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   1055篇
  免费   67篇
各国政治   59篇
工人农民   60篇
世界政治   88篇
外交国际关系   69篇
法律   520篇
中国政治   7篇
政治理论   313篇
综合类   6篇
  2023年   5篇
  2022年   4篇
  2021年   11篇
  2020年   16篇
  2019年   27篇
  2018年   43篇
  2017年   48篇
  2016年   46篇
  2015年   37篇
  2014年   38篇
  2013年   173篇
  2012年   37篇
  2011年   40篇
  2010年   33篇
  2009年   38篇
  2008年   42篇
  2007年   44篇
  2006年   48篇
  2005年   33篇
  2004年   26篇
  2003年   39篇
  2002年   26篇
  2001年   17篇
  2000年   22篇
  1999年   15篇
  1998年   12篇
  1997年   13篇
  1996年   11篇
  1995年   4篇
  1994年   9篇
  1993年   6篇
  1992年   11篇
  1991年   13篇
  1990年   15篇
  1989年   11篇
  1988年   7篇
  1987年   4篇
  1986年   10篇
  1985年   16篇
  1984年   7篇
  1983年   9篇
  1982年   11篇
  1981年   6篇
  1980年   8篇
  1979年   6篇
  1977年   3篇
  1974年   4篇
  1973年   3篇
  1969年   2篇
  1965年   3篇
排序方式: 共有1122条查询结果,搜索用时 62 毫秒
251.
252.
While considering the recent 'I would give up’ call from the Centre for Crime and Justice Studies, I was inspired by the contributions of others to pull together my thoughts on an issue which increasingly challenges researchers and providers in criminal justice – chasing the rainbow of reductions in ‘reoffending’. The significance of this measure is currently being reinforced through its status as the pot of gold in criminal justice payment by results’(PbR) contracting.  相似文献   
253.
In recent years, the growth in knowledge of the characteristics and activities of gang members has been impressive. Little is known, however, about the key features of younger gang members, those in middle school. Ninety-six middle school students who self-reported current or former gang membership in a school-based survey form the sample for this analysis. This study examined four dimensions of gang membership: joining the gang, processes involved in gang life, organizational characteristics of the gang, and family characteristics. Gang membership appears to be transient, with a weak hold on members during periods of membership. This is especially true when the results of this study are compared to studies that used older members.  相似文献   
254.
255.
Greer  Scott L.  Trump  Benjamin 《Policy Sciences》2019,52(4):505-524
Policy Sciences - Regulation of rapidly developing changing policy areas is a well-known challenge for any government. It can involve balancing factors from elite factional politics to development...  相似文献   
256.
In current casework, most post-cyanoacrylate stains rely on luminescence emission in the visible region (400-700 nm). While traditional stains such as rhodamine 6G work well under most circumstances, some surfaces may generate background luminescence under the same conditions. Detection in the near-infrared region (NIR > 700 nm) has shown to be effective in minimizing the interferences from such surfaces. The laser dye styryl 11 generated strongly luminescent fingermarks when applied after cyanoacrylate fuming on all surfaces tested. When compared to rhodamine 6G, the dye was superior only when viewed in the NIR. Styryl 11 was subsequently combined with rhodamine 6G, and the mixed stain formulation (named StaR 11 by the authors) induced stronger luminescence compared with styryl 11 alone with an ability to visualize in both the visible and NIR regions. Reliable and consistent results were obtained when using either styryl 11 alone or the STaR 11 mixture. The enhancement achieved did not otherwise vary depending on the source of the fingermark secretions. With visualization possible in both the visible and NIR regions, the styryl 11/rhodamine 6G mixture showed significant potential as a post-cyanoacrylate stain.  相似文献   
257.
Research in recent decades has shown that although conventional fisheries management strategies such as fishing seasons, size limits, or gear restrictions can provide sufficient biological protection to fisheries stocks, they do not necessarily lead to satisfactory social or economic outcomes. In their stead, the merits and shortcomings of a variety of alternate management systems, including individual transferable quotas, have been proposed, implemented, and analyzed. Few investigations, however, have examined actual fishers' preferences for different management systems. Integrating results from a mail survey of North Carolina commercial fishers with their individual harvest histories and sociodemographic profiles shows that economic and cultural variables both play a significant role in management system preference. The analysis introduces the use of the Herfindahl-Hirschman Index (HHI), a measure of investment diversity, as a measure of diversity in fisheries harvests and demonstrates an association with management preferences. Social and family factors are also notable indicators.  相似文献   
258.
259.
This paper articulates a citation‐based approach to science policy evaluation and employs that approach to investigate the impact of the United States’ 2001 policy regarding the federal funding of human embryonic stem cell (hESC) research. We evaluate the impact of the policy on the level of U.S. hESC research, the U.S. position at the knowledge frontier, and the strategic response of U.S. scientists. Consistent with recent research on the science of science and innovation policy, we employ a difference‐in‐differences approach using bibliometric data with the aim of analyzing the causal impact of the policy on cumulative research. Our estimates suggest that in the aftermath of the 2001 policy, U.S. production of hESC research lagged 35 to 40 percent behind anticipated levels. However, this relative decline was largely concentrated in the years 2001 to 2003 and ameliorated over time. The rebound in U.S. hESC research after 2003 was driven by contributions by researchers at elite U.S. institutions and U.S. researchers who collaborated with international partners. The results suggest that scientists respond strategically to research funding restrictions and that modest science policy shifts can have a significant influence on the within‐country composition of research and the pattern of global research collaboration.  相似文献   
260.
This article examines the origins and main strands of recent debates within the international development community regarding the tensions between increasing aid allocation to so-called ??fragile states?? and growing domestic and international pressure for donors to demonstrate measurable results and returns on their investments. With particular reference to the UK context, the paper examines how the confluence of these two agendas is being viewed, at least publicly, and some of the main arguments that have been put forward about why they may be difficult to pursue simultaneously. It asks whether or not it is feasible that donors will explicitly seek to address and resolve the apparent trade-offs between these two agendas, and concludes that in both international and domestic political arenas, ??good enough?? aid effectiveness, or a more nuanced, ??developmentised?? understanding of value for money, are unlikely to become palatable or politically viable any time soon.  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