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   6137篇
  免费   239篇
各国政治   428篇
工人农民   186篇
世界政治   619篇
外交国际关系   443篇
法律   2580篇
中国政治   51篇
政治理论   1998篇
综合类   71篇
  2023年   41篇
  2022年   26篇
  2021年   54篇
  2020年   107篇
  2019年   153篇
  2018年   167篇
  2017年   196篇
  2016年   201篇
  2015年   117篇
  2014年   174篇
  2013年   1031篇
  2012年   173篇
  2011年   177篇
  2010年   173篇
  2009年   181篇
  2008年   157篇
  2007年   221篇
  2006年   192篇
  2005年   225篇
  2004年   230篇
  2003年   209篇
  2002年   226篇
  2001年   122篇
  2000年   117篇
  1999年   98篇
  1998年   90篇
  1997年   94篇
  1996年   90篇
  1995年   92篇
  1994年   94篇
  1993年   79篇
  1992年   84篇
  1991年   92篇
  1990年   62篇
  1989年   65篇
  1988年   64篇
  1987年   63篇
  1986年   67篇
  1985年   64篇
  1984年   55篇
  1983年   62篇
  1982年   48篇
  1981年   55篇
  1980年   38篇
  1979年   37篇
  1978年   32篇
  1977年   33篇
  1976年   30篇
  1975年   16篇
  1974年   15篇
排序方式: 共有6376条查询结果,搜索用时 46 毫秒
921.
Abstract. The creation of a metropolitan government in the Greater Vancouver urban region was a deliberate policy adopted by Municipal Affairs Department strategists in the mid-1960s even though for several years the Minister publicly argued that the regional district was not a metropolitan government. The policy was essentially to create a local federation variety of metropolitan government. The strategy was to gently impose an administrative structure without any functions at 1st so as to not unduly compel the local leaders or predetermine those matters on which inter-municipal cooperation was to be based. In time, the local leaders themselves became aware of the potential of this innocuous regional district. The province remained ready to impose an integration of those functions more efficiently performed at the regional level in the event of any recalcitrance developing within established bureaucracies or local political units which was inimical to the provincial policy. The uniqueness of the experiment in BC had two main features: the low-key initiative of the province and the basic flexibility of the new form of government which permitted adaptation to the forces for metropolitan functional integration coming from both the provincial level and the local level. The success in launching regional overnment in British Columbia was to a large extent a result of the heeding, by the strategists, of the experience in the United States, in other places in Canada, and an earlier attempt in the late 1950s in Vancouver. Sommaire. La création d'un gouvernement métropoIitain dans la région urbaine du Grand Vancouver a été une politique préméditée qui a été adoptée par les stratèges du Ministère des Affaires municipales am environs de 1965, bien que le Ministère ait affirmé publiquement pendant longtemps que le “district régional” n'était pas un gouvernement métropolitain. La politique a été essentiellement de créer un genre de gouvernement métropolitain ressemblant à une fédération de municipalités. La stratégie à consisté d'abord dans l'imposition d'une structure administrative sans aucune function faint de be pas forcer la main aux chefs Iocaux ou de ne pas déterminer à l'avance les questions qui serviraient de base à la collaboration intermunicipale. Plus tard, les chefs locaux se sont rendus compte du potentiel de ce “district régional” inoffensif. Le gouvernement provincial de son côtéétait prêt à imposer une intégration régionale des fonctions qui s'exécutent mieux à ce niveau advenant le cas oú une résistance se développerait au sein des bureaucraties ou des cons& municipaux, des oppositions qui iraient à l'encontre de la politique provinciale. Les deux traits principaux de cette expérience en Colombie-Britannique furent: l'initiative discrète de la province et f flexibilité de base de ce nouveau genre de gouvernement qui ont permis une adaptation aw forces locales et provinciales pour une intégration métropolitaine des fonctions municipales. Le lancement du gouvemement régional en Colombie-Britannique fut un grand succès dûá l'attention que les stratèges ont porté aux expéiences américaines et canadiennes ainsi qu'à la tentative antérieure faite à Vancouver entre 1957 et 1960.  相似文献   
922.
Nearly a decade ago, fentanyl reappeared in the United States illicit drug market. In the years since, overdose deaths have continued to rise as well as the amount of fentanyl seized by law enforcement agencies. Research surrounding fentanyl production has been beneficial to regulatory actions and understanding illicit fentanyl production. In 2017, the Drug Enforcement Administration (DEA) began collecting seized fentanyl samples from throughout the United States to track purity, adulteration trends, and synthetic impurity profiles for intelligence purposes. The appearance of a specific organic impurity, phenethyl-4-anilino-N-phenethylpiperidine (phenethyl-4-ANPP) indicates a shift in fentanyl production from the traditional Siegfried and Janssen routes to the Gupta-patent route. Through a collaboration between the DEA and the US Army's Combat Capabilities Development Command Chemical Biological Center (DEVCOM CBC), the synthesis of fentanyl was investigated via six synthetic routes, and the impurity profiles were compared to those of seized samples. The synthetic impurity phenethyl-4-ANPP was reliably observed in the Gupta-patent route published in 2013, and its structure was confirmed through isolation and structure elucidation. Organic impurity profiling results for illicit fentanyl samples seized in late 2021 have indicated yet another change in processing with the appearance of the impurity ethyl-4-anilino-N-phenethylpiperidine (ethyl-4-ANPP). Through altering reagents traditionally used in the Gupta-patent route, the formation of this impurity was determined to occur through a modification of the route as originally described in the Gupta patent.  相似文献   
923.
924.

Research Summary

The Kansas City Preventive Patrol Experiment (KCPPE) was seen by its developers to have produced “consistent evidence of the lack of effects of any consequence on crime,” a conclusion that was to have a strong impact on assumptions about police patrol for almost half a century. We identified the original official crime data from the KCPPE, and reanalyzed outcomes focusing on a comparison of the “proactive” versus “control” beats (“reactive beats” were criticized because of violations of treatment integrity); examining broad categories of crime (to increase statistical power); and using count regression models. Our findings are not unequivocal, but point to modest impacts of police patrol on crime in police beats.

Policy Implications

Our findings suggest that lessons drawn for half a century from the KCPPE need to be revisited. The KCPPE does not show that police patrol in large areas has no influence on crime, and this finding is consistent with several more recent studies. At the same time, we note that the effects of patrol in the KCPPE using our analysis strategy, and those found in other studies of preventive patrol in larger areas, are about half that found in hot spots policing studies. This suggests that police agencies ideally should invest in focused hot spots policing initiatives. However, absent an ability to manage such initiatives, or the crime analysis capabilities to identify crime hot spots routinely, simpler preventive patrol schemes to utilize uncommitted patrol time can be seen as potentially effective in preventing crime.  相似文献   
925.
This article examines Soviet Bloc and Western bugging of their opponents’ diplomatic premises in the early Cold War, from 1945 to the late 1960s. It explains the process of audio surveillance, identifies significant cases of bugging and describes the countermeasures taken by Western states. The paper concludes that the Soviet Union was able to gather a considerable amount of intelligence from bugging Western embassies in Moscow during the early Cold War. In particular, bugging enabled the Soviets to break the diplomatic ciphers of the United States, Britain and West Germany.  相似文献   
926.
927.
The present study examines the effects of language intensity on presidential candidates' credibility. We manipulated language intensity levels and experience levels for hypothetical candidates for president of the United States. Manipulation checks confirmed the effectiveness of the experimental conditions. The dimensions of source credibility, character, and authoritativeness were confirmed using confirmatory factor analysis. Analysis of variance indicated that candidates using low-intensity language received higher scores on character than did candidates using high-intensity language. Experienced candidates received higher scores on authoritativeness than did inexperienced candidates. Implications for political marketing of candidates are discussed.  相似文献   
928.
The concept of materiality is attracting increasing attention in corporate sustainability reporting. This paper offers a preliminary examination of the extent to which the UK's leading retailers are currently addressing materiality in their sustainability reports and offers some wider reflections on the ways retailers are embracing materiality. The paper begins with a short discussion of the concept of materiality and on its determination and the paper draws its empirical material from the most recent sustainability reports posted on the Internet by the UK's top ten retailers. The findings reveal that there are significant variations in the extent to which the UK's leading retailers are embracing materiality and that there is no evidence of a sector specific approach to materiality within the UK retail community. More generally the authors argue that the methods currently being used to determine materiality are flawed and that retailers seem likely to continue to face challenges in looking to reconcile the relationships between executive management teams, investors and a wide range of stakeholders in operationalising the concept of materiality. The paper provides an accessible review of the extent to which the UK's leading retailers are currently embracing materiality as part of the sustainability reporting process and as such it will interest academics, students and practitioners interested in retailing and corporate sustainability. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   
929.
Amidst increasing and seemingly intransigent inequalities, unresponsive institutions, and illegible patterns of social change, political theorists are increasingly faced with questions about the viability of democracy in the contemporary age. One of the most prominent voices within this conversation has been that of Sheldon Wolin. Wolin has famously argued that democracy is a ‘fugitive’ experience with an inherently temporary character. Critics have pounced on this concept, rejecting it as an admission of defeat or despair that is at odds with the formation of democratic counter-power. In this article, I push back against this view of fugitive democracy. I do so by contextualizing the idea within Wolin’s broader democratic theory, and especially his idea of the ‘multiple civic self’, in order to give a more coherent form to a conception of citizenship often concealed by the attention given to the supposedly momentary nature of democracy. This all too common misreading of fugitive democracy has significant stakes, because it shapes not only how we approach Wolin’s impact as a political theorist, but also how we approach practices of democratic citizenship and how we think about political theory and political science’s relationship to those practices.  相似文献   
930.
Transparency in the extractives sector is widely seen as an important tool for improving accountability and deterring corruption. Yet for those very reasons, it is a puzzle that so many governments in corruption‐prone countries have voluntarily signed up to greater scrutiny in this area by joining the Extractive Industries Transparency Initiative (EITI). We argue that EITI serves as a reputational intermediary, whereby reformers can signal good intentions and international actors can reward achievement. International and domestic actors thus utilize EITI to diffuse the norm of resource transparency and to advance reformist aims in a highly problematic policy area.  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