共查询到19条相似文献，搜索用时 199 毫秒
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论文通过Yahoo！和Bing搜索引擎获取30个网络社区网站的网页总数、链接总数、内、外部链接数、PR值,并计算了网络影响因子等,运用灰色关联分析对以上多项链接指标数据进行综合排序。研究结果表明:这30个网络社区网站网络影响力前几位是:51.com、腾讯微博、腾讯博客、腾讯论坛、网易微博、网易博客、新浪博客、豆瓣网。最后通过对比Yahoo!和Bing搜索引擎获取的链接数据,验证了两大搜索引擎对于网站链接分析是可行的,但是用Yahoo搜索引擎统计的数据来分析更为准确一些。 相似文献
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从Google、Yahoo!、LII等综合性搜索引擎、IP—Discover、德温特、Dialog数据库等专利搜索引擎、北卡罗莱纳州立大学图书馆和大英图书馆等专利信息导航、日本专利局工业产权数字图书馆等专利数字图书馆等4个方面深入揭示专利信息的检索策略。 相似文献
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网络检索工具的比较研究 总被引：6，自引：2，他引：6
本文从信息收集方法、索引范围与检索方法、检索结果格式三个方面对Lycos、AltaVista、Excite、OpenText、Yahoo、Magellan六个网络检索工具进行了比较研究，在此基础上指出了未来网络检索工具在这三个方面所应做出的改进。 相似文献
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以Google为代表的搜索引擎和以Yahoo!为代表的网站目录是目前互联网用户获取信息的基本方式。本文从互联网的出现及网络信息检索的历史出发，通过对搜索引擎和网站目录在基本设计思想、商业化影响等方面的分析．尝试提出了一种新的网络检索系统的构想。 相似文献
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概括了国外图书馆学情报学网络资源的现状，介绍了国外图书馆学情报学网络信息资源的获取。列举了Yahoo搜索引擎分类目录中的图书馆学情报学专业信息；选取介绍了图书馆学情报学期刊目录等4个图书馆学情报学学科导航系统；以及重点介绍了图书馆学情报学文献等4个图书馆学情报学数据库。全文最后提出了国外图书馆学情报学网络资源存在的问题。 相似文献
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国外网络巨头进驻中国,都遇到了一个谁都无法忽略的问题——本土化,这似乎已经成为中国市场对国外企业(尤其是互联网企业)的一个紧箍咒这几乎成为中国互联网界的一个惯例——每当有国外著名品牌进入中国的时候,都将遭受到普遍的质疑,而且质疑最多的是,该品牌是不是适合中国国情。Yahoo 相似文献
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基于RSS技术的个性化信息服务新方式--由雅虎看RSS在搜索引擎中的应用 总被引：12，自引：2，他引：12
雅虎公司于2004年2月推出了自主开发的新一代搜索引擎,其中最令人瞩目的是其MyYahoo!个性化信息服务方式,这种新服务方式基于RSS技术。本文将通过对雅虎的MyYahoo!项目的实证研究,探讨这种技术在搜索引擎中的应用原理。 相似文献
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In this article, the authors analyze the popular search queries used in Google and Yahoo! over a 24-month period, January 2004–December 2005. They develop and employ a new methodology and metrics to examine and assess the digital divide in information uses, looking at the extent of political searches and their accuracy and variety. The findings indicate that some countries, particularly Germany, Russia, and Ireland, display greater accuracy of search terms, diversity of information uses, and sociopolitical concern. Also, in many English-speaking and Western countries most popular searches were about entertainment, implying a certain gap within these countries between the few who search for economic and political information and the many who do not. 相似文献
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A visual display of the most important universities in the world is the aim of this paper. It shows the topological characteristics and describes the web relationships among universities of different countries and continents. The first 1000 higher education institutions from the Ranking Web of World Universities were selected and their link relationships were obtained from Yahoo! Search. Network graphs and geographical maps were built from the search engine data. Social network analysis techniques were used to analyse and describe the structural properties of the whole of the network and its nodes. The results show that the world-class university network is constituted from national sub-networks that merge in a central core where the principal universities of each country pull their networks toward international link relationships. The United States dominates the world network, and within Europe the British and the German sub-networks stand out. 相似文献
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Allan J.C. Silva Marcos André Gonçalves Alberto H.F. Laender Marco A.B. Modesto Marco Cristo Nivio Ziviani 《Information processing & management》2009
This article proposes a process to retrieve the URL of a document for which metadata records exist in a digital library catalog but a pointer to the full text of the document is not available. The process uses results from queries submitted to Web search engines for finding the URL of the corresponding full text or any related material. We present a comprehensive study of this process in different situations by investigating different query strategies applied to three general purpose search engines (Google, Yahoo!, MSN) and two specialized ones (Scholar and CiteSeer), considering five user scenarios. Specifically, we have conducted experiments with metadata records taken from the Brazilian Digital Library of Computing (BDBComp) and The DBLP Computer Science Bibliography (DBLP). We found that Scholar was the most effective search engine for this task in all considered scenarios and that simple strategies for combining and re-ranking results from Scholar and Google significantly improve the retrieval quality. Moreover, we study the influence of the number of query results on the effectiveness of finding missing information as well as the coverage of the proposed scenarios. 相似文献
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Xiao-Ling Jin Zhongyun Zhou Matthew K.O. Lee Christy M.K. Cheung 《International Journal of Information Management》2013
This study theorized and validated a model of knowledge sharing continuance in a special type of online community, the online question answering (Q&A) community, in which knowledge exchange is reflected mainly by asking and answering specific questions. We created a model that integrated knowledge sharing factors and knowledge self-efficacy into the expectation confirmation theory. The hypotheses derived from this model were empirically validated using an online survey conducted among users of a famous online Q&A community in China, “Yahoo! Answers China”. The results suggested that users’ intention to continue sharing knowledge (i.e., answering questions) was directly influenced by users’ ex-post feelings as consisting of two dimensions: satisfaction, and knowledge self-efficacy. Based on the obtained results, we also found that knowledge self-efficacy and confirmation mediated the relationship between benefits and satisfaction. 相似文献
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共链分析是将共引理论应用到网络链接结构分析中,揭示出网络社区网站间的链接关系,挖掘隐藏在链接关系背后的规律及网络特征。本文选取了具有代表性的30个网络社区网站作为研究对象,利用搜索引擎yahoo!和Bing收集了这30个网络社区的共链数,然后经过处理后用SPSS和UCINET6软件分别做出多维尺度图和社会网络图谱,通过对共链数据的聚类和可视化分析,得出这30个社区网站相互之间的关系及其聚类关系。 相似文献
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In this paper, we propose a generative model, the Topic-based User Interest (TUI) model, to capture the user interest in the User-Interactive Question Answering (UIQA) systems. Specifically, our method aims to model the user interest in the UIQA systems with latent topic method, and extract interests for users by mining the questions they asked, the categories they participated in and relevant answer providers. We apply the TUI model to the application of question recommendation, which automatically recommends to certain user appropriate questions he might be interested in. Data collection from Yahoo! Answers is used to evaluate the performance of the proposed model in question recommendation, and the experimental results show the effectiveness of our proposed model. 相似文献