首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1718篇
  免费   39篇
教育   1387篇
科学研究   36篇
各国文化   33篇
体育   82篇
综合类   1篇
文化理论   8篇
信息传播   210篇
  2023年   11篇
  2022年   8篇
  2021年   21篇
  2020年   30篇
  2019年   51篇
  2018年   67篇
  2017年   87篇
  2016年   59篇
  2015年   38篇
  2014年   60篇
  2013年   452篇
  2012年   44篇
  2011年   37篇
  2010年   50篇
  2009年   48篇
  2008年   48篇
  2007年   44篇
  2006年   33篇
  2005年   39篇
  2004年   46篇
  2003年   32篇
  2002年   27篇
  2001年   30篇
  2000年   20篇
  1999年   23篇
  1998年   13篇
  1997年   21篇
  1996年   17篇
  1995年   23篇
  1994年   18篇
  1993年   22篇
  1992年   14篇
  1991年   23篇
  1990年   18篇
  1989年   11篇
  1988年   8篇
  1987年   9篇
  1986年   10篇
  1985年   7篇
  1984年   16篇
  1983年   11篇
  1982年   17篇
  1981年   8篇
  1980年   11篇
  1979年   10篇
  1977年   10篇
  1976年   8篇
  1975年   7篇
  1974年   11篇
  1973年   5篇
排序方式: 共有1757条查询结果,搜索用时 15 毫秒
1.
2.
Measuring Search Engine Quality   总被引:12,自引:3,他引:9  
The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures.  相似文献   
3.
4.
Book reviews     
Association of Research Libraries  相似文献   
5.
6.
Librarians have been struggling for years with the variety of issues arising while troubleshooting access to electronic journals. This article outlines the advantages and disadvantages of using a Customer Relations Management (CRM) software, originally designed for a call center, to communicate with patrons and track access issues. Utilizing the e-mail software used by the Reference Department at the University of South Florida, we assign incidents, correspond with patrons and staff, write internal notes, maintain transactions, and pull statistics. Hopefully, library vendors will develop software oriented to the needs of libraries to assist in managing access problems for e-journals.  相似文献   
7.
This study focused on a cohousing community's use of consensus to make a decision about surfacing a parking area. It revealed that the community's use of consensus decision making allowed the residents to balance three goals: making an appropriate decision, meeting members' needs, and maintaining the community's well-being. Reaching agreement, however, was complicated by members' value differences and discontinuity in their participation. The analysis of this case reveals three qualities characteristic of the enactment of consensus: the role of structured communication within and between group meetings, a tension between maintaining process openness and reaching decision closure, and the expectation that group members will work within the consensus process. The analysis also highlights the importance of timing in the interpretation of conflict in a consensus-oriented group and the role of process change when a group reaches the limits of members' commitment to consensus.  相似文献   
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号