The Research And Realization Of Knowledge Base Of Domain Chinese Understanding And Application In The Mechanical Product Design

Domain Chinese Understanding (DCU) was applied to the Man-machine interface of Expert System of Mechanical Product Design, established Knowledge Base (KB) of DCU and Knowledge Base Management System (KBMS). By analyzing of the user requirements in Chinese language style, the results were converting into requirement of conceptual design or parameter design to support the future design, which could make the expert system more intelligent and humanistic.First, has analyzed the natural language, Chinese characteristic, as well as KB system present situation and development tendency, the KB technology to understand system was playing the very important role. By contrasting advantage and disadvantage to knowledge representation, Conceptual Dependency (CD) theory and Production System was chosen as a method of knowledge representation. Second, built CD tree model and other conceptual templates and so on, analyzing has been made on the concept and the relationship between intension and extension of concept and the various relations between concepts. Third, through carrying on the classification and the reorganization to knowledge in the KB, used affiliation and inherited quality of CD tree to carry on the knowledge representation, reduced the KB redundancy and simplified the KB and saved the storage space and enhanced system's efficiency. The KBMS was designed to execute the management and the maintenance. At last, the KB of DCU was applied to interface of expert system of the rolling bearings design, and built the KBMS. The system runs well after debug.