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   42831篇
  免费   669篇
  国内免费   28篇
教育   30552篇
科学研究   3672篇
各国文化   459篇
体育   3678篇
综合类   18篇
文化理论   364篇
信息传播   4785篇
  2021年   446篇
  2020年   685篇
  2019年   1052篇
  2018年   1417篇
  2017年   1374篇
  2016年   1242篇
  2015年   750篇
  2014年   1097篇
  2013年   8207篇
  2012年   1012篇
  2011年   1079篇
  2010年   810篇
  2009年   858篇
  2008年   942篇
  2007年   865篇
  2006年   783篇
  2005年   703篇
  2004年   708篇
  2003年   609篇
  2002年   625篇
  2001年   813篇
  2000年   805篇
  1999年   703篇
  1998年   433篇
  1997年   428篇
  1996年   503篇
  1995年   450篇
  1994年   404篇
  1993年   396篇
  1992年   585篇
  1991年   593篇
  1990年   578篇
  1989年   603篇
  1988年   540篇
  1987年   561篇
  1986年   536篇
  1985年   612篇
  1984年   493篇
  1983年   476篇
  1982年   403篇
  1981年   379篇
  1980年   387篇
  1979年   556篇
  1978年   409篇
  1977年   375篇
  1976年   328篇
  1975年   292篇
  1974年   307篇
  1973年   283篇
  1971年   295篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
122.
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   
123.
124.
125.
126.
"Change" is a critical dimension of contemporary experience. Library associations are not exempt, and they change in ways similar to other organizations. According to some authorities, four phases typify the process: diagnosis, design, implementation, and incorporation. Focusing on changes in the Medical Library Association's longstanding program of continuing education, the authors utilize the "phase framework" to chart that association's movement from a management system depending primarily upon volunteers to one in which professional staff figure prominently. The historical review serves a heuristic purpose for individuals and institutions in identifying characteristic features of the change process.  相似文献   
127.
128.
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   
129.
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   
130.
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