An Application Of Semantic Analysis Of Noun Phrase Of Natural Language Understanding In Mechanical Product Design

Based on the application of natural language understanding to product design, the noun phrase and quantifier structure phrase subordinate to user requirements, which expressed in natural language style, is understood and analyzed. With the whole system running, the results are conversed into the requirement of conceptual design to support the future design.First, method based on knowledge should be adopted in the natural language understanding applied to product design domain according to the characteristic of natural language understanding in product design domain. Second, Conceptual dependency theory is chosen as an important complementarity to the method based on knowledge, through analysis and compares of several existing semantic analysis method present. Conceptual dependency trees are set up based on the conceptual dependency theory to denote the relation of concepts. By detailed analysis of the intension and the extension of concepts, noun, dynamic noun , noun phrase and classes templates established on method based on knowledge. Accomplished the understanding of noun phrase based on the coordinate relation, event noun , appositive relation and quantifier structure relation. Forth, Semantic analysis program is written to understand sentence on the basis of the work done, which can understand noun phrase and quantifier structure phrase in corresponding fields. Last, Semantic analysis of natural language understanding is applied to requirement analysis archetypal system for the design of bearings. The noun phrase and quantifier structure phrase in user requirements is understood and analyzed. With other models running, the system runs well after debug.