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   24785篇
  免费   369篇
  国内免费   15篇
教育   17602篇
科学研究   2020篇
各国文化   280篇
体育   2435篇
综合类   7篇
文化理论   239篇
信息传播   2586篇
  2021年   250篇
  2020年   388篇
  2019年   609篇
  2018年   793篇
  2017年   743篇
  2016年   728篇
  2015年   445篇
  2014年   601篇
  2013年   4748篇
  2012年   530篇
  2011年   581篇
  2010年   447篇
  2009年   479篇
  2008年   528篇
  2007年   488篇
  2006年   456篇
  2005年   400篇
  2004年   422篇
  2003年   341篇
  2002年   364篇
  2001年   491篇
  2000年   555篇
  1999年   470篇
  1998年   278篇
  1997年   237篇
  1996年   286篇
  1995年   245篇
  1994年   255篇
  1993年   225篇
  1992年   362篇
  1991年   366篇
  1990年   342篇
  1989年   359篇
  1988年   325篇
  1987年   325篇
  1986年   320篇
  1985年   359篇
  1984年   285篇
  1983年   278篇
  1982年   227篇
  1981年   236篇
  1980年   237篇
  1979年   345篇
  1978年   247篇
  1977年   221篇
  1976年   197篇
  1975年   171篇
  1974年   173篇
  1973年   169篇
  1971年   151篇
排序方式: 共有10000条查询结果,搜索用时 796 毫秒
91.
How will the expansion of the concept of construct validity affect validation practice in employment testing? How does the need for consequential validity differ in educational and employment testing? How do the research bases differ for performance assessment in these settings? Are there parallel trends in policies for test use in education and industry?  相似文献   
92.
93.
94.
This paper examines end-user, online searching using data from a questionnaire mailed to 150 Canadian health professionals in practice settings. The response rate was 83% (n = 124). The data provide a demographic profile of early adopters of end-user searching in the health care community. Positive correlations with the user's level of implementation of end-user searching were found for the following variables: amount of time spent in research activities, amount of system training received, and use of Medical Subject Headings (MeSH). There was a negative association between the amount of time spent in patient care and implementation level. General practitioners and family physicians had lower implementation levels than physicians in other specialties. Successful implementers were more likely to be computer literate and to place a high value on formal information sources such as books, journals, and libraries. Health professionals using so-called "user-friendly" or menu-based software had lower levels of personal commitment to using online databases, as measured by a combination of continuance of use, willingness to pay personally, type of recommendations made to colleagues, and hardware ownership.  相似文献   
95.
96.
97.
Computers are integral to medical practice, education, and research. While medical students learn computer skills during their training, many practicing physicians do not have the same computer experience. To familiarize this group with the exciting developments in medical informatics, the Himmelfarb Health Sciences Library and Department of Computer Medicine at the George Washington University Medical Center organized a workshop "Introducing Your Office Computer!" for attending physicians. The workshop featured a short lecture/video presentation on computer applications in medicine followed by a "computer fair" of five computer applications. Eleven physicians attended the workshop. Feedback was very positive; many called later to request more detailed instructions on using the programs demonstrated. It was a valuable experience for the staff, and new bridges were built between departments and clients.  相似文献   
98.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service.  相似文献   
99.
100.
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