Yoshiaki Shimizu

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This paper describes a modeling and analyzing method for batch sequential control systems by using colored Petri net (CPN) model. For this purpose, we propose systematic procedures to create CPN model from a various information based on ISA S88, i.e., master recipe, equipment information and batch schedule. To examine the effectiveness of the proposed(More)
Due to the recent diversification of consumer demands for products, batch processes are viewed as a promising process employed in such circumstances. However, because the limited numbers of equipment and facility are to be shared among multi-item products, it is essential to discover serious conflicts and deadlocks that incur various problems such as(More)
With the aim of developing a flexible optimization method for managing conflict resolution, this paper concerns itself with multi-objective mixed-integer programs. For this purpose, we have proposed an intelligence supported approach that combines genetic algorithm with mathematical programs (hybrid genetic algorithm) to derive the best-compromise solution.(More)
This paper presents the development up to date of a computer framework for integrating LCE methods and tools aimed at supporting ecological and economical decision making of product chains in a collaborative way. In particular, this paper proposes an approach to assist engineers and other decision makers in finding models that can be assembled into combined(More)