共查询到20条相似文献，搜索用时 15 毫秒
1.
Ripple AS 《Medical reference services quarterly》2006,25(2):97-107
Google is the search engine of choice for most Internet users. For a variety of reasons, librarians and other expert searchers do not always use Google to its full potential, even though it provides capabilities not possible in traditional bibliographic databases and other search engines. Applying expert searching principles and practices, such as the use of advanced search operators, information retrieval strategies, and search hedges to Google will allow health sciences librarians to find quality information on the Internet more efficiently and effectively. 相似文献
2.
《Medical reference services quarterly》2013,32(2):97-107
Abstract Google is the search engine of choice for most Internet users. For a variety of reasons, librarians and other expert searchers do not always use Google to its full potential, even though it provides capabilities not possible in traditional bibliographic databases and other search engines. Applying expert searching principles and practices, such as the use of advanced search operators, information retrieval strategies, and search hedges to Google will allow health sciences librarians to find quality information on the Internet more efficiently and effectively. 相似文献
3.
The authors of this paper investigated the impact of the advanced search features of three common search engines on retrieval result performance: Yahoo, Google, and Live Search. The authors analyzed 240 search queries with different information need emphases to determine retrieval effectiveness differences among regular search, title search, exact phrase search, and PDF file format restriction search. A one-way ANOVA method and regression analysis method were used for the study. It was found that the PDF file format restriction search achieved the best retrieval performance among Yahoo, Google and Live Search. The regular search achieved the best web page ranking performance among Yahoo, Google, and Live Search. The findings of this study can be used to assist users in formulating an appropriate search strategy to improve search effectiveness, and to shed light on how search engines react to different types of search features in terms of retrieval effectiveness. 相似文献
4.
The authors of this paper investigated the impact of the advanced search features of three common search engines on retrieval result performance: Yahoo, Google, and Live Search. The authors analyzed 240 search queries with different information need emphases to determine retrieval effectiveness differences among regular search, title search, exact phrase search, and PDF file format restriction search. A one-way ANOVA method and regression analysis method were used for the study. It was found that the PDF file format restriction search achieved the best retrieval performance among Yahoo, Google and Live Search. The regular search achieved the best web page ranking performance among Yahoo, Google, and Live Search. The findings of this study can be used to assist users in formulating an appropriate search strategy to improve search effectiveness, and to shed light on how search engines react to different types of search features in terms of retrieval effectiveness. 相似文献
5.
This article reports a survey on the use of Internet services and resources in the engineering colleges of Punjab and Haryana states of India. Data were collected by using a questionnaire and follow-up interviews with Internet users, i.e. teachers and students of engineering colleges. The response rate was 80.8%. Results showed that all the respondents make frequent use of the Internet because they have access either at college or at home. The survey revealed that the majority of the respondents, i.e. 65.6%, access the Internet from college or their workplace. More than 75% of the respondents use the Internet services mainly for educational and research purposes. Google and Yahoo search engines are found to be more widely used than other search engines. More than 70% of the respondents feel that the Internet is useful, informative, easy to use, inexpensive and time saving. 相似文献
6.
This article reports a survey on the use of Internet services and resources in the engineering colleges of Punjab and Haryana states of India. Data were collected by using a questionnaire and follow-up interviews with Internet users, i.e. teachers and students of engineering colleges. The response rate was 80.8%. Results showed that all the respondents make frequent use of the Internet because they have access either at college or at home. The survey revealed that the majority of the respondents, i.e. 65.6%, access the Internet from college or their workplace. More than 75% of the respondents use the Internet services mainly for educational and research purposes. Google and Yahoo search engines are found to be more widely used than other search engines. More than 70% of the respondents feel that the Internet is useful, informative, easy to use, inexpensive and time saving. 相似文献
7.
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。 相似文献
8.
《Journal of Web Librarianship》2013,7(4):375-376
Libraries today face an increasing challenge: to provide relevant information to diverse populations with differing needs while competing with Web search engines like Google. In 2009, a large group of libraries, including the University of Nebraska-Lincoln Libraries, joined with Innovative Interfaces as development partners to design a new type of discovery tool. The concept of information portals best supports the research and instructional needs of our communities by organizing and presenting information that incorporates licensed databases, text, multimedia, and other relevant sources. The discovery tool under examination by University of Nebraska-Lincoln and Encore integrates searches of the catalog, locally created full-text and image sources, and articles from licensed databases with navigation options that facilitate narrowing and expanding search results. This information portal development is an ongoing process with the goal of providing a tool that is as easy to use as Web search engines and that preserves the quality that library users expect. This article explores the requirements for an information portal and describes the challenges University of Nebraska-Lincoln faced when implementing Encore. Statistics from the initial implementation are presented, along with recommendations for future usability studies to evaluate where additional improvements should be made. 相似文献
9.
本文对国外知名的图像搜索引擎Google、Picsearch和Metacrawler的界面设计、检索功能、检索结果、检索效果进行比较分析，并在此基础上总结出对我国发展中文图像搜索引擎的几点启示。 相似文献
10.
基于FAHP的图像搜索引擎性能评价 总被引：2，自引：0，他引：2
从搜索范围、界面设计、检索功能和用户支持度等6个角度提出图像搜索引擎性能评价体系,运用模糊层次分析法,对Google、Ditto和百度的性能进行定量评价,得出Google>Ditto>百度的结论,并认为利用FAHP对图像搜索引擎进行性能评价具有一定的可行性和合理性,若与定性分析相结合将有助于评价准确性的提高。 相似文献
11.
12.
综合性学术搜索引擎研究 总被引：8，自引：1，他引：8
选择了四种当前国外典型的可免费使用的综合性学术搜索引擎Google Scholar、Scir-us、BASE、Athenus进行了研究,分析了各自的特色,对比了它们的资源覆盖范围、检索功能和检索效果,提出了当前这类学术搜索引擎存在的主要问题:资源的学术质量问题、检索结果的归并与去重问题、相关性排序问题。在此基础上,探讨了其对图书情报机构、用户和资源供应商的有利和不利的影响。 相似文献
13.
The literature shows that students are more likely to begin their search via Google, as it is perceived to be easier and more accessible than other databases or publisher platforms. The invisible web, specifically publisher platforms, is sometimes too difficult for students to access; there are also suggestions that Google Scholar in particular may outperform other paid-for databases. The ease of access and the somewhat misguided notion that Google Scholar has more reliable information than that provided by libraries makes search engines all the more attractive. This culture of searching using a single search box is reflected in the increase in the number of libraries opting for single resource discovery systems such as Summon or Primo, which use a single search covering all the library holdings. The findings suggest that whilst Google Scholar can perform well in some circumstances, it performed only moderately well when compared with LISTA and Summon – the single resource discovery system tested. It was the least successful resource in terms of precision when compared with LISTA, Summon, Emerald and Sage. However, the simplicity of search engines begs the question: will databases and publisher platforms become obsolete? The study concludes that subject specific databases are more effective than search engines, but the complexity of accessing the invisible web is hindering their popularity. 相似文献
14.
大学生信息检索能力调查分析 总被引：11，自引：0，他引：11
以大学本科生为研究对象,通过对他们在信息检索过程中使用工具和检索结果判断依据的调查探寻现今本科生信息素养的状态及其改善手段。通过实地问卷调查的方法,最终在北京大学回收了259份有效问卷。经过严格的数据清洗,使用描述统计和拟合优度分析的结果显示:本科生检索方法手段单一;使用搜索引擎查找生活、娱乐类信息,对搜索引擎的易用性的判断高于OPAC和数据库;无论是检索字段的使用还是对检索结果的判定,其所凭借和依据的字段或内容均很少。针对信息检索教育培训的力度不足的现状,提出从搜索引擎的使用入手,在日常的教学中引导学生养成良好的信息获取习惯并辅以一定的教育和训练是改善这种现状的可能手段。为了解大学生信息素养的现状提供了一手分析结果,同时为改善大学生信息素养现状提出了建设性的意见。 相似文献
15.
WWW信息检索技巧 总被引：17，自引：2，他引：15
雷燕 《现代图书情报技术》1998,14(6):39-42
World Wide Web 上存储着大量图文声像并茂的有价值的信息。如何快速、准确地从浩如烟海的信息资源中找到自己最需要的信息一直是网络用户利用信息的最大困难。本文分析了WWW 信息检索困难的原因, 介绍了几种重要的中英文探索引擎, 从查全、查准和加快检索速度等几方面总结了WWW 信息检索的技巧。 相似文献
16.
17.
搜索引擎的最新进展述要 总被引：1，自引：0，他引：1
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. 相似文献
18.
19.
20.
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