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1.
本文分析叙词表、分类法与分布式本体概念的内涵与外延及各自的属性，探讨了三者相互关系，在此基础上提出了建立基于叙词表、分类法与分布式本体模型的设想。这种分布式本体是在语义和知识层次上描述信息系统的概念模型建模工具。通过对这种分布式本体的机理与实现方法的分析与总结得出结论：基于叙词表、分类法构建的分布式本体是在分布异构的网络环境下探索知识发现、知识组织、知识检索、知识服务的有效途径，是智能网络服务的必然归宿。 相似文献
2.
知识本体在分类法叙词表元数据组织中的应用研究 总被引：5，自引：0，他引：5
知识本体（ontology）是对概念体系的明确的、形式化、可共享的规范说明,即通过概念、概念间的关系等描述一个知识体系.因其“形式化”和“规范化”,很容易实现不同本体间的映射,从而实现不同元数据间的语义互操作.图书情报领域传统的分类法叙词表也是一种知识本体,在WEB 2.0环境或概念下探讨分类法叙词表的编撰和组织方式,以及不同分类法叙词表间的映射方式,可以实现知识的共享,并通过共享发挥出强大的整合效应. 相似文献
3.
语义网环境中的叙词表实例研究——利用SKOS构造机器可理解的知识组织体系 总被引：1，自引：0，他引：1
本文对叙词表在知识组织体系知识层面与语义网核心Ontology结合，阐述了叙词表表达知识概念与语义关系的能力为语义网建设提供资源组织基础；在描述层面利用SKOS对叙词表进行实例改造，对叙词语义关系可视化表示以及对网页进行主题标引。最后指出SKOS为知识组织体系提供一套简单，灵活，可扩展的机器可理解的描述和转化机制。 相似文献
4.
受控词表是分类表、叙词表、可检词单、同义词环、术语表、名称规范文档等的集合。由于主题词表、叙词表、分类表和网络分类法等存在多种语言和多种信息组织的方式,使检索变得尤为困难。为了提高检索效率,就需要实现叙词表和其他词表之间的互操作。文章通过对国际、美国和英国的叙词表编制标准中叙词表与其他词表互操作规则的研究,总结出叙词表编制标准中叙词表与其他受控词表互操作的发展方向,为我国叙词表编制标准关于叙词表和其他词表互操作内容的制定提供参考。 相似文献
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分面叙词表的关键词法链接模型 总被引：1，自引：0，他引：1
鉴于目前关键词、分类法和叙词法在实际应用中存在不足之处,本文从信息检索语言理论和三者的逻辑关系出发,提出建立“分面叙词表——关键词法链接模型”,阐述其基本流程、构建依据、可行巨、实现存在的困难及今后努力的方向,旨在为分类语言、主题语言和自然语言三位一体结合提供一套具体的参考模型。 相似文献
7.
叙词表转换为Ontology的研究 总被引：21，自引：3，他引：21
Ontology为需要共享某一领域信息的研究人员提供了通用的词表，而这正是传统的叙词表在信息检索中所起的作用。本文对叙词表向OntologY转换进行了综合性介绍，分别介绍了Ontology定义及作用、叙词表和Ontology的联系、Ontology所包含的内容和建立步骤以及叙词表转换为Ontology的研究和进展，最后结合一个具体实例加以阐述。 相似文献
8.
一种基于本体的叙词语义描述方法 总被引：2，自引：0，他引：2
本体技术作为一种能在语义和知识层次上描述概念体系的有效工具，在数字图书馆得到了广泛的关注；利用叙词表构建本体也已成为数字图书馆领域研究的热点之一。本文根据《中国分类主题词表》的分类与编排方法，讨论了叙词表的语义关系，针对叙词表的缺陷，给出了基于叙词的本体描述方法，并且提供了基于本体的多义词、同义词、惯用词等的处理。 相似文献
9.
近年来,随着各种专业文献库的建立,如何编制适用性强的叙词表,已提到重要日程上来,目前所见国内数种词表,都各有所长。同时,也存在一些不可忽视的问题。本文在编制叙词表实践经验的基础上,就专业叙词表的结构、排序、词族索引及参照项,叙词的规范化处理等问题进行了探讨,试图为编制专业叙词表提供一种最优模式,使其达到较高的适用性。 相似文献
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数字环境下叙词表的发展及应用展望 总被引：2，自引：0，他引：2
文章从叙词表的编制和应用两个方面讨论了数字资源知识组织中叙词表应该进行的变革.在编制方面,叙词表的概念术语可以来自高频的专业论文关键词,或者网络资源中用户使用的自由词,同时努力增加等同关系的术语.在获取词间关系时,可以采取统计共现率、使用用户组合检索日志、使用网络文献库日志等获取词间关系,最后展望了叙词表的应用领域. 相似文献
11.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
12.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
13.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
14.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
15.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
16.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
17.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
18.
Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
19.
Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
20.
Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献