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Conductivity and Electrochemistry of Cobalt (II) and Dysprosium Chloride in Zinc Chloride-1-Ethyl-3-Methyl-Imidazolium Chloride Room-Temperature Molten Salt

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ECS Proceedings Volumes 2002年第1期2002-19卷

作者： Hsin-Yi Hsu Chao-Chen Yang Graduate School of Engineering Science & Technology (Doctoral Program) National Yunlin University of Science and Technology 123 University Road Sec. 3 Touliu Yunlin Taiwan 640 R. O. C.

In this present study, zinc chloride-1-ethyl-3-methylimidazolium chloride (EMIC) was used to form a room temperature melt. Although these melts are being examined for electrochemical applications, little conductivity data appears in the literature. The sequence of conductivities for the different component melts is ZnCl2-EMIC > ZnCl2-EMIC-CoCl2 > ZnCl2-EMIC-DyCl3 > ZnCl2-EMIC-CoCl2-DyCl3. The results may be explained in terms of the viscosity increase and complex formation when the cobalt chloride or dysprosium chloride is added into the acidic ZnCl2-EMIC melt. The electrochemistry of cobalt(II) and/or dysprosium chloride in acidic ZnCl2-EMIC melts at different temperature has been investigated by cyclic voltammetry. The results reveal the reduction of Dy(III) to Dy(II) or Dy(III) to Dy may have occurred, and the electrodeposition of Co-Dy or Zn-Co-Dy alloys was not formed from the melt at 80°C. Nevertheless, the cathodic reduction of Co2+/Dy3+ species will occur more readily at 110°C and 120°C than at 100°C.

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Fuzzy clustering of data with uncertainties using minimum and maximum distances based on L/sub 1/ metric

Fuzzy clustering of data with uncertainties using minimum an...

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Conference of the North American Fuzzy Information Processing Society - NAFIPS

作者： O. Takata S. Miyamoto K. Umayahara Doctoral Program in Engineering University of Tsukuba Tsukuba Ibaraki Japan Institute of Engineering Mechanics and Systems University of Tsukuba Tsukuba Ibaraki Japan School of Knowledge Science Japan Advanced Institute of Science and Technology Ishikawa Japan

Fuzzy c-means is well-known among the various methods of fuzzy cluster analysis. L/sub 1/-based fuzzy c-means has also been studied in recent years. This paper discusses the L/sub 1/-based fuzzy c-means of data with fuzzy uncertainties. The data unit is supposed to be the Cartesian product of fuzzy numbers. The metric between a data unit with uncertainty and a cluster center is defined using minimum and maximum distances. The fuzzy c-means algorithm is an alternative procedure for the optimization of the cluster center and the fuzzy set membership, while the solution of the cluster center for uncertain data cannot be obtained directly. An algorithm for the solution of cluster centers based on the L/sub 1/ metric for uncertain data is developed in this paper. Using this algorithm, an exact alternate optimization procedure is obtained. Numerical examples show that the results for uncertain data are different from the results for data without uncertainties.

关键词： Uncertainty Clustering algorithms Data engineering Knowledge engineering Optimization methods Euclidean distance Entropy Fuzzy systems Systems engineering and theory

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The frustrating search for schizophrenia genes

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American Journal of Medical Genetics Part A 2002年第1期97卷

作者： Ming T. Tsuang Stephen V. Paraone Guest Editor Dr. Tsuang is the Stanley Cobb Professor of Psychiatry Director Harvard Institute of Psychiatric Epidemiology and Genetics and Superintendent and Head Harvard Department of Psychiatry at Massachusetts Mental Health Center. He received an M.D. degree at the College of Medicine National Taiwan University and his Ph.D. at the Institute of Psychiatry Faculty of Medicine University of London. Dr. Tsuang also received a Doctor of Science (D.Sc.) in Psychiatric Epidemiology and Genetics Faculty of Science University of London. Professor Tsuang has worked throughout his career as a clinician teacher researcher and administrator in a variety of private state federal and international mental health care settings. He has been recognized both nationally and internationally for his research in schizophrenia and other major psychiatric disorders including manic-depressive illness and substance abuse. One of his areas of interest is in the rapidly developing field of research related to the interactions between genetic and environmental risk factors for severe mental disorders. Professor Tsuang is the recipient of a myriad of awards for his work among them the First Prize in Clinical Research Award from the American Academy of Clinical Psychiatrists the Rema Lapouse Award for Mental Health Epidemiology from the American Public Health Association and the Stanley Dean Award for Basic Research in Schizophrenia from the American College of Psychiatrists. He is also a Member of the Institute of Medicine National Academy of Sciences and Member Academia Sinica of Taiwan. Recently Professor Tsuang received the Lifetime Achievement Award from the International Society of Psychiatric Genetics and the Taiwanese-American Award for Achievement in Science and Engineering. He has authored or co-authored nearly 400 publications including publications in peer reviewed journals in book chapters and also in books in the areas of psychiatric epidemiology psychiatric genetics nosology of major psychoses ne

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Musical Analysis of a Computer Music Project, by Computer-Assistance, for Computer Music Applications 26

Musical Analysis of a Computer Music Project, by Computer-As...

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26th International Computer Music Conference, ICMC 2000

作者： Liu, Jian-Li Hiraga, Rumi Igarashi, Shigeru Doctoral Program in Engineering University of Tsukuba Japan Bunkyo University Japan Department of Computer Science University of Tsukuba Japan

Daphne is a computer-assisted musical analysis system that analyzes musical structure and other information necessary for computer music applications, especially for performance synthesis. The obtained analysis results are stored in a style which extends the information of a note event so that application systems can share analysis information. Providing sheets of real musical scores, Daphne’s design includes a unique function of analysis database which stores analysis result of multiple editions of a piece. Users can make use of the database to consider how performance is generated based on the interpretation of each edition. In this paper, we describe how analysis information is stored and shared among computer music applications — performance synthesis with rules, performance visualization, and automated accompaniment. © 2000 ICMC. All Rights Reserved.

关键词： Computer music

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OpenJava: A class-based macro system for Java

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1st OOPSLA Workshop on Reflection and Software engineering, OORaSE 1999

作者： Tatsubori, Michiaki Chiba, Shigeru Killijian, Marc-Olivier Itano, Kozo Doctoral Program in Engineering University of Tsukuba Tennohdai 1-1-1 Tsukuba Ibaraki Japan Department of Information Science and Electronics University of Tsukuba Japan LAAS-CNRS 7 Avenue du Colonel Roche 31077 Toulouse cedex 04 France

ISBN: (纸本)3540677615

This paper presents OpenJava, which is a macro system that we have developed for Java. With traditional macro systems designed for non object-oriented languages, it is difficult to write a number of macros typical in object-oriented programming since they require the ability to access a logical structure of programs. One of the drawbacks of traditional macro systems is that abstract syntax trees are used for representing source programs. This paper first points out this problem and then shows how OpenJava addresses this problem. A key idea of Open-Java is to use metaobjects, which was originally developed for reflective computing, for representing source programs. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Object oriented programming

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GA-based kernel optimization for pattern recognition: theory for EHW application

GA-based kernel optimization for pattern recognition: theory...

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Congress on Evolutionary Computation

作者： M. Yasunaga T. Nakamura I. Yoshihara J.H. Kim Institute Information Science and Electrical University of Tsukuba Tsukuba Ibaraki Japan Doctoral Program of Engineering University of Tsukuba Tsukuba Ibaraki Japan Miyazaki University Miyazaki Japan The Center for Advanced Computer Studies University of Louisiana Lafayette LA USA

An extension of the kernel-based pattern recognition method using a genetic algorithm is proposed. The method is suited to evolvable pattern recognition hardware using FPGAs. In the conventional method one common kernel function is used in the superposition to make discrimination functions. In the extended method each region of the kernel function is optimized individually. For the kernel-region optimization we use a genetic algorithm to solve a large combinatorial problem almost impossible to solve using any brute-force search. A chromosome represents the kernel region in an n-dimensional pattern space, and each locus corresponds to one of the candidates (genes) for an edge length of the kernel region. We have applied the extended method to a sonar spectrum recognition problem and obtained a recognition accuracy of 83.9%, which is much higher than the 62.0% obtained using the conventional kernel-based method and is also better than 82.7% obtained using the nearest neighbor method and the 83.0% obtained using a neural network (backpropagation algorithm). We have analyzed the individually optimized kernel regions and shown that the GA process automatically extracts features in the patterns and embeds the features in the kernel regions.

关键词： Kernel Pattern recognition Genetic algorithms Hardware Field programmable gate arrays Optimization methods Biological cells Sonar applications Nearest neighbor searches Neural networks

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Improving LIFS image coding via extended condensations

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Systems and Computers in Japan 1999年第5期30卷 1-8页

作者： You, Hyunbea Takahashi, Takashi Hasegawa, Yuki Tokunaga, Ryuji Doctoral Program in Engineering University of Tsukuba Tsukuba 305-8573 Japan College of Information Science University of Tsukuba Tsukuba 305-8573 Japan Inst. of Info. Sci. and Electronics University of Tsukuba Tsukuba 305-8573 Japan

Local iterated function system (LIFS) image coding is currently a main topic of fractal image coding and is being studied from various points of view. However, its performance is still inferior to conventional schemes such as JPEG. This paper proposes a novel local transformation called extended condensation and reports that the LIFS coding scheme is significantly improved by combining the technique with Ida's average separation scheme. When the compression ratio is high, a better decoded image is acquired by the proposed scheme than by JPEG.

关键词： Image coding

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Emulation facility for data-driven real-time multi-processing 2nd

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2nd International Symposium on High Performance Computing, ISHPC 1999

作者： Urata, Takuji Nishikawa, Hiroaki University of Tsukuba Doctoral Program in Engineering Tsukuba Science City Ibaraki305-8573 Japan University of Tsukuba Institute of Information Sciences and Electronics Tsukuba Science CityIbaraki305-8573 Japan

ISBN: (纸本)3540659692

Minimizing overhead resulting from context switching is a prerequisite for effective real-time multi-processing. Our heterogeneous data-driven processor has shown its multi-processing capability without extending turn-around time of any process as long as enough processing resource is available. However, the heterogeneous multi-processor system connected by a non-uniform network can yield bottlenecks that prevent it from meeting performance requirements unless program allocation is optimized during preprocessing. To avoid overload at the bottlenecks, we need a prototyping scheme to verify each processor's load. This paper discusses an emulation facility for an elastic pipeline structure. To effective emulate our data-driven processor, fine-grained parallel processing is required because the elastic pipeline structure makes up an autonomous processor without a centralized clock. By testing our data-driven processor used as an emulation facility to emulate fine-grained pipeline parallelism, we show its effectiveness. © 1999, Springer-Verlag. All rights reserved.

关键词： Pipelines

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A new estimation formula for minimum filter length of optimum FIR digital filters

A new estimation formula for minimum filter length of optimu...

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International Conference on Signal Processing Proceedings (ICSP)

作者： K. Ichige M. Iwaki R. Ishii Doctoral Program in Engineering University of Tsukuba Tsukuba Ibaraki Japan Japan Advanced Institute of Science and Technology Tatsunokuchi Ishikawa Japan Division of Electrical and Computer Engineering Yokohama National University Yokohama Japan

This paper presents an accurate estimation formula for the minimum filter length of optimum (the minimax criterion-based) FIR low-pass digital filters. The authors have proposed an accurate estimation formula for the particular case that the passband and stopband ripples are identical. Now we expand the formula for the general case. The accuracy of the proposed formula is evaluated in comparison with that of the conventional formulae. We also describe how to apply the proposed formula for the design of other types of filters.

关键词： Digital filters Finite impulse response filter Low pass filters Design optimization Algorithm design and analysis Iterative algorithms Passband Cutoff frequency Minimax techniques Iterative methods

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A New Estimation Formula for Minimum Filter Length of Optimum FIR Digital Filters

A New Estimation Formula for Minimum Filter Length of Optimu...

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1998 Fourth International Conference Signal Processing

作者： Koichi Ichige Mamoru Iwaki Rokuya Ishii Doctoral Program in Engineering University of TsukubaTsukubaIbaraki 305-8573Japan Japan Advanced Institute of Science and Technology TatsunokuchiIshikawa 923-1292Japan Division of Electrical and Computer Engineering Yokohama National UniversityYokohama 240-8501Japan

This paper presents an accurate estimation formula for the minimum filter length of optimum(the minimax criterion based) FIR low-pass digital *** authors have proposed an accurate estimation formula for the particular case that the passband and stopband ripples are *** we expand the formula for the general *** accuracy of the proposed formula is evaluated in comparison with that of the conventional *** is also described how to apply the proposed formula for the design of other types of filters.

关键词： FIR A New Estimation Formula for Minimum Filter Length of Optimum FIR Digital Filters Filter

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