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   4521篇
  免费   51篇
  国内免费   6篇
教育   3000篇
科学研究   518篇
各国文化   21篇
体育   368篇
综合类   9篇
文化理论   58篇
信息传播   604篇
  2023年   26篇
  2022年   34篇
  2021年   42篇
  2020年   78篇
  2019年   109篇
  2018年   203篇
  2017年   228篇
  2016年   204篇
  2015年   126篇
  2014年   167篇
  2013年   744篇
  2012年   143篇
  2011年   165篇
  2010年   157篇
  2009年   110篇
  2008年   100篇
  2007年   131篇
  2006年   81篇
  2005年   89篇
  2004年   82篇
  2003年   72篇
  2002年   57篇
  2001年   100篇
  2000年   88篇
  1999年   73篇
  1998年   57篇
  1997年   46篇
  1996年   55篇
  1995年   29篇
  1994年   36篇
  1993年   24篇
  1992年   48篇
  1991年   51篇
  1990年   31篇
  1989年   41篇
  1988年   36篇
  1987年   35篇
  1986年   36篇
  1985年   42篇
  1984年   38篇
  1983年   24篇
  1982年   35篇
  1981年   27篇
  1979年   37篇
  1978年   31篇
  1977年   23篇
  1975年   18篇
  1974年   24篇
  1972年   27篇
  1971年   19篇
排序方式: 共有4578条查询结果,搜索用时 46 毫秒
11.
12.
13.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service.  相似文献   
14.
Questions concerning some of the values we hold as librarians and the goals, standards, and other evaluation tools we derive from them are discussed in the context of the history of our profession and the present period of rapid change. The concepts of stable and changing paradigms and of "scientific communities" provide the foundation for consideration of how a changing conceptual framework can affect values and their application in the evaluation process. One of many possible scenarios for the future is briefly outlined to demonstrate how some traditional values may fare.  相似文献   
15.
16.
17.
This paper discusses the evaluation of scientific activity with the help of some scientometric indices, in particular, a citation index. The information massif of the bibliographic database of citations to domestic publications of Kazakh authors is statistically described.  相似文献   
18.
19.
We consider some issues of the development of the national information infrastructure in the field of innovation, including a national system of accounting for the results of scientific and technical activities (RSTA) and a national new-generation research computer network (NNGRCN). The current state of the national system of scientific and technical information and its resources for information support of innovation processes are analyzed. In the context of further development of the Commonwealth of Independent States (CIS), we propose a Conception of scientific and technical support for programs and projects of NIS member-states in the field of innovation, making it possible to incorporate the existing innovation-oriented information resources into a joint distributed integrated information system as well as to create new information resources and technologies.  相似文献   
20.
The existing practice of measurements in the system of the accounting for library stocks is considered from the standpoint of econometrics. Terminological aspects are touched upon.  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