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   1360篇
  免费   75篇
各国政治   81篇
工人农民   59篇
世界政治   106篇
外交国际关系   109篇
法律   741篇
中国政治   12篇
政治理论   317篇
综合类   10篇
  2023年   19篇
  2022年   19篇
  2021年   17篇
  2020年   39篇
  2019年   52篇
  2018年   48篇
  2017年   62篇
  2016年   73篇
  2015年   43篇
  2014年   61篇
  2013年   188篇
  2012年   64篇
  2011年   43篇
  2010年   42篇
  2009年   45篇
  2008年   49篇
  2007年   67篇
  2006年   49篇
  2005年   60篇
  2004年   45篇
  2003年   42篇
  2002年   49篇
  2001年   21篇
  2000年   23篇
  1999年   28篇
  1998年   18篇
  1997年   9篇
  1996年   7篇
  1995年   16篇
  1994年   11篇
  1993年   3篇
  1992年   22篇
  1991年   7篇
  1990年   6篇
  1989年   10篇
  1988年   9篇
  1987年   7篇
  1986年   9篇
  1985年   6篇
  1984年   5篇
  1983年   7篇
  1982年   4篇
  1981年   2篇
  1980年   4篇
  1975年   3篇
  1973年   3篇
  1969年   3篇
  1967年   2篇
  1966年   3篇
  1955年   1篇
排序方式: 共有1435条查询结果,搜索用时 15 毫秒
891.
Safety perceptions of residents are often analysed through surveys and compared with factual crime developments. Using the Dutch city of Rotterdam as an urban context of improved crime levels, this article provides a critique on standardised surveys in the research of safety perceptions and its presupposed connection to factual crime. Contrasting survey results from the Rotterdam Safety Index with qualitative data from 64 in-depth interviews in four districts, the qualitative narrative contradicts findings from the survey and implies more nuanced and diversified policy responses to safety issues. Because of the tendency of surveys to connect safety perceptions to factual crime, their unsuitability to catch subtle perceptions and their inability to expose new viewpoints, we argue for de-quantification: a lesser dependency on—but not a repeal of—survey data in this area, supplemented by a periodic qualitative approach in the research of crime and safety information (qualitative monitoring).  相似文献   
892.
This article examines the policies implemented by both the Obama and Trump Administrations toward Cuba to evaluate the claim that the ‘Thaw’ of relations between Washington and Havana represents a significant change in US foreign policy toward the island nation. Despite the appearance that the change in policy is a fundamental shift, I argue that the changes in US policy toward Cuba under both Obama and Trump represent changes in the means for pursuing the same historical objectives pursued by the Washington for the past few decades. In other words, the overall strategy and objective of US hegemony in Cuba is the same, with the only change being the means for achieving these ends. The central implication of this is that the ‘Thaw’ in relations between Cuba and the US represents a new, more ‘consensual’ means to instigating the same objective of provoking American-orchestrated political, economic, social and ideological changes in the island nation.  相似文献   
893.
894.
Netherlands International Law Review - This contribution maps recent global trends regarding the grounds for acquisition of citizenship by descent and by birth on a particular territory. Questions...  相似文献   
895.
896.
897.
There is an increasing demand for herbal medicines in weight loss treatment. Some synthetic chemicals, such as sibutramine (SB), have been detected as adulterants in herbal formulations. In this study, two strategies using near infrared (NIR) spectroscopy have been developed to evaluate potential adulteration of herbal medicines with SB: a qualitative screening approach and a quantitative methodology based on multivariate calibration. Samples were composed by products commercialized as herbal medicines, as well as by laboratory adulterated samples. Spectra were obtained in the range of 14,000–4000 per cm. Using PLS‐DA, a correct classification of 100% was achieved for the external validation set. In the quantitative approach, the root mean squares error of prediction (RMSEP), for both PLS and MLR models, was 0.2%w/w. The results prove the potential of NIR spectroscopy and multivariate calibration in quantifying sibutramine in adulterated herbal medicines samples.  相似文献   
898.
Perhaps policy‐makers are not the most progressive of actors when it comes to incorporating online technologies in their everyday workflow, but they are certainly not dismissive of the Internet and its potential for policy‐making (e.g. European Commission, 2011 , 2012 ). Could online insourcing, for example, be a way to improve the quality of new legislation? This article presents the current view from the European Commission (‘EC’). We have found that many of its Directorates‐General (‘DG’) are actively investigating into the possibilities of insourcing more and better policy contributors at the pre‐legislative stage, by means of online technology. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
899.
Crime, Law and Social Change - As existing literature on intergenerational continuity of criminal behavior is mainly based on data on ‘general’ offenders and their children, the current...  相似文献   
900.
Crime, Law and Social Change - As many scholars have shown, and other than what is suggested by their legal definition, migrant smuggling and human trafficking are not always easily distinguishable...  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