Query Expansion Of Concept Semantic Network Of Teaching Resources

With the rapid development of Internet and mobile Internet era coming, moreand more people realize the advantages of online learning, which can quickly, easilyand instantly find and solve problems which people encountered in learning, worklife. But with the rapid growth of the Internet information, accurate andcomprehensive search to the desired information has become an urgent need for thepeople. The traditional keyword-based search engine that find the number of linksare far away from the query needs of learners, which reduces the efficiency of onlinelearning and motivation of learners using of network. For these reasons, in recentyears, the concept of semantic query expansion are more and more favored bydomestic and foreign scholars, and has achieved initial research.Based on the research of the concept of query expansion, semantic network ofconcept and conceptual query expansion in the field of education, we proposed theconcept semantic network query expansion research of teaching resources. It is bymeans of the concept semantic network of teaching resources to achieve theexpanded query of teaching content to improve recall retrieval and precision ofteaching resources, and provide learners with the guided associative learning ofteaching content related to the investigation, helping learners more comprehensive,understand the depth of content knowledge, improve learners’ efficiency of onlinelearning.Our specific work carried out in the following aspects:1. Combined with the theory of knowledge to determine the organization of thestudy subjects-curriculum knowledge organization model. Defines the concept andrelationships between concepts contained in the concept semantic networks,including the relationship of parent-child concept, synonymous concept, brotherconcept and related concept. In the course "Computer Networks", for example,based on the course of natural language question answering corpus characteristics,according to the definition defines the concept of curriculum knowledge andconceptual relations, and on this basis, introduces the concept of teaching resourcesto build semantic network methods and procedures. To manage network resourcesand sharing concept, design concept of computer network management platform forexpansion in order to achieve concepts and their relationships in the course of theinquiry, management.2.Based on the similarity criteria defined learner’s query strategies andalgorithm to extract semantic based on teaching resources concept semantic networks,and discusses the query expansion algorithm, the algorithm weights and extendedterm acquisition method. Based on this algorithm is designed and implemented theconcept of semantic query expansion models and computer network implementationprocess.3.We use the concept semantic network of computer network managementplatform, according to the keyword query, to find its synonyms or up-down position,related concepts, and guide the user to select the word expansion, Then based on theGoogle search engine, search for keywords and expansion words, and finally tocompare the results of keyword search. The results prove: query expansion retrievalcan significantly improve the retrieval precision and recall based on the conceptsemantic network of teaching resources, and In the knowledge points related fields toprovide guidance for learners association study, improve the efficiency of onlinelearning, can provide a strong technical support for Teaching resources onlinesharing and access, and can be extended to other areas of the curriculum.The concept semantic network query expansion of teaching resources has agood promotion prospects.