首页 | 官方网站   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   9618篇
  免费   84篇
  国内免费   7篇
文化教育   9709篇
  2021年   59篇
  2020年   99篇
  2019年   176篇
  2018年   245篇
  2017年   284篇
  2016年   262篇
  2015年   188篇
  2014年   242篇
  2013年   2221篇
  2012年   199篇
  2011年   213篇
  2010年   200篇
  2009年   187篇
  2008年   227篇
  2007年   221篇
  2006年   206篇
  2005年   205篇
  2004年   185篇
  2003年   165篇
  2002年   158篇
  2001年   142篇
  2000年   140篇
  1999年   149篇
  1998年   125篇
  1997年   126篇
  1996年   127篇
  1995年   154篇
  1994年   130篇
  1993年   114篇
  1992年   121篇
  1991年   116篇
  1990年   114篇
  1989年   115篇
  1988年   104篇
  1987年   104篇
  1986年   96篇
  1985年   103篇
  1984年   112篇
  1983年   104篇
  1982年   114篇
  1981年   89篇
  1980年   68篇
  1979年   79篇
  1978年   81篇
  1977年   89篇
  1976年   74篇
  1975年   58篇
  1974年   62篇
  1973年   63篇
  1971年   48篇
排序方式: 共有9709条查询结果,搜索用时 15 毫秒
31.
This paper addresses several misunderstandings about the nature of the FBI's Central Records System. Although depicted in popular culture and much of FBI historiography as a tool for the Cold War suppression of American radicals, the FBI's records system grew out of Department of Justice systems already in place before J. Edgar Hoover became Director in 1924. The system grew in size and complexity according to the demands placed on it by the changing priorities of the FBI's criminal and intelligence missions, guided by a “progressive” drive for efficiency through centralization.  相似文献   
32.
33.
34.
当您每年要向中国数千个地方发送1600万个包裹时,很多问题都可能出现。只要有百分之一的包裹被标示错误,就会有16万个包裹迷失目的地,势必引来大群客户的抱怨。  相似文献   
35.
In 2008 Meier and Conkling first tested Google Scholar's coverage of the engineering literature against citations gathered from the Compendex database. Since that time, other studies have used the same methodology and found improvement in Google Scholar's coverage. This study uses engineering dissertations from Proquest Dissertations & Theses to create a data set of citations for the comparison of fee-based databases, Compendex and Scopus, against Google Scholar. From 1950 to 2017 Google Scholar outperformed both Compendex and Scopus in discoverability of citations in nine engineering subjects. These results have implications for collection management and information literacy program planning for librarians.  相似文献   
36.
ABSTRACT

The career path and significant professional accomplishments of librarian Valerie Bross (1954–2016) are described in this article. The awards and recognition she received are recounted and the influence of outside activities on her career is assessed. An attempt is made to capture what she was like as a professional, as well as what her unique characteristics were. A bibliography of her writings and a photograph are included.  相似文献   
37.
In hospitals and clinics, anyone who “touches” a patient has a license authorizing them to do so—from the phlebotomist to the cardiologist, from the genetic counselor to the social worker, and so on, except for the clinical medical librarian. This column discusses the intent versus the realities of occupational licensure for clinical medical librarians and provides recommendations for next steps.  相似文献   
38.
This article describes the ongoing efforts at University of Nevada, Las Vegas (UNLV) Libraries to evolve the role of the institutional repository (IR) and to effectively position it within the context of the Libraries’ collections, research support, and scholarly communication services. A major component of this process is re-examining the fundamental aims of the IR and aligning it to the Libraries and the campus strategic goals. The authors situate UNLV Libraries’ experience within the context of the current literature to provide background and reasoning for our decision to pursue two, at times conflicting, aims for the IR: one for scholarly communication and another for research administration.  相似文献   
39.
This article explores the existence of a “citizen-centered journalism” that sees citizens as crucial participants in the construction of news and as co-creators of their own worlds. Through qualitative case studies of three news organizations, the article examines the motivation for using a citizen-centered approach, the news routines that are required to do so, the categories of content produced, and the perceived impact of this approach. The results suggest these news organizations are working in partnership with communities and striving to give a voice to historically marginalized communities. The journalists, however, see citizen participation as complementary to professional journalistic routines that favor verifiable information, rather than assigning inherent value to it for its own sake.  相似文献   
40.
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-23

京公网安备 11010802026262号