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   30474篇
  免费   477篇
  国内免费   48篇
教育   21660篇
科学研究   2863篇
各国文化   290篇
体育   2525篇
综合类   39篇
文化理论   276篇
信息传播   3346篇
  2021年   286篇
  2020年   462篇
  2019年   638篇
  2018年   902篇
  2017年   990篇
  2016年   889篇
  2015年   559篇
  2014年   752篇
  2013年   5757篇
  2012年   728篇
  2011年   801篇
  2010年   623篇
  2009年   585篇
  2008年   665篇
  2007年   660篇
  2006年   584篇
  2005年   515篇
  2004年   483篇
  2003年   475篇
  2002年   502篇
  2001年   541篇
  2000年   530篇
  1999年   533篇
  1998年   276篇
  1997年   298篇
  1996年   351篇
  1995年   285篇
  1994年   302篇
  1993年   270篇
  1992年   430篇
  1991年   420篇
  1990年   444篇
  1989年   421篇
  1988年   389篇
  1987年   349篇
  1986年   372篇
  1985年   433篇
  1984年   355篇
  1983年   368篇
  1982年   298篇
  1981年   295篇
  1980年   259篇
  1979年   387篇
  1978年   306篇
  1977年   284篇
  1976年   246篇
  1975年   201篇
  1974年   195篇
  1973年   193篇
  1972年   177篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
"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   
83.
84.
85.
86.
Since a sizeable hospital must have a library, it must have a library committee. Like all hospital committees, this one is to help maintain standards of medical care and to mediate between staff and administration. Unlike others, it clusters around one elected member (the chairman) and one employee (the librarian). A dynamic librarian can, and should, influence and inspire the committee's deliberations; and must be able to depend upon the support of the physician members of the committee.  相似文献   
87.
Cancelled charge slips collected over a one-year period supply the data for this analysis of circulation in the Yale Medical Library. Full-time teaching faculty are the heaviest users of journal literature, and students, of monograph literature. Faculties of Medical School departments are compared in terms of their use of material in individual subjects. Subject literatures are analyzed in terms of groups of users borrowing from them. The extent to which journal titles used by medical students are also used by Medical School faculty is examined. One of the products of the study is a rank list of journal titles used in the Library. Results are presented in several tables.  相似文献   
88.
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   
89.
The American Hospital Association (AHA) Resource Center indexes journals for the Health Planning and Administration (HEALTH) database and Hospital Literature Index (HLI). These journals, designated special list health journals, are selected to provide access to a wide and balanced coverage of hospital and health care administration and health policy literature. This article provides background information on HEALTH and HLI and describes special list health journals in detail (including historical information, information sources, and broad subject divisions). It also discusses AHA policies relating to journal and article selection and current subject distribution of special list health journals.  相似文献   
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