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   25155篇
  免费   346篇
  国内免费   14篇
教育   18126篇
科学研究   1937篇
各国文化   261篇
体育   2504篇
综合类   9篇
文化理论   215篇
信息传播   2463篇
  2021年   241篇
  2020年   362篇
  2019年   546篇
  2018年   742篇
  2017年   684篇
  2016年   669篇
  2015年   423篇
  2014年   592篇
  2013年   4665篇
  2012年   551篇
  2011年   602篇
  2010年   472篇
  2009年   516篇
  2008年   510篇
  2007年   478篇
  2006年   463篇
  2005年   375篇
  2004年   398篇
  2003年   311篇
  2002年   332篇
  2001年   462篇
  2000年   520篇
  1999年   446篇
  1998年   270篇
  1997年   261篇
  1996年   344篇
  1995年   318篇
  1994年   301篇
  1993年   261篇
  1992年   408篇
  1991年   416篇
  1990年   373篇
  1989年   380篇
  1988年   346篇
  1987年   331篇
  1986年   329篇
  1985年   373篇
  1984年   301篇
  1983年   308篇
  1982年   248篇
  1981年   253篇
  1980年   278篇
  1979年   398篇
  1978年   293篇
  1977年   279篇
  1976年   220篇
  1975年   197篇
  1974年   201篇
  1973年   182篇
  1971年   178篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
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   
73.
74.
75.
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   
76.
77.
78.
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   
79.
The successful delivery of health care involves a commitment to improved communication both with regard to health professionals and the public. The need for innovative educational patterns is implicit in the recommendations of the latest Carnegie Commission Report, Higher Education and the Nation's Health.The new technology of videorecording permits the learner to learn at a time and place of his own choosing. Information is transmitted through the cathode ray tube-a television set-the medium of our time. The videorecord is of significant value in the basic and clinical sciences, in training personnel for allied health professions, and in continuing education. It is thoroughly compatible with the new concept of the open university, an institution without walls.In addition to its unquestioned value in educational programs in the health sciences, the videorecord has major implications for the curriculum in librarianship and for increasing the professional competence of medical librarians and their ancillaries. The medical librarian has a major stake in its imaginative use for overcoming some of the barriers to individual and community health.  相似文献   
80.
Science Citation Index is one of a number of indexes based on the assumption that the papers cited by one author refer to work which is relevant to the subject discussed by the author citing them. Cleverdon, however, has questioned that assumption, and it was to test the assumption that this research was undertaken. An attempt was made to determine what percent of articles cited were related to the citing article. The conclusion reached was that in the field of medicine approximately 72 percent of the cited papers were considered related to the original paper by the authors of the original, thus apparently bearing out the assumption for citation indexing.  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