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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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PML absorbing boundary condition for noncubic cell time-domain method

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IEEE MICROWAVE AND GUIDED WAVE LETTERS 1997年第10期7卷 335-337页

作者： Harada, N Hano, M Department of Computer Science and Electronic Engineering College of Technology Tokuyama Japan Department of Electrical and Electronic Engineering Faculty of Engineering Yamaguchi University Ube Japan

Conventional absorbing boundary conditions (ABC's) are used for cubic-cell finite-difference time-domain (FDTD) grids, but not in noncubic cell time-domain grids, We propose an algorithm to apply perfectly matched layer (PML) ABC to the noncubic cell time-domain method, The numerical experiments are conducted of the accuracy of the PML in a regular triangle cell grid versus standard second-order Mur and PML ABC's in a square-cell FDTD grid, The PML global error is about 10(-3) of the former and about three times of the latter, According to the convergent characteristics this algorithm is equivalent to that of applying PML ABC to the FDTD method.

关键词： electromagnetic-held equations FDTD PML absorbing boundary conditions

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A test processor chip implementing multiple seed, multiple polynomial linear feedback shift register

A test processor chip implementing multiple seed, multiple p...

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Asian Test Symposium (ATS)

作者： Z.M. Darus I. Ahmed L. Ali Department of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia Malaysia Faculty of Computer Science and Information Technology University of Malaya Malaysia

This paper presents the design of a low cost, test processor ASIC chip implementing multiple seed, multiple polynomial linear feedback shift register (MPMSLFSR). User programmable seed and feedback connection can be set in the pattern generator of the chip to improve fault coverage. The ASIC also supports scan-path testing. It can also be used to design external IC tester.

关键词： Polynomials Feedback Circuit testing Nonlinear equations Application specific integrated circuits Test pattern generators Circuit faults Costs System testing Integrated circuit testing

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Implementation of a large Petri net by a group of Petri net controller

Implementation of a large Petri net by a group of Petri net ...

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International Conference on Industrial electronics, Control and Instrumentation

作者： T. Kamakura T. Shimoda Y. Dohi H. Murakoshi Division of Electric and Computer Engineering Faculty of Engineering Yokohama National University Yokohama Japan Department of Electronic Systmes Engineering Tokyo Metropolitan Institute of Technology Hino Tokyo Japan

The authors propose a Petri net control system to implement a large Petri net. When a large Petri net is to be implemented, it is divided into several smaller sub nets and each sub net is implemented by a Petri net controller made of LSI. So this system consists of a group of Petri net controllers and a communication controller. In order that a group of sub nets working as an original large net, it is important to keep the consistency of tokens among these sub-nets. Here, the authors present a revised Petri net controller to make a divide-and-rule system. A register, called the FCTR (fire check transition register), is added to hold fireable transition. This makes it easy for each controller to check the consistency of tokens in places shared among sub-net controllers. A new communication protocol among controllers and its hardware implementation are also proposed. The revised Petri net controller will be implemented with little increase in hardware.

关键词： Communication system control Control systems Hardware Parallel processing Large scale integration Concurrent computing Very large scale integration Protocols Process control

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A geometric learning algorithm for elementary perceptron and its convergence analysis

A geometric learning algorithm for elementary perceptron and...

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1997 IEEE International Conference on Neural Networks (ICNN 97)

作者： Miyoshi, S Nakayama, K Graduate School of Natural Science and Technology Kanazawa Univ. Kanazawa 920 240-20 Kodatsuno Japan Department of Electronic Engineering Kobe City College of Technology Kanazawa 920 240-20 Kodatsuno Japan Department of Electrical and Computer Eng. Faculty of Eng. Kanazawa Univ. Nishi-ku Kobe 651-21 t8-3 Gakuen-Higashimachi Japan

ISBN: (纸本)0780341236

In this paper, the geometric learning algorithm (GLA) is proposed for an elementary perceptron which includes a single output neuron. The GLA is a modified version of the affine projection algorithm (APA) for adaptive filters. The weights update vector is determined geometrically towards the intersection of the k hyperplanes which are perpendicular to patterns to be classified. k is the order of the GLA. In the case of the APA, the target of the coefficients update is a single point which corresponds to the best identification of the unknown system. On the other hand, in the case of the GLA, the target of the weights update is an area, in which all the given patterns are classified correctly. Thus, their convergence conditions are different. In this paper, the convergence condition of the 1st order GLA for 2 patterns is theoretically derived. The new concept ''the angle of the solution area'' is introduced. The computer simulation results support that this new concept is a good estimation of the convergence properties.

关键词： Learning algorithms

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A fast minimum cost flow algorithm for VLSI layout compaction

A fast minimum cost flow algorithm for VLSI layout compactio...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： I. Arungsrisangchai Y. Shigehiro I. Shirakawa H. Takahashi Department of Electronic Engineering King Mongkut's Institute of Technology Bangkok Thailand Department of Information Systems Engineering Faculty of Engineering Osaka University Suita Japan Department of Communication Engineering Faculty of Computer Science and System Engincering Okayama Prefectural University Japan

Since the layout compaction problem is dual to the minimum cost flow problem, flow algorithms can be applicable to the layout compaction. In this paper, an existing flow algorithm is investigated in terms of the layout compaction, and a fast flow algorithm is devised on the basis of the primal-dual method. Experimental results show that the proposed algorithm is the fastest dedicatedly for the compaction problem.

关键词： Costs Very large scale integration Compaction Constraint optimization Information systems Systems engineering and theory computer science Productivity Linear programming Constraint theory

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Channel capacity of M-ary multitrack runlength limited channels

Channel capacity of M-ary multitrack runlength limited chann...

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IEEE International Symposium on Information Theory

作者： B.V. Vasic S.W. McLaughlin O. Milenkovic Eastman Kodak (Japan) Limited Rochester NY USA School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta CA USA Faculty of Electronic Engineering University of Nis Nis Yugoslavia

We consider M-ary, multitrack runlength limited (d,k) constrained channels with and without clock redundancy. We calculate the Shannon capacities of these channels and present some simple 100% efficient codes. To compute capacity a constraint graph equivalent to the usual runlength limited constraint graph is used. The introduced graph model has a vertex labeling independent of N, the number of tracks to be written on (in parallel), which provides computational savings when the number of tracks is large. We show that increasing the number of tracks provides a significant increase of per-track capacity for more restrictive clocking, i.e. When k d.

关键词： Channel capacity Optical recording Clocks Magnetic recording Optical arrays Sparse matrices Labeling Concurrent computing Interference constraints Intersymbol interference

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Experimental study on robust force control of a flexible arm with a symmetric rigid tip body

Experimental study on robust force control of a flexible arm...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： F. Matsuno S. Umeyama S. Kasai Department of Computational Intelligence and Systems Science Interdisciplinary Graduate School of Science and Engineering Tokyo Institute of Technology Yokohama Japan Department of Computer and Systems Engineering Faculty of Engineering Kobe University Kobe Japan Department of Electronic Engineering Kobe College of Technology Kobe Japan

In this paper, an experimental study on robust control of bending and torsional vibrations and contact force of a one-link flexible arm is discussed. The flexible arm carries a symmetric rigid tip body, of which the mass center lies on the center axis of the arm. We derive dynamic equations of the joint angle, the vibrations of the flexible link, and the contact force. On the basis of a finite-dimensional modal model of a distributed-parameter system, robust controllers are constructed. Some experimental results are shown.

关键词： Robust control Force control Manipulators Vibration control Equations Orbital robotics Rotors Computational intelligence Systems engineering and theory Educational institutions

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Subspace Model Identification for Continuous-Time Systems

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IFAC Proceedings Volumes 1997年第11期30卷 1567-1572页

作者： Zi-Jiang Yang Setsuo Sagara Kiyoshi Wada Faculty of Computer Engineering and System Science Kyushu Institute of Technology Iizuka Fukuoka 820 Japan TEL +81-948-29-7672 FAX +81-948-29-7651 Department of Communication Computer Engineering Fukuoka Institute of Technology Wajirohigashi Higashiku Fukuoka 811-02 Japan Department of Electrical and Electronic Systems Engineering Graduate School of Information Science and Electrical Engineering Kyushu University Hakozaki Fukuoka 812 Japan

Usually, the subspace-based state-space system identification algorithms are focused on discrete-time models, which may cause some numerical problems when the sampling interval is small. This paper proposes an algorithm of subspace-based state-space system identification for continuous-time systems from sampled input-output data. The ω — operator ω = ( p - α)/( p + α) where p denotes a differential operator and α > 0, is introduced to avoid direct numerical differentiations. And the ω — operator state-space model identified by the 4SID method can be transformed back to the common continuous-time state-space model. The numerical superiority of the ω — operator approach compared to some other methods is verified through simulation study.

关键词： Subspace model identification continuous-time system ω—operator sampled data

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Valence Band Physics in Wurtzite GaN

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MRS Online Proceedings Library 1997年第1期468卷 445-456页

作者： T. Azuhata T. Sota S. Chichibu A. Kuramata K. Horino M. Yamaguchi T. Yagi S. Nakamura Department of Electrical Electronics and Computer Engineering Waseda University Tokyo Japan Faculty of Science and Technology Science University of Tokyo Chiba Japan Optical Semiconductor Devices Laboratory Fujitsu Laboratories Ltd. Atsugi Kanagawa Japan Faculty of Engineering Hokkaido University Sapporo Japan Research Institute for Electronic Science Hokkaido University Sapporo Japan Department of Research and Development Nichia Chemical Industries Ltd. Tokushima Japan

We present a summary of recent progress towards the understanding of the valence-band physics in wurtzite GaN. Systematic studies have been performed on the strain dependence of the free exciton resonance energies by photoreflectance measurements using well-characterized samples. Analyzing the experimental data with the Hamiltonian appropriate for the valence bands, the values have been determined of the crystal field splitting, the spin-orbit splitting, the shear deformation potential constants, and the energy gap in the unstrained crystal. Discussions are given on the strain dependence of the energy gaps, of the effective masses, and of the binding energies for the free exciton ground states as well as on the valence band parameters. Using the obtained values and the generalized Elliott formula, the fundamental optical absorption spectra obtained experimentally were analyzed. The values of the elastic stiffness constants, which play a crucial role to determine the shear deformation potential constants, are also given.

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