摘要
针对传统Web教育主体难以获得高可用教育资源的问题,提出了一种面向语义主题相似度的Web教育资源查询方法。该方法建立了本体概念语义网络(Ontology Concept Semantic Network,OCSN),在此基础上,设计了基于语义主题相似度匹配的概念检索方法:在检索前主动将教育资源根据其语义和主题组织到本体概念语义网络中,然后建立一个基于语义特性的Web教育资源发现的垂直搜索引擎,并通过构造满足条件的相似度函数,将对应的语义距离映射为相似度,有效地提高了查询效率。实验结果表明此方法能够提高Web教育资源的查准率和查全率。
In order to make users acquire high availability of educational resources to solve the defects of the keyword search, a Web educational resources query methods oriented semantic theme is proposed. This method builds the ontology concept semantic networks, on the basis of this, the concept retrieval method based on the semantic theme similarity matching is designed, that is the semantic theme was introduced into ontology concept semantic network, then a Web education resource vertical search engine was set up which blended with the semantic characteristic, and map the corresponding semantic distance into similarity by constructing a similarity function to meet the conditions ,improving the query efficiency effectively. Experiment results show the method can improve information retrieval precision and recall.
出处
《计算机技术与发展》
2014年第2期104-106,110,共4页
Computer Technology and Development
基金
中国博士后基金项目(20100480701)
教育部人文社科青年基金项目(11YJC880119)
关键词
语义主题
本体知识库
资源组织框架
相似度匹配
semantic theme
ontology knowledge base
resources organizational framework
similarity matching
