An improved user profile based on the user browsing behavior is proposed in this study. In the user profile, the user browsing web pages behaviors, the level of interest to keywords, the user's short-term interest and long-term interest are overall taken into account. The improved user profile based on the user browsing behavior is embedded in the personalized search engine system. The basic framework and the basic functional modules of the system are described detailed in this study. A demonstration system of IUBPSES is developed in the .NET platform. The results of the simulation experiments indicate that the retrieval effects which use the IUBPSES based on the improved user profile for information search surpass the current mainstream search engines. The direction of improvement and further research is proposed in the finally.
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