【作者】 孙丽；

【导师】 徐宝祥；

【作者基本信息】 吉林大学 ， 图书情报， 2013， 硕士

【摘要】 随着计算机技术的日益普及、Web服务器的不断发展，人们越来越依赖于互联网来获取知识资源，对知识服务的要求也越来越高。数字图书馆为满足人们日益增长的知识需求，广泛地应用计算机技术对知识资源进行组织、标注、建模、查询等。为了提高数字图书馆知识服务的质量，我们必须考虑到概念之间、关键词之间的语义关系，而不能仅仅停留在概念、关键词本身。本体作为一种完整而清晰的知识表示方式，能够克服传统知识服务模式的不足，将知识表示延伸到语义层面上，进而实现数字图书馆知识资源在语义层面的表示。本文的研究旨在将本体的思想引入数字图书馆知识导航、知识组织以及知识检索的过程中，构建出一种基于本体的数字图书馆知识服务模式，进而帮助用户更为高效、准确地从海量的数字图书馆知识资源中找到自己需要的知识。文章分为六章，研究的内容主要有：第一章是绪论，介绍了论文研究的背景、意义、主要内容、创新点、研究方法与技术路线以及国内外研究现状。第二章是对本体相关理论的阐述，包括本体的定义、分类、功能、应用、描述语言以及本体的构建原则、工具、方法等内容。第三章是对数字图书馆知识服务模式的相关理论进行介绍，包括数字图书馆知识服务的涵义、内容、特征以及现有数字图书馆知识服务的主要模式、存在的不足与发展趋势等。第四章是基于本体的数字图书馆知识服务模式的构建，包括知识导航服务、知识组织服务以及知识检索服务三个方面模式的构建。这一章从优势分析、构建原则、模式构建以及关键技术分析四个方面探讨基于本体的知识服务模式构建。第五章是案例分析，即将构建好的数字图书馆知识服务模式应用于玉米病虫害领域知识的组织、检索过程以及知识导航界面中，说明了这一模式的构建过程及可行性。第六章是总结与展望，即对文章进行总结，指出研究中存在的问题以及对后续研究的一些展望。目前，基于本体的数字图书馆的知识服务研究尚处于起步阶段，还没有一个系统的指导数字图书馆知识服务的理论。本文的主要研究成果在于构建出了一种基于本体的数字图书馆知识服务模式，它不仅保留了其在知识组织与知识检索方面的优点，而且融入了语义信息，实现了知识在语义层面的组织与检索，提高了知识服务的精度。本文的研究对于数字图书馆知识服务研究来说只是一个开始，研究的过程也存在这许多不足，还有大量的后续工作要进行。相信，这一模式不仅具有良好的应用前景，可以带来的不小的社会经济利益，而且能够为本体在图书情报界及其他领域的应用起到一定的推动作用。更多还原

【Abstract】 With the increasing popularity of computer technology，the continuousdevelopment of Web servers，people more and more dependent on the Internetto access to knowledge resources，more and more is also high to therequirement of knowledge service. In order to satisfy people’s growingdemand for knowledge， Digital library widely applicate computertechnology to organize，tag，model and query knowledge resources. For thesake of improving the quality of the digital library knowledge service，we have to consider the semantic relations of concepts and keywords，not only stay in the concept，the keyword itself. As a complete and clearknowledge representation，ontology can overcome the defect of traditionalknowledge service model and extend knowledge representation to thesemantic level so as to realize knowledge representation of digitallibrary knowledge resources at the semantic level. Research of this paperaims at bringing ontology thought into knowledge navigation，knowledgeorganization，and knowledge retrieval process of digital library. Thenbuild a knowledge service model of digital library based on ontology soas to help users find knowledge which they need from the vast amounts ofknowledge resources in digital library more efficiently and accurately.The article is divided into six chapters, the contents of the studyare: the first chapter is the introduction，introduced the background，significance，main content，innovation points，research methods andtechnical route of the thesis as well as domestic and foreign researchstatus. The second chapter is related to ontology theory，includingdefinition，classification，function，applications，description language，building principles，tools，methods and other content of ontology. The third chapter is introduced the relevant theory of digital libraryknowledge service model，including meaning，content，characteristics ofdigital library knowledge service and the existing main knowledgeservice models of digital library，the deficiencies and the developmenttendency and so on. The fourth chapter is the construction of knowledgeservice model of digital library based on ontology，including knowledgenavigation，knowledge organization and knowledge retrieval service threeaspects. This chapter discusses knowledge service model of digitallibrary based on ontology build from four aspects: advantage analysis，building principles，model build and key technology analysis.The fifthchapter is case analysis，is about to apply the building knowledge servicemodel of digital library to the knowledge organization， knowledgeretrieval process and knowledge navigation interface in the corn diseasesand insect pests fields，then illustrates the build process and thefeasibility of this model. The sixth chapter is conclusion and prospect，including the summary of this article and pointed out problems existingin the study and some prospects for further research.At present，research on knowledge service of digital library basedon ontology is still in its infancy，and not yet a system theory to guideknowledge service of digital library.Main research result of this paperis to build a knowledge service model of digital library based on ontology，which not only retains the advantages in knowledge organization andknowledge retrieval，but also integrates into the semantic information，realizes the organization and retrieval of knowledge in the semanticlevel，improves the accuracy of the knowledge service. This study is justthe beginning for the research on knowledge service model of digitallibrary，and there are many shortcomings in the process of this study anda lot of follow-up work to do. Believe that this model not only has a goodapplication prospect and can bring significant social and economicIV benefits，but also make the application of ontology play a certain rolein the library and information field and other areas.更多还原