共查询到19条相似文献，搜索用时 589 毫秒
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Google为用户提供了多种检索功能,但这些检索功能的性能如何却少见于相关文献中。作者对Google的两种较为独特的检索功能进行了评析,分别是相似检索和链接检索,并以普通检索作为评价的标准。本文采用了20个检索式和20个目标网页,对相似检索、链接检索和普通检索的检索性能差异性进行了评价。研究中主要利用单因素方差分析法和回归分析法。研究结果显示普通检索表现最好。研究成果能帮助用户对相似检索和链接检索有较为清晰的认识,并且可以了解Google在这两种检索功能上所表现出的不同的检索性能。 相似文献
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中文Google和百度的排序方式与检索效率比较分析 总被引：1，自引：0，他引：1
中文Google和百度是大陆网民最常使用的两个中文搜索引擎，因此对其检索效率的比较分析就显得格外重要。而检索结果的排序是影响检索效率的关键因素。因为根据统计很多网络用户只有耐心看检索结果的前5页。本文在概括介绍目前搜索引擎采用的三种结果排序规则：地点和频率法、人气质量定律、自信心定律的基础上。比较分析了中文Google和百度的排序技术。最后笔者通过检索实践得出结论，中文Google和百度各有所长，但是在检索效率上尤其是检索结果的有效性上，中文Google比百度要好。 相似文献
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搜索引擎Google的检索功能及PageRank技术分析 总被引：7，自引：0，他引：7
本文介绍了搜索引擎Google的特点和检索功能，并重点介绍了其PageRank专利技术的概念及计算方法。 相似文献
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Google scholar检索英文文献的技巧探析 总被引：1，自引：0，他引：1
以查找“外商直接投资进入模式的理论研究”的英文文献为例，探析Google scholar的检索技巧，表明如何从有限的信息出发，通过观察和分析检出结果，运用检索技巧，实现检索目的。 相似文献
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基于Google学术搜索的引文检索研究 总被引：7，自引：1，他引：7
在分析搜索引擎新进展的基础上，简要介绍了Google学术搜索的基本情况，并从关键词检索、作者检索和学术高级检索等方面详细地介绍了Google学术搜索的引文检索新功能，指出了其不足之处，提出了一些改进其质量的措施。 相似文献
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四种搜索引擎的比较研究 总被引：12，自引：0，他引：12
本文对目前常用的4种中文搜索引擎：Google、百度、天网、Openfind的索引数据库收录范围、检索功能、检索结果显示格式、用户界面等方面进行了比较分析，并指出它们各自的优势与不足。 相似文献
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本文通过利用Google Scholar、EI和SCIE的作者检索功能,对这3种检索工具的检索结果进行了比较分析。研究表明Google Scholar是比较权威和全面的免费学术检索工具,但Google Scholar在中文学术文献检索中文献重复率高达2837%,且由于来源数据库的局限,文献的漏检现象比较严重。 相似文献
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Google Schdar一经推出．立即就受到用户青睐，获得市场巨大成功。本文从Google Scholar网站市场定位、资源优势、检索功能和学术价值四个方面分析了其成功因素。对于人们正确认识和使用Coode Scholar具有重大意义。 相似文献
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Query suggestion is a common feature of many information search systems. While much research has been conducted about how to generate suggestions, fewer studies have been conducted about how people interact with and use suggestions. The purpose of this paper is to investigate how and when people integrate query suggestions into their searches and the outcome of this usage. The paper further investigates the relationships between search expertise, topic difficulty, and temporal segment of the search and query suggestion usage. A secondary analysis of data was conducted using data collected in a previous controlled laboratory study. In this previous study, 23 undergraduate research participants used an experimental search system with query suggestions to conduct four topic searches. Results showed that participants integrated the suggestions into their searching fairly quickly and that participants with less search expertise used more suggestions and saved more documents. Participants also used more suggestions towards the end of their searches and when searching for more difficult topics. These results show that query suggestion can provide support in situations where people have less search expertise, greater difficulty searching and at specific times during the search. 相似文献
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This paper investigates the influence of user characteristics (e.g. search experience and cognitive skills) on user effectiveness. A user study was conducted to investigate this effect, 56 participants completed searches for 56 topics using the TREC test collection. Results indicated that participants with search experience and high cognitive skills were more effective than those with less experience and slower perceptual abilities. However, all users rated themselves with the same level of satisfaction with the search results despite the fact they varied substantially in their effectiveness. Therefore, information retrieval evaluators should take these factors into consideration when investigating the impact of system effectiveness on user effectiveness. 相似文献
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This paper reports results from a study exploring the multimedia search functionality of Chinese language search engines. Web searching in Chinese (Mandarin) is a growing research area and a technical challenge for popular commercial Web search engines. Few studies have been conducted on Chinese language search engines. We investigate two research questions: which Chinese language search engines provide multimedia searching, and what multimedia search functionalities are available in Chinese language Web search engines. Specifically, we examine each Web search engine’s (1) features permitting Chinese language multimedia searches, (2) extent of search personalization and user control of multimedia search variables, and (3) the relationships between Web search engines and their features in the Chinese context. Key findings show that Chinese language Web search engines offer limited multimedia search functionality, and general search engines provide a wider range of features than specialized multimedia search engines. Study results have implications for Chinese Web users, Website designers and Web search engine developers. 相似文献
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Drawing on the ideas of the Sense-Making approach, the ways in which people face and bridge gaps in Web searching are analyzed. The empirical study is based on videotaped Web searches conducted by seven participants. Altogether 11 gaps and 13 search tactics of various types were identified. The gaps faced by the searchers originated from three major factors: problematic content of information, insufficient search competence and problems caused by the search environment. Of individual gaps, no relevant material available, inaccessible content and confusion were most frequent. Of the search tactics used in gap-bridging, following links and activating the Back button were most popular. Gaps related to the problematic content of information led the informants to redirect the search to find Web pages that focus better on the search topic. If the movement was stopped by insufficient search competence, the searchers tended to return to material that was familiar from earlier use contexts in order to regain control of the search process. Alternatively, they tried to specify the search terms. In cases where the search was interrupted by technical problems or other factors originating from the search system, gap-bridging aimed at returning to familiar and technically reliable links. The Sense-Making theory provides relevant conceptual tools to approach the dynamic and discontinuous nature of Web searching in terms of gap-facing and gap-bridging. The concept of gap-facing enables a context-sensitive analysis of the ways in which Web search processes may be stopped. Gap-bridging indicates a general level motive to find alternative ways to continue searching. 相似文献
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Categorized overviews of web search results are a promising way to support user exploration, understanding, and discovery. These search interfaces combine a metadata-based overview with the list of search results to enable a rich form of interaction. A study of 24 sophisticated users carrying out complex tasks suggests how searchers may adapt their search tactics when using categorized overviews. This mixed methods study evaluated categorized overviews of web search results organized into thematic, geographic, and government categories. Participants conducted four exploratory searches during a 2-hour session to generate ideas for newspaper articles about specified topics such as “human smuggling.” Results showed that subjects explored deeper while feeling more organized, and that the categorized overview helped subjects better assess their results, although no significant differences were detected in the quality of the article ideas. A qualitative analysis of searcher comments identified seven tactics that participants reported adopting when using categorized overviews. This paper concludes by proposing a set of guidelines for the design of exploratory search interfaces. An understanding of the impact of categorized overviews on search tactics will be useful to web search researchers, search interface designers, information architects and web developers. 相似文献
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Current Web-based search engines presume a category search for a specific group of users. This approach is appropriate for generalized information searches since it is based on statistically generated user profiles. However, in some applications, such as medicine and law, an individualized search for a specific user at a given point in time is desired. In addition, the use of specialized terminology in some fields necessitates guidance for the non-expert to be successful in locating the desired information. This paper presents a new decision support system enabled by the analytic hierarchy process and intelligent software agents that can be used by researchers and practitioners in technical fields to aid information retrieval and improve search results from a controlled vocabulary. An application from telemedicine is given to illustrate the potential improvements. 相似文献
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模式搜索方法(pattenrsearch)是求解最优化问题的一种直接搜索方法,它不要求目标函数必须可微或者连续,是求解不可导或求导代价较大的最优化问题的一种有效方法。介绍了模式搜索法的原理与改进,以及Matlab模式搜索工具箱应用实例 相似文献
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"中文雅虎"和"航海导航"应用分析 总被引：1，自引：0，他引：1
文章通过简要描述"中文雅虎"和"航海导航"引擎的特性,揭示了搜索引擎内在本质.使用户能够较全面地了解中文搜索引擎的功能特点. 相似文献