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   1756篇
  免费   519篇
各国政治   111篇
工人农民   10篇
世界政治   36篇
外交国际关系   82篇
法律   1274篇
中国共产党   16篇
中国政治   68篇
政治理论   534篇
综合类   144篇
  2024年   1篇
  2023年   4篇
  2022年   4篇
  2021年   45篇
  2020年   56篇
  2019年   166篇
  2018年   135篇
  2017年   120篇
  2016年   145篇
  2015年   130篇
  2014年   152篇
  2013年   327篇
  2012年   224篇
  2011年   168篇
  2010年   110篇
  2009年   68篇
  2008年   92篇
  2007年   84篇
  2006年   71篇
  2005年   43篇
  2004年   33篇
  2003年   44篇
  2002年   24篇
  2001年   14篇
  2000年   9篇
  1999年   5篇
  1998年   1篇
排序方式: 共有2275条查询结果,搜索用时 15 毫秒
181.
Megaprojects are systems of highly concentrated power whose footprints, or radius of effects, are without precedent in human history. Once upon a time, even under imperial conditions, most people on our planet lived and loved, worked and played within geographically limited communities. They never had to reckon with all of humanity as a factor in their daily lives. Whenever they acted recklessly within their environment, for instance, they had the option of moving on, safe in the knowledge that there was plenty of Earth and not many others. Whenever bad things happened, they happened within limits. Their effects were local. The politics of megaprojects radically alters this equation; it poses new questions about the governance of risk and the nature and limits of democratic politics. The politics of megaprojects—put simply—raises fundamental questions about the ‘life and death of democracy’.  相似文献   
182.
Consultation of scientific evidence by policy actors has been the foci of attention of knowledge utilization scholars for decades. The present study questioned the extent to which randomized controlled trials (RCTs)—generally seen as the gold standard of scientific research—are known and consulted by policy analysts in ministerial settings. Using cross‐sectional data collected in 17 ministries in Québec (Canada), our study showed that fairly high levels of policy analysts report never having heard of RCTs, thus possibly hindering effective communication of scientific results to relevant policy makers. Statistical analyses reveal the importance of cognitive factors in explaining both phenomena.  相似文献   
183.
In the aftermath of the August 2011 riots, politicians and commentators offered a range of explanations for the social unrest and wanton violence. Drawing on survey and focus‐group data, this paper investigates those explanations by analysing how socio‐economic, normative and political factors shape contemporary attitudes towards law breaking in Britain. The paper finds that both economic deprivation and personal moral values help to explain attitudes toward illegal behaviour, but citizens’ mistrust of political leaders and their disengagement from public affairs are also an important factor. The findings suggest that politicians who want to provide moral leadership need to do so through their actions as well as their words.  相似文献   
184.
法律冲突与制度扭曲环境下的投融资平台公司,从诞生之日起即具有结构性信用风险,而平台公司的信用风险与地方政府的信用具有相关性,其所具有的传导效应构成地方政府信用风险、宏观经济结构调整风险、土地政策调整风险、银行系统风险、财政风险这样一条具有多米诺骨牌效应的信用风险链并或将成为推手。加强地方政府的信用治理,从财政体制上、法律制度上规范地方政府信用秩序是防范平台公司信用风险的根本手段。  相似文献   
185.
Budget transparency has come to be considered a key aspect of governance. Over the past decade, donors have invested increasing resources in strengthening processes through which budget transparency in developing countries can be enhanced. According to the 2008 Open Budget Index (OBI) Report, however, aid dependency and budget transparency appear to be inversely correlated. This article looks at the role of donor agencies in promoting or preventing budget transparency in aid‐dependent countries. It looks at significant correlations across the whole sample of 84 countries covered in the 2008 OBI, and analyzes more specific data for a sub‐sample of 16 aid‐dependent countries, before selecting six countries for which more detailed findings are then presented. All of these countries have implemented reforms aimed at enhancing budget transparency, with substantial donor support. These, however, often had only limited success, partly because they were not well adapted to the local context, and partly because donors put limited emphasis on improving public access to budget information. Donor efforts were also often offset by other characteristics of donor interventions, namely their fragmentation, lack of transparency, and limited use of programme aid modalities such as budget support and pooled sector funding. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   
186.
The present study aims to contribute to the existing policy transfer research by examining the immature policy environments of post‐communist countries. To determine the main factors explaining the process of policy transfer, the establishment of probation systems in Estonia and Latvia is analyzed by applying a comparative case study design. The study demonstrates that timing is an important variable in the policy transfer in a transitional setting. A transitional context in itself is likely to lead to policy transfer because of urgent decision‐making needs, a shortage of domestic expertise and of financial resources. The process of policy transfer can be characterized as quite fortuitous: the choice of role models is limited to the existing or first contacts with foreign partners who are able to provide financial assistance. Improvement of administrative capacity is seen as a key factor in the shift from haphazard policy copying to responsible policy transfer. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   
187.
This article provides a practical guide for improving the quality of evidence‐based policy. Rather than adopting an approach that gives priority to particular types of research methodologies, this paper argues that evidence drawn from any methodology will improve if standards of transparency and accountability are followed in the process of gathering, analysing, interpreting, and presenting evidence for policy. The papers details what these standards of transparency and accountability mean in practice, how these standards can be achieved, and possible limits to their adoption.  相似文献   
188.
Several nondestructive and semidestructive analyses were used to discriminate colorless transparent polyethylene bags. Transparent plastic bags made from low-density and linear low-density polyethylene usually contain antiblocking agents to prevent sticking of the film, which makes it difficult to open the mouths of plastic bags. Inorganic antiblocking agents are uniformly dispersed in polyethylene films, so they are easily observed using optical microscopy. The particle size distributions of the antiblocking agents were compared by statistical tests. Particle composition was examined by elemental analysis using energy-dispersive X-ray spectrometry with a scanning electron microscope and by molecular vibration analysis using a sensitive microscopic Raman spectrometer. The compositions could be determined nondestructively on the basis of the results. These data reinforce the morphological discrimination. Morphological discrimination of the dispersed antiblocking agent powders, statistical comparison of particle size distributions, and compositional analysis of the antiblocking agents strengthen the ability to discriminate polyethylene films.  相似文献   
189.
Each digital camera has an intrinsic fingerprint that is unique to each camera. This device fingerprint can be extracted from an image and can be compared with a reference device fingerprint to determine the device origin. The complexity of the filters proposed to accomplish this is increasing. In this note, we use a relatively simple algorithm to extract the sensor noise from images. It has the advantages of being easy to implement and parallelize, and working faster than the wavelet filter that is common for this application. In addition, we compare the performance with a simple median filter and assess whether a previously proposed fingerprint enhancement technique improves results. Experiments are performed on approximately 7500 images originating from 69 cameras, and the results are compared with this often used wavelet filter. Despite the simplicity of the proposed method, the performance exceeds the common wavelet filter and reduces the time needed for the extraction.  相似文献   
190.
Abstract: The chemical profiling of illicit drugs is an important analytical tool to support the work of investigating and law enforcement authorities. In our work, comprehensive two‐dimensional gas chromatography–time‐of‐flight mass spectrometry (GC × GC‐TOFMS) combined with nontargeted, pixel‐based data analysis was adapted for the chemical profiling of 3,4‐methylenedioxymethamphetamine (MDMA). The validity and benefit of this approach was evaluated by analyzing a well‐investigated set of MDMA samples. Samples were prepared according to a harmonized extraction protocol to ensure the comparability of the chemical signatures. The nontargeted approach comprises preprocessing followed by analysis of variances as a fast filter algorithm for selection of a variable subset followed by partial least squares discriminant analysis for reduction to promising marker compounds for discrimination of the samples according to their chemical profile. Forty‐seven potential marker compounds were determined, covering most of the target impurities known from the harmonized one‐dimensional profiling as well as other compounds not previously elucidated.  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