共查询到19条相似文献，搜索用时 125 毫秒
1.
国内外跨库检索系统功能的比较研究 总被引：6，自引：0，他引：6
选取国内外较有代表性的6个跨库检索系统:SearchLight、NLM Gateway、ISI CrossSearch、CALIS的统一检索平台、CSDL的集成检索系统、CNKI的跨库检索系统,从资源导航功能、检索功能、检索结果显示功能、内容敏感链接功能、个性化服务功能、特色功能、其他辅助功能7个方面对其进行比较分析,提出完善跨库检索系统功能的几点建议。 相似文献
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先介绍目前的跨库检索系统种类,再以荷兰Swets国际期刊商推出的期刊跨库检索系统为研究对象,对其检索方式进行描述,并对其针对期刊的统一检索方式作初探性分析优势及不足之处。 相似文献
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电子资源的日益增多以及检索界面的纷杂性使用户对电子资源的利用受到了影响.文章在对目前高校图书馆跨库检索系统所面临的问题和电子资源检索界面现状进行分析的基础上,提出了完善高校图书馆跨库检索系统的方案,并讨论了标准化跨库检索系统的优点及其重要意义. 相似文献
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电子资源的日益增多以及检索界面的纷杂性使用户对电子资源的利用受到了影响。本文在对目前高校图书馆跨库检索系统所面临的问题和电子资源检索界面现状进行分析的基础上。提出了完善高校图书馆跨库检索系统的实现方案，并讨论了标准化跨库检索系统的优点及其重要意义。参考文献5。 相似文献
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介绍跨库检索和粗糙集的基本概念，提出将粗糙集理论引入跨库检索系统中来构建基于粗糙集的跨库检索系统模型的方法，并对该模型对结果集的处理进行重点论述。实验结果表明，跨库检索系统的返回结果可以按照查询的相似度高低排序，以提高用户查询的准确率和有效性。 相似文献
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基于Webservice的异构数据库检索系统 总被引：27，自引：2，他引：27
异构数据库的联合检索问题是图书馆等信息服务部门急需解决的问题,文章介绍了几种现有的跨库检索方案,着重分析了Metalib、MAP等几个具有代表性的检索系统。在此基础之上提出了应用Webservice技术实现跨库检索的方案。 相似文献
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借鉴元搜索引擎的原理，设计一个基于Multi-Agent的跨库检索系统。利用界面Agent、协作Agent、汇总Agent和检索代理Agent来实现系统的智能部件，多个Agent之间的通信通过协作Agent进行协作和交互，共同完成检索任务。同时对跨库检索系统的关键技术进行研究和讨论。 相似文献
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跨库检索系统已经发展到基于元数据收集的同构聚合检索阶段。从产品功能和产品成熟度两方面考虑,选取了国内外五种同构聚合检索系统Summon、Primo、WorldCat Local、百链、书生同构跨库检索系统进行研究。在对各系统的元数据涵盖范围、功能特点等方面进行比较的基础上,总结了目前同构聚合检索系统软件即服务的共同销售模式,并提出系统主要存在的问题:国外系统在国内实施时需要结合对异构数据库的实时检索方式进行检索,而国内系统按需下载的免费元数据质量有待加强。最后对改进同构聚合检索应用效果提出两点建议。 相似文献
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基于网格技术的跨库检索研究 总被引：1，自引：0，他引：1
从检索与网格技术的关系,分析了跨库检索系统的通常模式,即元数据整合模式、中间件模式、网页搜索代理模式、依附模式。阐述了网格技术对跨库检索的支持。即对分布式数字图书馆的数字化信息互操作技术、系统互操作与内容互操作技术、快速检索机制与数字图书馆网格环境下的资源高度共享技术等方面的应用。 相似文献
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联邦检索系统对图书馆和信息服务机构的各种数据库和网络资源进行整合,使信息资源用户“单点登录”、“一站购齐”的理想得以实现。但联邦搜索引擎和检索系统在实践中还存在资源全面集成、数据库优化选择、去重机制、检索结果个性化排序等一系列问题,值得软件开发商在联邦检索系统完善中加以重视,以便为联邦软件的广泛应用提供良好的技术支撑。 相似文献
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BioSYNTHESIS is a prototype intelligent retrieval system under development as part of the IAIMS project at Georgetown University. The aim is to create an integrated system that can retrieve information located on disparate computer systems. The project work has been divided in two phases: BioSYNTHESIS I, development of a single menu to access various databases which reside on different computers; and BioSYNTHESIS II, development of a search component that facilitates complex searching for the user. BioSYNTHESIS II will accept a user's query and conduct a search for appropriate information in the IAIMS databases at Georgetown. For information not available at Georgetown, such as full text, it will access selected remote systems and translate the search query as appropriate for the target system. The search through various computer systems and different databases with unique storage and retrieval structures will be transparent to the user. BioSYNTHESIS I is complete and available to users. The design work for BioSYNTHESIS II is under development and will continue as a multiyear technical research effort of the proposed Georgetown IAIMS implementation project. 相似文献
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文章指出目前不同联合参考咨询知识库中信息的分类标准、检索途径的设置存在的差别很大,造成用户使用困难。提出合作开发联合参考咨询软件、优化知识库检索界面、统一标准加强知识库的检索功能、增强知识库检索的智能性和互动性等策略,以优化我国联合参考咨询知识库性能及提高其使用效率。 相似文献
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The MELVYL MEDLINE project resulted in the addition of a full five-year subset of MEDLINE to the University of California's (UC) MELVYL online union catalog. As one of the nation's largest MEDLINE end-user searching systems, MELVYL MEDLINE provides online bibliographic access to the biomedical journal literature for all UC personnel at over seventy library sites or by remote access. This paper summarizes the project's accomplishments, reports MELVYL MEDLINE use and its impact on library services, and provides insights for other end-user search systems. The project serves as a model for adding databases to the MELVYL catalog and demonstrates the potential for use by other disciplines of a specialized database when readily accessible. Evaluation results report high user satisfaction and high usage. However, many advanced searching features of the interface are little used by searchers. Effects on library services include marked increases in reference transactions and interlibrary loans, with significant declines in mediated search services. Future MELVYL MEDLINE enhancements include matching search retrievals to journal locations, linkage to an online document delivery system, and consideration of building a superset of databases by combining MELVYL MEDLINE with citations from another database in the MELVYL catalog. 相似文献
16.
SCIE和Scopus数据库的比较研究 总被引：4，自引：0，他引：4
以SCIE和Scopus数据库为对象,从收录数据、检索功能、检索结果处理、个性化服务及检索效果等方面对两者进行比较分析,指出其异同。认为从总体上看,SCIE和Scopus均是功能强大的二次文献数据库,具有完善的检索功能、查找引文功能和链接整合功能,对检索结果的处理科学合理,检索结果令人满意。 相似文献
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《The Reference Librarian》2013,54(39):5-11
The argument that mediated online ready reference searching is an indispensable service is presented. The proliferation of Internet resources, including electronic journals, online catalogs, and other resources creates new user expectations and demands on reference service points. While end-user searching makes sense when a common interface for a multitude of diverse databases is provided, the contemporary version of remote access challenges searchers to tackle nearly every type of vendor product available as well as several homegrown varieties. Until "intelligent systems" can span the diversity of available online systems, librarians may once again find themselves in the role of search mediator that was common when online databases were first introduced while the task of keeping reference librarians apprised of developing electronic resources is formidable, end-user instruction is even more so. Because the diversity of online systems makes it impractical to know each system in very much detail, reference librarians will need to concentrate on developing a better conceptual framework. 相似文献
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The literature shows that students are more likely to begin their search via Google, as it is perceived to be easier and more accessible than other databases or publisher platforms. The invisible web, specifically publisher platforms, is sometimes too difficult for students to access; there are also suggestions that Google Scholar in particular may outperform other paid-for databases. The ease of access and the somewhat misguided notion that Google Scholar has more reliable information than that provided by libraries makes search engines all the more attractive. This culture of searching using a single search box is reflected in the increase in the number of libraries opting for single resource discovery systems such as Summon or Primo, which use a single search covering all the library holdings. The findings suggest that whilst Google Scholar can perform well in some circumstances, it performed only moderately well when compared with LISTA and Summon – the single resource discovery system tested. It was the least successful resource in terms of precision when compared with LISTA, Summon, Emerald and Sage. However, the simplicity of search engines begs the question: will databases and publisher platforms become obsolete? The study concludes that subject specific databases are more effective than search engines, but the complexity of accessing the invisible web is hindering their popularity. 相似文献
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.NET环境下跨库检索系统的设计与检索代理的实现 总被引：3，自引：0，他引：3
陈欣 《现代图书情报技术》2004,20(11):27-31
讨论了跨库检索的产生原因和实现方式，并借鉴元搜索引擎原理，设计了一个跨库检索系统模型，并就其检索代理模块在.NET环境下的实现进行了详细阐述 相似文献