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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： J.S. Bedi Yeongseob Kueon Yigon Kim Chang-Gyoon Lim Department of Electrical and Computer Engineering Wayne State University Detroit MI USA Instrumentation and Control Research Team POSCO Technical Research Laboratory South Korea Department of Electrical Engineering Yosu National University South Korea Department of Computer Engineering Yosu National University South Korea

We present a method of fuzzy sliding mode control for mould level, which has been a major control task in continuous casting plants. The mould level control system involves nonlinearities such as stick-slip friction in the sliding gate, time-delay, friction force variations between molten steel and the inner wall of mould, and nozzle logging/unclogging. We propose fuzzy sliding mode control technique for solving these complex problems. Fuzzy rules and membership functions for the system are created from data after training. They are used to change the slope of a sliding hyperplane to obtain faster reaching time of the system trajectory. Data were collected from the process for computer simulation. Two kinds of test were conducted to demonstrate its performance.

关键词： Fuzzy control Level control Casting Sliding mode control Steel Fuzzy systems Slabs Friction Fluctuations control systems

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A multimode thermo-optic polymer switch for incorporation in a 4/spl times/4 hybrid integrated optoelectronic switch matrix

A multimode thermo-optic polymer switch for incorporation in...

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Canadian Conference on electrical and computer engineering (CCECE)

作者： A.J.P. Hnatiw R.G. DeCorby J.N. McMullin C. Callender R.I. MacDonald Telecommunications Research Laboratory Edmonton AB Canada Department of Electrical and Computer Engineering University of Alberta Edmonton AB Canada JDS-FITEL Inc. Nepean ONT Canada

The design, fabrication and performance of a thermo-optic polymer switch are reported. A switching time of 3 ms and an ON/OFF contrast ratio of 6 dB have been experimentally measured. Improvements in device fabricatio... 详细信息

关键词： Switches Integrated optoelectronics Optical waveguides Optical attenuators Optical interferometry Optical refraction Optical variables control Optical polymers Couplers Optical wavelength conversion

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Symbolic verification of executable control specifications

Symbolic verification of executable control specifications

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IEEE International Symposium on computer Aided control System Design (CACSD)

作者： C. Banphawatthanarak B.H. Krogh K. Butts Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA USA Powertrain Control Systems Department Ford Research Laboratory Dearborn MI USA

Stateflow/sup TM/ is a MATLAB/Simulink toolbox that supports the development of executable specifications for discrete-state functions. It also supports general flowcharting of program functions. This paper describes a MATLAB program, sf2smv 2.0, that generates input for a symbolic model checking program, SMV, to verify properties of Stateflow/sup TM/ diagrams in Simulink. The SMV modules are constructed to reflect precisely the execution semantics in the simulation of Stateflow/sup TM/ diagrams. This extends previous work that created verification files that reflected an idealized version of the Stateflow/sup TM/ semantics. This paper describes how the principal Stateflow/sup TM/ execution rules are translated into SMV modules. Examples are used to illustrate the transformation procedures and their application to verify properties of executable specifications for control features in automotive powertrain control applications.

关键词： Mathematical model Power system modeling computer languages Mechanical power transmission Vehicle dynamics Trademarks control systems Automotive engineering MATLAB control system synthesis

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An adaptive channel reservation scheme for soft handoff in cellular DS-CDMA systems

An adaptive channel reservation scheme for soft handoff in c...

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IEEE Conference on Vehicular Technology (VTC)

作者： J.W. Chang D.K. Sung J.H. Ahn J.H. Kim Communication Networks Research Laboratory Department of Electrical Engineering Korea Advanced Institute of Science and Technology South Korea Electronics and Telecommunications Research Institute South Korea Center for Advanced Computer Studies University of Southwestern Louisiana USA

In DS-CDMA systems, soft handoff techniques provide seamless connections of mobile call between cells. The reserved capacity for soft handoff calls is required to sufficiently support calls in a soft handoff region. However, since the capacity required by soft handoff calls varies according to environmental factors, the conventional fixed reserved capacity can be excessive if the required channel capacity by soft handoff calls is small and this may cause a considerable amount of unnecessary blocking of new calls. We propose an adaptive channel reservation scheme which reserves channel capacity as much act necessary according to the variation of soft handoff requests. A simulation result shows that the blocking probability of new coils is reduced by 33% compared with the conventional fixed channel reservation scheme and that it is even larger as the offered load decreases or the maximum reserved capacity increases.

关键词： Multiaccess communication Time division multiple access Frequency division multiaccess Channel capacity Interference Cellular networks Quality of service Intelligent networks Communication networks Laboratories

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Preface

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) 1999年 1700卷

作者： Stadler, Rolf Stiller, Burkhard Columbia University New York United States Center for Telecommunications Research Department of Electrical Engineering 500W 120th Street New York United States Swiss Federal Institute of Technology ETH Zuurich Computer Engineering and Networks Laboratory TIK Gloriastr. 35 ZuurichCH Switzerland

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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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Multifractals in ATM traffic multiplexing

Multifractals in ATM traffic multiplexing

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Canadian Conference on electrical and computer engineering (CCECE)

作者： A. Rueda W. Kinsner Telecommunications Research Laboratory Winnipeg MAN Canada Department of Electrical and Computer Engineering University of Manitoba Canada

This paper discusses some of the issues encountered in the study of the multiplexing process in ATM. It has been observed that a self-similar process (second-order moment) describes ATM traffic fairly well. This also applies to the study of multiplexing but only in the stationary case. In the field, the traffic process is clearly non-stationary, and therefore there is a need for new analysis methodologies. We present that by observing higher-order moments it is possible to obtain a more general characterization of traffic and this can be used in the study of multiplexing.

关键词： Fractals Asynchronous transfer mode Traffic control Queueing analysis Entropy Telecommunication traffic Higher order statistics Information theory Delay effects TCPIP

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A multiuser detection scheme with pilot symbol-aided channel estimation for synchronous CDMA systems

A multiuser detection scheme with pilot symbol-aided channel...

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IEEE Conference on Vehicular Technology (VTC)

作者： M. Hosseinian M. Fattouche A.B. Sesay Telecommunications Research Laboratory Calgary AB Canada Department of Electrical and Computer Engineering University of Calgary Calgary AB Canada

A decorrelating decision-feedback detector is considered for multiuser detection for frequency-selective synchronous CDMA channels. This detector operates on the outputs of matched filters which are matched to the original code waveforms of the system. A maximum likelihood estimation to estimate parameters of the decorrelating decision-feedback filters is proposed and derived. The estimation method is based on inserting known training sequences into the information data by all users simultaneously. To achieve minimum mean-square-error (MMSE) in estimation, a criterion for how to select the training sequences is suggested. The estimation method requires a matrix inversion at the end of each training period. The simulation results show some degradations in system performance compared to the case where the perfect knowledge of the channel is assumed. This degradation is clearly due to errors in the channel estimation.

关键词： Multiuser detection Decorrelation Detectors Degradation Frequency Code division multiplexing Matched filters Maximum likelihood estimation Parameter estimation System performance

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Segmentation using multifractals for object-oriented video coding

Segmentation using multifractals for object-oriented video c...

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Canadian Conference on electrical and computer engineering (CCECE)

作者： H. Chen P. Yahampath W. Kinsner Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada Telecommunications Research Laboratory Winnipeg MAN Canada

This paper presents a study of the application of multifractal measures in the segmentation of a video sequence image for object-oriented video coding through the generalized Renyi entropy. Grey-level sequence images are analyzed from the point of view of strange attractors. Multifractal feature maps are used to extract the features from the video sequence image. The nonuniform property of the image is reflected in the singularity spectrum and the Mandelbrot spectrum. Each video-object plane (VOP) specifies a particular image sequence content and the textures in the different contents can be separated because similar textures generally will have an homogeneous property which can be characterized by the singularity and Mandelbrot dimension of the fractal sets. Consequently, we can achieve not only image segmentation, but also a separation of the video-object layers (VOLs).

关键词： Fractals Video coding Image segmentation Histograms Layout Object oriented modeling Video sequences Video compression Image processing MPEG 4 Standard

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Progressive transmission of images using wavelets: evaluation using the Renyi generalized entropy

Progressive transmission of images using wavelets: evaluatio...

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Canadian Conference on electrical and computer engineering (CCECE)

作者： R. Dansereau W. Kinsner TR Laboratories (Telecommunications Research Laboratories) Winnipeg MAN Canada Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada

This paper explores the quality of successive steps in a wavelet based progressive image transmission, using the Renyi generalized dimension D/sub q/. The Renyi generalized dimension is used to measure the multifractal complexity within an image giving us a tool for evaluating image quality other than the traditional PSNR. We apply this to a wavelet based progressive image transmission scheme through denoising, zerotree coding, and adaptive arithmetic coding to see how D/sub q/ changes as the image is reconstructed.

关键词： Entropy Image communication Image coding PSNR Fractals Noise reduction Arithmetic Image quality Energy measurement Image recognition

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