Research On Trustworthy Semantic Model Of Service Composition

Web service is an open way to provide business. It has characteristics of loosely coupled, language-independent and platform-independent which have been widely recognized by the industry and academia. Web service has become the main provider of information and service in the next-generation internet. Researchers began to put semantic into web service field. Then the intelligence and automation of web service could be enhanced. With the rapid development of internet, the number of web service is increasing.How to find the needed service from a wide range of services has become the focus of the study. When searching service,people not only concern about the service functions,but also non-functional factors,such as service trust.So how to use semantic trust in the process of semantic web service searching has become hot issue.First,this thesis provided a Service Composition Semantic Model(SeCSeM) for the lack of semantic trust in service composition in existing research.It constitutes of two parts:Service Composition Social Network(SCSN) and Muti-Dimension Trust Model(MDTM).Second,the management mechanism of SeCSeM was studied.The thesis analyzed the changes of entities in the model and provided the generating method of social relation and service trust. The computing method of service muti-demensional trust was provided through the information of every role in service composition.Third,one service search algorithm was proposed based on SeCSeM. Service list could be gotten which satisfied both users' functional and trust requirements .Finally, the algorithms were verified by experiment and prototype system was designed.