共查询到20条相似文献，搜索用时 62 毫秒
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选择中国知网(CNKI)中国知识资源总库的相关数据库作为检索数据来源,2000-2009年10年间关于数字图书馆知识组织的研究论文作为分析数据,采用文献计量学方法进行统计,并结合文献内容从文献总体、时间、空间分布、著者及机构分布、主要内容、引用及下载情况等角度分析我国关于数字图书馆知识组织的研究状况,总结数字图书馆知识组织研究的趋势和特点,并对出现的问题进行讨论。 相似文献
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董思雨 《内蒙古科技与经济》2019,(11)
知识组织作为信息资源整合的重要过程一直备受关注。笔者以中国知网数据库检索的2014年～2018年知识组织相关文献的数据源,进行文献计量分析,总结出当前领域的研究热点,并通过文献回顾的办法对这些热点方向进行论述从而了解近五年来我国对于知识组织领域的研究进展。 相似文献
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Aureka专利分析工具的文献计量分析 总被引：2，自引：2，他引：0
专利分析是竞争情报工作中的重要组成部分。Aureka是典型的文本可视化系统之一。采用文献计量学方法,对国内中国知网、维普等数据库有关Aureka专利分析软件的时间分布、期刊分布、作者及其单位和关键词分布进行了分析研究。通过文献主题的知识挖掘,探讨了该领域论文研究热点及今后可能发展趋势。 相似文献
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《内蒙古科技与经济》2016,(16)
以中国大陆图书馆领域专利检索为例,对比评价了中华人民共和国国家知识产权局网、Soopat专利搜索引擎、佰腾网、中国知网专利数据库、万方数据知识服务平台、中国知识产权网这几个常用的专利文献信息网络检索的路径。 相似文献
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针对传统知识推荐算法存在的语义缺失和精准性低问题,本文提出一种基于改进LDA-FCM的知识推荐算法。首先获取用户知识文档,采用主题优化的LDA模型挖掘用户知识主题。继而通过FCM算法将用户聚类,缩小相似度计算的遍历范围,并采用JS散度代替欧氏距离,实现FCM对象到用户的转换。最后基于UserCF算法构建用户对知识的兴趣指数并进行TOP-N推荐。爬取中国知网500篇期刊论文实测发现：与传统UserCF算法相比,改进算法的准确率、召回率和F1值分别提高了28.17%、59.62%、53.88%。 相似文献
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论数字图书馆的知识组织 总被引：4，自引：0，他引：4
在阐述知识组织问题的基础上，提出数字图书馆的知识组织方式以及采用分类主题一体化模式、专家系统模式和元数据模式等策略来组织数字图书馆的知识。 相似文献
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PPP作为近年来社会关注的热点话题,学术界涌现了大量相关文献。为描绘PPP研究的整体概貌,定位PPP研究的热点主题,以中国知网(CNKI)期刊全文数据库为数据来源,选取2006—2015年共1 403篇以PPP为主题的核心论文为样本,运用文献计量学的共词分析方法及可视化技术绘制出PPP研究热点的知识图谱;综合知识图谱及相关统计结果,挖掘出PPP研究的五大热点主题:PPP融资、PPP风险、基础设施建设、新型城镇化与保障性住房、城市轨道交通。 相似文献
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[目的/意义]对国内外医疗信息共享的研究进展进行总结和分析,介绍近年来医疗信息共享的研究热点及应用实践的现状,以期为下一步的研究指明方向。[方法/过程]文章将Web of Science核心合集和中国知网数据库作为数据来源,利用Citespace可视化工具对医疗信息共享领域的发文量、学科分布、高频关键词和研究主题演化进行定量分析。并从研究主题和应用实践两个维度进行了描述分析。[结果/结论]目前医疗信息共享的研究主要集中于医院信息系统的构建以及云计算在区域医疗中的应用,未来可以将研究重点放在如何创新应用模式上,利用知识图谱、智慧医疗、物联网等理论方法,对现有的信息共享模式进行优化。 相似文献
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依据知识图谱理论,基于中国知网1998—2018年关于该主题的核心期刊,使用Citespace知识图谱分析软件绘制发文作者共现图谱、发文机构共现图谱以及关键词演化图谱,归纳制造业转型升级的研究热点、演化脉络和研究前沿。研究表明,发文作者合作关系和研究机构的合作网络均不紧密;核心研究热点包括产业升级、比较优势、全球价值链、装备制造业、制造业服务化、生产性服务业、创新驱动和技术创新等;演化脉络按照"起步→多样化→纵向深入"的模式发展;而智能制造、新常态、供给侧结构性改革情景下的制造业转型升级等则成为研究的前沿。 相似文献
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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
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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
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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
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《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
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《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
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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
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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
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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
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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
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Leah A. Lievrouw 《The Information Society》1998,14(2):83-96
The main premise of this article is that in information societies generally, and in virtual social contexts particularly, a distinctive style of interaction to facilitate the communication of difference, heterotopic communication , has emerged. It rests on two cultural foundations: an ideological belief in the positive, socially integrating power of communication, and a prevailing ethic of instrumental rationality, subjective individualism, and strategically practiced self-interest. The former is demonstrated by the use of simulation and spectacle as sources of information; exhibitionism/voyeurism as a communicative style; and the awareness of surveillance. The latter is seen in the competitive use of knowledge as a commodity; a surface globalism masking deep parochialism; lateral as well as vertical information inequity; and the use of public versus private as strategies for engagement rather than as spaces. Those who engage in heterotopic communication resort to their 'own devices' both in the sense of personal agendas, strategies, interests, and interpretations, and in the form of the telecommunication tools that help realize them. These personal and technological devices allow individuals with the right educational and technical resources to avoid exposure to disagreement, difference, or other information that does not serve their direct purposes or reflect their particular views of the world; yet they also help convey the appearance of openness, availability, and cooperation. This style of interaction is used strategically in combination with information and communication technologies to gain social or economic advantages, but it may encourage social separatism and parochialism, inhibit the negotiation of disputes, and emphasize competing interests. 相似文献