基于本體論的生物信息學(xué)領(lǐng)域資源語(yǔ)義檢索研究
[Abstract]:With the increasing of resource information in the field of bioinformatics, there are many drawbacks when users search for professional information using general engine, for example, too much information is returned, there is useless information, and the accuracy is low. In order to meet the needs of users, a professional semantic search engine is developed to meet the needs of users. Semantic retrieval is a retrieval method which combines information retrieval with artificial intelligence and natural language technology. In this paper, ontology and data mining, standardization of bioinformatics terms and integration of biological information data are linked. Finally, a complete set of bioinformatics ontology is formed to integrate all the data related to genes or proteins, and to describe the attributes and relationships of various biological concepts. This paper analyzes the research situation of information retrieval at home and abroad, points out the deficiency of traditional information retrieval, and puts forward the semantic retrieval which can realize semantic level retrieval. Then the related concepts of ontology and the tools and methods of ontology construction are introduced in detail, the advantages and disadvantages of each method are analyzed, the advantages of various construction methods are comprehensively considered, and combined with the actual situation of bioinformatics, A domain ontology of bioinformatics based on taxonomy of bioinformatics is proposed. This paper studies some key technologies of semantic retrieval based on bioinformatics ontology in bioinformatics resources, in which the query extension of concepts in ontology structure of bioinformatics at the semantic level is described emphatically. Then, the calculation method of semantic similarity is improved, the influence of semantic relation on semantic similarity is analyzed, and the semantic extension of keywords is carried out from the aspects of concept and semantic relation between concepts. These techniques are applied to bioinformatics data platform to establish ontology knowledge base of bioinformatics system and realize semantic retrieval function. The method can improve the recall and precision of data retrieval by testing.
【學(xué)位授予單位】:中北大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類(lèi)號(hào)】:TP391.3
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