中文摘要：

提出了一种面向网络信息的层次过滤模型及其体系架构,该模型分为本体过滤层、需 求过滤层和兴趣过滤层.本体过滤层中,利用本体为基础对信息内答进行语义描述,实现信息 的计算机理解与过滤;在需求过滤层,模型通过理解用户所提出的需求中所包含的语义,进而 更加准确地通过过滤规则进行信息流过滤;在兴趣过滤层,用户兴趣通过特定方式表达,并通 过语义相似度计算实现第三过滤层.

英文摘要：

Asemantic based three-layer web information filtering model and its architecture are presented, which comprises ontolo-gy filtering layer,requirement filtering layer,and interest filtering layer. In ontology filtering layer,contents of information are de-scribed formally based on ontology, and those information which cannot be understood by ontology can be recognized and filtered ; in requirement filtering layer,web information would be filtered through calculating the semantic similarity degrees between user requirements and information features;in interest filtering layer,the user interests are described based on formal semantic,and fur-ther, the information can be filtered by comparing the similarity of user interest and information content.