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Yoshio Kubota
1994 Volume 114 Issue 2 Pages
101
Published: February 20, 1994
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Norio Endo
1994 Volume 114 Issue 2 Pages
103-117
Published: February 20, 1994
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Chap. 1 Distribution Line Construction Computer Aided Design System
Kenji Imahori
1994 Volume 114 Issue 2 Pages
118-122
Published: February 20, 1994
Released on J-STAGE: December 19, 2008
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Chap. 2 Metering System with Handy Terminal
Yoshiaki Kobayashi, Nobuaki Arakawa
1994 Volume 114 Issue 2 Pages
123-128
Published: February 20, 1994
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Chap.3 Improving Customer Service
Toshio Yamane
1994 Volume 114 Issue 2 Pages
129-132
Published: February 20, 1994
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Chap. 4 Integrated distribution materials, account Processing system
Toshikazu Hatada
1994 Volume 114 Issue 2 Pages
133-137
Published: February 20, 1994
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Chap. 50 Personal Information System
Youichi Kawaguchi
1994 Volume 114 Issue 2 Pages
138-141
Published: February 20, 1994
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Chap. 6 Development of Inter-Department Integrated Information Systems
Ryoichi Nakano
1994 Volume 114 Issue 2 Pages
142-146
Published: February 20, 1994
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Chap. 7 Construction of Data Base to Control Fixed Assets
Yasunori Yamauchi
1994 Volume 114 Issue 2 Pages
147-153
Published: February 20, 1994
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Chap. 8 Work and Facilities Management System in Distribution Department
Hideaki Maruse
1994 Volume 114 Issue 2 Pages
154-157
Published: February 20, 1994
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Chap. 90 On-line Emergency Disaster Information Processing System
Akio Iyadoni
1994 Volume 114 Issue 2 Pages
158-163
Published: February 20, 1994
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Chap. 1 Business System Which Uses Satellite Communications
Kenji Imahori
1994 Volume 114 Issue 2 Pages
164-168
Published: February 20, 1994
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Chap. 2 Electric Fault H and Meteological Information Delivery System
Yuichi Kato, Susumu Sato
1994 Volume 114 Issue 2 Pages
169-173
Published: February 20, 1994
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Chap. 30 The automated input system for underground distribution facility maps
Yasuo Kawana
1994 Volume 114 Issue 2 Pages
174-178
Published: February 20, 1994
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Chap. 4 Map Information System
Isao Imamura
1994 Volume 114 Issue 2 Pages
179-183
Published: February 20, 1994
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Chap. 50 Distributed Online System for User Convenience
Keiichi Arisawa
1994 Volume 114 Issue 2 Pages
184-187
Published: February 20, 1994
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Chap. 6 Forming and Monitoring Large scale Distributed Networkds
Yukio Yamasaki
1994 Volume 114 Issue 2 Pages
188-193
Published: February 20, 1994
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Chap. 7 High-speed File Transfer System to Communicate Between Two Computer centers
Tadayuki Tachikawa
1994 Volume 114 Issue 2 Pages
194-200
Published: February 20, 1994
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Chap. 80 Connection With Control System Computer bu Open Protocol
Takayoshi Chiaki
1994 Volume 114 Issue 2 Pages
201-204
Published: February 20, 1994
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Chap. 9 Integrated Video Communication System
Masanobu Ikeda, Shojiro Tsuru
1994 Volume 114 Issue 2 Pages
205-208
Published: February 20, 1994
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Kazuo Toraichi, Takahiko Horiuchi
1994 Volume 114 Issue 2 Pages
209-216
Published: February 20, 1994
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Satoru Matsumoto
1994 Volume 114 Issue 2 Pages
217-222
Published: February 20, 1994
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Fujiwa Kato, Takao Noguchi, Tetsuji Santo, Kazufumi Kaneda, Eihachiro ...
1994 Volume 114 Issue 2 Pages
223-232
Published: February 20, 1994
Released on J-STAGE: December 19, 2008
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A preliminary inquiry on the process of work such as carrying or setting up large-sized equipments for constructing new electric power plants is indispensable for assuring efficient works and safety operations.
We have been developing a computer aided beforehand-study system which assists unexperts who has not much experience about constructions of electric power plants.
In this paper we propose an automatic search algorithm on suitable routes for carrying in electric power facilities; it works as function of the system mentioned above. In the algorithm the automatic route search algorithm for autonomous moving robots and manipulators is improved to fit the construction of electric facilities; the new algorithm can find not only one route but also some candidate routes and take care of the workers' space around the moving equipment.
The proposed algorithm has been applied for examining the process of transformer installation work in a substation.
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Mitsuru Tsukamoto
1994 Volume 114 Issue 2 Pages
233-238
Published: February 20, 1994
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This paper describes the cartographic information processing system using verbal representation. The verbal representation is a new method for representing the multi-dimensional surfaces, which human beings use for representing of topography. This method has not only advantages of representing relationship between mountains and valleys, but allows one to form a concept of shapes through a little bit of information because the relationship is represented by labels (or words).
In this paper, the words used for the verbal representation are defined in 3D space. Next, the outline of the cartographic information processing system is described. The system has two subsystems, which are shape representing subsystem and shape recognizing subsystem of topography. Each subsystem constructed some units. Finally, the recognizing process of the topography at the shape recognizing subsystem is shown.
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Tsuyoshi Nishimura, Takehiro Mori, Yasuaki Kuroe, Hideki Kokame
1994 Volume 114 Issue 2 Pages
239-244
Published: February 20, 1994
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Recently, robust absolute stability problems are argued for Lur'e systems which contain transfer functions with real parametric uncertainties. In dealing with this kind of systems, their linear parts with parameter perturbations are represented by interval plants. The Popov's theorem is known as a way of solving the classical absolute stability problem when nonlinear characteristics of Lur'e systems is time-invariant. It is recently shown that this theorem can be extended to the case where the linear plant is replaced by interval plants. The absolute stability of such systems is checked by the geometrical relation between a Popov line and the Popov loci of several extreme plants in the complex plane. However, it is restricted to the case that the lower bound of the sector equals to zero. In this paper, an extension is made so that nonlinear part has a general sector. This can be done by making the transformation for original systems and applying the Popov's theorem to the transformed systems. We show that the absolute stability of original systems can be guaranteed if we have only to check the Popov's condition for the systems transformed from several extreme plants.
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Hitoshi Kondoh, Takafumi Hosoi, Shinji Hara
1994 Volume 114 Issue 2 Pages
245-251
Published: February 20, 1994
Released on J-STAGE: December 19, 2008
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In parallel processing, it is more efficient to handle a job by decomposing it into finely-grained tasks than trying to manipulate the larger ones. However, if the tasks are finely grained, the overhead related to the synchronization of the processors and the shared memory accesses correspondently increases.
We propose an approach for reducing this overhead by constructing a parallel scheduler which considers the preparation time during plural searchings. In this scheduler, (1) the processes share two upper bounds derived by each searching, (2) the lower bound function is built taking into account the preparation time, and (3) the branching in the search tree is made by a heuristic node selection considering the node level.
An application of the proposed scheduler based on a multi-DSP system to the computation of the inverse dynamics for robot arms shows that the scheduling time can reduced to be more than twice shorter than that of the conventional scheduler, for the case of four processors.
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Kenji Iba, Liuko Kawasaki, Choujiro Kumano
1994 Volume 114 Issue 2 Pages
252-258
Published: February 20, 1994
Released on J-STAGE: December 19, 2008
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This paper presents a method for drawing power system networks using fractal technique. It is quite common to represent power systems as visual network graph. The drawing of such graph, however, was performed manually by human-hand. Automatic drawing makes possible to represent power system flexibly. The mathematical problem seems to be similar to “How to draw planar graph”. However, unlike to the planar graph problem which treats eassentially non-separable, power systems contain a few loops. Fractal graph is utilized in this paper. Our problem is defined as follows: (1) All vertex must be on the grid. All branches must be composed of horizontal or vertical line segments. The vertex that has more than 5 degree can be divided into sub-vertices. (2) Geometrical relationship between two vertices must be preserved as long as possible (In this paper, “Geometrical” means “Directional”). (3) Branches should not cross each other as long as possible. The method is applied to some practical power system networks. Although the method has some week points for grid systems, the test results show the feasibility of the proposed method.
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Analysis based on a probability distribution model
Shinji Hara, Hitoshi Kondoh, Takafumi Hosoi
1994 Volume 114 Issue 2 Pages
259-265
Published: February 20, 1994
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Acceleration anomalies in paralell branch and bound algorithms may play a key role in solving NP-complete problems. As an analytical tool to deal with these phenomena, we propose a probability distribution model. From the computational results based on this model, we verify that the acceleration anomalies are accentuated by the appropriate handling of the various node selections, and if the applied lower bound function is of poor precision, this leads to a highly effective acceleration.
We apply these ideas to the task scheduling problem for parallel processing and confirm that the better solutions can be obtained with plural search strategies.
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Yoshiharu Harada, Hiroshi Murata, Setuo Sagara
1994 Volume 114 Issue 2 Pages
266-272
Published: February 20, 1994
Released on J-STAGE: December 19, 2008
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Deadbeat control of the discrete-time systems has the specific feature that the error is settled to zero in the finite control step. But in the practical system, there exist input saturation on the control signal, and undesirable effect such as reset wind-up may be occured.
In this paper, a new design method of deadbeat control system is proposed for the plants with input saturation, and apply it to a speed control of the current type inverter induction motor. The deadbeat control signal which considers saturation limitations can be easily obtained by matrix computation. Then, the deadbeat controller not only for the series integral action but also state feedback compensation can be design by using the sequence of the control signal.
Illustrative numerical example are presented, and it is found from experimental results that the method proposed here seems to be useful for the practical system.
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Toshiro Maeda, Kiyoshi Akagi, Kaneo Mohri, Tuyoshi Uchiyama
1994 Volume 114 Issue 2 Pages
273-279
Published: February 20, 1994
Released on J-STAGE: December 19, 2008
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Analitical results of operation of magnetostrictive torque sensor were shown. A highly linear, little hysteresis and quick response torque sensor was constituted using a two-core multivibrator bridge circuit. Torque sensitivity was improved by adding two diodes between baseemitter electrodes of the two switching transistors in order to discharge the commutation capacitors. An optimal value of the magnetostrictive layer inductance was found theoretically and experimentally to realize a maximum sensitivity of torque sensing.
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Kazuhisa Matsuo, Kazuyoshi Hirakawa
1994 Volume 114 Issue 2 Pages
280-281
Published: February 20, 1994
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Seiichi Serikawa, Teruo Shimomura
1994 Volume 114 Issue 2 Pages
282-283
Published: February 20, 1994
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