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   66454篇
  免费   3298篇
各国政治   4486篇
工人农民   2913篇
世界政治   5923篇
外交国际关系   3787篇
法律   30650篇
中国共产党   9篇
中国政治   745篇
政治理论   20301篇
综合类   938篇
  2023年   360篇
  2021年   402篇
  2020年   1163篇
  2019年   1521篇
  2018年   1661篇
  2017年   1952篇
  2016年   2158篇
  2015年   1834篇
  2014年   2098篇
  2013年   10517篇
  2012年   1564篇
  2011年   1654篇
  2010年   1796篇
  2009年   2054篇
  2008年   1700篇
  2007年   1652篇
  2006年   1836篇
  2005年   1734篇
  2004年   1638篇
  2003年   1416篇
  2002年   1489篇
  2001年   1432篇
  2000年   1192篇
  1999年   1075篇
  1998年   1016篇
  1997年   901篇
  1996年   905篇
  1995年   908篇
  1994年   916篇
  1993年   948篇
  1992年   907篇
  1991年   937篇
  1990年   885篇
  1989年   917篇
  1988年   927篇
  1987年   939篇
  1986年   933篇
  1985年   1017篇
  1984年   910篇
  1983年   955篇
  1982年   870篇
  1981年   822篇
  1980年   633篇
  1979年   657篇
  1978年   574篇
  1977年   516篇
  1976年   471篇
  1975年   399篇
  1974年   417篇
  1973年   406篇
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
1.
Natur und Recht - Angesichts der enormen Zerschneidungswirkung von Bundesfernstraßen werden Grünbrücken in der Bundesrepublik vermehrt errichtet, sodass sich die Frage der...  相似文献   
2.
Critical Criminology - The end of the crack-cocaine crisis and collapse of open-air urban drug markets over the last two decades have reshaped the contours of gang life and gang violence in the...  相似文献   
3.
Often, criminal acts involving a vehicle are caught on digital video surveillance systems. While potentially useful for an investigation, the recording conditions are typically less than optimal for the extraction of key information for the identification of the perpetrator, such as a license plate. Providing the make, model and year of a questioned vehicle is a common request for examiners, to narrow the field of potential suspect vehicles. This study seeks to compare the performance of a nonpeer-reviewed make, model, and year determination between two separate groups, specifically, trained forensic image examiners and nontrained individuals. Results show that even with varied image capture conditions and quality, the trained forensic image examiners more correctly and completely identified the test group of questioned vehicles make, model, and year.  相似文献   
4.
Public administration scholarship on race and gender is motivated by normative concerns about social equity, and dominated by work on bureaucracy and its representativeness. Despite decades of research on race and gender in public administration, there has been limited engagement with racializing and gendering processes. Relatedly, scant attention is paid to other disciplines that center on race and gender in theorizing. The purpose of this review is to explore public administration scholarship on race and gender in the context of allied social science disciplines, reveal limits of current approaches in public administration, and articulate strategies for enhancing understanding of race and gender in public administration scholarship. We use bibliometric and content analysis methods to map the intellectual structure of social science scholarship on race and gender, highlight public administration's place in this structure, and compare public administration scholarship on race and gender with other social science disciplines.  相似文献   
5.
This research demonstrates the value of laser scanning confocal microscopy (LSCM) as a research tool in osteological studies, and diagenetic studies in particular. LSCM combines properties of light and scanning electron microscopy using laser light to excite fluorophores throughout the z-axis, developing a 3-D image. Using differential staining and selecting for specific wavelengths of light, one can image targeted materials. This research is divided into two parts: visualizing bone structures such as proteins and their decompositional products and visualizing diagenesis. Part one of this study utilized pig bones as a means of testing the overall ability of LSCM to fluoresce bone. Twenty-three samples were imaged, including 13 samples from a decompositional study conducted 5 years previous, and 10 “fresh” samples collected from a commercial butcher. This part of the study determined that protein and organic components of the bone could be fluoresced and diagenetic alteration could be imaged. The second part of the study used human samples as a means of imaging and mapping diagenetic alterations. The second part of the study used 13 samples, including 4 clinical, 7 ancient, and 2 modern controls. The pig study used Basic Fuchsin and SlowFade Gold stains, while the human study used toluidine blue. Images were also taken with unstained elements. The results of the non-human study found that a fresh bone fluoresced differently than that of a 5-year subset, while the results of the human study confirmed these findings and determined that the bone diagenesis can be mapped using LSCM.  相似文献   
6.
7.
Recent years have seen an increase in the use of delegated legislation to implement major policy decisions in the UK. This has exacerbated the longstanding criticism that Westminster lacks sufficiently robust procedures for parliamentary scrutiny of delegated legislation. However, the UK is not the only country to use delegated legislation, or to face the challenge of ensuring it receives adequate parliamentary scrutiny. This article therefore places the UK system in wider context by comparing it to six other national parliaments. We highlight one comparative strength of the UK system, two weaknesses it shares with the other six cases, and one way in which the UK might learn lessons from elsewhere. Overall, our evidence suggests that no one country offers a clear template for more rigorous parliamentary scrutiny of delegated legislation. Successful reform of the UK's system is likely to require creative procedural innovation.  相似文献   
8.
In the 1980s, governments around the world adopted New Public Management ideas about inserting competition into government as a way to improve the performance of public organizations. In many nations, contracting out was one method of making governments more businesslike. Yet, there have been few studies of how government contracting behaviors have changed since the early 1980s. We replicate Ferris and Graddy's classic 1986 study of local government production and sector choice to assess how public procurement has changed over the past 35 years. Our findings show that today, contracting out is more commonly used across 25 local government service areas. In contrast to the original study, much of the growth has been in government-to-government contracts. For profit firms are also winning more contracts for high transaction cost work, while nonprofits are receiving fewer government contracts in nearly every service area. Our analysis suggests that contracting out remains of the highest importance in 21st-century governance and that additional research is needed on how to manage contracts to achieve the best value.  相似文献   
9.
In R (on the application of Friends of the Earth Ltd and others) v Heathrow Airport Ltd the UK Supreme Court allowed an appeal against the Court of Appeal's decision that there had been a series of legal errors in the designation of the Airport National Policy Statement. This case note analyses the case from an ‘internal’ doctrinal perspective and argues that the Supreme Court could have engaged more explicitly with the legal issues that arise from climate change legislation for administrative law adjudication. For courts to adjudicate well in such circumstances they need to be prepared to develop administrative law doctrine, particularly in light of the issues of integrating climate change into public decision-making and of scientific/policy uncertainty which lie in the background of climate change legislation.  相似文献   
10.
Journal of Quantitative Criminology - We tested the impact of juvenile arrest on asset accumulation, debt accumulation, and net worth from ages 20–30. We also examined whether indicators of...  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