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中外五大引文索引系统比较分析 总被引:4,自引:0,他引:4
郭丽芳 《现代图书情报技术》2005,21(1):36-39
根据文献分散与集中规律,中外五大引文索引系统SCI-E、SSCI、A&;HCI、CSCD、CSSCI先后建立。本文对这五大系统从收录数据、来源期刊的学科分布、网络服务平台、基于网络的深化服务等方面进行了比较分析,并针对国内CSCD、CSSCI存在的差距,提出了五点改进建议。 相似文献
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图书馆为企业提供信息服务是一个非常广阔的天地,可以大有作为。论文针对企业的信息需求.就图书馆如何营造信息服务平台以及现阶段信息服务中存在的问题进行了论述。 相似文献
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利用知识网格构建数字图书馆知识服务平台 总被引:20,自引:0,他引:20
网格是高性能计算机、数据资源、因特网三种技术的有机组合和发展,如何有效地发现和获取信息、知识是网格技术应用的关键问题。利用知识网格构建数字图书馆知识服务平台,有利于实现信息、知识的有效共享与服务的智能化,推动知识管理的革命。文章介绍了知识网格的概念及研究的核心问题,着重论述了知识网格在数字图书馆知识服务中的应用以及构建数字图书馆知识服务平台所面临的技术挑战。 相似文献
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Question classification systems play an important role in question answering systems and can be used in a wide range of other domains. The goal of question classification is to accurately assign labels to questions based on expected answer type. Most approaches in the past have relied on matching questions against hand-crafted rules. However, rules require laborious effort to create and often suffer from being too specific. Statistical question classification methods overcome these issues by employing machine learning techniques. We empirically show that a statistical approach is robust and achieves good performance on three diverse data sets with little or no hand tuning. Furthermore, we examine the role different syntactic and semantic features have on performance. We find that semantic features tend to increase performance more than purely syntactic features. Finally, we analyze common causes of misclassification error and provide insight into ways they may be overcome. 相似文献
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[目的/意义]微博对用户获取信息和建立社交网络具有重要作用。提出一种基于相似度和信任度融合的微博内容推荐方法,能够从用户需求出发进行个性化微博内容推荐,对提高微博服务质量、改善信息过载问题具有意义。[方法/过程]基于相似度和信任度融合算法,构建微博内容推荐模型,以新浪微博为研究对象,采用编程方式获取汽车、体育、运动健身、互联网和财经5个领域的数据,展开用户相似度与信任度计算的实验分析和比较。[结果/结论]分析结果显示该方法可以有效表示和挖掘微博内容,改善微博推荐的准确性和用户满意度。 相似文献
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There are three models for community archives in China. The first one is where community archives are kept in government-funded/government-established museums or archives. The second is where community archives are kept by scholarly organizations such as universities. The third involves the community establishing its own archive. This last model is very unusual in China. The PiCun Culture and Art Museum of Migrant Labor (PCMML) provides an example of this model as it is the only independent community archives focusing on migrant workers in China. This paper explores the emergence and development of PCMML, its impact on community members and challenges faced including funding and staffing, but also those unique to China—PCMML is greatly influenced by a range of national and local government policies and regulations. Conclusions are that survival strategies for independent community archives in China are dependent on three dimensions: the community itself, society and the government. Cultural consciousness of the community is the premise for the establishment and sustainability of independent community archives, and independent community archives can be the public space to cultivate cultural consciousness of community members and thus activates community members’ agency to document, preserve and disseminate their own history. At the same time, independent community archives also need to engage with broader society to avoid involution and gain support and understanding. Independent community archives are constrained by government policies and regulations, so it is essential for them to develop strategic relationships with government. 相似文献
100.
Textbook vetting and evaluation process intends to ensure that the materials provided are relevant, of the required quality, suitable ad would enhance learning efficiency and effectiveness. The paper investigates the role of publishers and Tanzania Institute of Education (TIE) in the textbooks vetting and evaluation process; examines factors used to vet, evaluate and approve primary and secondary school textbooks in Tanzania and proposes Strategies that would enhance the textbook vetting, evaluation and process. The study used a mixed method research design. Respondents were selected educational publishers; MoEVT, Baraza la Kiswahili Tanzania, TIE, and Publishers Association of Tanzania. Questionnaire and semi- structured interview were used to collect data which were analysed qualitatively and quantitatively. Major findings of the study were; textbooks vetting and evaluation process is not professionally conducted although standard criteria have been established; there is not well established roles among key players involved in the vetting and evaluation process leading to conflict of interest between TIE and the publishers. The study recommends establishing an independent professional evaluation board and a well-defined timetable and effective communication among various players; enacting a book policy and adopting a limited multiple-textbook publishing system. 相似文献