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Transactions of the Institute of Systems, Control and Information Engineers Vol. 19 (2006), No. 7

ISIJ International
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ONLINE ISSN: 2185-811X
PRINT ISSN: 1342-5668
Publisher: THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE)

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Transactions of the Institute of Systems, Control and Information Engineers Vol. 19 (2006), No. 7

On a Reasoning Method Considering Uncertainty with Fuzziness

Rumiko AZUMA, Hayao MIYAGI

pp. 265-273

Abstract

In the field of Artificial Intelligence, there are many studies of reasoning method with uncertainty. Recently, research about the reasoning method from observed fact with uncertainty has been developed, and also the reasoning method which distinguishes the kind of uncertainty is proposed by Matsushima et al. Their research shows clarifying the mathematical model of reasoning method with uncertainty in the statistical standpoint. In this paper, we propose a reasoning system model and a method including uncertainty, based on fuzzy theory. Usually, uncertainty includes not only randomness in field of statistics but also vagueness based on the human's subjective judge with fuzziness. We consider the system in which value of observed fact is calculated using concept of fuzzy events. Moreover, we propose an algorithm of deductive reasoning using Newton-Raphson method, for the reasoning problems with randomness or fuzziness in the system.

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On a Reasoning Method Considering Uncertainty with Fuzziness

A Paper Currency Recognition System based on Neural Networks with Gaussian Functions and an Optimizing Method for Its Parameters on Way to Learning

Baiqing SUN, Fumiaki TAKEDA

pp. 274-283

Abstract

In this paper, in order to improve rejection capabilities of the paper currency recognition system for unknown currency patterns on promise of ensuring recognition capabilities for known currency patterns, a feed-forward neural network (FNN) with Gaussian activation function is proposed. The proposed activation function is a ridge-like function. Moreover, a hybrid-learning algorithm for optimizing the width parameters of the Gaussian function is proposed. In the network the Gaussian activation function instead of the sigmoid function is employed in all units of hidden and output layers. The algorithm consists of two steps, one is exploring local minima by employing the gradient descent search, and the other is extricating the search from local minima, in which a random search with the downhill simplex method is employed. The results of simulation reveal the potential effectiveness of the proposed activation function and the algorithm. The system with the proposed activation function and the proposed algorithm can recognize known currency patterns and reject the unknown currency patterns effectively.

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A Paper Currency Recognition System based on Neural Networks with Gaussian Functions and an Optimizing Method for Its Parameters on Way to Learning

Command Shaping for Sampled-Data Servo Systems with Constraints

Hisaya FUJIOKA

pp. 284-289

Abstract

A command shaping procedure for sampled-data servo systems is proposed. The command input and the initial state of discrete-time components of the system are determined by solving LMIs to optimize the quadratic tracking performance under the constraints of the values of signals such as input and state saturation. The intersample behavior of the systems is taken into account for both the performance and the constraints.

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Command Shaping for Sampled-Data Servo Systems with Constraints

State Space Design of Stable Inverse Systems for Invertible Systems with Unstable Zeros

Rui WANG, Keiji WATANABE, Eiichi MURAMATSU, Yuichi ARIGA, Sigeru ENDO

pp. 290-292

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State Space Design of Stable Inverse Systems for Invertible Systems with Unstable Zeros

Development of a Programming Language Espace for Distributed Parallel Processing

Takehiko IWAKAWA, Satoshi ONO, Shigeru NAKAYAMA

pp. 296-298

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Development of a Programming Language Espace for Distributed Parallel Processing

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