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CLUSTERING ANALYSIS OF DEBRIS-FLOW STREAMS

International Journal of Sediment Research 2004年第1期19卷 37-46页

作者： Yuan-Fan TSAI,Huai-Kuang TSAI,Cheng-Yan KAO Professor of Computer Science and Information Engineering National Taiwan University Taipei Taiwan Assistant Professor of Dept. of Social Studies Education National Taipei Teachers College Taipei 106 Taiwan Post doctoral fellow of Computer Science and Information Engineering National Taiwan University Taipei Taiwan

The Chi-Chi earthquake in 1999 caused disastrous landslides, which triggered numerous debris flows and killed hundreds of people. A critical rainfall intensity line for each debris-flow stream is studied to prevent such a disaster. However, setting rainfall lines from incomplete data is difficult, so this study considered eight critical factors to group streams, such that streams within a cluster have similar rainfall lines. A genetic algorithm is applied to group 377 debris-flow streams selected from the center of an area affected by the Chi-Chi earthquake. These streams are grouped into seven clusters with different characteristics. The results reveal that the proposed method effectively groups debris-flow streams.

关键词： Debris flow Genetic algorithm hierarchical clustering The Chi-Chi earthquake

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A Proposal of GA Using Symbiotic Evolutionary Viruses and its Virus Evaluation Techniques

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Journal of Advanced Computational Intelligence and Intelligent Informatics 2004年第4期8卷 421-425页

作者： Sakakura, Yoshiaki Taniguchi, Noriyuki Hoshino, Yukinobu Kamei, Katsuari Frontier Doctoral Program in Science and Engineering Ritsumeikan University Japan Graduate School of Science and Engineering Ritsumeikan University Japan Human and Computer Intelligence College Information Science and Engineering Ritsumeikan University 1-1-1 Noji-higashi Kusatsu Shiga525-8577 Japan

In this paper, we propose a Genetic Algorithm (GA) using symbiotic evolutionary viruses based on both the building block hypothesis and the virus theory of evolution. The proposed GA aims to control the destruction of building blocks by discovery, maintenance, and propagation of building blocks based on virus operation. We prepare a group of individuals and a group of viruses. The group of individuals searches for solutions and the group of viruses searches for building blocks. These searches are done based on the symbiotic relation of both groups. Also, our GA has two types of virus evaluation technique. In one type, each virus is evaluated by the difference of the fitness of an individual before and after virus infection. In the other type, all viruses are evaluated by the difference of the fitness of an individual before and after infection of all viruses. We applied the proposed GA to a minimum value search problem using a test function with some local minima far from the optimum. Finally, we also discuss the search behavior in the proposed GA based on each virus evaluation technique. © Fuji Technology Press Ltd. Creative Commons CC BY-ND: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NoDerivatives 4.0 International License (http://***/licenses/by-nd/4.0/).

关键词： Genetic algorithms

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A Moment-Based Method for Large-Scale Generalized Eigenvalue Problems

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Applied Numerical Analysis & Computational Mathematics 2004年第2期1卷

作者： Tetsuya Sakurai Hiroto Tadano Yuichi Inadomi Umpei Nagashima Department of Computer Science University of Tsukuba Tsukuba 305-8573 Japan Core Research for Evolutional Science and Technology Japan (CREST) Doctoral Program of Systems and Information Engineering University of Tsukuba Tsukuba 305-8573 Japan Grid Technology Research Center National Institute of Advanced Industrial Science and Technology Tsukuba 305-8568 Japan

In this paper we consider a method for finding several eigenvalues and corresponding eigenvectors of large-scale generalized eigenvalue problems. In this method, a small matrix pencil that has only the desired eigenvalues is derived using complex moments obtained via numerical integration. Since the process to derive the moments can be performed in parallel and we do not need to exchange data between processes, the presented method is suitable for master-worker programming models. We have implemented and tested the proposed method in a grid RPC (remote procedure call) system. Numerical examples illustrate the properties of our approach. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

关键词： Eigenvalue problems moment-based method parallel algorithm

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Global networking and universal ethics

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AI & SOCIETY 2003年第4期18卷 334-343页

作者： Brandt, Dietrich Rose, Christina Department of Computer Science in Mechanical Engineering (ZLW/IMA) University of Technology (RWTH) Aachen Germany Interdisciplinary Doctoral Programme on Global Challenges University of Tuebingen Germany

The Congress on information and Communication during the 2000 World Engineers’ Convention in Hannover, Germany, passed a document on trends, challenges, and tasks of information and communication technologies as a set of proposals and guidelines for engineers and society which assumes validity worldwide. In 2002, the Executive Board of the Association of Engineers VDI (Germany) passed the new document Fundamentals of engineering Ethics, which also claims universal validity, on how to deal with conflicting professional responsibilities. Thus the global validity of ethics, under the impact of new technologies, has become visible as an issue widely discussed within engineering, philosophy, and society. It increasingly requires the awareness of our own responsibility towards all humans, as well as towards the natural environment and future generations. Thus the questions of how to decide and how to act challenge the interdisciplinary research field of ethics more than ever. In this paper, these elements of decisions and ethics are discussed in some detail. Subsequently they are illustrated by selected examples of ethical rules.

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The Concept of Universal Ethics in Global Networking - Some Examples

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IFAC Proceedings Volumes 2003年第9期36卷 49-54页

作者： C. Rose D. Brandt Interdisciplinary Doctoral Programme on Global Challenges University of Tuebingen Home Address: Schlossstrasse 80a D-51429 Bensberg Dep of Computer Science in Mechanical Engineering (ZLW/IMA) University of Technology (RWTH) 52056 Aachen Germany

Globalisation under the impact of information and Communication Technologies requires increasingly the awareness of our own responsibility towards all humans as well as towards the natural environment and towards future generations. Thus the questions of how to decide and how to act challenge the interdisciplinary research field of Ethics more than ever. But how can different societies and social entities dealing with each other be drawn into such responsible behaviour, that means: into agreeing on one set of ethical rules? A solution to these questions may only be found through a universal ethical concept. As a philosophical solution, K.-O. Apel and J. Habermas (Frankfurt am Main, Germany) developed the concept of Discourse Ethics. It works out the basis for joint moral decisions, which are acceptable to everyone, independent from cultural, social or religious background. It claims for all communication partners to be partners on equal terms. In this paper, these elements of communication and ethics are discussed in some detail. Subsequently they are illustrated by selected examples of ethical rules suggested by different organisations.

关键词： Enterprises ethics global networks technology

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An efficient heuristic for routing and wavelength assignment in optical WDM networks

An efficient heuristic for routing and wavelength assignment...

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IEEE International Conference on Communications (ICC)

作者： Yongbing Zhang K. Taira H. Takagi S.K. Das Institute of Policy and Planning Sciences University of Tsukuba Tsukuba Ibaraki Japan Doctoral Program in Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Department of Computer Science and Engineering University of Texas Arlington TX USA

ISBN: (纸本)0780374002

We propose an efficient heuristic algorithm that sets up and releases lightpaths for connection requests dynamically. We partition the routing and wavelength assignment (commonly known as RWA) problem into two subproblems and solves both of them using a well-known shortest path routing algorithm. For solving the routing subproblem, an auxiliary graph is created whereby the nodes and links in the original network are transformed to the edges and vertices, respectively, and the availability of each wavelength on the input and output links of a node as well as the number of available wavelength converters are taken into account in determining the weights of edges. Furthermore, for solving the wavelength assignment subproblem, an auxiliary graph is also utilized and the cost for wavelength conversion is taken into consideration in the edge weight function. A distinguished feature of our algorithm is that it employs more accurate network information on the availability of both the wavelengths and the wavelength converters than the existing algorithms in deciding the routing and the wavelength assignment. Simulation results show that our algorithm performs much better than previously proposed algorithms with comparable computation time, especially when the number of wavelengths is large while the number of converters at each node is limited.

关键词： Wavelength routing Wavelength assignment Optical fiber networks WDM networks Optical wavelength conversion Partitioning algorithms Heuristic algorithms Cost function Availability Computational modeling

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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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A simple scheme of decomposition and reconstruction of continuous-time signals by B-splines

A simple scheme of decomposition and reconstruction of conti...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： K. Ichige M. Kamada R. Ishii Doctoral Prog. in Engineering University of Tsukuba Tsukuba Japan Department of Computer Information Science Ibaraki University Hitachi Japan Division of Electrical Compu. Engineering Yokohama National University Yokohama Japan

An approximate scheme is proposed for decomposing and reconstructing a continuous-time signal as a linear combination of the B-splines. It is an oversampling discrete-time implementation derived by substituting the multifold RRS functions for the B-splines. Its analysis yields conditions for the circuit parameters to avoid instability and overflow, and to meet required precision. A design example and its numerical simulation are also presented.

关键词： Spline Convolution Numerical simulation Wavelet domain Signal generators Analog circuits Costs Hardware Semiconductor device measurement Integrated circuit measurements

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Empirical testing: The prototyper's evaluation mechanism

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NAVAL ENGINEERS JOURNAL 1997年第1期109卷 41-46页

作者： Hafner, AN Arnold N. Hafner Ph.D.:is founder and president of Information Systems Research (ISR). He has twenty-five years of experience in systems development and is published in the field of systems development management. He served as corporate research scientist at Systems Exploration Inc. from 1988 to 1991 program director at Computer Science Corporation from 1983 to 1988 director of operations at Republic Management Systems Corporation from 1981 to 1983 and program manager at Computer Science Corporation from 1972 to 1981. A 1962 graduate of the US. Naval Academy he holds a doctoral degree in human behavior and engineering degrees in electronics and communications. He has taught courses on information systems and systems management at most of the colleges in the San Diego area. Dr. Hafner has presented fourteen refereed research papers while publishing sixteen articles and a book A Manager's Guide to Software System Development.

Evaluating complex systems is the subject of this paper, the third in a series investigating prototyping. It provides an interesting and helpful overview of how to evaluate systems prototypes and outlines the iterative stream of developer-user interactions that is replacing older approaches to testing and evaluating new military systems, which promise to reduce the time required to develop and field future military capabilities. Changes to the acquisition process, such as those the paper sketches, will facilitate the nation's rapid transit through its current revolution in military affairs.

关键词： Systems analysis

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A faster, cheaper and safer route to CE

World Class Design to Manufacture

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World Class Design to Manufacture 1995年第2期2卷 10-16页

作者： Stephen Evans Fiona Lettice Palminder Smart Comprehensive background in manufacturing and is currently working as a Senior Lecturer and Industrial Consultant while supervising five doctoral students and several industrial research projects. He can be contacted at the CIM Institute Cranfield University Cranfield Beds UK MK43 OAL. Tel: 01234 754073 Fax: 01234 750852. BSc Hons in technology and management science and an MSc in computer‐integrated manufacturing. She is developing her interest in concurrent engineering implementation methodologies through a PhD research programme at the CIM Institute at Cranfield. She previously spent two years working in the energy and consultancy industries. BSc Hons in social sciences and an MSc in computer‐integrated manufacturing. She has four years′ experience in production control and distribution software training consultancy. She is currently on a PhD research programme at the CIM Institute at Cranfield studying best practice concurrent engineering implementations in companies worldwide.

Describes the FAST concurrent engineering (CE) implementationmethodology that has been developed by the authors at CranfieldUniversity, through research and consultancy activities. The methodologyis presented in a paper‐based work‐book and describes three stages acompany could proceed through to take it from an initial interest in CE,to the successful implementation of a pilot CE product developmentproject and then expansion. The focus is on the introduction ofmultidisciplinary product development teams as the main vehicle forradically improving product development performance.

关键词： Concurrent engineering Implementation New product development Product development Teams

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