面向醫(yī)療信息檢索的本體構建和管理技術研究
[Abstract]:Because of the particularity of medical information, the retrieval effect of medical information is not satisfactory, and the appearance of ontology improves the situation. In the process of building ontology, we should reuse existing ontology as far as possible to achieve the goal of building ontology comprehensively, correctly and quickly. The heterogeneity between ontologies can be solved by ontology mapping algorithm. Although there have been many researches on ontology mapping algorithms, most of them are focused on the design of similarity measurement principle, and little attention has been paid to other aspects. Aiming at the shortcomings of the existing ontology mapping algorithms in semantic description, mapping process security and concept recognition increment, the ontology mapping algorithm is improved in this paper. A fuzzy ontology incremental mapping algorithm with privacy protection is proposed. The classification experiment is carried out using medical record data. The results are illustrated and the advantages and disadvantages of the algorithm are analyzed. This paper introduces the research background of medical information retrieval, its significance and research status at home and abroad, explains the factors restricting the development of evidence-based medicine from two aspects of theory and application, and emphasizes the necessity of the research content of this paper. Through the introduction of the organization form of medical information, the advantages of ontology in describing medical information are highlighted, through the analysis of ontology matching principle, the limitations of existing similarity calculation are known, and the specific research ideas are determined. Based on the analysis of the current experimental resources and data support, this paper estimates the difficulties that may be encountered in the research process, avoids the risk to a certain extent, and strengthens the self-confidence. In order to improve the shortcomings of ontology similarity measurement, a new five-dimensional ontology is formed by adding fuzzy concept to the existing four-element ontology, and the language description ability of ontology is enhanced. The confusion idea and the suitable similarity measure method are introduced in the mapping process, which improves the security of the mapping under the premise of ensuring the mapping is correct. In the process of concept recognition, incremental recognition principle is added to realize the recognition of undefined concepts in ontology. Combined with the above three points, a fuzzy ontology incremental mapping algorithm with privacy protection is proposed, and its working principle and implementation process are described in detail. Based on the reuse of the related knowledge system of the medical subject vocabulary, the unified medical language system and the codes of the International Classification of Diseases and the tenth edition of the glossary, this paper constructs the Noumenon of the medical record of "congenital heart defect". The mapping process of ontology is completely reproduced, the concept recognition based on electronic medical record document and the construction of semantic network are completed, which enriches the constitution of medical domain ontology. In addition, the prototype system is developed in this paper. Taking the medical records of cardiology as the research object, the classification process is described, and the experimental results are analyzed. The validity and feasibility of the proposed algorithm are proved.
【學位授予單位】:中北大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TP391.3
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