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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： M. Suzuki K. Kameyama K. Toraichi K. Katagishi T. Yamamoto Master s Program in Science and Engineering University of Tsukuba Tsukuba Ibaraki Japan Institute of Information Science and Electronics. University of Tsukuba Tsukuba Ibaraki Japan Institute of History and Anthropology. University of Tsukuba Tsukuba Ibaraki Japan

Kaoh is one of historical materials which plays an important role in the field of historical document research in Japan. In the research of Kaoh,the historian must visit various places in Japan to compile them, which is a major difficulty in Kaoh research. In addition, there exist approximately 400,000 Kaohs in Japan. This paper proposes a Kaoh database system using fluency functionalized images, for the purpose of compiling the Kaoh images and sharing them among the researchers via the Internet. Fluency functionalized image is the type of image that the contours of each region in the image are approximated with fluency functions. From the experimental results, it was shown that the images kept the shape characteristics of Kaoh images even after affine-transforms, and that the data size were much smaller compared with the original bitmap images.

关键词： Database systems Image coding Shape Internet Information retrieval Image retrieval Noise shaping Image sampling Data engineering Information science

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Parallel self-organization map using multiple stimuli

Parallel self-organization map using multiple stimuli

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International Joint Conference on Neural Networks (IJCNN)

作者： M. Yasunaga K. Tominaga Jung Hwan Kim Institute of Information Sciences and Electronics University of Tsukuba Tsukuba Japan Master Program of Science and Engineering University of Tsukuba Tsukuba Japan Center for Advanced Computer Studied University of Southwestern Louisiana Lafayette LA USA

We propose a parallel SOM algorithm to speedup the fundamental SOM calculation using parallel computer environments. In the parallel SOM algorithm synaptic weights are updated in parallel corresponding to multiple stimuli (inputs). Parallelism in the proposed algorithm is based on the analogy of the biological neural networks in which neurons respond to the stimuli in parallel. Performance is evaluated by implementing the newly developed performance simulator in a personal computer-cluster under the message passing interface library (MPI) environment. A speedup ratio of about 5.0 is achieved with 8 processors (personal computers) when the width of the neighborhood function is less than 5% of the total number of neurons in the SOM network.

关键词： Biology computing Neurons Concurrent computing Parallel processing Biological neural networks Biological system modeling Computational modeling Computer simulation Computer interfaces Message passing

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Ultrasonic motor based on coupled longitudinal-bending vibrations of a diagonally symmetric piezoelectric ceramic plate

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electronics AND COMMUNICATIONS IN JAPAN PART II-electronics 1996年第6期79卷 60-67页

作者： Aoyagi, M Tomikawa, Y Faculty of Engineering Yamagata University Yonezawa Japan 992 Graduated from the Department of Electrical Engineering Yamagata University in 1989 received his Master's degree from there in 1991 and joined the Department of Electrical Engineering and Information Science of the same university as a Research Associate. He has been engaged in research and development of ultrasonic electronics. He received the Young Engineer Encouragement Award in 1994. He is a member of the Acoustical Society of Japan. Graduated from the Department of Electrical Engineering Yamagata University in 1962 and received his Ph.D. degree from the University of Tokyo in 1974. He worked at Hitachi Manufacturing K.K. from April to December 1962. He joined the Electrical Engineering Department of Yamagata University as a Research Associate in 1963 and was appointed as a Professor in November 1984. At the present he is with the Department of Electrical Engineering and Information Science. He is engaged in the research and development of electromechanical vibrators and ultrasonic electronics. He was a Visiting Scholar at UCLA from October 1975 to October 1976. He has been engaged in the research and development of ultrasonic electronics especially ultrasonic motors/actuators ultrasonic sensors and nondestructive evaluation. He received the Young Engineer Yonezawa Memorial Encouragement Award in 1971 the Ohm Award in 1971 the Encouragement Award from the Japanese Society for Nondestructive Inspection in 1986 and the Best Paper Award from the Image Sensing Technology Symposium in 1987. He is a member of the Acoustical Society of Japan the Institute of Electrical Engineers of Japan the Japan Society of Applied Electromagnetics and the Japanese Society for Nondestructive Inspection.

This paper discusses the operating principle and performance characteristics of an ultrasonic motor based on the coupled longitudinal-bending vibrations of a diagonally symmetric piezoelectric ceramic plate. It is well known that longitudinal and bending vibrations couple with each other in a diagonally symmetric piezoelectric ceramic plate. The objective of this investigation is to design a simple and thin ultrasonic motor based on these coupled mode vibrations. The design of a stator for an ultrasonic motor was optimized with respect to vibration mode, capacitance ratio, and direction of vibratory displacement by employing the finite element method. A simple ultrasonic motor was built and its performance was tested. The results indicate that its load characteristics vary widely depending on the contact point of the rotor and the geometry of a piezoelectric plate. Furthermore, attempts were made to equalize load characteristics for bidirectional operations. The efforts revealed that it is possible to equalize the rotation rate, but it is difficult to equalize efficiencies for bidirectional operations. By incorporating a self-oscillation circuit with an inverter, it is possible to nm the motor bidirectionally in a single-phase mode.

关键词： diagonally symmetric piezoelectric ceramic plate mode-coupled vibration single-phase drive reverse operation

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The figure source equation and its physical consideration

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SYSTEMS AND COMPUTERS IN JAPAN 1996年第9期27卷 83-93页

作者： Aoki, Y Iijima, T Member Japan Advanced Institute of Science and Technology Hokuriku Ishikawa Japan 923 Yasubim Aoki:graduated from the University of Kanazawa Faculty of Engineering Department of Electrical Engineering and Information Science in 1992 and received his Master's degree in 1994 from the Japan Advanced Institute of Science and Technology Hokuriku Department of Information Science where he is currently in the doctoral program engaged in research on pattern recognition. Honorary Member Taizo lijima:graduatedwith a B.E. degree from the Tokyo Institute of Technology in 1948 and received his Ph.D. degree later. He joined the Electro-Technical Laboratories in 1948 and since then has been involved in research on electromagnetic theory and pattern recognition theory image processing voice recognition and research and development of OCR. After serving as the head of Iijima Special Research Laboratories he became Professor at the Tokyo Institute of Technology in 1986. He because Professor Emeritus of that institute in 1986. He became Professor at Tokyo Engineering University and Professor Emeritus there in 1991. In 1991 he became Professor at the Japan Advanced Institute of Science and Technology and was appointed Vice President of the institute in 1992. He served successively as editor examiner secretary of general affairs inspector counsel committee-head of pattern recognition and specialized studies head of Tokyo chapter and vice president of this institute. In 1991 he became Honorary Member. He received the Paper Award from the Institute four times and the Literary Works Award once. He received the Achievement Award and the Distinguished Service Award in 1976 and 1989 respectively. He received the Purple Ribbon Medal from the Emperor in 1989.

Theoretical studies on Iijima's ''Theory of Pattern Recognition,'' which is known as a method of multiple similarity, have shown clearly that there are situations when it is difficult to determine the viewpoint and visual field, important parameters to introduce topological aspects into the pattern space, observing a figure itself. To cope with this problem, this paper proposes transforming the observed image from a figure f(r) to a second-order differential image rho(r), called ''figure source.'' The aim is to reconstruct the theory in such a way as to enable the application of similarity evaluation methods as in the conventional case, without compromising the current theory, and all the necessary proofs are given. In this paper, the figure source equation as well as rules representing its properties are developed, and several related physical quantities are redefined.

关键词： figure source determination of viewpoint and visual field second-order differential image theory reconstruction figure source equation

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Piezoelectric vibratory gyroscope as an angular velocity sensor

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electronics AND COMMUNICATIONS IN JAPAN PART II-electronics 1996年第7期79卷 40-52页

作者： Konno, M Sugawara, S Kudo, S Faculty of Science and Technology Inshinomaki Senshu University Ishinomaki Japan 986 Graduated from the Electrical Engineering Department of Tohoku University in 1946 and received his Ph.D. degree in 1951. He was appointed as an Assistant Professor at Yamagata University in 1951 and as a Professor in 1960. He retired in 1988 and joined Ishinomaki Senshu University as a Professor in 1989 and retired again in 1995. He has been engaged in the research and development of ultrasonic electronics especially of electromechanical filters and vibratory gyroscopes. He received the ECJ Inada Award in 1956 the Sato Award from the Acoustic Society of Japan in 1970 the IEEE Honorable Mention Award in 1972 the Meritorious Award from the Acoustic Society of Japan in 1991 and a Science and Technology Award from Yamagata Prefecture in 1993. He is a member of the Electrical Society of Japan and the Acoustic Society of Japan. Graduated from the Electrical Engineering Dept. Yamagata Univ. in 1970 and received his Master's degree from the same university in 1972. He received his Dr. of Eng. degree from Tohoku University in 1983. Joined Yamagata Univ. as a Research Associate in 1972 and appointed Associated Professor there in 1988. He was appointed Associated Professor at Ishinomaki Senshu Univ. in 1989. He has been engaged in the research and development of ultrasonic electronics especially of electromechanical filters and vibratory gyroscopes. He received the ECJ encouragement Award in 1979. He is a member of the Electrical Society of Japan and the Acoustic Society of Japan. Graduated from the Electrical Engineering Department Yamagata University in 1982 and received his Master's degree and Dr. of Eng. degree from Tohoku University in 1984 and 1995 respectively. He joined Yokogawa Electric in 1984 and worked also at Andes Electric prior to joining Ishinomaki Senshu University as a Research Associate in 1989. He was appointed Lecturer at the same university in 1996. He has been engaged in the research and development of u

Guidelines ate given for designing a piezoelectric vibratory gyroscope to be used as an angular velocity sensor. First, a basic equivalent circuit is given and an approximate equation is derived for sensitivity. Based on the equation, guidelines and issues related to improving sensitivity are discussed. The relationship between the output signal and difference in resonance frequencies of the driving and detecting sides is investigated for cases where the angular velocity is either constant or changing sinusoidally with time. The results are then used to determine the resonance frequencies. Furthermore, a design guideline based on an integral equivalent circuit, which has taken the effects of leakage output into consideration, is discussed and an approach is suggested for supporting the gyroscope. Finally, the performances of various gyroscopes are compared and the utility of a piezoelectric gyroscope as an angular velocity sensor is discussed.

关键词： gyroscope vibratory gyroscope angular velocity sensor Coriolis force equivalent circuit mechanical coupling

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Fabrication of SiN films at low temperature by RF biased coaxial-line microwave plasma CVD

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electronics AND COMMUNICATIONS IN JAPAN PART II-electronics 1996年第11期79卷 58-65页

作者： Morita, Y Kato, I Nakajima, T School of Science and Engineering Waseda University Tokyo Japan Received a B.S. in 1992 from the Department of Electronics and Communication Waseda University. He is now enrolled in the Ph.D. program at the same university. He has been involved in research on microwave plasma CVD. He is a member of the Japanese Society of Applied Physics. Received the B.S. and Ph.D. degrees from the Department of Electronics and Communication Waseda University in 1967 and 1973 respectively. In 1973 he joined the faculty of Waseda University becoming an associate professor in 1978. He was Visiting Professor at Manitoba University Canada in 1979–1981. He has supervised research and participated in joint research with die Canadian National Research Council. He became a professor at Waseda University in 1993. He has been involved in research on microwave plasma CVD photonics lasers electronic materials evaluation technologies photonic materials opto-quantum electronics and semiconductor dun films. He is a member of die IEE of Japan die Japan Society of Applied Physics die TV Society die Japanese Vacuum Society and IEEE. Received die B.S. from die Department of Electronics and Communication Waseda University in 1994. He is now enrolled in die master's program at die same university. He has been involved in research on microwave plasma CVD. He is a member of die Japan Society of Applied Physics.

This paper discusses the influence of ion bombardment on the characteristics of SiN films. In this study, the double-tube coaxial-line microwave plasma CVD system, which is suitable for the investigation of ion bombardment, is used to deposit SiN films. The ion bombardment energy is varied by varying the RF bias at constant ion density, As the RF bias is increased, the film density increases and the hydrogen concentration decreases, but the dangling bond density increases. The increase in the film density and decrease of hydrogen concentration are caused by the increase in film surface temperature, while the increase of the dangling bond density is caused by bond breakage due to the N+ ion implantation. When the substrate temperature is 200 degrees C and the RF bias is -175 V, the film density is 3 g/cm(3) and the hydrogen concentration is 9 at.% because of the film surface heating effect of ion bombardment acid also due to substrate heating. Substrate heating at 200 degrees C suppresses the increase in the dangling bond density. It is also demonstrated that the film surface temperature is about 200 degrees C when RF bias is -70 similar to-80 V and the substrate is unheated by any heater.

关键词： microwave plasma CVD SiN film RF bias ion bombardment effect film surface hearing effect

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ON A METHOD OF CRYPTANALYSIS FOR CRYPTOSYSTEM WITH INVOLUTION

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electronics AND COMMUNICATIONS IN JAPAN PART III-FUNDAMENTAL ELECTRONIC science 1995年第5期78卷 1-11页

作者： TSUNOO, Y OKAMOTO, E UEMATSU, T Member NEC Software Hokuriku Ltd. Ishikawa Japan 920-21 School of Information Science Japan Advanced Institute of Science and Technology Ishikawa Japan 923-12 Members Tomohiko Uyematsu graduated in Electrical Engineering from Tokyo Institute of Technology in 1982 and received a Master's degree from the same university in 1984 after whichhe became an assistant in the Electrical and Electronics Engineering Department there. In1990 he became a Lecturer and in 1991 an Assistant Professor. In 1992 he became Assistant Professor at the School of Information Science Japan Advanced Institute of Science and Technology. He holds a doctorate in engineering. Among his research interests are signal theory optical communications theory coding theory and data compression algorithms. In 1988 he received a Shinohara Commemorative Science Encouragement Prize and in 1992 a Best Paper Award. He is the author of the bookIntroduction to Record Data Compression Algorithms. He is a member of the Measurement Control Society and the Society for Information Theory and Its Applications.

Cryptology provides the technological basis for guaranteed network security. In the field of business, to guarantee the security of information, everyone needs easy-to-use cryptology. Starting with the announcement by the U.S. National Bureau of Standards of the DES cryptosystem and the proposal by NTT of the FEAL cryptosystem, secret-key cryptographic algorithms have been published, involution-type block cryptosystems which use secret key to encipher 64 bits of plain text as 64 bits of cipher text [2, 3, 9, 10, 12]. NTT has proposed the one-way function MAP, which is also an involution-type transform. In this paper, we study a new cryptanalytic method for involution-type cryptosystems and show by example that it can be applied practically in a ciphertext-only attack on the one-way function MAP. For an involution-type cryptosystem, by increasing the amount of construction in the data-randomization phase and by increasing the size of the secret key, we can guarantee the computational security by preventing the estimation of the secret key. However, if we study the properties of the function used in the design of the data-randomization phase, by specifying input/output values of the function which are independent of the secret key, it may be possible to use the inverse function [11] to calculate the secret key. This method is called the intermediate cipher method. The intermediate cipher method differs from previous methods in the small quantity of data required for breaking.

关键词： INVOLUTION BLOCK CIPHER INTERMEDIATE CIPHER CIPHERTEXT-ONLY ATTACKS

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PARALLEL AND DISTRIBUTED TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

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ADAPTIVE FINITE-ELEMENT MESH GENERATION PROGRAM FOR ELECTRON-GUN SIMULATION

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第2期8卷 109-125页

作者： XIA, S BROERS, AN Engineering Department Cambridge University Trumpington Street Cambridge CB2 1PZ U.K. Dr Shanhong Xia received her B.Sc. in electrical engineering from Tsinghua University Beijing in 1983 her M.Sc. in Electron Physics in 1986 while working at the Institute of Electronics Academia sinica Beijing and her Ph.D. from Cambridge University in 1994. She worked as a Royal Society visiting scientist at the Cambridge University Engineering Departmnet duing 1990–1991. She has worked on many aspects of electron optics including theoretical and experimental studies of lens systems and electron guns for lithography and microscopy. Following her Ph.D. she worked as a post-doctoral worker at Cambridge and has now returned to the Institute of Electronics Academia Sinica in Beijing. Alec Broers is Head of the Department of Engineering at Cambridge University and Master of Churchill College. He was educaated at Melbourne University (B.Sc. Physics and Electronics) and Cambridge University (B.A. Ph.D. Sc.D.) Engineering. After completing his Ph.D. in 1965 he spent sixteen years as a researcher at the IBM Thomas J Watson Research Center in New York. During this time he worked on the application of high resolution electron X-ray and ultra-violet light optics to microscopy and to the fabrication of microelectronic components. He held a series of management positions and was appointed an IBM Fellow in 1977. From 1980 to 1983 he worked in IBM's East Fishkill laboratory where he became responsible for the advanced development of semiconductor devices. In 1983 he was appointed to the IBM Corporate Technology Committee and subsequently became a member of IBM's Science Advisory Committee. He returned to Cambridge in 1984 where he continues his research on the fabrication of nanometre-size devices. He is a Fellow of the Royal Society the Royal Academy of Engineering the Institution of Electrical Engineers and the Institute of Physics and is a Foreign Associate of the US National Academy of Engineering.

This paper describes a computer program for generating finite element meshes for electron guns. Two new methods, the 'projection' and the 'mesh density function' methods, are used to generate the mesh. The new methods enable the mesh distribution to be set smoothly and changed easily, and also enable the mesh distribution to be adjusted according to parameters associated with the gun configuration or by feedback from the electric field calculation. The new program, which can handle a large variety of complicated electron gun structures, has been used in conjunction with the SOGUN program which has been developed by Zhu and Munro for electron gun simulation.

关键词： Computer software

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FAST CONTOUR LINE EXTRACTION ALGORITHM WITH SELECTIVE THRESHOLDING ACCORDING TO LINE CONTINUITY

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SYSTEMS AND COMPUTERS IN JAPAN 1994年第3期25卷 101-110页

作者： NISHIMURA, T FUJIMOTO, T NTT Electrical Communications Laboratories Yokosuka Japan 238 Takashi Nishmura joined the NTT Electrical Research Laboratories in 1977 after receiving a Master's degree in Science and Engineering at Waseda University. Since then he has done work in the research and development of nonimpact printers such as color ink-jet printer and electrophotographic printer. He has also worked in the area of document and image processing. Currently he is responsible for the development of the Multimedia Teleconferencing System as a Senior Manager and Senior Research Engineer working at the NTT Human Interface Laboratories. He is a member of the IEEE the ACM the Institute of Electronics Information and Communication Engineers and the Information Processing Society. Members

This paper describes a new contour fine extraction algorithm which makes better contour line continuation and accelerates processing speed. When obtaining a contour line from an original gray-scale image, the contour line extraction algorithm generally requires the following conditions: (1) extracted contour lines representing a good feature of the original image;(2) less invalid data such as noise;(3) contour line width is one pixel thickness;and (4) better contour connectedness. Many contour line extraction algorithms have been proposed. However, usually the user has employed the contour line extraction algorithm selecting by experience and a sixth sense. In the conventional method, differential operators are carried out on an original image with thresholding at a given value. Afterward, a thinning operation is carried out to obtain a one-pixel thickness contour line. However, this process takes considerable computing time because the thinning process needs recursive processing. The new algorithm presented here carries out the process which performs the edge detection and thinning operation simultaneously eliminating the extra step. The process is effectively integrated in two ways: one is maximum point extraction in the differential image;and the other is the thresholding by introducing the selection of threshold values by using observance of the contour line connectedness in the differential image. As a result, the proposed algorithm is 10 times faster than the conventional methods in processing speed, and provides almost the same quality in contour line image.

关键词： CONTOUR LINE EXTRACTION EDGE DETECTION THINNING OPERATION

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