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   13439篇
  免费   161篇
  国内免费   18篇
教育   9229篇
科学研究   1389篇
各国文化   152篇
体育   1342篇
综合类   8篇
文化理论   149篇
信息传播   1349篇
  2021年   114篇
  2020年   195篇
  2019年   294篇
  2018年   374篇
  2017年   384篇
  2016年   329篇
  2015年   225篇
  2014年   338篇
  2013年   2610篇
  2012年   296篇
  2011年   302篇
  2010年   252篇
  2009年   242篇
  2008年   261篇
  2007年   280篇
  2006年   258篇
  2005年   236篇
  2004年   221篇
  2003年   246篇
  2002年   206篇
  2001年   210篇
  2000年   216篇
  1999年   211篇
  1998年   129篇
  1997年   125篇
  1996年   149篇
  1995年   114篇
  1994年   136篇
  1993年   133篇
  1992年   188篇
  1991年   189篇
  1990年   182篇
  1989年   176篇
  1988年   160篇
  1987年   161篇
  1986年   178篇
  1985年   177篇
  1984年   146篇
  1983年   178篇
  1982年   149篇
  1981年   133篇
  1980年   138篇
  1979年   215篇
  1978年   150篇
  1977年   139篇
  1976年   143篇
  1975年   96篇
  1974年   121篇
  1973年   86篇
  1971年   89篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
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   
43.
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   
44.
45.
46.
47.
48.
At this critical point in its development as a burgeoning market economy ensconced within a socialist political system, China faces a dilemma in becoming a fully‐fledged player in the copyright arena. Over the past two decades, China has made great strides in creating a legal and governmental framework for the administration and enforcement of copyright. But its implementation has left much to be desired, owing partly to inadequate resources of money and personnel, partly to insufficiently harsh penalties for infringement, partly to cumbersome procedures required to bring action against infringers, and partly to a general cultural tolerance for practices that run contrary to cultivating a broad‐based respect for copyright. This article proposes that a balance of pressure and encouragement is likely to have the best chances of success in overcoming these problems and ensuring that China will become fully welcomed into the international publishing community.  相似文献   
49.
50.
The necessity for publishing a separate abstract journal on spintronics, which is a new, rapidly developing branch of physics, is substantiated. The interest in spintronics, which is the study of fundamental processes involving the simultaneous transport of both electron charge and electron spins in solids, as well as the interaction of electrons with a magnetic grating, is determined not only by its fascinating prospects but also the results that have already achieved. The spin and charge “degrees of freedom” open possibilities for the creation of semiconducting devices with parameters that are much superior to the existing ones and also the construction of devices that do not have analogues at present. First of all, this will permit problems of information transmission and processing to be solved in a new way. A detailed rubrication on spintronics is given in order to discuss the possibility of publishing a separate edition of an abstract journal devoted to spintronics.  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