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Volume 13, Issue 3
Displaying 1-9 of 9 articles from this issue
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Transient and Oscillatory Spike TrainsKukan SELVARATNAM, Yasuaki KUROE, Takehiro MORI2000 Volume 13 Issue 3 Pages 95-104
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSIn an artificial Spiking Neural Network (SNN) the information processing and transmission are carried out by spike trains in a manner similar to the generic biological neurons. Recently it has been reported that they are computationally more powerful than the conventional neural networks. Yet, there are no well defined efficient methods for learning due to their rather intricately discontinuous and nonlinear mechanisms. In this paper, we consider a recurrent SNN constructed with integrate-and-fire type spiking neurons. First we propose a learning method such that the SNN possesses desired transient responses (spike-train outputs) by changing the synaptic weights. Further by including periodic state conditions we propose a learning method such that the SNN possesses desired oscillatory responses (limit cycle spike train) by changing both the synaptic weights and the initial conditions. Simulation examples are also provided to verify the efficiency and the applicability of the proposed algorithm.View full abstractDownload PDF (1246K) -
Yoshihisa OTSUKA, Masami KONISHI, Takeshi MAKI2000 Volume 13 Issue 3 Pages 105-114
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSThis paper studies the control model of hot metal temperature (HMT) in the blast furnace, from the view point of control theory, and clarifies that
(1) HMT can be stabilized using the feedback of the HMT at the lower area of blast furnace, when it can be measured,
(2) the estimation model of HMT at the lower area of blast furnace should be developed and be included in the control system, when it can't be measured, and
(3) the model should estimate not only the dynamics of HMT change against actions like blast temperature change but also that of the HMT change caused by disturbance factor.
Furthermore, the clarified properties are applied to blow-in operation planning and contribute to the short term planning.View full abstractDownload PDF (1188K) -
Motion Planning Method for Mobile Robots in Large Scale Transportation Systems by Genetic AlgorithmsShinichiro ENDO, Masami KONISHI, Toshimichi MORIWAKI, Masayoshi YOSHID ...2000 Volume 13 Issue 3 Pages 115-123
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSThis paper discusses a motion planning method for mobile robots in large scale transportation systems such as transportation of parts in factory, wafers in semiconductor factory, inspection objects in hospital and so on. Recently, mobile robots in such systems have become complex with an increasing number of transships for transportation. The problem is to determine the appropriate traversal route for each mobile robots improving efficiency of transportation. First, this problem is divided into several zones in which Genetic algorithms are applied to search an optimal traversal route for each zones. Then, the results in all zones are combined to determine a total traversal route by Genetic algorithms. The proposed method enabled us to solve large scale transportation problem in practicable computing time for online use.View full abstractDownload PDF (1068K) -
Masato ISHIKAWA, Mitsuji SAMPEI2000 Volume 13 Issue 3 Pages 124-133
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSIn this paper, we propose an optical measurement system for a nonholonomic wheeled robot, and develop a state estimation method and a measurement-output feedback controller. Since the kinematic model of such a wheeled mobile robot is expressed as a driftless nonlinear state equation, there arises a difficulty in observer design that the observability depends on control inputs. This matter is settled by transforming the time-scale of the state equation to a new one, which represents the trajectory of the mobile robot. Then we construct a nonlinear observer which achieves local exponential estimation-error convergence and allows us to specify its rate, where the design method is based on “the extended Luenberger observer (Zeitz)”. Finally, we apply a control strategy for a class of driftless systems based on “time-state control form (Sampei et al.)” to the position control problem by combining it with the observer to form an output feedback controller. Some results of numerical simulations are also presented.View full abstractDownload PDF (1248K) -
Hiroyuki KANO, Toshimitsu NISHIMURA2000 Volume 13 Issue 3 Pages 134-140
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSLyapunov equations and inequalities are studied in connection with the stability of linear periodic systems. First, as preliminaries, existing results on Lyapunov equations in time-invariant systems are summarized in the form of equivalence theorems. Then, based on those results, existence conditions are derived for positive-definite or nonnegative-definite periodic solutions of periodic Lyapunov differential equations and inequalities with reference to the detectability and observability. Such conditions are stated all as equivalent conditions for the system to be either asymptotically stable or stable. Brief discussions are included also for periodic Lyapunov difference equations in discrete-time periodic systems.View full abstractDownload PDF (947K) -
Tetsuya YANAGIMOTO, Kazuhisa OBA, Kazuo INOUE2000 Volume 13 Issue 3 Pages 141-148
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSIn this paper, we construct a genetic algorithm (GA) for location problems of urban facilities. In the encoding of the GA, loci and alleles are defined as sites for placements and types of the facilities, respectively. An individual is a planar array. The genetic operators are selection, crossover and mutation. In the selection, roulette selection and elitist preserving selection are used. In the crossover, 2 selected individuals are each divided into 4 by 2 straight lines which are selected at random. One of the 4 divided parts is selected at random. The selected part is changed between the 2 individuals. In the mutation, a facility or a residence is randomly placed in the randomly selected locus. For fitness, the GA uses the results of the evaluating system which we have proposed. We execute simulation for placement of urban facilities and consider the results of the simulation.View full abstractDownload PDF (1016K) -
Masafumi SAKAMOTO, Yuichi TUDA, Akira TOZUNE, Toru TAKEUCHI2000 Volume 13 Issue 3 Pages 149-151
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSDownload PDF (271K) -
Hirotaka NAKAYAMA, Masao ARAKAWA, Rie SASAKI2000 Volume 13 Issue 3 Pages 152-154
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSDownload PDF (614K) -
Akira TOZUNE, Eiji TORIMOTO, Toru TAKEUCHI, Masafumi SAKAMOTO2000 Volume 13 Issue 3 Pages 155-157
Published: March 15, 2000
Released on J-STAGE: October 13, 2011
JOURNAL FREE ACCESSDownload PDF (326K)
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