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Separability Conditions for Multilayer Nets Having Solutions and Convergent Superiority of Bipolar Nets

Journal of Advanced Computational Intelligence and Intelligent Informatics 2004年第6期8卷 627-632页

作者： Shiratsuchi, Hiroshi Gotanda, Hiromu Inoue, Katsuhiro Kumamaru, Kousuke Faculty of Engineering University of the Ryukyus Okinawa Nishihara903-0213 Japan Kinki University School of Humanity-Oriented Science and Engineering 11-6 Kayanomori Iizuka Fukuoka820-8555 Japan Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Fukuoka Iizuka820-8502 Japan

Separability conditions are formulated for multilayer nets to have solutions by a set of normal vectors orthogonal to separation hyperplanes. Comparing separability conditions to distributions of normal vectors with weights and biases initialized ordinarily by random numbers with a zero mean, we found that bipolar nets are superior to unipolar nets in convergence of the back propagation learning initialized in such an ordinary manner. © 2004 Fuji technology Press. All rights reserved.

关键词： Multilayers

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Relationship between Condensation Energy and Anisotropy in Bi‐2212 Superconductor

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AIP Conference Proceedings 2004年第1期711卷 627-636页

作者： T. Matsushita K. Okamura M. Kiuchi E. S. Otabe T. Yasuda S. Okayasu 1Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680‐4 Kawazu Iizuka 820‐8502 Japan 2Japan Atomic Energy Research Institute 2‐4 Shirane Tokai‐mura Naka‐gun Ibaraki 319‐1195 Japan

The condensation energy of Bi‐2212 superconductor in various doped states was evaluated from the flux pinning strength of columnar defects. For the purpose the collective flux creep theory was used to estimate the virtual critical current density in creep‐free state and the summation theory was used to estimate the elementary pinning force of the columnar defects. The values of obtained thermodynamic critical field are in the range of other observations and this proves a validity of the present evaluation. The obtained condensation energy strongly depends on the anisotropy determined by the superconductivity in the block layer. It is found that the condensation energy is drastically enhanced with decreasing temperature below the critical point.

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Fault detection of non-linear systems based on multi-form quasi-armax modeling and its application to the ship benchmark 13

Fault detection of non-linear systems based on multi-form qu...

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13th IFAC Symposium on system Identification, SYSID 2003

作者： Kumamaru, K. Inoue, K. Hosoyamada, Y. Söerström, T. Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Fukuoka Iizuka820-8502 Japan Department of Automatic Control and System Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

This paper is concerned with an application study of model-based fault detection method to a ship propulsion system. When modeling the object system, Quasi-ARMAX model with multi-model form is used. In this model, the system non-linearity is incorporated into model parameters by using non-linear non-parametric models (NNMs). Kullback discrimination Information (KDI) is introduced as fault detection index to evaluate the distortion in identified model, which is caused by a fault. The effectiveness of the method is verified through simulation studies on the ship propulsion system. © 2003 International Federation of Automatic Control.

关键词： Fault detection

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Pattern recognition of EEG signals during right and left motor imagery 13

Pattern recognition of EEG signals during right and left mot...

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13th IFAC Symposium on system Identification, SYSID 2003

作者： Inoue, Katsuhiro Pfurtscheller, Gert Neuper, Christa Kumamaru, Kousuke Department of Control Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka820-8502 Japan Department of Medical Informatics Institute of Biomedical Engineering Graz University of Technology Inffeldgasse 16a Graz8010 Austria

Electroencephalograph (EEG) recordings during right and left motor imagery can be used to move a cursor to a target on a computer screen. Such an EEG-based brain-computer interface (BCI) can provide a new communication channel to replace an impaired motor function. It can be used by e.g., handicap users with amyotrophic lateral sclerosis (ALS). In this study, statistical pattern recognition method based on AR model was introduced to discriminate the EEG signals recorded during right and left motor imagery. And learning methods (processing period for parameter estimation, AR order, etc.) were investigated. Finally, the effectiveness of our method was confirmed through the experimental studies. © 2003 International Federation of Automatic Control.

关键词： Brain computer interface

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Intelligent diagnosis method of multi-fault state for plant machinery using wavelet analysis, genetic programming and possibility theory

Intelligent diagnosis method of multi-fault state for plant ...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Peng Chen M. Taniguchi T. Toyota Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan

This paper proposes an intelligent diagnosis method for plant machinery in multi-fault state using wavelet analysis, genetic programming (GP), and possibility theory. The wavelet analysis is used to extract feature spectra of multi-fault state from measured vibration signal for the diagnosis. Excellent symptom parameters for distinguishing fault states are automatically generated by GP. Because the value of symptom parameter calculated to express the feature of the vibration signal fluctuates even if machine state does not change, fuzzy diagnosis is necessary. After obtaining the excellent symptom parameters by GP called GP-SPs, the membership functions of GP-SPs are needed for fuzzy diagnosis. We also discuss the identification method of membership function of symptom parameters using probability theory and possibility theory, and show the inference method for identifying faults types. The methods proposed in this paper are verified by applying them to the diagnosis of rolling bearing in multi-fault state.

关键词： Machine intelligence Machinery Wavelet analysis Genetic programming Possibility theory Fault diagnosis Vibration measurement Signal analysis Feature extraction Signal generators

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Fault detection of non-linear systems based on multi-form quasi-armax modeling and its application to the ship benchmark

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IFAC Proceedings Volumes 2003年第16期36卷 1047-1052页

作者： K. Kumamaru K. Inoue Y. Hosoyamada T. Söerström Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Iizuka 820-8502 Fukuoka Japan Department of Automatic Control and System Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

关键词： Fault detection Kullback discrimination information non-linear system parameter estimation quasi-ARMAX model

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Pattern recognition of EEG signals during right and left motor imagery

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IFAC Proceedings Volumes 2003年第16期36卷 139-144页

作者： Katsuhiro Inoue Gert Pfurtscheller Christa Neuper Kousuke Kumamaru Department of Control Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Department of Medical Informatics Institute of Biomedical Engineering Graz University of Technology Inffeldgasse 16a 8010 Graz Austria

关键词： EEG AR-model statistical pattern recognition brain computer interface motor imagery

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Digital-FM transmission and reception in a new wire-communication system that utilizes dc-dc converter as transmitter

Digital-FM transmission and reception in a new wire-communic...

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International Conference on Telecommunications Energy (INTELEC)

作者： A. Katsuki T. Matsumoto T. Eto Y. Hashimoto Department of Computer Science and Electronics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

In our original wire communication system that consists of low-power dc-dc converters, a converter in the powering terminal operates as not only power supply but also transmitter. Signal is transmitted by the use of output-voltage ripple. At transmission of message, the ripple is intentionally increased and modulated by the signal. Steady state and transient characteristics on FM (frequency modulation) by the way of varying the switching frequency are investigated. FSK (frequency-shift keying) is presented as an example of digital FM transmission and reception. In addition, we introduce a new electronic choke used in each terminal.

关键词： DC-DC power converters Transmitters Power supplies Wire Frequency modulation Communication system control Inductors computer science Frequency shift keying Communication switching

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Design of a remote diagnosis system for rotating machinery using virtual reality and fuzzy pattern matching

Design of a remote diagnosis system for rotating machinery u...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： M. Bellamine N. Abe K. Tanaka Peng Chen H. Taki Faculty of Computer Seimce and Engineering Technology of Technology Fukuoka Japan Faculty of Computer Science and Engineering Kyushu Institute of Technology Iizuka Fukuoka Japan Department of Environmental Science and Engineering Mie University Tsu-shi Mie Japan Wayamba University of Sri Lanka Wakayama Japan Wakayama University Wakayama-shi Wakayama Japan

This paper introduces an integrated methodology to remotely monitor and diagnose distant machines by a robot hand. Using a virtual reality environment and a teleoperation system, the vibration data are collected from different checking points. In order to pinpoint the faults, the collected data are analyzed and then using a fuzzy system the parameters of the system are estimated. Several examples of failure diagnosis verify the system efficiency.

关键词： Machinery Virtual reality Fuzzy systems Pattern matching Vibrations Orbital robotics Condition monitoring Virtual machine monitors Robot sensing systems Remote monitoring

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DGPS for Outdoor Mobile Robots by a Wireless LAN

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武汉大学学报(英文版) 2003年第2期8卷 581-586页

作者： H.Irie K.Imamura Department of Mechanical and Electrical Engineering Yatsushiro National College of Technology 2627 Hirayama-shinmachi Yatsushiro City Kumamoto 866-8501 Japan Department of Computer Science and Electronic Kyushu Institute of Technology 680-4 Kawazu Iizuka City Fukuoka 820-8502 Japan

With the cancellation of SA in 2000, the precision of GPS has been improved, widening the field of GPS applications. This range of applications includes the measurement of the position of mobile robots. Because the precision of point positioning by GPS is approximately 22mCEP, positioning such objects as automatically controlled oil tankers can be done with good results. However in the case of mobile robots the size of a human, point positioning does not provide enough precision. But with a differential system, utilization involves obtaining information through radio networks, and international agreements written into law determine the radio frequencies that are permitted for use by citizens. For that reason the selection of radio equipment is a very difficult problem for DGPS. In Japan one radio system attracting attention recently is the wireless LAN system, using IEEE802.11b. It is on the 2.4 GHz band, which is available without license, and functions on TCP/IP protocol. This report describes the experimental results of position measurement for a mobile robot using a wireless LAN to send data from a reference station to the robot. We examined what radio transmissions could be used effectively by the LAN.

关键词： DGPS reference station mobile robot wireless LAN IEEE802.11b

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