共查询到19条相似文献，搜索用时 203 毫秒
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主要介绍了“国家知识产权局专利检索系统”和“中国专利信息中心专利检索系统”，从收录内容和检索方式上对这两个专利检索系统作详细的分析、比较和评价，以便于用户选择使用。 相似文献
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肿瘤学文献数据库检索系统的研究 总被引：2，自引：0，他引：2
从CBMDisc和CMCC中检索并下载肿瘤专题文献。采用C/S和B/S结构，用Delphi 5.0开发数据导入和检索软件。用导入程序把下载的文献存储到Microsoft SQL Server 7.0类型的数据库中，建成“肿瘤学文献数据库”；检索系统通过100M以太网和3Com交换机连接的客户机服务器，实现网络化检索。 相似文献
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针对Web信息检索现状和当前智能检索系统存在的问题，提出一个“先控”智能检索系统，面向基础用户，充分利用质量较高的网络资源分类目录体系，辅助形象化的“知识地图”显示，快速准确地定位用户的信息需求范畴，以提高检索效率和检索精度，同时分析了实现技术和尚待解决的问题。 相似文献
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网络检索系统研究进展综述 总被引：3，自引：0，他引：3
Web上大量的异构、分布、动态的信息造成了“信息过载”。如何在传统信息检索技术的基础上开展针对Web的信息检索工作已经成为一项重要的研究课题。笔者对近年来网络检索技术进行综述,从网络检索系统分类、网络信息获取、网络信息检索相关技术、网络检索方法等方面较全面地介绍了这一领域的发展概况,并对未来网络检索系统的发展趋势提出展望。 相似文献
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数字图书馆集成检索系统中分页策略研究 总被引：1，自引：0，他引：1
集成检索系统是数字图书馆的重要组成部分,结合“NSTL国外科技文献嵌入式检索主界面”项目的实际特点,在列举信息检索中常见分页算法并使用实例对分页算法进行对比分析的基础上,为该项目的集成检索系统选择最优的分页算法,提高系统的响应速度。 相似文献
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梁锦华 《现代图书情报技术》1991,7(4):16-18
本文对比了两个文献主题数据库设计方案，并建立了实验模型进行了模拟运算，结果表明：“分段检索方案”在空间利用率和平均检索速度方面较优，而“记录号对照表检索方案”对文献的标引深度有较好的适应能力．本文还提出了一个主题词逻辑“与”运算的改进算法．改进后运算速度提高了5-10倍。 相似文献
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LSI潜在语义标引方法在情报检索中的应用 总被引：9，自引：2，他引：7
尹锋 《现代图书情报技术》1998,14(4):19-21
介绍了一种基于词相依性的语义结构, 被称为“潜在语义标引”的文献自动标引和检索技术。采用词频统计和奇值分解技术来捕捉文献的语义结构, 得到标引词、提问和文献的向量表示, 检索系统可以预测文献与提问之间的相关度, 达到检索的目的。 相似文献
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张凤楼 《现代图书情报技术》1992,8(2):2-7
本文概述了我国“七五”期间，科技情报计算机检索系统建设所取得的主要成绩、存在问题和解决途径，并对“八五”期间系统建设的主要目标和任务作了简要的介绍。 相似文献
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建立档案数据库检索系统是数字档案馆建设的重要内容，也是高校档案馆实现科学管理的重要手段。根据为用户提供服务要“快速、便捷、准确、全面、系统”的原则，高校档案馆拟建立“实体分类检索子系统”、“组织机构归类检索子系统”和“档案著述方式检索子系统”。 相似文献
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赵英莉 《现代图书情报技术》2001,17(1):71-72
“中科院文献情报机构评估系统”是“中科院文献情报评估指标体系”研究课题的一部分, 是该指标评估体系的计算机实现。本文论述了建立该系统的目标, 并在分析评估指标数据的基础上, 讨论了数据库的建立及实现该系统的技术基础, 继而对系统功能的实现进行了论述。 相似文献
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The issue of rural communication development has been conventionally examined under labels such as universal service, digital, divide, broadband deployment, and E-Government, which generally fall into two seemingly distinct categories—access and applications. In China, these concepts are currently incorporated into a single program, if not a single term—“Village Informatization Program” (“VIP”). The VIP upgraded the objectives of previous telephone and television “Village Access Projects” (“VAPs”), an upgrade which is intended to provide “comprehensive information services” in rural areas. The execution of the VIP regime has been faced with challenges. The lack of explicitly defined objectives and institutional arrangement has led to regulatory confusion and has compromised the outcome of initiatives taken by central department and regional/local governments which are more often independent in actions. China is therefore faced with the imperative of formulating the VIP regime which is to assimilate to China's unique institutional context. This article first reviews the current status of the VIP regime before moving on to the discussion of establishing an integrative and sustainable VIP regulatory regime in China. Then, the current regulatory regime is characterized based on which reforms are suggested—in which is highlighted a layer-based localization regulatory solution, which delineates provincial/local roles from central roles based on a stratified incentive policies and governance arrangement. Possible applications in other countries are discussed in the conclusion. 相似文献
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多媒体信息的组织和管理技术 总被引：4，自引：0，他引：4
概括总结了三种多媒体信息组织和管理的技术, 即扩展现有的关系数据模型; 面向对象的数据模型; 超文本和超媒体技术。简要阐明了各自的原理, 分析了各自的优势和劣势。介绍了“中国路桥多媒体数据库”的功能及其多媒体信息的组织管理方式, 指明了多媒体信息组织管理方面尚待解决的问题。 相似文献
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In 2008, the type of document “proceedings paper” (PP) was assigned in the WoS database to journal articles which were initially presented at a conference and later adapted for publication in a journal. Since the use of two different labels (“article” and “proceedings paper”) might lead to infer differences in their relevance and/or quality, this paper presents a comparative study of standard journal articles and PP in journals to explore potential differences between them. The study focuses on the Library and Information Science field in the Web of Science database and covers the 1990–2008 period. PP approximately account for 9% of the total number of articles in this field, two-thirds of which are published in monographic issues devoted to conferences, which tend to be concentrated in specific journals. Proceedings papers emerge as an heterogeneous set comprising PP in ordinary issues, similar to standard articles in structure and impact of research; and PP in monographic issues, which seem to be less comprehensive and tend to receive less citations. Faster publication of PP in monographic than in ordinary issues may conceal differences in the review process undergone by either type of paper. The main implications of these results for authors, bibliometricians, journal editors and research evaluators are pointed out. 相似文献
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包锦章 《现代图书情报技术》1997,13(5):29-32
本文分析了我国数据库建设面临的诸多困难, 介绍了万方数据公司坚持面向市场开发数据库并使之实现商品化的经验。文中还特别强调了通过合作建库的模式把更多的数据库产品推向市场的重要性。 相似文献
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A subject analysis of 5195 publications in library and information science (LIS) research in Pakistan over a period of 62 years revealed that the majority of Pakistani LIS research focused on a few subject areas. Pakistani LIS researchers gave little attention to many subjects and completely ignored others. More than a quarter (26.72%) of the total items focused on “information treatment for information services” while 22% were related to “libraries as physical collections.” Other areas with some attention included “industry, profession and education” (12.32%) and “theoretical and general aspects of libraries and information” (11.40%). Researchers paid little attention to “housing technologies,” “technical services in libraries, archives and museums,” and “management.” 相似文献
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Web页面信息检索智能代理模式研究* 总被引：5，自引：0，他引：5
This paper describes the process and the characteristics of the information retrieval on the Web page based the model of the browse, the search engine and the intellectualized retrieval agent, studies the software structure and programming of the “system set” and the “framework engine” of the network intellectualized retrieval agent. 相似文献
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傻瓜软件是我国图书馆自动化管理软件市场化的发展方向 总被引：1，自引：1，他引：0
文章从“傻瓜像机”的基本含义谈起, 接着重点阐明了图书馆自动化管理方面的“傻瓜软件”的六条优点后指出, 傻瓜软件不但是智能化软件的集中表现, 而且是我国图书馆自动化管理软件市场化的发展方向。 相似文献
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Meaning can be generated when information is related at a systemic level. Such a system can be an observer, but also a discourse, for example, operationalized as a set of documents. The measurement of semantics as similarity in patterns (correlations) and latent variables (factor analysis) has been enhanced by computer techniques and the use of statistics; for example, in “latent semantic analysis”. This communication provides an introduction, an example, pointers to relevant software, and summarizes the choices that can be made by the analyst. Visualization (“semantic mapping”) is thus made more accessible. 相似文献