Knod—a knowledge based approach for process design

Abstract Process design is a multiagent and distributed problem solving activity that can be significantly enhanced by the advent of expert system technology. Although certain types of expert systems can be built in a straightforward fashion, to build knowledge-based systems that will act as intelligent aids in process design is a difficult task. Problems may range from a lack of expressive power in the knowledge representation language to isolation from domain-specific sources of information and computer programs. KNOD is an expert shell in a personal computer that acts as a front end to a modular process simulator running in a remote VAX computer. The shell has been written in LISP. It is a frame-based, object-oriented system. Included are an OPS language and an inexact reasoning facility. It has been used as a research vehicle to test the encoding of heuristic knowledge and strategies oriented to produce the automatic design and simulation of process structures.

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