机械设计专家系统中的知识表示和知识库结构的研究

The Approach to the Knowledge Representation and the Configuration of Knowledge Base in Mechanical Design Expert SYstem

本文分析了机械设计领域MDD之知识的特征,提出了集可变框架、产生式和表技术于一体的混合知识表示方法;研究了MDD之基本知识元和学习知识元.借助于知识元不仅能有效地和完整地表达MDD知识,而且还解决了具有自动进行方案评估、指出再设计方向和自动实施再设计能力的机械设计专家系统之知识表示.另外,本文还讨论了知识元的组织方法及相应的知识库之结构;最后给出了知识元的表现和应用实例.

In this paper, the features of knowledge in Mechanical Design Domain (Called HDD for short) are analyzed, and the analgamating knowledge representation which integrates variable-frame, production rule and list techique together has been provided; more, fundamental units of knowledge and learning unit of knowledge have been studied. Units of knowledge not only represent efficiently and completely the knowledge in MDD,but also can describe the knowledge in the mechanical design expert system which enable to evaluate project by itself and to point the trends to design again. The method to organize units of knowledge and the configuration of knowledge base respondent to the organization method are also discussed. Finally, the examples of application and representatin of units of knowledge are shown. It's our purpose to recommend a common and efficient knowledge representation and the efficient configuration of knowledge base to the fellows building expert systems in MDD.