Internet中文搜索引擎探析

随着Internet在全球广泛的应用,网络信息也随之大幅度增加。面对浩瀚的网络信息,如何能迅速准确地获取和利用自己需要的中文信息就成了一个大问题。目前解决这一问题的最佳途径就是使用搜索引擎。搜索引擎的使用已经成为中国当前第二大互联网应用(仅次于收发E-M ail)。它已成为网站建设的重要功能和网络信息挖掘的主要途径,为用户和网络信息源之间架起沟通的桥梁。搜索引擎就是利用自动抓取程序,在广域网或局域网上遍历各个结点使用全文检索技术对在各结点上抓取的信息进行分析,并加以索引、分类,建立相应的数据库,以备用户查询的一项信息…     

网络用户信息查寻行为研究述评

从3个方面对国内外网络用户信息查询行为研究领域的主要进展和热点问题进行评介，包括：①网络用户信息查寻行为的相关概念；②主要研究内容，包括用户利用搜索引擎的信息查寻行为研究、特定用户群体信息查询行为研究、用户个体差异对网络信息查寻行为的影响、网络用户信息查寻行为模型的构建；③研究方法，包括查询日志分析法、问卷法、访谈法、观察法、出声思维法。     

基于搜索引擎的数字图书馆智能信息检索

1 搜索引擎及其现实不足 1．1 搜索引擎及其分类 搜索引擎是用于帮助因特网用户查询信息的检索工作，它以一定的策略在因特网中搜集、发现信息，对信息进行理解、提取、组织和处理，并提供给用户，达到信息导航的目的。通常意义上的搜索引擎只是信息检索系统的前端，即面向用户的一面；而整个信息检索还包括系统后端的收集、索引信息等功能模块。从不同的角度来划分，搜索引擎有不同的类型：按其覆盖内容的范围来分，有通用型、专业型和特殊型;按是否有人参与索引来分，     

元搜索引擎的发展及其对数字图书馆的贡献

基于元搜索引擎的发展历史和特点,探讨了元搜索引擎对数字图书馆的贡献,同时剖析了元搜索引擎和数字图书馆建设中存在的一些问题,对不同数字图书馆中使用的元搜索引擎进行比较研究,在分析网络虚拟参考服务和用户信息需求行为的基础上,建立了基于网络计量学的个性化信息服务模式,旨在改进数字图书馆的功能、为各种各样的数据库和所有用户提供一站式检索服务.参考文献7.     

因特网上信息搜索引擎及搜索技巧

本文依据搜索引擎在网上获取信息及其提供服务的特点，对现有网络搜索引擎加以分类，并例举几种主要的信息搜索引擎，简述它们各自的特点，介绍利用这些搜索引擎获取网上信息的基本方法及技巧。     

搜索引擎中中文金融证券信息检索测试与评价

著者通过对具有代表性的搜索引擎在提供金融证券信息方面的性能进行测试与评价，从而得出综合性搜索引擎和专业性搜索引擎在提供信息方面的特征，以期使用户能够根据需要有针对性的选择搜索引擎，提高网上金融证券信息检索的相关性。     

信息检索和网络数据挖掘技术的比较分析

在信息量极大丰富的网络资源中，蕴含着大量潜在的有价值的知识。搜索引擎只解决了信息查询的问题，而网络数据挖掘是为了揭示数据中隐含的知识，它是比信息检索层次更高的一种技术。它能够根据用户定义的要求，根据目标特征信息在网络上或者数据库中进行有目的的信息检索。通过信息检索和网络数据挖掘的比较分析，以及搜索引擎的功能分析来阐述数据挖掘在搜索引擎基础上的作用发挥。     

国内中文搜索引擎的检索技巧

随着互联网的广泛应用,全球互联网用户正以每月超过10％的速度增长。其中互联网中的中文网页至今已达到70多万个,使用中文上网入数已超过千万。随着网络信息的增多,要快速准确检索到需要的信息就越加困难。人们常常把搜索引擎称为"上同第一站"、"网络之门",因此有必要掌握搜索引擎的使用和它们的一些网址。搜索引擎是用来对网络信息资源管理和检索的一系列软件。有的引擎采用主动搜寻的方式,即每隔一段时间就将搜寻到的网址存入可供查询的大型数据库中;有的引擎采用被动更新的方式,即由网址的拥有者自行将信息登录到数据库中。多数引…     

科技期刊应高度重视网络搜索引擎的影响和应用

一、网络搜索引擎对科技期刊的影响 网络搜索引擎是Internet上的一个网站,它的主要任务是在Internet中主动搜索其他Web站点中的信息并对其自动索引,其索引内容存储在可供查询的大型数据库中.当用户利用关键字查询时,该网站会告诉用户包含该关键字信息的所有网址,并提供通向该网站的链接.     

Google和Copernic Agent的网页搜索应用比较

互联网的普及和网络信息的大量增加,使网络信息资源检索越来越普及,促进了网络信息检索技术的不断发展。作为网络信息资源检索主要工具的搜索引擎和搜索代理技术也在进步和完善。Google和CopemicAgent分别是网络搜索引擎和搜索代理的典型代表,在网络信息搜索方面既有共性又有区别。文章主要从用户的角度对Google和CopemicAgent的信息检索方式、检索技巧、检索功能等三个方面进行比较。     

British Writings on Romania: From Travel Accounts to Studies

This article surveys a sample of sources of the information about Romania available to British readers in nineteenth century British newspapers and periodicals. It traces first contacts between the Romanian lands and Britain after the union of the principalities of Wallachia and Moldavia in 1859, then after their independence from the Ottoman Empire. The article highlights an increased Romanian interest in British periodicals, which reported and reviewed Romanian literature and scholarship. The article concludes that nineteenth century British newspapers and periodicals offer a great variety and wealth of new material previously unavailable or unknown to researchers. It also states that only a portion of a large quantity of this material has been indexed and is therefore available via the bibliographic sources mentioned in the article. The author argues for the need of a new and updated British-Romanian bibliography, which can draw on new online resources offering access to thousands of new newspapers and periodical records.     

Slavic Approval Plans: What Works and What Doesn't

ABSTRACT

The paper looks at library approval plans for material published in Slavic, East European, and Eurasian countries from the selector's point of view. Reasons why a selector would or would not want one are examined. Success with approval plans requires monitoring receipts, as well as good and ongoing communication among the selector, the acquistions department, and the vendor. A preliminary list of vendors offering approval plans for the countries of the region appears in the appendix.     

由“资源集聚”向“需求导向”转变——对武汉科技信息服务平台建设的思考

为进一步提升武汉科技信息共享服务平台使用效率,本文从平台资源建设、资源应用、供需对接方式和供需特点等方面分析了武汉科技信息资源服务现状;基于需求和利用的角度,结合平台管理实践和走访用户、问卷调查等研究方法,从信息资源需求主体和平台自身建设管理两个维度,找出制约科技资源供需对接的主要因素;以市场化和制度化为创新理念,从政策创新、机制创新、市场化服务、环境营造、人才培养等方面提出平台建设由“资源集聚”向“需求导向”转变的对策建议.     

Periodicals of Ethnic Minorities in Poland

ABSTRACT

The article examines the most important periodicals of ethnic minorities in Poland. After 1989, many ethnic groups (e.g., Germans and Romanies) were allowed to publish journals and newspapers for the first time since the end of World War II. The publications examined show the rich cultural life of the various ethnic groups as well as their current status in Poland. In addition to popular titles, some scholarly publications are also discussed.     

基于文献时间特征的学科主题演化分析方法研究 ——以图书情报学领域为例

在分析文献在不同研究阶段用词时间特征的倾向性基础上,提出一种基于主题模型的研究发展阶段识别方法。重点阐述该方法的构建过程,包括时间特征抽取、发展阶段界定、主题冷热变化分析等步骤。为验证该方法的有效性,针对词频统计法和主题模型方法在主题演化分析中的效果进行比较分析。结果表明,该方法能在识别主题热点和发展趋势的同时,有效地区分不同主题所反映的研究发展阶段。     

Politicking for the Public Library

ABSTRACT

In today's current political environment raising support for millage renewals, bond campaigns or even millage continuations for public libraries is affected by national politics, and a tendency towards tax aversion on principle across the country. The lessons we can learn from the governing boards of small and rural public libraries are worth raising up to a greater national consciousness. Board governance, community consciousness, and facilities management are clear and logical tools that elected boards of public libraries can use to politick for support of libraries.     

Reference Question Answered: Bibliographic Sources for the Ukrainian Periodical Press in the 1840s: Encyclopedias,Bibliographies, Guides,and Library Catalogs

The author answers a reference question on bibliographic sources for the Ukrainian periodical press 1840–1850. Helpful publications include bibliographies, guides, and library catalogs. These potentially make mention of revolutionary developments in Hungary (such as the Twelve Points paragraph of the Demands of the Hungarian Nation in March 1848, the subsequent April Laws, and Hungary's declaration of independence in April 1949), and elsewhere in the Hapsburg Empire.     

Device-Driven Research: The Impact of Chromebooks in American Schools

Chromebooks and the G Suite group of products, like Google Search, Gmail, and Google Docs, have rapidly expanded in American schools during the past 5 years. The impact of one-to-one Chromebook devices and the pervasive use of Google's software products in American education cannot be overstated. This article explores some of the influences of these products on research, based on the experiences of a librarian and technology coordinator at an elementary education level. The author has several suggestions for effective research with these products in mind.     

Authorship,Gender, and Institutional Affiliation in Library History:

Library historians can learn a great deal from studying the gender of authorship and institutional affiliation of a scholarly journal. The focus of this study is to examine these two aspects of journal production in library history to see who is producing published research in this field. Twenty-three years of Libraries & Culture were chosen as the target volumes. The study reveals that more men than women published in library history as well as locating which institutions were represented. This type of information is usedful to the library historian engaged in the analysis of published scholarship, and more generally to scholars with an interest in patterns of literature production in fields closely related to the social and behavioral sciences.     

Architectures of Knowledge and Literary Tradition: A History of the Almanac in Croatia

ABSTRACT

The history of the almanac in Croatia is reconstructed through primary research in bibliographic and archival sources. The almanac is a vehicle for knowledge communication in informal contexts, engaging both oral tradition and literary forms traceable to medieval literacy and ways of structuring knowledge. The history of the almanac in Croatia reflects the changing context of the book trade, literacy, and the evolution of language. Four main stages are identified: (1) the beginning of the annual almanac in the seventeenth century; astrological almanacs reflecting the sensibility of the Baroque period; (2) the Enlightenment's stimulation of almanac publishing in the spirit of contemporary secular reforms in agriculture and education; (3) nineteenth-and twentieth-century almanac trade, showing complex and overlapping networks for the production, distribution and appropriation of printed almanacs;(4) roughly the end of World War II, when the almanac slowly moved out of the role of a popular mass medium and into specialized niches represented by regional, diaspora, and religious almanacs.