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Transactions of the Institute of Systems, Control and Information Engineers Vol. 11 (1998), No. 10

ISIJ International
belloff
ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668
Publisher: THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

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  1. Vol. 37 (2024)

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  2. Vol. 36 (2023)

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  3. Vol. 35 (2022)

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  4. Vol. 34 (2021)

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  5. Vol. 33 (2020)

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  6. Vol. 32 (2019)

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  7. Vol. 31 (2018)

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  8. Vol. 30 (2017)

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  9. Vol. 29 (2016)

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  10. Vol. 28 (2015)

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  11. Vol. 27 (2014)

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  12. Vol. 26 (2013)

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  13. Vol. 25 (2012)

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  14. Vol. 24 (2011)

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  15. Vol. 23 (2010)

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  16. Vol. 22 (2009)

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  17. Vol. 21 (2008)

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  18. Vol. 20 (2007)

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  19. Vol. 19 (2006)

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  20. Vol. 18 (2005)

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  22. Vol. 16 (2003)

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  23. Vol. 15 (2002)

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  24. Vol. 14 (2001)

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  25. Vol. 13 (2000)

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  26. Vol. 12 (1999)

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  27. Vol. 11 (1998)

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  28. Vol. 10 (1997)

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  29. Vol. 9 (1996)

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  30. Vol. 8 (1995)

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  31. Vol. 7 (1994)

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  32. Vol. 6 (1993)

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  33. Vol. 5 (1992)

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  34. Vol. 4 (1991)

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  35. Vol. 3 (1990)

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  36. Vol. 2 (1989)

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  37. Vol. 1 (1988)

    1. No.7
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    3. No.5
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Transactions of the Institute of Systems, Control and Information Engineers Vol. 11 (1998), No. 10

GuardNet : An Environment to Support Distributed Development and Execution for Communication Mechanism of Multi-Agent Systems

Motoyuki TAKAAI, Hideaki TAKEDA, Toyoaki NISHIDA

pp. 529-537

DOI:

10.5687/iscie.11.529

Abstract

In this paper, we propose a new environment that supports cooperative development of Multi-agent systems (MAS). For this purpose, we suggest a system called GuardNet. In GuardNet, which is also realized as MAS, there exists an agent called Guardant for every agent in target MAS. Guardants can store requirement specifications of their for target and relevant agents, and exchange them with each other on behalf of agent programmers. Another feature of GuardNet is agent-imitating facilities for debugging and testing. In agent-imitating, a Guardant behaves as a proxy either for the target agent or relevant agents. Using agent-imitating facilities, we can test the agent system which includes incomplete agents.

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GuardNet : An Environment to Support Distributed Development and Execution for Communication Mechanism of Multi-Agent Systems

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Ris

An Approach to Qualitative Response Model with Information Entropy

Toshimasa OZAKI, Shigeo YAMAMOTO, Nobuji MIYASAKA, Kei HARA, Eizo KINOSHITA

pp. 538-545

DOI:

10.5687/iscie.11.538

Abstract

In the Osaka bay areas, where many regional development projects have been planned and carried out, the infrastructures such as electricity and gas are being consolidated. It is necessary to make optimum design considering future demands for those utilities. Qualitative response model based on utility value is effective to estimate demands for the project under indefinite conditions, especially the Logit model is popular tool to estimate demands. However, this model does not be clarified the choice behavior of a decision-maker in its inducing process, and is called in question in the supposition. This report showed that the Logit model can be derived from information entropy without positing an extreme value distribution. Besides, this paper showed that new aggregate conception was suggested for statistical calculation and that it was verified by applying to the amusement institutions.

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An Approach to Qualitative Response Model with Information Entropy

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A Robust Face Identification against Lighting Fluctuation

Motonori DOI, Kosuke SATO, Kunihiro CHIHARA

pp. 546-553

DOI:

10.5687/iscie.11.546

Abstract

When realizing a practical face identification system, higher robustness against fluctuation of the lighting condition is required. In this paper, a new face template-matching method dedicating to facial features (eye, nose and mouth) is proposed. It uses a special template for each facial feature, which consists of sub-divided region with compensated intensity. First, the size and incline of the input face image is normalized. Secondly, the facial features are extracted and separated into some small regions. Next, the intensity values in each region are compensated according to their average and variance. Finally, the correlation coefficients between the compensated features and templates are evaluated as an identification score. Experiments with face images taken in various lighting conditions prove that the proposed method is more robust than conventional methods based on the normalized correlation coefficient.

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A Robust Face Identification against Lighting Fluctuation

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A Design Method of Fixed-Order H∞ Controllers via Bilinear Matrix Inequalities

Joe IMAE, Takashi FURUDATE

pp. 554-567

DOI:

10.5687/iscie.11.554

Abstract

In this paper, we deal with fixed-order H∞ controller design problems, based on bilinear matrix inequalities. BMI problems are nonlinear, non-differentiable and non-convex, and therefore very difficult to obtain global solutions numerically. First, we convert BMI problems into differentiable problems introducing so-called shift-parameters. Next, combining the shift-parameter scheme with quasi-Newton methods, we propose a new computational technique as BMI solvers. Lastly, we demonstrate the effectiveness of our approach by simulations, with applications to the design of fixed-order H∞ controllers.

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A Design Method of Fixed-Order H∞ Controllers via Bilinear Matrix Inequalities

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A System for Community Information Sharing using the Weak Information Structures

Harumi MAEDA, Masao KAJIHARA, Hidekazu ADACHI, Atsushi SAWADA, Hideaki TAKEDA, Toyoaki NISHIDA

pp. 568-575

DOI:

10.5687/iscie.11.568

Abstract

We first discuss the requirements for community information sharing. We then propose an information representation called weak information structures to integrate heterogeneous information such as static information (e.g. local sites information) and dynamic information created in word-of-mouth communication. The weak information structures connects various information media without defining the semantics rigorously. By leaving the interpretation of the semantics to tacit human background knowledge, it becomes compact and robust. We have developed an information sharing system for community called InfoCommon which provides people with intelligent assistance for exchanging and sharing knowledge and ideas. We have evaluated InfoCommon at the ICMAS'96 Mobile Assistant Project.

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A System for Community Information Sharing using the Weak Information Structures

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An Inverse-LQ Approach to Design of Optimal Servo System with Frequency Weights

Kazuhiro SHIODE, Yuuki KUROE, Takao FUJII, Nobuhide SUDA

pp. 576-584

DOI:

10.5687/iscie.11.576

Abstract

This paper presents a design method of optimal servo systems with frequency weights from the view point of the inverse LQ problem. This design method allows us to assign desirable closed-loop transfer functions directly and in addition, to obtain the desired optimal control law in a closed form in terms of design parameters and the system parameters. A numerical example is also shown to illustrate the design method proposed here as well as to show its usefulness.

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An Inverse-LQ Approach to Design of Optimal Servo System with Frequency Weights

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Sampled-Data H∞ and H2/H∞ Design of Multirate D/A Converter

Hideaki ISHII, Yutaka YAMAMOTO

pp. 585-592

DOI:

10.5687/iscie.11.585

Abstract

A procedure is developed to design a D/A converter via sampled-data control theory. A multirate converter with oversampling is designed to reconstruct a delayed original analog signal via H∞ and H2/H∞ design method. In spite of the multirate and delay elements, these problems are shown to be reducible to a finite dimensional discrete-time problem and furthermore to linear matrix inequality (LMI) conditions. Some numerical examples are presented to illustrate the results.

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Sampled-Data H∞ and H2/H∞ Design of Multirate D/A Converter

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