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国家叙词库采用以《汉语主题词表》为中心表、其他中文叙词表向中心表映射的模式进行基于概念的语义集成。为了研究学科交叉对国家叙词库语义映射造成的影响,本文选取八部叙词表中环境科学大类5 120个概念,与《汉语主题词表》环境科学大类8 329个概念进行映射实验。通过计算机自动匹配发现,多表映射存在一个概念等同映射到多个概念,多个概念等同映射到一个概念等逻辑问题。本文以实例形式分析这些逻辑问题的存在形式,并从概念专指度、概念语义模糊、语义关系结构、学科背景等方面分析产生这些逻辑问题的主要原因;在此基础上,提出解决这些逻辑问题的原则以及映射完整性的判定规则。图16。表5。参考文献14。 相似文献
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从知识组织的角度介绍概念映射的重要性,分析概念映射方法的深度及研究情况。面向等同、等级和相关映射的类型特征,提出基于精确匹配可以继承的概念映射关系,并分析由于中英文词表异质异构而引起的映射关系矛盾情况,如由于代项或参项而引起的一个概念精确匹配到多个概念的问题、等级映射的深度及相关映射的选择等,并基于汉语用户的需要及编制规则提出相应的处理规则。 相似文献
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文献分类法自动映射系统的构建——以《中国图书馆分类法》与《杜威十进分类法》为例 总被引：3，自引：0，他引：3
实现文献分类法之间的互操作是信息组织和检索的迫切需要。目前在国内外大多数分类法之间互操作研究项目中,基本上是采用人工判断的方法来建立类目映射关系。笔者认为,《中国图书馆分类法》(CLC)和《杜威十进分类法》(DDC)的类目表达的整体概念可以分解成多个概念因素,整体相似可以建立在部分相似的基础上,可通过计算类目概念因素的相似度得到类目整体概念之间的相似度。在CLC与DDC自动映射系统中,类目表达的概念可以分解成类名词、注释词、下位词、上位词,根据相似值最大原则对概念因素进行配对,通过配对概念的加权,实现类目之间相似度的自动计算。根据类目相似值、类目对应概念因素(即对应词)的差额、相等概念因素(即等价词)的类别3个参数制订了详细的类目映射规则。本文还介绍了CLC与DDC自动映射系统的结构、功能和使用。 相似文献
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由于目前没有共享本体来描述语义网巾数据的语义,因此需要对不同系统之间的本体进行调和,构建本体映射模型。近两年来,研究人员在原有成果的基础上对本体映射进行了更加深入的研究,提出许多新的映射方法,如元模型、语义富集模型、自动映射模型、大规模本体映射模型、快速映射模型与语义资源协同和连接系统。探究这些映射方式和模型的优势与不足的目的在于为今后本体映射方法的研究提供借鉴。 相似文献
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KOS互操作中的术语映射研究综述* 总被引：2，自引：0，他引：2
总结基于词形、基于结构和基于语料的术语映射方法,阐述术语映射关系的主要类型,对术语映射中的映射方向性、映射不一致性、映射关系传递性、人工映射与自动映射相结合等相关问题进行简单讨论。 相似文献
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WordNet与SUMO本体之间的映射机制研究 总被引：1，自引：0，他引：1
针对本体概念与自然语言词汇之间存在普遍性与特殊性的矛盾,以WordNet同义词典和SUMO本体为研究对象,对两者进行简要概述,详细分析两者之间的映射动机,提出自然语言词汇、WordNet同义集和SUMO本体概念之间的映射模型,并深入分析WordNet同义集与SUMO本体概念之间的映射实例、映射效果及应用。希望藉此更好地利用WordNet同义词典与SUMO本体概念之间的映射关系去解决本体概念与自然语言词汇之间的矛盾,促进本体更广泛地应用于智能检索、语义分类、数据挖掘等领域。 相似文献
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对于中外分类法的映射研究,国内多关注于对计算机自动映射方法的探讨,缺乏对词表类目复杂语义关系的具体研究。本文在对DDC和《中图法》理学领域共计4639个类目进行人工直接映射的基础上,通过统计其匹配依据,得出结论:理学类目下数学、物理、化学、天文、地理等不同学科内匹配依据的总体分布呈现一致性的特点,这为检验计算机自动匹配准确性提供了方法。实验表明,类目名称、注释、主题词、类目关系作为主要的判断依据,占映射类目的63%,依据匹配规则占映射的5.14%,依据书目记录的匹配占31.87%,因此论文建议实现计算机自动匹配时,除类目自身信息外,还需考虑书目记录的匹配。 相似文献
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针对生物医学领域多源文献数据分类体系不一致、学科归属判别困难的问题,在分析国内外主流文献分类体系内容结构与已有映射方法优缺点的基础上,制定生物医学领域分类体系映射规则,提出集语义自动匹配、文献分类数据验证、人工审核于一体的融合映射方法。最终分别建立国际三大分类体系Web of Science、Scopus、FOR中生物医学类目与教育部《研究生教育学科专业目录（2022年）》相关类目的语义映射关系,开展用于肿瘤专题文献篇级分类的国内外学科体系映射实践。研究成果能够促进国际学术成果的集中检索、分类组织、统计评价等科研管理与学术分析工作,并为我国学科专业目录调整、人才培养、科研布局等提供决策依据与信息支撑。 相似文献
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《Slavic & East European Information Resources》2013,14(1):25-74
ABSTRACT The history of the almanac in Croatia is reconstructed through primary research in bibliographic and archival sources. The almanac is a vehicle for knowledge communication in informal contexts, engaging both oral tradition and literary forms traceable to medieval literacy and ways of structuring knowledge. The history of the almanac in Croatia reflects the changing context of the book trade, literacy, and the evolution of language. Four main stages are identified: (1) the beginning of the annual almanac in the seventeenth century; astrological almanacs reflecting the sensibility of the Baroque period; (2) the Enlightenment's stimulation of almanac publishing in the spirit of contemporary secular reforms in agriculture and education; (3) nineteenth-and twentieth-century almanac trade, showing complex and overlapping networks for the production, distribution and appropriation of printed almanacs;(4) roughly the end of World War II, when the almanac slowly moved out of the role of a popular mass medium and into specialized niches represented by regional, diaspora, and religious almanacs. 相似文献
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Neil De Young 《Publishing Research Quarterly》2009,25(3):139-146
Some key questions for publishers in today’s market are: Could Amazon’s recent merger and acquisitions strategy create a disruptive or paradigm shifting business model in the publishing industry? Do their recent actions post mergers and acquisitions illustrate a predicable pattern of behaviour that publishers can strategize around? This paper will explore these questions and look at some of the possible reasons behind Amazon’s business practices and the possible consequences to publishers. 相似文献
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Barbara Lison 《图书馆管理杂志》2013,53(2):180-187
ABSTRACTGerman authorities are expecting more than 1 million refugees by the end of 2015. These people come to Germany to seek protection and assistance and to build a new life, therefore it is important to welcome them and to assist them in their integration as soon as possible. This situation creates a versatile and perfectly fitting opportunity for cultural and educational programs, including libraries, which can play a vital role in this integration process. The key to integration is the knowledge of the German language, and the most important challenge now is to teach the necessary language skills to as many asylum-seekers as possible. 相似文献
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《Journal of Web Librarianship》2013,7(1):41-59
Abstract Many libraries use RSS to syndicate information about their collections to users. A survey of 65 academic libraries revealed their most common use for RSS is to disseminate information about library holdings, such as lists of new acquisitions. Even though typical RSS feeds are ill suited to the task of carrying rich bibliographic metadata, great potential exists for developing applications that can exploit metadata exposed to Web services via RSS. Using the MODS metadata format, entire catalog records can be seamlessly embedded in RSS 2.0 feeds. Existing tools, such as Library of Congress Java toolkits and XSLT stylesheets, can facilitate this process, while a new XSLT stylesheet may be used to create the RSS feeds complete with MODS records. As an example of the added functionality these MODS/RSS feeds can offer, records from a MODS-enriched RSS feed can be ingested into a non-RSS application such as Zotero. As more emerging library technologies use Web services architectures to handle data objects, the ability to syndicate catalog records will become more critical to providing innovative library Web services. 相似文献
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《Legal Reference Services Quarterly》2013,32(3-4):223-229
SUMMARY The Nevada Constitution provides voters with the ability to propose new statutes, amendments to existing statutes, and amendments to the State constitution through the initiative petition process. Voters can also approve or disapprove of existing statutes through the referendum petition process. Both require the circulation of a petition to collect a minimum number of signatures before the Secretary of State will place the measures on the ballot for the general election. As with other topics of law, Nevada has a profound shortage of research resources on initiatives and referenda, but State law and government Web sites provide enough information to allow for significant research. 相似文献
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SUMMARY This article is a case study of Ariel use at the University of Texas at Austin. The author divides the history of Ariel use into three distinct stages: resistance, full implementation, and enhanced. For each stage the advantages and disadvantages of using Ariel are discussed. The author concludes that using Ariel saves both money and staff time and permits faster delivery of documents than other methods. 相似文献
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《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(4):113-119
SUMMARY CISTI, the Canada Institute for Scientific and Technical Information, is one of the world's largest document delivery suppliers, and was among the first to be fully automated. The revolutionary Intel-liDoc system, developed during the years 1993 to 1995, provided for end-to-end automation of the document delivery process, which has enabled CISTI to improve its service and accommodate growth. From the beginning Ariel was, and remains, an integral part of IntelliDoc. This article describes how Ariel has been integrated into IntelliDoc and into CIS-TI's services, showing the benefits to CISTI and to its clients. 相似文献
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利益相关者视角下的图书馆电子借阅服务研究 总被引：1，自引：0，他引：1
[目的/意义] 以图书馆提供电子借阅服务过程中所涉及的利益相关者为研究对象,厘清各利益相关者的利益关系,提出建立基于社会平衡机制的图书馆电子借阅服务系统的主要路径。[方法/过程] 介绍图书馆电子书和电子借阅的发展现状,引入利益相关者理论分析作者、提供商、图书馆与用户之间的利益关系。[结果/结论] 研究发现图书馆电子借阅服务涉及作者与提供商的商业利益、图书馆提供信息资源的权利和用户获取知识的权利,不同利益主体存在既冲突又合作的关系;图书馆电子借阅服务系统不够成熟,产生明显的资源供需失衡问题。提出以下建议:完善法律制度,维护公共利益;扶持电子书产业发展,规范市场行为;建立许可协议标准模板,保护各方利益;控制采购成本,促进电子书资源利用;发挥电子书优势,促进电子书阅读推广。 相似文献
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Julia Petrovna Melentieva PhD 《Slavic & East European Information Resources》2013,14(4):304-321
This article is a preliminary summary of the results of a huge study of reading among urban high school students (ages 14–17) in many regions of Russia. It considers such aspects of the topic as: the place of reading in the structure of high school students' life plans and leisure activities; their motives for reading, their preferences, and the amount they read; the level of their culture of reading and information seeking; and the influence of family, peers, libraries, and the Internet on their reading habits. 相似文献