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   21389篇
  免费   254篇
  国内免费   15篇
教育   14696篇
科学研究   2419篇
各国文化   464篇
体育   1607篇
综合类   11篇
文化理论   163篇
信息传播   2298篇
  2020年   228篇
  2019年   334篇
  2018年   413篇
  2017年   494篇
  2016年   419篇
  2015年   297篇
  2014年   457篇
  2013年   4356篇
  2012年   430篇
  2011年   433篇
  2010年   382篇
  2009年   411篇
  2008年   455篇
  2007年   429篇
  2006年   395篇
  2005年   322篇
  2004年   317篇
  2003年   246篇
  2002年   232篇
  2001年   276篇
  2000年   337篇
  1999年   299篇
  1998年   187篇
  1997年   183篇
  1996年   209篇
  1995年   235篇
  1994年   211篇
  1993年   235篇
  1992年   331篇
  1991年   344篇
  1990年   326篇
  1989年   310篇
  1988年   256篇
  1987年   258篇
  1986年   264篇
  1985年   315篇
  1984年   284篇
  1983年   267篇
  1982年   234篇
  1981年   214篇
  1980年   214篇
  1979年   334篇
  1978年   268篇
  1977年   235篇
  1976年   203篇
  1975年   194篇
  1974年   186篇
  1973年   183篇
  1972年   153篇
  1971年   151篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
62.
63.
64.
65.
66.
67.
This Basic Journal List of forty-eight journal titles is intended as a selection guide for the librarian of the small hospital. It is based on a survey of physicians in Virginia who were asked to review journal titles contained in the 1967 edition of a list compiled by Mr. Alfred N. Brandon. The List is designed for the library in a hospital of from 100 to 300 beds and for the active clinician.  相似文献   
68.
The preliminary building program suggested in this paper makes use of outlines, graphs, charts, and lists, rather than long-winded paragraphs, to describe the needs, objectives, and philosophy of the library. It is hoped that a short, concise, but detailed, report using these methods will save time and make the report more attractive to read, thereby encouraging the many people who will need to assist in the building planning to use the report.  相似文献   
69.
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   
70.
EPIC is a service that provides keyword or subject access to the OCLC Online Union Catalog (OLUC). This capability increases the success rate for title location as well as the potential uses of the OLUC. The features of the EPIC system, application of these features to the OLUC, and specific uses in health sciences libraries are described in this article.  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