Hitachi, Ltd.

Kiyomi Mori

Motohisa Funabashi

Tadaaki Bandoh

Kenichi Kurosawa

Mikio Yoda

Toshihiko Nakano

Takushi Nishiya

Kazuo Kera

Masaru Shimada

Toshihiro Hayashi

Hirokazu Hirayama

Kenroku Nogi

Masahiro Oba

High-speed inference method and system for a production system represented by an expert system. A knowledge base comprised of a rule and a fact possessing a plurality of attributes is converted into machine language instructions executable by a processor to execute inference. The machine language instruction of the fact has the function of transferring a value of the fact to a specified location and the machine language instruction of the rule has the function of performing matching decision by referring to the specified location. The number of pattern matching operations can be decreased and the interpretation overhead can be reduced to ensure high-speed inference.

Compile type knowledge processing tool, a high-speed inference method

A method and apparatus of a learning type decision support system are provided for improved acquisition of a priori knowledge from the system object and expression of non-linear structures in the object. The system is comprised of a learning module and an executing module for outputting advice and process manipulate command values to system users by receiving input data comprising on-line data and file data. The learning module comprises (1) a symbolized dictionary unit for generating a symbolized dictionary for giving a symbolic name in accordance with a pattern comprised of a combination of the values of the input data by giving examples of a pair of the pattern and the symbolic name; (2) a preprocessing unit for transforming at least a portion of the input data into the symbolic name with reference to the symbolic dictionary generated; and, (3) a model generating unit for determining an unknown parameter contained in a predetermined skeleton model to transform the preprocessed results into desired advice and manipulation command values. The executing module arithmetically processes the input data to output the advice and the manipulation command values by using the symbolized dictionary generated by the learning module and the generated model.

Learning type decision support system

In a method and a system for simulating a distributed system, a target system is divided into asynchronously operative processes so that the simulation of said asynchronously operative, distributed system may be comprehended with the changes in the data structures by using (1) a whole structure table indicating what certain of the said divided processes can provide for other processes, (2) a system structure table representing certain of said processes with a Petri net model, and (3) a data structure table storing the data structures of input and output processing data.

System function simulation method and apparatus therefor using Petri net

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Hitachi, Japan

Kiyomi Mori