Abstract:

The traditional methods of expressing and sharing case knowledge are increasingly difficult to satisfy the demand for case knowledge in product design. Based on semantic information, a case knowledge ontology which is composed of notion, expression, feature and type is proposed to achieve expressing and reusing isomerous case knowledge in this paper. It is our aim to make the case knowledge conceptualized and semantized. In order to analyse the concept similarity, a concept tree is generated on the relationship of concepts. Based on concept similarity and property similarity, a method is studied to compare, evaluate and excavate for cases. In addition, the feasibility and effectiveness of the method and the model are explained by a case of designing car doors.

Key words: case knowledge；concept similarity；ontology