Research On Semantic Web Service Composite Method Based On QoS-aware

Web service is a technology designed to support interoperable between applications in distributed system. Wikipedia defined Web service as "a service oriented architecture technology which through the standard Web protocol to provide services and guarantee interoperable between applications which in the different platform. With the advent of the era of the mobile Internet and the cloud computing, Many internet companies for the purpose of occupying the commanding heights,publishing Web services on the internet which are the functions originally hidden in internal business systems, Making more and more enabled Web services on the internet. When a single Web service does not satisfy a given complicated requirement of the client, how to combine Web services to satisfy the client’s functional and non-functional requirement, becoming a hot spot of current research. Currently, Many research have been carried out for the Web service standards, and these efforts have significantly improved flexible and convenient of service oriented architecture(SOA) in the current web services.In order to respond to client’s requirement quickly and effectively, The Web service automatic composition become the trend of Web service composition development. In the current SOA standards, there is no semantic content in the description of the Web service which makes the Web service automatic composition lacks basic support. Web3.0(semantic web) is the trend of the development of next generation Internet, SOA standards must be make relevant specification.This paper investigates the semantic Web service automatic composition, In the semantic environment, firstly, implemented the method of Web service automatic composition, then added Qo S as a condition for the choice of Web service, improving the reliability of the Web service composition. Comprehensively expounding the problem of Web service from shallow to deep.This thesis proposes a Web service automatic composition method based OWL-S, Which added note information to Web service by ontology description language, solving parameter match problem by concept reasoning machine, and processing problem of Web service composition by the algorithm of graph searching, making automation of Web service composition.This thesis proposes a Qo S aware semantic Web service automatic composition to solve the problem in which Web service automatic composition is hard to realize in the real environment. This method insure Web service can fulfill the client’s functional and non-functional requirements by global Qo S constraint. And study of the current algorithms, using functional and non-functional factors for pruning operation in the stage of forward extension. thus improve the efficiency of reverse search.