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Transactions of the Institute of Systems, Control and Information Engineers Vol. 23 (2010), No. 3

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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  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)

    1. No.12
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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
    4. No.4
    5. No.3
    6. No.2
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Keyword Ranking

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Transactions of the Institute of Systems, Control and Information Engineers Vol. 23 (2010), No. 3

Optimal Resource Allocation under Fair QoS in Multi-tier Server Systems

Hirokazu Akai, Toshimitsu Ushio, Naoki Hayashi

pp. 39-45

DOI:

10.5687/iscie.23.39

Abstract

Recent development of network technology realizes multi-tier server systems, where several tiers perform functionally different processing requested by clients. It is an important issue to allocate resources of the systems to clients dynamically based on their current requests. On the other hand, Q-RAM has been proposed for resource allocation in real-time systems. In the server systems, it is important that execution results of all applications requested by clients are the same QoS(quality of service) level. In this paper, we extend Q-RAM to multi-tier server systems and propose a method for optimal resource allocation with fairness of the QoS levels of clients’ requests. We also consider an assignment problem of physical machines to be sleep in each tier sothat the energy consumption is minimized.

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Optimal Resource Allocation under Fair QoS in Multi-tier Server Systems

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Ris

Robust H∞ Performance Analysis of LTI Systems with a Single Uncertain Parameter

Yusuke Matsuda, Masato Tahara, Yoshio Ebihara, Tomomichi Hagiwara

pp. 46-55

DOI:

10.5687/iscie.23.46

Abstract

This paper addresses the robust H∞ performance analysis problem of linear time-invariant (LTI) systems whose state-space coefficient matrices depend polynomially on a single uncertain parameter. By means of a dual LMI that characterizes the H∞ performance of uncertainty-free LTI systems, we firstly formulate this analysis problem as a polynomial matrix inequality (PMI) optimization problem. However, this PMI problem is non-convex and hence intractable in general. Therefore, we apply linearization and construct an infinite sequence of relaxation problems, represented by SDPs, with theoretical guarantee of asymptotic exactness in the limit. In order to detect whether an arbitrary relaxation problem in the sequence is “exact” in the sense that it provides the same optimal value as that of the original problem, we derive a rank condition on the SDP solution under which we can conclude the exactness.

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Robust H∞ Performance Analysis of LTI Systems with a Single Uncertain Parameter

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A Position Estimation Based on Tire-Road Contact Points Considering Displacements of Two Concentric Circles on a Circular Fisheye Image

Kenichi Hirose, Takashi Toriu, Hiromitsu Hama

pp. 56-64

DOI:

10.5687/iscie.23.56

Abstract

In this paper, we propose a new method for estimating the positions on a road based on detected tire-road contact points taking the distortion on circular fisheye images into consideration. In our proposed method, we use the distortion parameters of two concentric circles composed of the inner wheel and the outer tire by considering projection system of fisheye lens, and the searching the gray scale profiles in the vertical direction are derived from each pixel that is the outline of the wheel region. The effectiveness of the proposed method is confirmed through experimental results.

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A Position Estimation Based on Tire-Road Contact Points Considering Displacements of Two Concentric Circles on a Circular Fisheye Image

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