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1.
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。  相似文献   

2.
Google Scholar对MEDLINE数据库的检索性能测评   总被引:5,自引:0,他引:5  
文章以Google Scholar检索MEDLINE数据的检索结果和PubMed的检索结果进行对比分析,以帮助用户正确认识使用Google Scholar.  相似文献   

3.
Google学术搜索及其在课题检索中的应用   总被引:1,自引:0,他引:1  
Google学术搜索为用户提供了一个免费、自由、简便的检索平台,在检索专业文献方面具有独特的优势.本文结合实际课题阐述了Google学术搜索在信息检索中的应用.  相似文献   

4.
网络搜索引擎评价   总被引:14,自引:1,他引:14  
从检索功能(如布尔检索、邻近检索、截词检索等)、查准率、用户负担、输出方式上比较了Google 和Ask Jeeves 两大搜索引擎的检索性能, 测试研究发现Google 在查准率以及输出方式上明显地优于Ask Jeeves, 而在检索功能及用户负担上两者各有特色。在比较评价的同时, 提出了一套实用的搜索引擎检索性能评价方案。  相似文献   

5.
近期.中国国家图书馆对外开放了针对馆藏的检索.读者通过Google Scholar(学术资源搜索)就可以检索到国家图书馆的书目数据,国家图书馆由此成为中国第一个加入Google Scholar的LibraryLink(图书馆链接)的图书馆,实现了国家图书馆数字资源门户与Google Scholar的链接。  相似文献   

6.
李苗 《图书馆学研究》2012,(12):44-49,55
文章采用网络调查及文献调研法,从图片检索、音乐检索和视频检索三方面对中国的百度、Sogou和Soso,韩国的Naver、Nate和Daum,美国的Google和Yahoo!八大搜索引擎提供的多媒体检索服务进行分析与测评。调查结果显示,Yahoo!不提供音乐检索,其余调查对象都提供图片检索、视频检索和音乐检索三项服务。大多数搜索引擎公司的图片检索和视频检索都支持高级检索功能,Daum导入了语义检索,Google和Yahoo!引入了安全检索服务过滤有害信息。  相似文献   

7.
基于Google学术搜索与中国引文数据库的引文检索比较分析   总被引:2,自引:0,他引:2  
基于引文检索的Google学术搜索与中国引文数据库的异同点,比较两者检索功能的强弱,评价两者的检索效果,认为:中国引文数据库的引文检索功能较强,检索效果良好;Google学术搜索优势在于能够检索图书和内部刊物被引情况,两者结合使用才能全面评价学术文献的价值。最后,对两者的发展趋势作出预测。  相似文献   

8.
Google scholar搜索引擎特征研究   总被引:3,自引:0,他引:3  
本文分析了Google scholar的资料来源、检索策略、检索结果显示等特征,并主要从引文数据库角度评价其检索优劣势,谈其发展前景.  相似文献   

9.
陈阳 《电子出版》2003,(7):60-62
Google(www.google.com)是目前世界上最优秀的搜索引擎之一。这个由两位斯坦福大学的博士生1998年研发的搜索引擎,凭借其简捷、迅速而又准确的检索功能,在推出后不久便获得了数以亿计的互联网用户的认同。“Google”一词来源于英文单词“googol”,它指代1后边带有100个零的数字,显示了Google“征服网上无穷无尽资料的雄心”。如今,Google已经是全球访问量第四的网站,它的数据库中收录了10亿多个网址和30多亿的网页,每天为用户提供高达两亿次的信息查询服务。Google目前已将其技术许可证颁发给了30多个国家和地区的120多家公司,我们所熟知的美国在线、雅虎、网景等著名网站,采用的都是Google提供的搜索引擎技术。 自2002年9月Google开始支持简、繁体中文时起,中文Google在中国内地的人气便急剧攀升,用户数量迅速增长。雅虎中文、网易等国内门户网站也纷纷采用Google的搜索引擎技术。Google搜索引擎主要  相似文献   

10.
Google搜索引擎及其技术简介   总被引:19,自引:2,他引:17  
搜索引擎已经成为人们网络:生活必不可少的工具,因此,国内外的各种搜索引擎纷纷出现。而Google搜索引擎以其雄厚的技术为支撑,凭借其强大的检索功能和高质量的检索服务,逐渐吸引和留住了世界各地的大量网民,成为了世界上最著名的搜索引擎之一。本文在介绍Google基本概况、检索特色及特色功能的基础上,介绍了其核心技术及工作机理,最后对其发展趋势作了分析。  相似文献   

11.
[目的/意义] 建构云计算技术环境下的海量数据分析是一种需要预载大量数据集的数据计算处理。针对传统海量数据分析处理数据细节方式所导致的分析质量与效率问题,运用Google三大云计算技术对其进行改进。[方法/过程] 通过对Google三大云计算技术——GFS、MapReduce和Bigtable进行文献调查、内容分析和技术分析,梳理出Google云计算技术在数据处理、技术架构和算法模型等方面的部署创新和设计改进。[结果/结论] 将Google云计算技术与传统本地数据分析处理方式与细节进行比较分析,得出Google云计算技术在操作海量数据分析时所具备的处理优势。借助Google云计算三大技术,提出海量数据分析流程在存储和访问、组织与管理以及并行处理3个方面的技术优化与改进策略。  相似文献   

12.
On March 17, 2010, the United States Federal Communications Commission identified broadband as “the great infrastructure challenge of the early twenty-first century.” One month earlier, on February 10, 2010, in anticipation of the FCC's announcement, Google announced its intent to build ultra-high-speed broadband networks across the United States to serve as a model for overcoming this challenge. Since then, Google Fiber, as it is called, has succeeded in being recognized as a model for other communities interested in establishing ultra-high-speed broadband infrastructure. This article serves as an analysis of the political economic consequences of this particular configuration of broadband infrastructure, and argues that Google Fiber operates as a mechanism of flexible capital whereby the emphases on short- over long-term relationships, meritocracy over craftsmanship, and the devaluation of past experience in favor of potential outcomes are embedded in the institutional and technical infrastructure of ultra-high-speed Internet.  相似文献   

13.
Google和百度两种搜索引擎比较研究   总被引:2,自引:0,他引:2  
从索引数据库、信息检索功能和检索结果等方面对两种著名的搜索引擎Google 和百度进行了详细比较,为用户更好地利用搜索引擎提供参考。并提出两者有待进一步完善的技术建议。  相似文献   

14.
从PageRank的技术优势看Google的软件文化理念   总被引:5,自引:0,他引:5  
张谦 《图书馆论坛》2004,24(3):89-91
通过研究全球最大的搜索引擎Google的PageRank技术工作原理以及Google的功能特点,论述了Google获得成功的关键是以网民为市场主体的人本主义文化理念运作模式的观点,并通过分析Google面临的问题和危机,描述了搜索引擎技术市场的潜在走势。  相似文献   

15.
This article critically examines four Google search products (Google Advanced Search, Google News Advanced Search, Google Books Advanced Search, and Google Advanced Scholar Search) and shows how each uses metadata to enhance or improve search results. In addition, the article shows how metadata can increase search precision and recall in information discovery systems. From a library perspective, this article analyzes some of the metadata-enabled features of Google's advanced search pages and compares these features to those found in a typical online library catalog. From a serials perspective, Google News Advanced Search demonstrates how Google indexes news websites, sites that are essentially continuing resources. As Google incorporates more and more metadata functionality into its advanced search pages, they increasingly begin to function more like online library catalogs and less like search pages found in a traditional Internet search engine. The simple search box has many limitations, and like libraries, Google is increasingly creating and offering metadata-enabled search features that improve search precision and recall in its products.  相似文献   

16.
This study measured the degree of Google Scholar adoption within academia by analyzing the frequency of Google Scholar appearances on 948 campus and library Web sites, and by ascertaining the establishment of link resolution between Google Scholar and library resources. Results indicate a positive correlation between the implementation of Google Scholar link resolution and the degree of Google Scholar adoption.  相似文献   

17.
《图书馆管理杂志》2013,53(3-4):191-206
SUMMARY

Buoyed by its brand name, Google News has grown from its beta stage into a popular news site with a significant share of the Internet market for “Current Events and Global News.” The success of Google News raises questions about the nature of news and even the desirability of Google's presenting news. Where does Google News fit into the myriad news resources available on the Internet and in libraries? How does Google News work? Is Google News an effective source for news research? How will Google News stand up to its competition, in particular a new wave of community news sites?  相似文献   

18.
用Delphi和Google Web API开发自己的搜索引擎   总被引:1,自引:0,他引:1  
简述Delphi是Google Web API提供的一种Web服务,允许开发人员选择自己喜爱的编程语言开发应用程序,通过基于XML的SOAP信息交换协议与远程的Google服务器连接来调用Google的Web服务;通过实例详细介绍用Delphi和GoogleWeb API开发搜索引擎的方法和步骤。  相似文献   

19.
ABSTRACT

In order to understand better and explain the practices of Google Scholar, this essay takes a rhetorical and holistic look at the search technology, language, and sociopolitical implications of the Google Scholar interface as well as the connection between Google Scholar and the actions of the Google Corporation. The relationship between Google Scholar and the academic library is also explored. In addition, the essay offers ways to encourage students to undertake this kind of critique in the information literacy classroom.  相似文献   

20.
Google Scholar is a free service that provides a simple way to broadly search for scholarly works and to connect patrons with the resources libraries provide. The researchers in this study analyzed Google Scholar usage data from 2006 for three library tools at San Francisco State University: SFX link resolver, Web Access Management proxy server, and ILLiad interlibrary loan server. Overall, the data suggested that Google Scholar had become a very useful resource in the library and was a significant addition to the library's collection of research databases. SFX data revealed requests from Google Scholar grew ten-fold from 2006 to 2011, and that Google Scholar became the top-ranked SFX source for requests in 2011. Library patrons favored Google Scholar over San Francisco State University's federated search tool, MetaLib, and it has become an important source for interlibrary loan requests. Analysis of San Francisco State University usage data will assist other libraries in their decisions about the implementation of Google Scholar.  相似文献   

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