All issues
Volume 112, Issue 5
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
Kazukito Haruki1992 Volume 112 Issue 5 Pages 277
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSDownload PDF (97K) -
Haruo Isono1992 Volume 112 Issue 5 Pages 278-284
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSDownload PDF (1532K) -
Ryuya Tanabe, Keiichiro Yasuda, Ryuichi Yokoyama1992 Volume 112 Issue 5 Pages 285-294
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSThis paper presents an efficient method which provides the optimal generation mix and the optimal generation construction process. The approximation method, in which the dynamic programming technique and gradient method are combined, is applied to determine the optimal generation mix with hydro power generation technologies. The successive approximations dynamic programming (SADP) technique, which is very suitable for high dimensional multi-stage decision process problem, is used for obtaining the optimal generation construction process. The effectiveness and feasibility of the developed technique are demonstrated on a practical power system model which has five types of generation technologies including a hydro power generation technology.View full abstractDownload PDF (1279K) -
Yoshitaka Okazaki, Yoshio Izui, Toshiaki Sakaguchi1992 Volume 112 Issue 5 Pages 295-301
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSWhen we make a design of a computer network system, it is necessary to investigate the performance of the system at steady state. In the early stage of computer system design, we have many choices and use simulations for performance analysis. We can not, however, examine system performance satisfactorily, because it takes much time to analyze all of the choices for large scale systems.
In this paper, we will present a development of a performance evaluation system “MELMATE” which use a queueing network theory. MELMATE can give us the results of analysis more than ten times faster than conventional event driven simulations. Also, MELMATE is bundled with GUI (Graphical User Interface) which makes model construction and modification much more easier. That is, we can check up every possible design of the system in a very short time and select the best one comparing with the obtained performance results. The methodology of a performance evaluation system and an example of usage will be described.View full abstractDownload PDF (920K) -
Yoshizumi Serizawa, Eiji Ohba1992 Volume 112 Issue 5 Pages 302-308
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSA reliability evaluation method has been proposed for wide-area distributed control system which consists of controller subsystems and a wide-area telecommunication network connecting those subsystems. As for a reliability evaluation measure, functional availability was adopted to take account both of reliability of controller and telecommunication network and their relationship with control function. Considering wide-area power system control, methods for calculating functional availability were provided for centralized, hierarchical and autonomous decentralized control systems concerning local control and global coordination functions. The results of functional availability evaluation for those various types of control systems characterized their essential point of system structure and reliability. By using the proposed method, unified reliability analysis for both centralized and decentralized systems can be quantitatively performed with respect to the number of hierarchical control layers, functional weight of each layer, and coordination and self-regulation functions of controllers. The method can be also basically applied to manually operated control systems.View full abstractDownload PDF (1176K) -
Kiyoshi Yoneda, Isaku Wada, Kazuhito Haruki1992 Volume 112 Issue 5 Pages 309-314
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSAn equipment planning method for production plant systems is proposed. The plant is modeled into a queueing network, which is inversely solved by a combination of approximate numerical solution algorithm for queueing networks and simulated annealing. The method is applied to planning a semiconductor production plant. Computational results are discussed.View full abstractDownload PDF (1093K) -
Katsuyuki Kamei, Yasuaki Nakamura, Shigeru Abe1992 Volume 112 Issue 5 Pages 315-321
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSIn the computer aided facility management systems for electric power equipment, the efficient data management method is required for a large number of graphic objects such as vectors, symbols, text and so on. A new hierarchical data structure called MD-tree is applied to manage the graphic data with spatial distribution in the scheduling and monitoring system of electric power lines. By this method, highly interactive and rapid man-machine interfaces can be developed. Then, installing this method to the EWS without any graphic accelerator, we can get better response performance than that of the conventional high class graphic terminals.View full abstractDownload PDF (1634K) -
Hideto Ide, Akihiko Irino1992 Volume 112 Issue 5 Pages 322-323
Published: May 20, 1992
Released on J-STAGE: December 19, 2008
JOURNAL FREE ACCESSDownload PDF (781K)
- |<
- <
- 1
- >
- >|