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   10346篇
  免费   107篇
各国政治   384篇
工人农民   1156篇
世界政治   445篇
外交国际关系   440篇
法律   5578篇
中国政治   18篇
政治理论   2402篇
综合类   30篇
  2023年   8篇
  2021年   17篇
  2020年   21篇
  2019年   48篇
  2018年   1332篇
  2017年   1269篇
  2016年   1087篇
  2015年   113篇
  2014年   67篇
  2013年   375篇
  2012年   260篇
  2011年   981篇
  2010年   1063篇
  2009年   637篇
  2008年   811篇
  2007年   768篇
  2006年   90篇
  2005年   138篇
  2004年   243篇
  2003年   216篇
  2002年   114篇
  2001年   46篇
  2000年   57篇
  1999年   45篇
  1998年   44篇
  1997年   49篇
  1996年   50篇
  1995年   50篇
  1994年   65篇
  1993年   32篇
  1992年   22篇
  1991年   31篇
  1990年   21篇
  1989年   17篇
  1988年   18篇
  1987年   16篇
  1986年   12篇
  1985年   17篇
  1984年   18篇
  1983年   30篇
  1982年   17篇
  1981年   17篇
  1980年   17篇
  1979年   12篇
  1978年   15篇
  1977年   19篇
  1976年   9篇
  1974年   6篇
  1973年   6篇
  1966年   7篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
191.
As the new administration takes office it is important to maintain some perspective on the economicchallenges facing the nation. The situation is far better today than when President Obama took office in2009 and 2013. Unemployment is close to pre-Great Recession levels, incomes are rising and poverty ratesfalling. We face economic challenges but the most important ones are not international trade or immigration.Sluggish economic growth, a fiscal crisis in our entitlement programs, high inequality in incomes andwealth, and climate change are what should demand our attention.  相似文献   
192.
193.
In this piece, I argue that promises need not be kept just because they were made. This is not to say, however, that unwise, unhappy, and unfortunate promises do not generate obligations. When broken promises will result either in wrongful gains to promisors or wrongful losses to promisees, obligations of corrective justice will demand that such promises be kept if their breach cannot be fully repaired. Thus, when a broken promise will constitute a deliberate loss transfer for personal gain, the duty not to exact unjust enrichment (a wrongful gain) will require a promisor either to honor her promise or craft a means of ensuring that the promisee’s impoverishment is not traded for her enrichment. And when a broken promise will constitute the culpable imposition of a reliance-based injury on a nonculpable promisee (a wrongful loss), the duty to make others whole when one has purposefully, knowingly, or recklessly injured them will require one either to keep one’s promise or to fashion a remedy for its breach that ensures that the promisee is left no worse off than he would be had the promise not been made. This account explicitly parts ways with normative powers theories of promising. It places no weight at all on the raw fact that a promise has been made. Instead, it locates the gravamen of a promissory violation in the harm that is caused to a promisee who nonculpably relies upon and changes her position in anticipation of the prediction about the promisor’s future conduct that is embedded in his promise. Absent any adverse reliance on the part of a promisee, there is nothing that gives rise to an obligation of performance or repair on the part of the promisor. But this account is also to be distinguished from utilitarian theories that take promises to be instruments of wealth maximization that properly give way whenever the reason for honoring them speaks in favor of violating them. On my account, the balance of reasons for action that determines the morality of performance includes deontological rights and duties, agent-relative permissions, and Hohfeldian liberties. As I shall argue, even if one rightly concludes that one has no duty either to keep a promise or to craft a remedy for its breach, one must nevertheless remember that virtue requires one to be or become the kind of person who often goes beyond the call of duty. But the fact that virtue often requires us to do what we have no duty to do should not cause us to confuse its conditions with the conditions of right and wrong action. We have a duty to keep promises or to otherwise protect the reliance interests that they generate only when failing to do so will lead either to our own unjust enrichment or to others’ unjust injury. And this means that we have a duty to keep promises in far fewer circumstances than is commonly believed.  相似文献   
194.
We discuss the mechanisms related to quadratic voting, from Vickrey’s counter-speculation mechanism and his second-price auction, through the family of Groves mechanisms and its most notable member, the Clarke mechanism, to the expected externality mechanism, Goeree and Zhang’s mechanism, the Groves–Ledyard mechanism, and the Hylland–Zeckhauser mechanism. We show that each mechanism that involves collective decisions has a quadratic aspect and that all of the mechanisms that we discuss are applications of the fundamental insight that for a process to be efficient, all parties involved must bear the marginal social costs of their actions.  相似文献   
195.
196.
Historical Foundations of the Common Law, Second Edition. S.F.C. Milson . London 1981. Butterworths. pp xii &; 475 (incl. Index). £18 cased, £11.95 limp.?

Marriage Settlements 1601–1740. Lloyd Bonfield. Cambridge 1983. Cambridge University Press, xviii &; 136 pp. (incl. index). £19.50.

The English and Colonial Bars in the 19th Century, Daniel Duman, London, 1983. Croom Helm, xv + 228 pp. (incl. index). £13.95.  相似文献   
197.
The forensic science community raised the need for improved evidence recognition, collection, and visualization analytical instrumentation for field and laboratory use. While the 3D optical techniques for imaging static objects have been extensively studied, there is still a major gap between current knowledge and collecting high‐quality footwear and tire impression evidence. Among optical means for 3D imaging, digital fringe projection (DFP) techniques reconstruct 3D shape from phase information, achieving camera‐pixel spatial resolution. This paper presents a high‐resolution 3D imaging technology using DFP techniques dedicated to footwear and tire impression capture. We developed fully automated software algorithms and a graphical user interface (GUI) that allow anyone without training to operate for high‐quality 3D data capture. We performed accuracy evaluations and comparisons comparing with the commercial high‐end 3D scanner and carried out qualitative tests for various impressions comparing with the current practices. Overall, our technology achieves similar levels of accuracy and resolution with a high‐end commercially available 3D scanner, while having the merits of being (1) more affordable; (2) much easier to operate; and (3) more robust. Compared with the current practice of casting, our technology demonstrates its superiority because it (1) is non‐destructive; (2) collects more evidence detail than casts, especially when an impression is fragile; (3) requires less time and money to collect each piece of evidence; and (4) results in a digital file that can easily be shared with other examiners.  相似文献   
198.
Abstract

As the largest source of carbon-free energy in the United States, nuclear energy must play a vital role in reducing emissions. This article suggests the Green New Deal, an ambitious federal proposal to address climate change, should aim to preserve the existing nuclear fleet by authorizing states to establish zero emission credit (“ZEC”) programs. The ZEC programs will provide credits, in the form of revenue, for the carbon-free attribute of nuclear energy. This article posits the ZEC programs should be based on a model ZEC program developed by the Federal Energy Regulatory Commission and explicitly authorized by amendment of the Federal Power Act to avoid issues of preemption.  相似文献   
199.
200.
ABSTRACT

As has been demonstrated by scholars, different levels of a polity may encompass different political regimes. In this study we examine variations in regional political regimes which have developed under Russia's system of electoral authoritarianism. Comparing the results of two cycles of regional assembly elections (2008–12 and 2013–17) we analyse and compare elections results and levels of electoral contestation in both the party list (PL) and single member district (SMD) contests. This allows us to identify the range of sub-national regime variations: ‘hegemonic authoritarian’, ‘inter-elite bargain authoritarian’, ‘clearly-competitive authoritarian’, and ‘moderately-competitive authoritarian’ regions. Approximately half of the regions demonstrate stable electoral patterns across both cycles. At the same time, none of the regions go beyond the authoritarian limitations imposed by the Russian regime. The variation is explained by a combination of structural and agency factors with a prevalence of the latter.  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