Research On Key Technologies Of Knowledge Service For Product Design Process

Aiming at the review and existent problem of knowledge reuse in product designprocess of manufacturing enterprises,the key technologies of active knowledgeservice for designers were discussed.The dissertation studied the knowledge form indesign process,analyzed the knowledge requirements of the designers,and thenestablished the knowledge service architecture.Based on these,how to deal with theknowledge requirements and search for the knowledge to match them wereresearched.The main work of the dissertation includes:In chapter 1,the research background of dissertation was presented.Theexample discussed about the actual scene of product design process inmanufacturing enterprises,showed the impeded problem of the knowledge flow.Then the related theory about knowledge reuse was reviewed and analyzed.On thebasis of the proposed shortage of the present research,the content and architectureof the dissertation was given.In chapter 2,the knowledge requirements in product design process wereresearched,and the concept and the classification method of knowledge servicewere proposed;the hierarchical model of knowledge service was established,whichcovered a target layer,a method layer,a technology layer and a resource layer;through introducing work flow as a process bus,the running model of knowledgeservice was constructed;finally,the key technologies of implementing the knowledgeservice architecture were analyzed.In chapter 3,the main impact factors of complicated design process were listed;process granule was proposed for dividing the design process space to formmulti-granule divided models;the designer model was established,and theassessment method of the designer capacity was researched;based on the designercapacity,the coordination and control technology of process granularity wasdiscussed,in order to choose a proper process granule divided model for thedesigner automatically. In chapter 4,the characteristics of knowledge requirements was analyzed,andthe concept of a knowledge requirement network (KRN) was proposed;then theconstructed method of a homologous KRN and a heterogeneous KRN was discussedto eliminate the uncertainty of knowledge requirements,discover implicit knowledgerequirements and finally acquire an entire and clear KRN;the evolution method ofthe KRN was researched when the knowledge requirements were modified.In chapter 5,the existed style of design knowledge and the constructed methodof design knowledge ontology library were analyzed;on the basis of the aboveresearches,a searching model of design knowledge based on ontology semanticcomputation was established;then several related key technologies were researched,including a semantic correlation computation method based on scenes and asemantic similarity computation method based on concepts distribution.In chapter 6,on the basis of design requirements of the knowledge servicesystem,the knowledge service process and function modules were designed;theknowledge storage and application method were discussed;the integrated interfacewas analyzed.In chapter 7,the research in this dissertation and a prospect for the futureresearch work were summarized.