Research On Personalized Information Service User Model Building Based On Ontology

Information service issue such as"information overload"and"resources to the crowds"are increasing due to rapid information development .The traditional information services should be outdated , Personalized information services has gradually become people's attention and exploration of the hot spots .Personalized information service is a serving manner which can satisfy user individual requirement . Through studying users'behavior and habits , we give users different service strategies . If the traditional mode of information service called"people look for information", personalized information services can be called"information to find people."Personalized information service to introduce the concept of the Internet information service for a complete new ideas and open up a new service models .Personalized information service is based on good learning and accurate description of the user. User profile is key to the personalized information service and decisive to its efficiency and quality.At present the majority of the personalized information system users model using the traditional model is the key word and key vector space model , that is The key word and key words vector space model is the traditional model used by the majority of the majority of the personalized information system users model ,at present. That is , use of keywords vector show documents and information resources relationship and to make use of vector to calculate the distance between similarity .The advantage of this approach is the theory mature and calculation method relatively easy. But this technique not accurately reflect the semantic information documents and users of personalized information . And not reflect the documents between the documents and the similarity between the user model ,too .Therefore in order to improve the personalized information service quality, should consider the relationship between words. So introduce the concept of the Ontology .Ontology conceptualized as a model of the area, can described the concept of relationship area. give clearly background knowledge for simple terms. And thus the ontology suit for complex and heterogeneous environment in the information storage and search .Ontology as a new knowledge describe measure , extended to the semantic level , to overcome the traditional model of keywords that users of the defects, to achieve the information on the semantics . So ontology have a good future in the personalized information services.In this paper, the traditional model of users that have some shortcomings . So consider the idea of ontology modeling, give the research about model based ontology in the personalized information system:This article is based on the ontology of personalized information service users model construction. Combine the theory and methodology of traditional customers personalized information services model and ontology, set up personalized user model of ontology .Used for search information that users interested and provide users with personalized information services.In this article, research the user model based on ontology at present .Give the method make by myself and design construction of the corresponding algorithm. Enriched the field of the ontology and build a personalized user model.So this study significance not only has practical applications, also has a theoretical value.Organization and chapters arrangements:Chapter 1: Introduce, gave a briefing on the research background , the significance of research and study methods and techniques line.Chapter 2: Constructions of Ontology-based personalized user model of the theory and methods . This chapter introduces the field of ontology building a knowledge base of theory and methods, and build user model of the theory and methods. Including the definition and classification of ontology , the construction regulations and building process of domain ontology knowledge , the related concept and general process of the user model, User information collection, expression, updated and application of the method used in all sectors and technology in modeling users .Chapter 3:Ontology-based personalized information service users model construction .This chapter introduces the relationship of knowledge and research circs on ontology-based model of building users ,personalized information services domain ontology construction, etc. give the ideas about user model of personalized information service based on domain ontology.Chapter 4:The functional of user model of personalized information service based on ontology to achieve. In this chapter introduce the functional modules to achieve process, methods and results of user model. This chapter is the important part .Chapter 5:Empirical analysis. According to the former describes with concrete examples, this article proved the feasibility of the feasibility of constructing model. In this paper the feasibility of the feasibility of constructing model . This article proved the feasibility of the feasibility of constructing model.At last , Summing-up. Give the issue for further study.