共查询到20条相似文献，搜索用时 15 毫秒
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手工检索工具与机读数据库的联系和区别王晓力，赵燕（辽宁师范大学信息管理系）（辽宁省海洋水产研究所）在计算机应用到情报检索行业之前，检索工具的编制基本上是手工进行的。计算机在情报检索中的应用，首先是编制检索工具，即将一条条文献款国输入到计算机中，由计算... 相似文献
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三、计算机情报检索系统的构成与种类计算机情报检索并不神秘。它是模拟人的手工检索的。计算机情报检索的最简单的概念如下图所示: 从此图可以看出,计算机一方面接受文献记录(即文献款目及其标识),另一方面接受情报提问(即检索提问表达式),然后进行两者之间的匹配,以找出符合检索要求的文献。计算机在这里的作用,只是代替人的手翻、眼看、脑子判断的工作,即“匹配”的功能。作为一个巨大而高速、准确的“匹配器”,计算机使情报检索的过程实现了“电 相似文献
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七、检索失误及其根源在实际的检索中,往往产生一些失误,即漏检和失检。也就是说,该找到的文献没有找全,无关的文献倒被查出来了。克服检索失误,提高查全与查准性能,应该说是计算机检索服务的生命线。造成检索失误的根源是多方面的。如标引质量、词表质量、检索程序的功能、系统与用户的交互功能、检索策略的构造质量、数据库的选择等等。都是有关的因素、现将其列表如下: 八、机检的两种方式——脫机检索和联机检索从检索者同计算机情报检索系统的通讯方式来看、有所谓脫机检索和联机检索。甲:脫机检索: 就是检索者直接在计算机旁检索,不需要远程终端设备,也不需要通讯网络。因此它不要求太高的技术条件,成本也较便宜。脫机检索方式往往把一批检索提问集中起来,定期地成批地在计算机上查找,即所谓批处理方式。但是,脫机检索有它较严重的缺 相似文献
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情报语言学与索引学的密切关系在于：（1）作为情报语言学主要研究对象的情报检索语言,其两个主要的应用领域之一是编制检索情报源这一大类型的索引（即各种文献篇目索引）;（2）不使用情报检索语言的各种类型的索引也普遍使用着情报检索语言的原理和方法;（3）情报语言学研究与索引学研究的根本目的都是提高文献情报检索系统（包括计算机的和传统的检索工具、目录、索引）的检索效率; 相似文献
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本文通过加权检索与逻辑检索的比较分析和引入负值权数的概念, 论述了在计算机情报检索中加权法提问式与提问逻辑式在表达意义上的可等价性, 并提出了合理确定权数的一种简便方法。文中还侧重论述了加权检索在采用顺排文档与倒排文档检索中的实现方法。 相似文献
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薛慧力 《福建图书馆理论与实践》1997,(3):36-37
随着信息时代文献量的急骤增加和计算机应用技术的推广，情报检索的方式发生了很大的变化，由传统的手工检索向计算机光盘检索和网络联机检索方向发展。然而通过这些检索方式，大多数只是得到书目信息，一般情况下还须在此基础上进一步查阅原文。读者往往因大多数图书馆都难以收藏齐全各种文献，不容易查阅到原文而发愁。一种新型的检索工具——全文文本检索系统，就是为了解决这种书刊检索与利用之间的矛盾应运而生的。 相似文献
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检索语言在情报检索系统中的新思考 总被引：6，自引：0，他引：6
检索语言是情报检索领域中传统的、又是极其重要的课题。随着计算机检索技术的发展，也给检索语言的研究和发展带来了新的机遇。本文将讨论上海博物馆藏品管理系统中，机读词表管理的新技术和新思想。这将会大大促进情报检索语言的发展，同时也有利于提高计算机检索系统的质量和水平 相似文献
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浅谈计算机情报检索网络 总被引：1，自引：0，他引：1
计算机情报检索网络是计算机技术、通信技术和情报信息相结合的网络,用户可根据某种目的,在一定的时间内,利用计算机从各个网络节点检索所需的情报信息.计算机情报检索网络是以共享情报资源为目的,由计算机技术和现代通信技术,将地理上分散的情报信息联结而构成的一个系统,采用现代化方式来处理情报和提供情报给用户. 相似文献
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一、学习计算机情报检索的现实意义计算机、电信和情报三者的结合,使得情报的搜集、存贮、加工、检索和利用的流程,产生了革命性的变革。情报的传递出现了崭新的模式。同传统的情报工作方式相比,计算机检索不仅速度快、效率高,而且打破 相似文献
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F A Brahmi 《Medical reference services quarterly》1988,7(4):47-56
Since 1970, Indiana University School of Medicine Library (IUSML) has traditionally been a high volume online searching institution. The library recently implemented an end user searching program which includes MEDLINE on CD-ROM. The effect of CD-ROM on online end user and mediated searching is discussed. Comparative statistics are provided by category of search service. CD-ROM has had a dramatic lowering effect on online end user searching and has had little effect on mediated searching. IUSML's experience with CD-ROM technology has been a positive one. Trained end users have become IUSML's greatest asset. 相似文献
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Indiana University School of Medicine Library (IUSML) has traditionally been a high volume searching institution. The dramatic effect of CD-ROM on online end-user searching and the negligible effect on mediated searching was reported in an earlier study. This follow-up study reveals that the proportion of mediated searching has been drastically reduced from 94% in 1986/87 to 39% as of November 1989. Mediated searches are declining in absolute numbers as well. End-user searching, by contrast, has increased by 54% percent over the previous year. A related trend is the increased use of CD-ROM by the librarian as an alternative to mediated online searching. These trends are expected to continue as IUSML expands its CD-ROM operation to include other databases. As mediated searching declines, the librarian's role will increasingly include end-user training. 相似文献
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光盘数据库的情报价值与评价选择 总被引：5，自引：0，他引：5
徐骏 《现代图书情报技术》1998,14(4):34-37
论述了使用光盘数据库的现实意义与情报价值, 从用户的角度提出对其数据、检索技术及数据库维护等方面的评价范围与技术要求, 并根据光盘数据库订购特点提出若干选择策略。 相似文献
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《The Reference Librarian》2013,54(45-46):171-184
The reference librarian in academic libraries today is often challenged by the demand from patrons for information on ethnic groups from a variety of disciplines. Questions on the four "mega" ethnic groups (African Americans, Asian Americans, Hispanics, and Native Americans) are common. In addition, depending on the community in which the academic library resides, one or more ethnic groups will be emphasized. Automated indexes (particularly CD-ROM and online databases) can greatly facilitate the search for information in ethnic studies. Yet each electronic index has its own unique structure, indexing, and search protocol. The reference librarian should be attuned to the variation in ethnic group terminology and indexing in these and other resouces in order to maximize retrieval of references. To illustrate this point, an example of indexing and usage of terms related to Southeast Asians in four separate CD-ROM databases is presented. 相似文献
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《The Reference Librarian》2013,54(39):85-97
The proliferation of electronic information sources has added new dimensions to building library reference collections. As reference librarians select titles for their collections, they must also choose the most appropriate medium. For some information the choices include print, microforms, CD-ROM databases, online hosts, or locally mounted databases. Factors involved in the selection of the appropriate medium include database costs, licensing agreements, hardware/software requirements, retrieval modes, system capabilites, and information transfer. Integrating the new services into existing structures so that library patrons can derive the maximum benefit from the availability of the databases is a primary concern. 相似文献
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Short MW 《Bulletin of the Medical Library Association》1999,87(2):206-210
A survey of 131 eastern Washington rural family physicians showed that 59.5% owned a personal computer with a CD-ROM drive. There was an inverse correlation between the physicians' years in practice and computer ownership: 10 years or less (80.6%), 11 to 20 years (72.2%), 21 to 30 years (55.6%), and more than 30 years (32.4%). Those physicians who owned a computer used their CD-ROM for entertainment (52.6%), medical textbooks (44.9%), literature searching software (25.6%), drug information (17.9%), continuing medical education (15.4%), and journals on CD-ROM (11.5%). Many rural doctors who owned computers felt that CD-ROM software helped them provide better patient care (46.8%) and kept them current on new information and techniques (48.4%). Indications for medical education, libraries and CD-ROM publishers are noted. 相似文献
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《网络信息资源搜集与利用》一书在论述网络信息资源检索基本理论的基础上,对3种主要网络信息资源(联机、光盘、因特网)的检索与利用进行了全面、系统的研究与介绍,是一部具有较大参考价值的信息检索课新型教材。 相似文献