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   3173篇
  免费   39篇
  国内免费   1篇
教育   2192篇
科学研究   385篇
各国文化   35篇
体育   258篇
综合类   1篇
文化理论   28篇
信息传播   314篇
  2021年   40篇
  2020年   58篇
  2019年   107篇
  2018年   170篇
  2017年   132篇
  2016年   130篇
  2015年   68篇
  2014年   91篇
  2013年   635篇
  2012年   56篇
  2011年   66篇
  2010年   62篇
  2009年   51篇
  2008年   72篇
  2007年   59篇
  2006年   53篇
  2005年   44篇
  2004年   43篇
  2003年   32篇
  2002年   35篇
  2001年   36篇
  2000年   28篇
  1999年   32篇
  1998年   34篇
  1997年   27篇
  1996年   30篇
  1995年   21篇
  1994年   27篇
  1993年   30篇
  1992年   35篇
  1991年   34篇
  1990年   34篇
  1989年   35篇
  1988年   36篇
  1987年   34篇
  1986年   33篇
  1985年   32篇
  1984年   37篇
  1983年   24篇
  1982年   33篇
  1981年   22篇
  1980年   25篇
  1979年   23篇
  1978年   20篇
  1977年   20篇
  1976年   21篇
  1941年   20篇
  1939年   23篇
  1937年   41篇
  1936年   40篇
排序方式: 共有3213条查询结果,搜索用时 0 毫秒
11.
12.
This paper characterizes the methodological foundations of national standardization in the Russian Federation, in particular in the library and information field. The activities of Technical Standardization Committee 191 Scientific and Technical Information, Librarianship, and Publishing are reported.  相似文献   
13.
Inconsistency is often considered an indication of deceit. The conceptualization of consistency used in deception research, however, has not made a clear distinction between two concepts long differentiated by philosophers: coherence and correspondence. The existing literature suggests that coherence is not generally useful for deception detection. Correspondence, however, appears to be quite useful. The present research developed a model of how correspondence is utilized to make judgments, and this article reports on four studies designed to elaborate on the model. The results suggest that judges attend strongly to correspondence and that they do so in an additive fashion. As noncorrespondent information accumulates, an increasingly smaller proportion of judges make truthful assessments of guilty suspects. This work provides a basic framework for examining how information is utilized to make deception judgments and forms the correspondence and coherence module of truth-default theory.  相似文献   
14.
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   
15.
The classical criteria for controllability and observability are given a tensorial formulation which is then extended into Boolean form directly related to a digraph interpretation of system structure. This is examined in detail with particular reference to group theoretic aspects, invariant properties under transformation, the term rank test and the existence of zero eigenvalues.Within this framework the structural design concepts of potential controllability and observability are presented in generalised terms.  相似文献   
16.
Necessary and sufficient conditions are obtained for the realization of an m-variable positive real function (PRF) as the impedence function of a resistively-terminated ladder network of m lossless two-ports connected in cascade. Each two-port is a single-variable lossless ladder with all of its transmission zeros either at the origin or at finity. Conditions are also obtained when each of the two-ports is a Fujisawa-type lowpass ladder.  相似文献   
17.
18.
19.
20.
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