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Pervasive computing is booming research field, in which innovative techniques and applications are continuously forming to provide users with high quality ambient and personalized services. Applications available for end-users have become increasingly abundant, distributed and heterogeneous in pervasive computing environment. How to share and utilize these applications is a significant research problem in pervasive computing environment. This paper puts forward a User-centric Applications Sharing Model (U-ASM). The U-ASM mainly focuses on abstracting the applications from service providers and end-users, and then utilizes virtualization technology to encapsulate applications and uses ontology organize distributed applications as a logic unit with semantic relationships so that it can provide better quality of service for end-users. The research result has been applied in R&D Infrastructure and Facility Development of Ministry of Science and Technology and has great flexibility and extensibility.