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   1685篇
  免费   32篇
  国内免费   3篇
教育   1358篇
科学研究   45篇
各国文化   26篇
体育   67篇
文化理论   14篇
信息传播   210篇
  2023年   7篇
  2022年   4篇
  2021年   16篇
  2020年   28篇
  2019年   55篇
  2018年   80篇
  2017年   74篇
  2016年   62篇
  2015年   45篇
  2014年   61篇
  2013年   390篇
  2012年   48篇
  2011年   49篇
  2010年   41篇
  2009年   43篇
  2008年   47篇
  2007年   57篇
  2006年   52篇
  2005年   39篇
  2004年   22篇
  2003年   24篇
  2002年   38篇
  2001年   24篇
  2000年   28篇
  1999年   29篇
  1998年   24篇
  1997年   25篇
  1996年   21篇
  1995年   17篇
  1994年   23篇
  1993年   31篇
  1992年   18篇
  1991年   17篇
  1990年   19篇
  1989年   16篇
  1988年   4篇
  1987年   11篇
  1986年   19篇
  1985年   12篇
  1984年   9篇
  1983年   10篇
  1982年   8篇
  1981年   6篇
  1980年   7篇
  1979年   8篇
  1978年   11篇
  1977年   8篇
  1975年   5篇
  1974年   7篇
  1912年   3篇
排序方式: 共有1720条查询结果,搜索用时 31 毫秒
1.
2.
Thepractice of evidence-based health care requires that information on methodology be identifiedfrom databases such as MEDLINE. Up until this year there have been no designated medicalsubject headings (MeSH) for evidence-based health care. ‘EVIDENCE-BASEDMEDICINE’ appears as a MeSH term from 1997. The absence of designated MeSH forthis concept prior to 1997 provides a challenge to the searcher. This paper describes the creationof a MEDLINE search strategy to retrieve articles on the methods of evidence-based health carepublished prior to the introduction of the new term, where an optimal combination of free-textand MeSH terms is required to identify relevant material. The study examines both free-text andsubject heading searching and attempts an optimal balance of sensitivity and specificity. It beginsby examining separate free-text and subject heading searches. Sensitivity of the subject headingsearch was 33% and specificity 80%, while the free-text search produced asensitivity of 50% and a specificity of 67%. The final strategy, combining bothapproaches, was more successful with sensitivity reaching between 82 and 90% andspecificity 83%. It is therefore possible to devise a search strategy to retrieve articles on themethods of evidence-based health care with relatively successful rates of sensitivity andspecificity. The limitations of MEDLINE, however, necessitate the use of additional approachesin identifying articles on the methods of evidence-based health care.  相似文献   
3.
4.
5.
Policies for responding to allegations of fraud in research   总被引:1,自引:0,他引:1  
Greene PJ  Durch JS  Horwitz W  Hooper VS 《Minerva》1985,23(2):203-215
  相似文献   
6.
7.
8.
9.
Last year 1279 professional authors completed a lengthy questionnaire on their use of, and attitudes towards, technological tools for writing and publishing. The data were analysed quantitatively, by examining the most frequent responses to items on the questionnaire, and qualitatively, by looking closely at details illuminating the relationship between authors and publishers. The results, for present purposes, are divided into three broad bands of interest: first, what types of writing software authors are currently using; second, what the implications of using authors' disks in the publication chain are; and third, how technology alters perceptions of the copy as a unit of sale. Findings suggest that though authors are operating at basic levels, they have embraced technology with more enthusiasm than their publishers. The challenge facing those involved in books is to make provision for presenting and displaying work in electronic form: to improve contracts and licensing agreements, and to disseminate information on technology to authors.Funded by the British National Bibliography Reseach Fund.© Jane Dorner, 1991  相似文献   
10.
ABSTRACT

This paper examines how conservators engage with uncertainty when creating preventive conservation strategies. It argues that by recognising contexts in which uncertainty will be encountered conservators can develop effective management strategies. A typology of uncertainty explores a range of categories of uncertainty, their experience in preventive conservation and identifies distinct approaches to manage them. Managing uncertainty may include acts of defining its parameters, exposing and resolving through communication or protecting from with contingency. Whatever approach is adopted it must be accepted that uncertainty cannot be avoided. It is important therefore to aim to live well with uncertainty and the paper advocates for preventive conservation applications of strategies recommended in health care for patients with life-threatening illnesses. These strategies include working on things that can be controlled, goal setting, acceptance and factoring in emotions. The ability to identify contexts in which uncertainty is inbuilt should trigger those concerned with preventive conservation to activate strategies developed for managing and living well with uncertainty.  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