基于本体的数字图书馆个性化用户模型表示

User's Interest Presentation Based on Ontology in DL Personalized Service

本文针对当前个性化服务中基于关键词的用户兴趣表示方法在语义上的不足,结合本体语义信息丰富的特点,提出了一种基于本体的用户模型表示方法。在数字图书馆领域内,介绍了本体形式化描述并构建了数字图书馆领域本体,给出了用户模型的表示方法。并以个性化信息检索为例,说明了利用用户兴趣本体表示中的同义,上下位等关系给用户提供服务的方法。实验表明基于本体的表示方法能够给用户提供更加个性化的信息。

User＇s interests are presented by keywords or other ways based on keywords in most of personalized service of digital library. This paper tried to solve disadvantage of lack of semantic information of keyword. It proposed a new method to present user＇s interest based on ontology, and provided a detailed introduction about this method, including constructing digital library domain ontology, presenting user＇s information, and providing service using this method. Take the informational retrieval as example; it introduced the implement of service based on concepts similarity and relations between concepts, such as synonymy, Isa, PartOf and so on. Experiment shows the repre sentation based on ontology provides more personalized information than the method based on keyword.