共查询到20条相似文献，搜索用时 171 毫秒
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Statistical Insight is a database that offers the ability to search across multiple sources of data, including the federal government, private organizations, research centers, and international intergovernmental organizations in one search. Two sample searches on the same topic, a basic and an advanced, were conducted to evaluate the database. 相似文献
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Deurenberg R Vlayen J Guillo S Oliver TK Fervers B Burgers J;SEARCH Group 《Health information and libraries journal》2008,25(1):23-30
BACKGROUND: Effective literature searching is particularly important for clinical practice guideline development. Sophisticated searching and filtering mechanisms are needed to help ensure that all relevant research is reviewed. PURPOSE: To assess the methods used for the selection of evidence for guideline development by evidence-based guideline development organizations. METHODS: A semistructured questionnaire assessing the databases, search filters and evaluation methods used for literature retrieval was distributed to eight major organizations involved in evidence-based guideline development. RESULTS: All of the organizations used search filters as part of guideline development. The medline database was the primary source accessed for literature retrieval. The OVID or SilverPlatter interfaces were used in preference to the freely accessed PubMed interface. The Cochrane Library, embase, cinahl and psycinfo databases were also frequently used by the organizations. All organizations reported the intention to improve and validate their filters for finding literature specifically relevant for guidelines. DISCUSSION: In the first international survey of its kind, eight major guideline development organizations indicated a strong interest in identifying, improving and standardizing search filters to improve guideline development. It is to be hoped that this will result in the standardization of, and open access to, search filters, an improvement in literature searching outcomes and greater collaboration among guideline development organizations. 相似文献
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MEDLINEplus: building and maintaining the National Library of Medicine's consumer health Web service 总被引：1，自引：0，他引：1
MEDLINEplus is a Web-based consumer health information resource, made available by the National Library of Medicine (NLM). MEDLINEplus has been designed to provide consumers with a well-organized, selective Web site facilitating access to reliable full-text health information. In addition to full-text resources, MEDLINEplus directs consumers to dictionaries, organizations, directories, libraries, and clearinghouses for answers to health questions. For each health topic, MEDLINEplus includes a preformulated MEDLINE search created by librarians. The site has been designed to match consumer language to medical terminology. NLM has used advances in database and Web technologies to build and maintain MEDLINEplus, allowing health sciences librarians to contribute remotely to the resource. This article describes the development and implementation of MEDLINEplus, its supporting technology, and plans for future development. 相似文献
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一种基于Lucene检索引擎的全文数据库的研究与实现 总被引：15，自引：0，他引：15
在对数据库有关技术分析的基础上，分析对比了全文数据库的特点和关键所在。介绍了实现全文检索的工具包Lucene搜索引擎，并将其引入具体应用，对全文数据库索引和查找技术进行研究，提出并实现了无需后台数据库的全文数据库组织方式，事实表明，索引和查找的时空效率都很高。 相似文献
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本文采用ＢＯＲＬＡＮＤＩＤＡＰＩ关系数据库集成技术，集成多种关系数据库系统，并用信息存储与检索软件ＱＵＩＣＫＩＭＳ进行管理，实现对关系数据库的全文检索。对基于ＰＣ和基于ＳＱＬ的关系数据库数据结构、数据访问方式、数据类型进行集成；对基本表和单库或多库查询的结果进行转移，生成ＱＵＩＣＫＩＭＳ的必要文件和索引；对关系数据库提供布尔检索、前方一致检索、字段限定检索、相邻检索和位置检索等检索方式。采用动态转换关系数据库数据，减少了空间的浪费 相似文献
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唐光前 《现代图书情报技术》2003,(6):50-52
分析了基于 Microsoft Search Service为图书馆自建数据库创建 Web全文检索系统的理由、Microsoft SearchService的索引机制和检索机制 ,并运用 ASP.NET技术给出了一个具体的实现方案 相似文献
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利用Internet免费检索Biomednet数据库 总被引：2，自引：0，他引：2
本文介绍了Biomednet数据库的基本情况,对数据库的整个检索过程做了详细的讲解,同时深入研究了检索方法,并对其使用效果进行了客观的评价。 相似文献
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Sable JH Carlin BG Andrews JE Sievert MC 《Bulletin of the Medical Library Association》2000,88(2):139-144
The Internet has created new opportunities for librarians to present literature search results to clinicians. In order to take full advantage of these opportunities, libraries need to create locally maintained bibliographic databases. A simple method of creating a local bibliographic database and publishing it on the Web is described. The method uses off-the-shelf software and requires minimal programming. A hedge search strategy for outcome studies of clinical process interventions is created, and Ovid is used to search MEDLINE. The search results are saved and imported into EndNote libraries. The citations are modified, exported to a Microsoft Access database, and published on the Web. Clinicians can use a Web browser to search the database. The bibliographic database contains 13,803 MEDLINE citations of outcome studies. Most searches take between four and ten seconds and retrieve between ten and 100 citations. The entire cost of the software is under $900. Locally maintained bibliographic databases can be created easily and inexpensively. They significantly extend the evidence-based health care services that libraries can offer to clinicians. 相似文献
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论文从图书馆文献传递工作出发,探讨中小型图书馆如何利用数据库技术实现文献传递工作的统计和原文数据库建库工作,利用统计结果定量分析该工作的文献满足率、申请文献类型、文献合作单位等信息,并提出相关工作的建议。 相似文献
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论文从OCLC数据库的规模、检索技术、光盘数据库、服务的收费情况以及第一检索服务提供的重要数据库和全文数据库等角度,分析了OCLC数据库检索技术以及数据库服务的重要内容,旨在为进一步研究当今国外数据库检索技术和数据库服务方式提供参考和借鉴. 相似文献
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基于消费者信息行为的数据库构建策略研究 总被引：1，自引：0，他引：1
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As the number and diversity of distributed Web databases on the Internet exponentially increase, it is difficult for user
to know which databases are appropriate to search. Given database language models that describe the content of each database,
database selection services can provide assistance in locating databases relevant to the information needs of users. In this
paper, we propose a database selection approach based on statistical language modeling. The basic idea behind the approach
is that, for databases that are categorized into a topic hierarchy, individual language models are estimated at different
search stages, and then the databases are ranked by the similarity to the query according to the estimated language model.
Two-stage smoothed language models are presented to circumvent inaccuracy due to word sparseness. Experimental results demonstrate
that such a language modeling approach is competitive with current state-of-the-art database selection approaches. 相似文献
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周海英 《现代图书情报技术》2001,17(6):35-37
文章从检索数据库、检索途径、检索界面、检索到信息资源的内容和检索技术等方面比较了光盘检索和网络检索的情况, 并针对它们的优缺点提出了使用光盘和网络检索的一点建议。 相似文献
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郑晓梅 《现代图书情报技术》2003,(Z2)
Entrez科学文献检索体系是美国国家生物技术信息中心通过互联网为全世界提供的生物医学及相关领域的文献检索平台。本文以其核心数据库PubMed及相连数据库为对象,多方位重点介绍了检索技能,并配以示例,以利读者实践掌握。 相似文献
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N. S. Soloshenko V. M. Efremenkova O. V. Kirillova 《Scientific and Technical Information Processing》2012,39(1):13-19
A bibliometric study of publications on functional nanomaterials in Russia and worldwide is presented. The Scopus — abstracts
database with analytical facilities (Elsevier, Netherlands) is used for defining the publication activity of Russian organizations.
The ranking list of organizations with high publication activities is outlined. The departmental and regional productivity
in the field of functional nanomaterials is explored. 相似文献
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对于专业商务Web网站 ,既要求高效、可靠的数据管理和业务管理 ,又需要对海量数据进行快速、准确的检索。本文比较了关系数据库和非关系数据库的优缺点 ,提出开放式搜索引擎在这方面应用的优势 ,并以中国企业和产品数据库为例 ,介绍了利用Search’97搜索引擎开发专业商务网站检索系统的过程 相似文献