基于语义主题相似度的Web教育资源查询方法

摘要

In order to make users acquire high availability of educational resources to solve the defects of the keyword search,a Web edu-cational 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 in-troduced 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 con-ditions,improving the query efficiency effectively. Experiment results show the method can improve information retrieval precision and recall.%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。