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Articles by Yu Yue Du
Total Records ( 3 ) for Yu Yue Du
  Hong Zheng , Yu Yue Du and Yu ShuXia
  As an important security service in distributed systems, non-repudiation is required to implement evidence generating or validating in the application layer. Formal methods are powerful tools to provide security services. The study applies labeled colored Petri nets to modeling and analysis of the non-repudiation in distributed environment.
  Wei Liu , Yu Yue Du , Bao Qi Guo , Chun Yan and Qiang Xu
  Dynamic Description Logic (DDL) is an extension of description logic. In dynamic description logic, both services and the service composition can be expressed in formulae, but there is still much room to promote the efficiency. In this study, a fast and effective method for web service composition is proposed for the services which perform in sequence. This method takes advantage of the partial order relation among services, dividing the service composition into two phases:on the first stage, the partial order diagram is generated in the registration server; on the second stage, the fast algorithm is run based on the partial order diagram to return web service composition to meet requests of users. By analysis and verification, the fast algorithm for web service composition presented in this study can be implemented in a linear time complexity, greatly shortening response time of the system.
  Yu Yue Du , Yong Jun Zhang and Xing Lin Zhang
  Web service discovery has always been a hot issue in the research field of Web services. In this study, services are grouped into functionally similar service clusters through calculating semantic similarity with WordNet. A Concept Position Vector model of service clusters is proposed, which can sharply cuts in the number of services that do not completely match the service requests, thus can quickly build up the set of candidate services. Therefore, the time efficiency of the service discovery can be improved compared with the general cluster-based method of service discovery.
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