共查询到18条相似文献，搜索用时 217 毫秒
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本文运用解释结构模型(Interpretative Structural Modeling,简称ISM)的方法,分析电子信息产品领域技术性贸易壁垒(Technical Barriers to Trade,简称TBT)实施的主要影响因素,从中找出各因素之间的内在结构关系。根据各因素的重要程度,确定该领域的顶层本体因素,可以有效的解决目前电子信息产品领域顶层本体构建过程中主观性过强的问题,为下一步完善电子信息产品领域本体,建立更加可靠的基于本体的电子信息产品TBT预警信息搜集系统奠定了基础。 相似文献
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【目的/意义】为配合汉语主题词表（生物医学农业卷）编研项目的开展,适应生物、医学、农业领域术语系统
的发展趋势,满足学科应用的实际需要。【方法/过程】本研究参考 UMLS、MeSH、SNOMED CT、AGROVOC、
CABi、中国中医药学主题词表等国内外权威术语系统构建了生物、医学、农业领域《汉表》的顶层本体语义类型框
架。【结果/结论】该框架共包括62种语义类型及其属性,并通过实证检验验证了该语义类型框架的可用性。【创新/
局限】构建的顶层本体语义类型框架能够为生物、医学、农业领域主题概念提供语义背景,在汉语主题词表（生物医
学农业卷）实际编制过程中可根据需要进一步调整。 相似文献
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医学领域本体研究现状 总被引：3，自引：0，他引：3
领域本体描述了关于某个学科领域中的概念以及概念之间的关系，或者该学科领域的重要理论和基本原理。基于医疗领域的特殊需要，国内外均开展了医学领域本体的研究。本文介绍分析了国内外医学领域本体的研究现状，并提出未来需要解决的关键问题。 相似文献
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鉴于领域本体开发缺乏统一化过程,本文拟提出一种基于软件工程开发的企业本体构建标准化流程,即用结构化开发方法将企业本体构建流程划分为规划、分析、设计、实施与运行5个阶段;具体在分析阶段,又利用原型化开发方法构建初始的企业本体概念框架,以在有限的时间内提高企业本体开发的质量。另外,实验中基于该流程构建了某企业手机产品本体,并比较了与基于"骨架法"流程所构建的相同领域本体在文本过滤应用中的效果。 相似文献
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本文提出了一种基于软件工程开发的领域本体构建框架,其中利用结构化方法从整体上将领域本体构建过程划分为规划、分析、设计、实施与运行5个阶段,而在领域本体分析阶段又利用原型化方法进行领域概念及概念关系的分析与设计。在领域本体构建中将两种软件工程开发方法相结合,扬弃了各自的优缺点,使生成的领域本体更高效地满足用户的需求。 相似文献
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基于本体的文本信息检索研究 总被引：5，自引：0，他引：5
本文对如何构建基于本体的文本信息检索系统进行了探讨．并认为，利用反映概念之间关系的领域本体指导主题标引，利用反映实体之间关系的领域本体指导实体关系标引，并以本体的形式表示文档替代物和查询表达式，可以进一步提高文本信息检索系统的性能。 相似文献
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语义Web的创建需要一套共同的标准概念体系,即本体(Ontology)。本体的构造手段仍然是以手工构造为主,效率和准确率都非常低,很容易导致知识获取的瓶颈。本文给出一个半自动化的需人工干预的本体学习体系结构,采用平衡的协作建模方式来构造语义Web中的本体;介绍了基于以上体系结构的本体学习的处理过程,并讨论了领域概念抽取,概念之间关系的抽取等关键技术。 相似文献
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In this paper, we propose a multi-strategic matching and merging approach to find correspondences between ontologies based on the syntactic or semantic characteristics and constraints of the Topic Maps. Our multi-strategic matching approach consists of a linguistic module and a Topic Map constraints-based module. A linguistic module computes similarities between concepts using morphological analysis, string normalization and tokenization and language-dependent heuristics. A Topic Map constraints-based module takes advantage of several Topic Maps-dependent techniques such as a topic property-based matching, a hierarchy-based matching, and an association-based matching. This is a composite matching procedure and need not generate a cross-pair of all topics from the ontologies because unmatched pairs of topics can be removed by characteristics and constraints of the Topic Maps. Merging between Topic Maps follows the matching operations. We set up the MERGE function to integrate two Topic Maps into a new Topic Map, which satisfies such merge requirements as entity preservation, property preservation, relation preservation, and conflict resolution. For our experiments, we used oriental philosophy ontologies, western philosophy ontologies, Yahoo western philosophy dictionary, and Wikipedia philosophy ontology as input ontologies. Our experiments show that the automatically generated matching results conform to the outputs generated manually by domain experts and can be of great benefit to the following merging operations. 相似文献
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构建本体时获取概念方法研究 总被引：5，自引：0，他引：5
论述了领域本体构建中本体概念获取的重要性,介绍了领域本体概念的获取方法,并且以食品安全领域本体构建为例对每种方法进行说明,最后对每种方法的适用性和本体概念具备的特征进行讨论,对于领域本体构建时概念的获取具有启发作用. 相似文献
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This article presents conceptual navigation and NavCon, an architecture that implements this navigation in World Wide Web pages. NavCon architecture makes use of ontology as metadata to contextualize user search for information. Based on ontologies, NavCon automatically inserts conceptual links in Web pages. By using these links, the user may navigate in a graph representing ontology concepts and their relationships. By browsing this graph, it is possible to reach documents associated with the user desired ontology concept. This Web navigation supported by ontology concepts we call conceptual navigation. Conceptual navigation is a technique to browse Web sites within a context. The context filters relevant retrieved information. The context also drives user navigation through paths that meet his needs. A company may implement conceptual navigation to improve user search for information in a knowledge management environment. We suggest that the use of an ontology to conduct navigation in an Intranet may help the user to have a better understanding about the knowledge structure of the company. 相似文献
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This paper examines the meaning of context in relation to ontology based query expansion and contains a review of query expansion approaches. The various query expansion approaches include relevance feedback, corpus dependent knowledge models and corpus independent knowledge models. Case studies detailing query expansion using domain-specific and domain-independent ontologies are also included. The penultimate section attempts to synthesise the information obtained from the review and provide success factors in using an ontology for query expansion. Finally the area of further research in applying context from an ontology to query expansion within a newswire domain is described. 相似文献
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The concept of ontologies has been widely reported in the literature, and has been described various ontological designs, but few works try to explain in practical terms how to design an ontology. On the other side, although it is widely accepted the importance of maintenance of software products, few ontological designs focus on applying techniques to manage knowledge to get it. This paper analyzes the ontologies proposed to address this need, in order to present information that can help to software development organizations in similar works. Besides, is described a methodological process to structure an ontology that can be applied to manage knowledge in software maintenance. 相似文献