Research On Personalized Active Information Services Tecnology For Digital Library

Digital library is a crucial technology to solve the overload of the Internet information and one of the mediums of sharing resource and discovering knowledge. It had brought the hot attention of all the countries of the world and raised the upsurge of researching and developing since the 1990s. The ultimate goal of the digital library is to create high-effective compact and flexible information serving system. But at the moment the most modal of information serving of digital library is focused on resource that have not considered the fact that the users' character are different on major, taste, age and mind etc. So it cannot satisfy the users special need of information in essential.Aiming at the character of the digital library this article studies on a kind of serving pattern, personalized active information services that can commend actively the interesting information to the users.First of all, we analyze the existing technique and applications of the personalization services and bring forward a calculable model, DC-VSM model, aiming at the character of the digital library, which could describe the collection effectively and roundly. Furthermore, we devise a user model based DC-VSM model to describe the interesting and characters of users. They are both expressed in the format of XML. Resource description model and user profile are the essential foundation of realizing the personalized active information services.Secondly, a kind of mixed filtering algorithm is put forward which combines the content-based filtering with the collaborative filtering in order to conquer the limitation of the traditional personalized information filtering technique. It provides algorithm to update user profile self-adaptively and designs the information diffluence mechanism considering the entire system's performance, which makes commended resource shared furthest by users holding similar interest and raise the system's efficiency consequently.Finally, an agent-based personalized active information services for digital...