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   3758篇
  免费   175篇
各国政治   225篇
工人农民   116篇
世界政治   358篇
外交国际关系   267篇
法律   1569篇
中国共产党   2篇
中国政治   38篇
政治理论   1313篇
综合类   45篇
  2021年   30篇
  2020年   45篇
  2019年   72篇
  2018年   114篇
  2017年   125篇
  2016年   118篇
  2015年   77篇
  2014年   104篇
  2013年   616篇
  2012年   79篇
  2011年   113篇
  2010年   101篇
  2009年   113篇
  2008年   107篇
  2007年   101篇
  2006年   113篇
  2005年   122篇
  2004年   108篇
  2003年   99篇
  2002年   125篇
  2001年   79篇
  2000年   79篇
  1999年   71篇
  1998年   61篇
  1997年   63篇
  1996年   40篇
  1995年   51篇
  1994年   61篇
  1993年   53篇
  1992年   46篇
  1991年   61篇
  1990年   37篇
  1989年   54篇
  1988年   34篇
  1987年   41篇
  1986年   41篇
  1985年   44篇
  1984年   37篇
  1983年   48篇
  1982年   44篇
  1981年   51篇
  1980年   37篇
  1979年   40篇
  1978年   36篇
  1977年   21篇
  1976年   35篇
  1975年   19篇
  1974年   21篇
  1973年   21篇
  1969年   18篇
排序方式: 共有3933条查询结果,搜索用时 15 毫秒
71.
72.

This paper explores the parliamentary activity of six Canadian prime ministers from St Laurent to Mulroney. Employing Hansard, each parliamentary utterance by a prime minister from 1949 to 1993 has been coded into one of four categories: answers to questions, speeches delivered, statements made and other interventions. Voting records have also been coded. Employing this database, the analysis compares and contrasts the prime ministers in terms of their political personalities and explores the overall scope and character of prime‐ministerial activism in the House throughout the past 40 years. Canadian profiles are compared with already existing British data in order to test generalisations concerning the diminishing presence of prime ministers in parliaments in Canada and Britain.  相似文献   
73.
74.
75.
A review of Aleksandr Solzhenitsyn's March 1917, translated by Marian Schwartz  相似文献   
76.
77.
The current study correlates Merton's anomie theory and W. E. B. Dubois's double-consciousness theory to measure black law enforcement officers' reactions to occupational strain resulting from officers' ethnic-identification. Measuring levels of anomic behavior provides a scale for identifying levels of risk affecting the well-being of individual officers and organizations. Testing hierarchal regression models with a national sample of black state- and federal-level law enforcement officers (n = 84) reveals a presence of double consciousness as a significant predictor for levels of anomic behavior in law enforcement occupational cultures. It also further suggests that race remains a significant factor in law enforcement organizations and cultures, whereas many police executives would prefer to believe that race issues in policing are settled.  相似文献   
78.
79.
80.
The forensic science community raised the need for improved evidence recognition, collection, and visualization analytical instrumentation for field and laboratory use. While the 3D optical techniques for imaging static objects have been extensively studied, there is still a major gap between current knowledge and collecting high‐quality footwear and tire impression evidence. Among optical means for 3D imaging, digital fringe projection (DFP) techniques reconstruct 3D shape from phase information, achieving camera‐pixel spatial resolution. This paper presents a high‐resolution 3D imaging technology using DFP techniques dedicated to footwear and tire impression capture. We developed fully automated software algorithms and a graphical user interface (GUI) that allow anyone without training to operate for high‐quality 3D data capture. We performed accuracy evaluations and comparisons comparing with the commercial high‐end 3D scanner and carried out qualitative tests for various impressions comparing with the current practices. Overall, our technology achieves similar levels of accuracy and resolution with a high‐end commercially available 3D scanner, while having the merits of being (1) more affordable; (2) much easier to operate; and (3) more robust. Compared with the current practice of casting, our technology demonstrates its superiority because it (1) is non‐destructive; (2) collects more evidence detail than casts, especially when an impression is fragile; (3) requires less time and money to collect each piece of evidence; and (4) results in a digital file that can easily be shared with other examiners.  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