WWW网络信息资源搜索引擎的研究进展

１９９４年的杨致远等的ＹＡＨＯＯ主题指南拉开了ＷＷＷ网络信息检索的序幕,使得网络搜索引擎和主题指南的研究成为当前国内外研究的热点,对盂内外搜索引擎的比较研究、开发利用、搜索引擎的质量和性能评价、搜索引擎的选择等,均有大量文献报道,本文从以上几个方面综述其研究进展。     

图书馆如何构筑自己的搜索引擎

主要由计算机和网络工作者设计开发的搜索引擎，经过一段时间的运行和实践，其弊端已越来越明显。专家们呼吁用“图书馆员的思维”来管理网上信息资源，这明网络信息的组织和管理呼唤以知识组织的理论来指导，才能达到高有序化。因此，图书馆应在网络信息时代抓住机遇，构筑自己的搜索引擎。     

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阐述搜索引擎的工作原理及其服务类型,并对因特网上一些著名搜索引擎的特性进行简要评析,指出现有搜索引擎存在的问题和未来的发展趋势。     

Government Information on the Web

Summary

Government information is abundant on the World Wide Web, but finding that information is often difficult. The usual routine of utilizing search engines or directories does not work well, unless an individual is interested in a specific government agency. Instead, the savvy librarian will be well advised to check the prominent journals and newspapers for announcements of new sites and utilize the homepage of the Library of Congress. With some education and experience, a user can quickly find information using the Library of Congress' homepage, the Librarian's Index to the Internet, and Beaucoup.     

Measuring Search Engine Quality

The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures.     

搜索引擎分类研究的现状与发展

基于搜索引擎分类研究现状和进展，提出了搜索引擎分类的基本原则和标准。     

搜索引擎的最新进展述要

搜索引擎已成为人们利用网络的最重要工具.目前,网络上出现了一些具有新颖性、创新性的搜索引擎或挖掘出搜索引擎的新功能,其中有些研究成果直接代表着搜索引擎的发展方向.文章通过跟踪、试用、分析等环节,对新的搜索引擎或具有新功能的搜索引擎进行了归纳,便于人们更好地了解当前世界搜索引擎的现状.     

中文搜索引擎检索语言研究

中文搜索引擎在很大程度上满了用户检索中文网络信息资源的要求，但也存在检索效果不够理想等问题，本文人检索语言的角度对现有中文搜索引擎进行分析，指出将检索语言的原理与方法应用于中文搜索引擎，必然极大地提高搜索引擎的检索效率。     

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《Ｉｎｔｅｒｎｅｔ网络信息检索－原理 工具 技巧》一书是国内首次对网络信息检索工具全面、系统研究的专著,其内容新颖、资料丰富、在理论上有独到见解,有较大的参考价值。     

国外六个著名搜索引擎的特征和评析

对国外六个著名的搜索引擎Altavista、Excite、Go、Hotbot、Lycos、Yahoo的数据库规模和范围、信息采集方式、标引内容、检索功能、结果显示格式、结果排序规则与数据库更新频率等七个方面进行了比较的评析。     

基于web的信息检索虚拟课堂设计

基于web的信息检索 ,虚拟课堂就是利用Internetwww服务具有的各种功能 ,以浏览主页的形式提供远程教学服务。信息检索虚拟课堂的开发应注意其特点、构成虚拟课堂的要素 ,注意开发步骤。参考文献 5     

检索引擎的评价和利用

从理论和应用的角度探讨了评价检索引擎的关键词检索功能的指标体系并依此为基础结合实践经验提出了提高查询效果的七点建议。     

搜索引擎在新产品科技查新中的应用

网络资源是科技查新的重要资源之一,利用搜索引擎,可以弥补新产品科技查新中数据库的信息不足。本文通过典型查新案例分析,说明搜索引擎在新产品科技查新中的作用。     

新浪、Google、Yahoo图像搜索引擎比较

比较新浪、Google、雅虎英文的图像搜索引擎在图像收集、特征抽取及描述、检索特征、检索效果等方面的优劣情况,并展望图像搜索引擎发展趋势。     

NOAH (New York Online Access to Health)

Abstract

NOAH (New York Online Access to Health) is a Web site developed by four library partner organizations, in an effort to provide timely, accurate and unbiased health information to the health consumers in New York City in both English and Spanish. Since expanded to include two other partner organizations, NOAH continues, with the help of volunteer librarians, to expand and enhance the site, always with the mission to provide full-text health information in the most user-friendly method possible.     

Search Engines for Tomorrow's Scholars,Part Two

In 2009, the Technology Development Team at the New York-based Information Delivery Services (IDS) Project created IDS Search, a consortial catalog that promoted the group's collection and interlibrary loan features equally with the local collection and local availability. Because the success of IDS Search relied heavily on users fully understanding the different types of availability, the authors conducted usability studies to investigate how well users could determine how to locate materials and understand the availability of items. Eye-tracking analysis was used to determine how well users understood availability, related text, and meanings of terms. The studies found that users had difficulty navigating the functions of the online public access catalog (OPAC) and could not easily differentiate among items that were immediately available, available in a few days, or available online as a preview.     

Google在医学全文信息获取中的应用

研究了Google搜索引擎的功能与特点,同时对网上医学全文信息的获取方法与技巧进行了探讨。     

Automating Reference Department Functions via an Electronic Spreadsheet

No abstract available for this article.     

搜索引擎的排序技术研究

提出按搜索引擎的排序技术把搜索引擎分为三代，介绍了主要的几种搜索引擎排序技术，并对第三代搜索引擎的发展进行了分析。     

我国互联网信息挖掘研究现状

在对信息挖掘与数据挖掘、信息挖掘与搜索引擎、信息挖掘技术总结的基础上, 对作者群和近几年发表论文的质量进行分析。