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随着语义网的发展,本体已经成为很多领域表达知识的主要手段.许多领域都根据自己的需求建立了本体来描述本领域内的知识.但是目前许多针对本体的语义查询只能对一个本体进行查询.为了实现一个查询能够对多个本体进行访问并且返回适当的查询结果,文中提出了一种利用本体映射实现对多本体的查询方法.其中的映射方法是一种基于语义的多策略结合方式.通过实验发现查询的速度与本体的数量基本呈线性关系且不会因为本体异构程度而增加. 相似文献
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随着在万维网上进行多语种语义查询要求的提高,多语言本体的研究逐渐成为热点,但是专业领域多语言本体的研究还相对较少。在对现有多语言本体构建方法的分析比较基础上,设计了两种基于OWL的、面向计算机软件工程专业领域知识的、汉英双语领域本体的构建方法,并进一步研究了基于上述两种方法的概念间相似度的计算方法,并且利用以上两种方法,以软件工程中UML知识为来源,建立了一个实验性双语领域本体。该方法在概念映射方面改进了原有方法无法有效地实现概念映射的缺陷,在多语种概念映射方面具有比较好的效果。 相似文献
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本体是客观世界知识的表现形式,随着语义Web研究的深入,研究者们构建了越来越多的本体,如何实现本体之间的知识共享和重用,成为了语义Web发展的关键。文中对本体映射的方法进行了研究,系统阐述了本体及本体映射的定义、本体映射中的相似度计算和本体映射框架等。如何减少本体映射中的人工干预,实现本体的半自动化或自动化映射将是该领域的发展方向。 相似文献
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军事通信领域本体构建与分析 总被引:1,自引:0,他引:1
构建军事通信领域本体主要是用于支持基于领域本体的数据库语义查询.基于本体模型的知识表示技术,概述了军事领域本体的整体结构,分析了军事通信领域本体的特点.对军事通信领域本体的构建方法进行了阐述,详细描述了定义类和类的属性和关系,并根据领域知识中提取公理,说明了领域本体知识进行一致性分析和推理的方法.根据这些方法,采用Stanford大学开发的Prot龟6的本体编辑工具实现了一个军事通信本体模型.对下一步将该本体应用到数据库语义查询的问题,提出了一种解决方案. 相似文献
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语义集成:本体映射方法研究 总被引:3,自引:5,他引:3
本体是客观世界知识的表现形式,随着语义Web研究的深入.研究者们构建了越来越多的本体.如何实现本体之间的知识共享和重用,成为了语义Web发展的关键。文中对本体映射的方法进行了研究,系统阐述了本体及本体映射的定义、本体映射中的相似度计算和本体映射框架等。如何减少本体映射中的人工干预,实现本体的半自动化或自动化映射将是该领域的发展方向。 相似文献
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提出了一种应用本体解决XML信息集成中语义异构的方案,设计了一个基于本体(Ontology)的XML信息集成框架。同时介绍了一种本体表示方法,并通过本体到XML Schema的映射算法,实现了对XML信息源语义层次上的有效性验证。最后阐述了XML信息查询算法,使用户可以通过本体方便地对异构XML信息源进行查询。 相似文献
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针对基于关键字匹配的传统检索方法存在的不足,在检索过程中引入语义,提出一个基于本体的语义检索的模型。该模型将信息检索方法与语义查询技术相结合,通过基于本体的知识库实现对检索信息的语义查询。同时研究了语义检索的关键技术—本体的构建以及语义推理。 相似文献
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介绍了一种扩展UDDI以支持语义信息的方法,即在注册Web服务时添加语义信息,并支持基于语义的查询。首先在UDDI系统中加入一个领域本体库,再为该UDDI中的每个注册服务添加语义信息,并将服务和本体库的对应关系存入到UDDI的数据库中。在服务申请者查询Web服务时,由用户提供语义查询模板,根据用户描述的本体语义信息得到候选服务列表,再根据用户对服务质量的要求计算候选服务的匹配度,将候选服务依照其匹配度的大小顺序返回给用户。 相似文献
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Ontology reuse is recommended as a key factor to develop cost-effective and high-quality ontologies because it could reduce development costs by avoiding rebuilding existing ontologies. Selecting the desired ontology from existing ontologies is essential for ontology reuse. Until now, much research on ontology selection has focused on lexical-level support. However, in these cases, it is almost impossible to find an ontology that includes all the concepts matched by the search terms at the semantic level. Finding an ontology that meets users’ needs requires a new ontology selection and ranking mechanism based on semantic similarity matching. We propose an ontology selection and ranking model consisting of selection standards and metrics based on better semantic matching capabilities. The model we propose presents two novel features different from previous research models. First, it enhances the ontology selection and ranking method practically and effectively by enabling semantic matching of taxonomy or relational linkage between concepts. Second, it identifies what measures should be used to rank ontologies in the given context and what weight should be assigned to each selection measure. 相似文献
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In the context of technological expansion and development, companies feel the need to renew and optimize their information systems as they search for the best way to manage knowledge. Business ontologies within the semantic web are an excellent tool for managing knowledge within this space. The proposal in this article consists of a methodology for integrating information in companies. The application of this methodology results in the creation of a specific business ontology capable of semantic interoperability. The resulting ontology, developed from the information system of specific companies, represents the fundamental business concepts, thus making it a highly appropriate information integration tool. Its level of semantic expressivity improves on that of its own sources, and its solidity and consistency are guaranteed by means of checking by current reasoning tools. An ontology created in this way could drive the renewal processes of companies’ information systems. A comparison is also made with a number of well-known business ontologies, and similarities and differences are drawn, highlighting the difficulty in aligning general ontologies to specific ones, such as the one we present. 相似文献
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Konstantin Todorov Nicolas James Céline Hudelot 《Multimedia Tools and Applications》2013,62(2):401-425
Ontologies have been intensively applied for improving multimedia search and retrieval by providing explicit meaning to visual content. Several multimedia ontologies have been recently proposed as knowledge models suitable for narrowing the well known semantic gap and for enabling the semantic interpretation of images. Since these ontologies have been created in different application contexts, establishing links between them, a task known as ontology matching, promises to fully unlock their potential in support of multimedia search and retrieval. This paper proposes and compares empirically two extensional ontology matching techniques applied to an important semantic image retrieval issue: automatically associating common-sense knowledge to multimedia concepts. First, we extend a previously introduced textual concept matching approach to use both textual and visual representation of images. In addition, a novel matching technique based on a multi-modal graph is proposed. We argue that the textual and visual modalities have to be seen as complementary rather than as exclusive sources of extensional information in order to improve the efficiency of the application of an ontology matching approach in the multimedia domain. An experimental evaluation is included in the paper. 相似文献
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为了将P2P中对等体的资源描述为结构化的知识,以提高资源共享,本文提出一个基于本体论的知识管理框架模型。从知识的建立和知识的检索两方面分析了模型的实现技术。探讨了相互协作的对等体按预定义查询模式和本体论匹配的语义技术实现信息搜索和知识获取的过程。 相似文献