Constructing Of Verb Groups Knowledge Base For Language Understand And Its Application In Mechanical Design

This text applies Chinese nature language understanding(CNLU) semantic analysis to the mechanical product design, through understanding and analyzing to the user's needs that are expressed in the form of Chinese natural language, and transform analysis result into the designing requirement of the concept or design parameter, offer a good design environment to user and designer.First, method based on knowledge should be adopted in the Chinese natural language understanding applied to product design domain according to the characteristic of Chinese natural language understanding in product design domain. Second, carry on the contrast to the existing semantic analytical method , find out the pluses and minuses of each theory. Especially ,introduce the case grammar and the conceptual dependency theory , synthesize but two advantages regard as theoretical foundation . then an abstract understanding process of semantic analysis of domain-oriented Chinese natural language, described in the mode :Concept-Event-Noun Concept, is set up on the base of conceptual dependency theory. The domain-oriented CNLU system is designed and implemented representing by production rules based upon the above understanding process. Due to the importance of Chinese natural language knowledge, the system emphasizes on the disposals with knowledge as follows: the static knowledge of design domain is represented by concept and static event to provide a semantic base for dynamic semantic analysis; the defined templates of dynamic event and dynamic noun designed apply reasonably static knowledge on the analysis and understanding process. Moreover, the importance of semantic analysis of prepositional phrases and structures in CNLU is illuminated briefly, totally the analysis of prepositional phrases and structures is applied to semantic analysis with verb groups as its center. Last, the semantic analysis is applied to the design of the Man-machine interface in mechanical transmission. Meanwhile, the knowledge database and some rules of semantic analysis of events are established and it runs well after debugging. It is hopeful to realize the computer-aided user requirement analysis.