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   4904篇
  免费   68篇
  国内免费   10篇
教育   3705篇
科学研究   247篇
各国文化   45篇
体育   421篇
综合类   4篇
文化理论   62篇
信息传播   498篇
  2023年   13篇
  2022年   29篇
  2021年   52篇
  2020年   75篇
  2019年   123篇
  2018年   163篇
  2017年   175篇
  2016年   175篇
  2015年   106篇
  2014年   142篇
  2013年   1009篇
  2012年   145篇
  2011年   145篇
  2010年   160篇
  2009年   143篇
  2008年   165篇
  2007年   149篇
  2006年   114篇
  2005年   100篇
  2004年   104篇
  2003年   88篇
  2002年   103篇
  2001年   72篇
  2000年   114篇
  1999年   78篇
  1998年   75篇
  1997年   67篇
  1996年   73篇
  1995年   59篇
  1994年   70篇
  1993年   65篇
  1992年   50篇
  1991年   72篇
  1990年   52篇
  1989年   52篇
  1988年   38篇
  1987年   47篇
  1986年   46篇
  1985年   42篇
  1984年   47篇
  1983年   39篇
  1982年   33篇
  1981年   33篇
  1980年   30篇
  1979年   22篇
  1978年   29篇
  1977年   36篇
  1976年   27篇
  1975年   20篇
  1974年   22篇
排序方式: 共有4982条查询结果,搜索用时 293 毫秒
1.
Cultural Studies of Science Education - In this paper, I engage with arguments put forth by Anna Günther-Hanssen in her article “A swing and a child: How scientific phenomena can come to...  相似文献   
2.
3.
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   
4.
5.
6.
The Copyright Licensing and Administration Society of Singapore was established in 1999. It is now profitable and commercially significant, perhaps uniquely so in Asia. Critical factors in its growth have included a statutory (non‐voluntary) photocopying licence provision for educational institutions in the Copyright Act; and widespread support from the local and international communities of rightsholders. Tentative consensus has been established with educators over a fair level of remuneration for copying. Further work needs to be done to extend or amend the current model for electronic copying, for the private sector and for other countries in the region.  相似文献   
7.
During the rewriting of its program in the early 1980s, theRassemblement pour la République (RPR) carried out anumber of opinion surveys. The person in charge of this wasnot a member of the inner leadership circle; he warned the partyleader, Jacques Chirac, that themes forming a coherent ‘liberal’program for the transformation of the relationship between citizens,state, and the economy, were not popular with public opinion,which remained attached to progressive taxation and a comprehensivesocial welfare system. The party leadership ignored these warnings.Rather than attempting to align their policies with voter aspirations,their principal use of political communications techniques aimedat improving their leader's image. The person in charge of thiswork was a stranger to politics whose understanding of the waycultural or political attitudes are changed led him to interpretvery fatalistically the chances of influencing election outcomesby communications techniques. His methods were treated withfrank skepticism by party communications colleagues, his client'spersonality was particularly unamenable to his efforts, andhis one successful initiative—the rejuvenation of theexecutive committee—was operated at the cost of a rowin the party. In the case of the RPR, opinion research seemsto have played no role at all in an important party policy review,the causes of which should be sought elsewhere.  相似文献   
8.
9.
10.
香港大学图书馆领导研修班是为现任和未来图书馆领导而设的密集式培训班,预计参加者主要为现任或未来的馆长或助理馆长.研修班将采用英语作为主要讲授语言另辅以部分中文翻译,采取让学员透过一系列主题讲学、个案研究、小组活动及互动讨论的方式向其它馆员和资讯业专家学习.  相似文献   
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