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   22776篇
  免费   330篇
  国内免费   14篇
教育   16104篇
科学研究   1910篇
各国文化   250篇
体育   2290篇
综合类   7篇
文化理论   212篇
信息传播   2347篇
  2021年   232篇
  2020年   360篇
  2019年   540篇
  2018年   729篇
  2017年   666篇
  2016年   663篇
  2015年   403篇
  2014年   532篇
  2013年   4234篇
  2012年   484篇
  2011年   536篇
  2010年   403篇
  2009年   434篇
  2008年   474篇
  2007年   440篇
  2006年   414篇
  2005年   360篇
  2004年   390篇
  2003年   307篇
  2002年   325篇
  2001年   458篇
  2000年   509篇
  1999年   434篇
  1998年   255篇
  1997年   222篇
  1996年   268篇
  1995年   225篇
  1994年   241篇
  1993年   199篇
  1992年   330篇
  1991年   347篇
  1990年   318篇
  1989年   343篇
  1988年   307篇
  1987年   308篇
  1986年   306篇
  1985年   338篇
  1984年   274篇
  1983年   272篇
  1982年   217篇
  1981年   220篇
  1980年   228篇
  1979年   328篇
  1978年   232篇
  1977年   211篇
  1976年   185篇
  1975年   164篇
  1974年   167篇
  1973年   164篇
  1971年   150篇
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
81.
82.
83.
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   
84.
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   
85.
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   
86.
The immediate circumstances of the new Broadcasting Act are discussed. The impact of this legislation on schools broadcasting is then considered in relation to the history of earlier legislation in the UK, and the early responses to the Television Act of 1954. The importance of the personnel involved in television production and their commitment to the values of public service is stressed, and placed against the gloomier forebodings of the pessimists of the past‐‐and of today. The article concludes with the assertion that it is the people in the television industry itself, and the values they hold, that will ensure the continued survival of good schools television.  相似文献   
87.
Time series analysis was used to investigate the hypothesis that during acquisition of a motor skill, knowledge of results (KR) information is used to generate a stable internal referent about which response errors are randomly distributed. Sixteen subjects completed 50 acquisition trials of each of three movements whose spatial-temporal characteristics differed. Acquisition trials were either blocked, with each movement being presented in series, or randomized, with the presentation of movements occurring in random order. Analysis of movement time data indicated the contextual interference effect reported in previous studies was replicated in the present experiment. Time series analysis of the acquisition trial data revealed the majority of individual subject response patterns during blocked trials were best described by a model with a temporarily stationary, internal reference of the criterion and systematic, trial-to-trial variation of response errors. During random trial conditions, response patterns were usually best described by a "White-noise" model. This model predicts a permanently stationary, internal reference associated with randomly distributed response errors that are unaffected by KR information. These results are not consistent with previous work using time series analysis to describe motor behavior (Spray & Newell, 1986).  相似文献   
88.
89.
90.
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