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QoS-oriented Assessment of Web Services Discovery

Author: SongChunYang
Tutor: JinKeYin
School: Hunan University
Course: Applied Computer Technology
Keywords: Web Services Quality of service Fuzzy Comprehensive Evaluation Service Discovery
CLC: TP393.09
Type: Master's thesis
Year: 2009
Downloads: 62
Quote: 1
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Abstract


With the development of Web services technology , more and more Web services provide the same services, how many of the same functions as Web services to meet the needs of service lookup has become a research hotspot. However , the existing keyword-based Web service discovery can not fully meet user needs. To solve this problem, this paper starting from the user's QoS requirements , proposes a QoS-oriented evaluation model for Web service discovery . QoS-oriented assessment of Web service discovery relates to the needs of QoS attributes , QoS evaluation , QoS feedback and Web services with QoS selection problem , this paper made ??the following main research work : an analysis of the Web service QoS requirements. The existing service-oriented architecture , based on the expansion of the UDDI registration mechanism . Joined in a UDDI registry Web service QoS information , making Web services with the support of QoS service discovery . Changed in the past when QoS is used in the study agent way to take in UDDI adding QoS monitoring module , resulting in the service discovery process does not affect the existing service discovery speed. 2 , for Web service QoS fuzziness characteristics. In this paper, triangular fuzzy numbers to represent a Web service QoS evaluation , the definition of the triangular fuzzy number representation. Depending on the QoS attributes indicator shows the normalized fuzzy representation method , and gives an approach based on triangular fuzzy numbers fuzzy comprehensive evaluation method . 3, the establishment of a user feedback model of QoS . User QoS feedback mechanism introduced by the service requester feedback QoS information to monitor the way the service provider advertising services credibility. Meanwhile , the service provider can also use the feedback information to improve the Web service QoS quality of service.

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