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Research on Optimization of Ontology-based Knowledge Retrieval Model

Author: WangLiZheng
Tutor: XuBaoXiang
School: Jilin University
Course: Information Science
Keywords: Body Formal Concept Analysis Knowledge Retrieval Model optimization
CLC: G350
Type: Master's thesis
Year: 2011
Downloads: 178
Quote: 1
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Abstract

Ontology (ontology) was originally a philosophical concept, it is a philosophical question of the study of the nature of existence. But in recent decades, the term is applied to the computer industry, and plays an increasingly important role in artificial intelligence, computer languages ??and database theory. At present, more unified view of the body concept Studer explained: explicit formal specification of a shared conceptual model. As a valid expression of the concept of the semantic model, many aspects of the body in the field of Library and Information applications, such as information systems modeling, information extraction, Semantic Web, search engines, knowledge engineering, literature indexing, knowledge management, knowledge base construction , library information resources construction. The formal concept analysis (Formal Concept Analysis, FCA) is based on mathematical concepts and conceptual level based on the field of Applied Mathematics, 1982 German Wille Professor as a mathematical theory first introduced the concept lattice, laid the theory of formal concept analysis based on concept lattice is the core data structure of formal concept analysis theory, it is considered a powerful mathematical tool for knowledge discovery and data analysis. Formal concept analysis has been extensive use of the concept of aggregation, data mining, information retrieval, knowledge discovery, ontology engineering and its applications. Ontological and formal concept analysis in recent years has been the research focus, ontology-based knowledge retrieval research has made many achievements, at the same time with the in-depth study on the formal concept analysis, some scholars have found that the ontological and formal concept analysis between are closely linked, so the body and formal concept analysis to combine research and applied to the field of knowledge retrieval gradually attention. Formal concept analysis and body different but the two can be combined to a certain extent. Formal Concept Analysis can be used as a technique that can be applied to ontology engineering, the body can also improve the application of formal concept analysis. Formal Concept Analysis application concept lattice to extract the conceptual level, as the basis to create ontologies that can help automatic or semi-automatic generation body. Conceptual analysis of the situation can be applied to the merger of the body, the visualization of the body, the body of navigation and analysis tasks. Properties in formal concept analysis does not contain any structure, the attributes of the concept as is the concept of the body, build relationships and interdependencies between attributes, you can improve the quality of the application of formal concept analysis, to improve the formal concept analysis Application. Although the body with the formal concept analysis can be used in the field of knowledge retrieval, and the two combined to obtain a certain amount of research applied to knowledge retrieval model, a positive role in the field of knowledge retrieval. But now the concept of body and form sub-binding studies, mainly formal concept analysis as a technical tool, and applied to the domain ontology build conceptual clustering, data mining, etc., and not from the body with the formal concept analysis of the fusion mechanism perspective. After a more careful study of the body and the formal concept analysis, try the fusion mechanism of the body with the formal concept analysis, and apply it to the body of knowledge retrieval model based optimization. Specifically, respectively, from the perspective of philosophy, mathematics, knowledge management and knowledge management analysis of body and formal concept analysis combined conditions, and then based on the fusion mechanism of the body and formal concept analysis to study both the specific content of integration in a knowledge-based modeling. , including: core concepts in the field of description, to explore the concept of field Hide establish the domain ontology concept of Kind-of relations, building the domain ontology prototype, visual editing, formal description and reasoning, ontology reconstruction or body re-spend, ontology mapping eight areas. In summary, this study analyze the similarities and differences of the body with the formal concept analysis, summed up the mechanism of integration of the two, and the fusion of the two mechanism is applied to the optimization of knowledge retrieval model, expect a follow-up study to further improve the body and fusion mechanism of formal concept analysis and theories to generate new knowledge retrieval model, to improve the knowledge retrieval precision, recall, etc., to meet the needs of the user's search.

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