systems Investments Resource management Multimedia systems Operating systems File servers

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