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121 巻, 1 号
選択された号の論文の62件中51～62を表示しています
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小山 雅也, 五百旗頭 正2001 年 121 巻 1 号 p. 218-221
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーThe synthetic quartz is used as oscillater and filter in various places and fields. The synthetic quartz is raised using the autoclave. An autoclave is oblong and cylindrical furnace. Inside of it becomes high tem-perature and pressure, and it is not possible to observe the condition of inside. Therefore, the period of the end has been decided by the intuition of the expert. To judge the end of rearing, we use trajectory parallel measure that was a method for applying the chaos.抄録全体を表示PDF形式でダウンロード (824K) -
秋葉 剛史, 小圷 成一, 平田 廣則2001 年 121 巻 1 号 p. 222-227
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーFPGA is now being watched with interest as VLSI which user can realize for a short term. Besides, by reason of popularization of portable application with a battery, power optimization is rapidly becoming very important for the design of VLSI. We propose a simultaneous placement and global routing algorithm for row-based FPGAs with critical path delay and power optimization. In the proposed method, the critical path delay is estimated based on Elmore delay model, and the power consumption is evaluated based on the switching activity of nets. The experimental results demonstrate the efficiency and effectiveness of the proposed method.抄録全体を表示PDF形式でダウンロード (1369K) -
中野 裕文, 吉岡 理文, 藤中 透, 大松 繁2001 年 121 巻 1 号 p. 228-233
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーIt is important to realize the suitable tightening of bolts by an impact wrench. To achieve the goal, we must know the clamping force of a bolt. But it is difficult to measure the force directly. In this paper, we estimate the clamping force by neural networks. The strength of tightening depends on the kind of works. At first, we try to classify the kind of works with a neural network based on the error back-propagation method. Then we use an angle control method for tightening. But this method requires the initial tightening snug fit. We will estimate the snug fit, then the clamping force. Finally, the control input for the desired tightening is determined based on the estimated clamping force.抄録全体を表示PDF形式でダウンロード (3054K) -
荒川 泰行, 吉岡 理文, 大松 繁2001 年 121 巻 1 号 p. 234-239
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーIn this paper, we propose a method to apply a texture analysis to land cover mapping of Synthetic Aperture Radar (SAR) data. Texture is a fundamental characteristic in image analysis. By using the texture analysis it is possible to find patterns in an aerial image. For classification of categories we adopt the Kohonen's Self-Organizing Map (SOM) and compare the results with those of the maximum likelihood classifier.抄録全体を表示PDF形式でダウンロード (3564K) -
Toru Fujinaka, Sigeru Omatu2001 年 121 巻 1 号 p. 240-245
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーA method for constructing a linear quadratic regulator with prescribed closed-loop poles is presented. The design method employs successive shifting of either a single real pole or a pair of complex conjugate poles at a time. This imposes a certain limitation to the location of the closed-loop poles to be specified, and the region of assignable poles is clarified. The effectiveness of the proposed method is illustrated by a numerical example.抄録全体を表示PDF形式でダウンロード (945K) -
川名 学, 平松 友康, 宮崎 道雄, 難波 典之2001 年 121 巻 1 号 p. 246-251
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーFor the problems that have plural optimal solutions like as scheduling problems or simultaneous equa-tions, it is desired to get plural solutions simultaneously. It has been reported that Immune Algorithm (IA) is an useful method to solve such problems. But various IA parameters such as crossover rate should be set optimally. About this setting problem of the IA parameters, the methods to control the IA in which the IA parameters are changed dynamically by using Meta GA have been reported. However, they had a problem of long searching time though they had good performance. In contrast with it, Evolution Strategy (ES) has the system as that each ES individual in the population evolves independently because the individuals evolve basically by mutations without crossovers. So searching time can be shortened when ES is used as Meta algorithm. In this paper, a method of dynamic control of the IA by using the ESNM (Evolution Strategy with Niche Method) is proposed in order to realize efficient IA search. And this method is applied to simultaneous nonlinear equations, and its performance is compared with that obtained by usual method.抄録全体を表示PDF形式でダウンロード (1379K) -
宮崎 道雄, 吉澤 修, 李 羲頡, 李 相球, 大浦 邦彦, 秋月 影雄2001 年 121 巻 1 号 p. 252-260
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーThe traffic congestion of an expressway is on the increase with the enhancement of traffic demand. So the development of the effective traffic control in the expressway becomes important. Therefore, We formulate the knowledge of an operator in the road traffic control center in the rule to solve this problem and construct the control system done instead of an operator. But many number of elements of multidimensional fuzzy relation become enormous when the traffic control is performed in a wide area. In this paper, we approximately construct the dimensional reduction of fuzzy relation from software viewpoint. For the purpose of the dimensional reduction, we use Genetic Algorithms. And we apply proposed technique to inflow control of the expressway. We can get the good results as same as an operator's decision.抄録全体を表示PDF形式でダウンロード (1547K) -
Fei Qian, Yue Zhao, Hironori Hirata2001 年 121 巻 1 号 p. 261-268
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーWe present a model of learning cellular automata (LCA) as an emergent system having some collective behaviors. LCA is an extended version of the traditional cellular automaton. Especially, we adopt the LCA with some self-improving functions, called self-improving learning cellular automata (SILCA) and develop its optimization capability. Each self-improving learning cellular automaton, i.e. a member of SILCA, consists of two parts: main body and a universal constructor. Through the use of a constructing arm, a learning cellular automaton is capable of constructing any configuration whose description can be stored on its input tape. As an example of combinatorial optimization problems, we consider function optimization problems and show the SILCA's emergent capability for optimization.抄録全体を表示PDF形式でダウンロード (2204K) -
伊藤 雄一, 田中 玲子, 相吉 英太郎2001 年 121 巻 1 号 p. 269-274
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーThis paper formulates two types of controller assignment problems, considering the minimization of the number of controllers retaining the controllability and the control performance for homogeneous decentralized systems. Since they are formulated as combinatorial optimization problems, we can use efficient algorithms, such as genetic algorithms and immune algorithms, to solve them and to clarify the desirable assignment of the controllers.抄録全体を表示PDF形式でダウンロード (762K) -
入月 康晴, 古橋 武2001 年 121 巻 1 号 p. 275-281
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーResidue Fluid Catalytic Cracking Unit (RFCCU) is the heart of the modem petroleum refinery. There has been a strong demand for decreasing the electric power and manpower in operating RFCCU. A combined control system has been constructed for satisfying this demand by controlling the reactor/regenerator differential pressure of RFCCU. The problem of this control system was that the analyzer of oxygen component, which is one of the important input variables of this control system, lacked reliability. This paper presents a nonlinear modeling method for identification of predictor of oxygen component using a neural network and a linear regression equation. This method uses genetic algorithm to select predictor variables of the linear regression equation. The obtained predictor showed a satisfactory performance even in the case where the analyzer was malfunctioning. While the measured value changed drastically and became wrong, the predicted value stayed in a valid range. The combined controller was possible to be implemented with this predictor. The differential pressure was stabilized, and a considerable amount of electric power was reduced. The implementation of this control system could also reduce the manpower needed for the operation of RFCCU.抄録全体を表示PDF形式でダウンロード (853K) -
川路 茂保, 小笠原 健一2001 年 121 巻 1 号 p. 282-289
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーLocomotion of the higher animals is provoked in accordance with rhythm generated in the spinal cord, and which is corrected according to visual and somatosensory information during locomotion. Thus, rhythm seems to be a reference in locomotion control of biped robots. On the basis of those physiological knowledge, we proposed a rhythm-based locomotion control scheme for biped robots. In the scheme, rhythm may be designed on the basis of observations of human locomotion, but it should be designed to accord with kinetic characteristics of robot for reducing the load that is put on actuators.
In this paper, we regard the optimum rhythm designing problem as an optimum trajectory designing prob-lem, and formulate it to get a trajectory by following which a biped robot is able to locomote with minimum amount of kinetic energy. In the optimum trajectory design problem, velocity or acceleration continuity of links is used as a constraint condition, and Genetic Algorithm is used for solving the problem. It is found out through simulations that similar trajectory patterns in shape are obtained under both conditions, and a biped robot stably locomotes with satisfying ZMP criterion using minimum kinetic energy by utilizing its falling-forward motion.抄録全体を表示PDF形式でダウンロード (1912K) -
Yoshinori TAKEI, Jun IMAI, Kiyoshi WADA2001 年 121 巻 1 号 p. 290-295
発行日: 2001/01/01
公開日: 2008/12/19
ジャーナル フリーIn this paper, another interpretation for Subspace-based State Space System IDentification (4SID) meth-ods by subspace extraction via Schur complement is presented. In the ordinary MIMO Output-Error State space model identification (MOESP) algorithm, it is shown that the estimate of the extended observability matrix is obtained from Schur complement matrix, which is derived from the matrix consisted of the Hankel matrices of input-output data. The proposed method is applied similarly to Instrumental Variable (IV) based 4SID methods. A feature of our method is that the same procedure can be applicable to both cases, MOESP and IV-based one. We also propose a recursive computation based on the subspace extraction via Schur complement. Finally, a numerical example illustrates the proposed algorithm.抄録全体を表示PDF形式でダウンロード (1128K)