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   5339篇
  免费   203篇
各国政治   286篇
工人农民   206篇
世界政治   401篇
外交国际关系   180篇
法律   3271篇
中国共产党   1篇
中国政治   35篇
政治理论   1124篇
综合类   38篇
  2020年   69篇
  2019年   80篇
  2018年   111篇
  2017年   130篇
  2016年   134篇
  2015年   129篇
  2014年   110篇
  2013年   594篇
  2012年   145篇
  2011年   143篇
  2010年   122篇
  2009年   121篇
  2008年   146篇
  2007年   151篇
  2006年   147篇
  2005年   147篇
  2004年   149篇
  2003年   140篇
  2002年   138篇
  2001年   190篇
  2000年   177篇
  1999年   138篇
  1998年   78篇
  1997年   56篇
  1996年   53篇
  1995年   63篇
  1994年   60篇
  1993年   50篇
  1992年   95篇
  1991年   91篇
  1990年   107篇
  1989年   93篇
  1988年   86篇
  1987年   87篇
  1986年   112篇
  1985年   113篇
  1984年   79篇
  1983年   79篇
  1982年   52篇
  1981年   48篇
  1980年   48篇
  1979年   56篇
  1978年   55篇
  1976年   37篇
  1975年   46篇
  1974年   62篇
  1973年   56篇
  1972年   42篇
  1970年   35篇
  1969年   42篇
排序方式: 共有5542条查询结果,搜索用时 22 毫秒
961.
This article uses data from the 2008 Cooperative Congressional Election Study to explain weak support for public financing of congressional campaigns. Previous studies lack theory to explain variation in support and use a flawed measure of the dependent variable. We argue that low support reflects a failure resulting from a collective action dilemma. Citizens desire a campaign finance system that weans politicians from private donors, but are unwilling to pay a small amount in taxes to support public financing. In contrast to conventional wisdom, we show that support for public financing is highest among those perceived to benefit the most from the current system. Our results suggest that most Americans would rather not pay for politics, and that reform proposals must avoid incurring transparent costs on individual citizens to pay for reform.  相似文献   
962.
The political consequences of the crisis in world financial markets are only beginning to be understood. In this article, we take up one of these many repercussions by examining public beliefs of who’s to blame for a complex and unparalleled set of events. Analyses of survey data from Britain find that while most assign responsibility for the crisis to market actors, the likelihood of blaming governments, as opposed to blaming banks and investors, is greater among low sophisticates and Conservative Party identifiers. We further show how elite messages from competing political elites evolved over-time and were reflected in mass beliefs about the crisis. Results highlight the centrality of partisan cues and, in particular, of political sophistication in understanding the dynamics of responsibility attributions. Lastly, we estimate the consequences of blaming the government for the crisis for voter choice.  相似文献   
963.
Self-interest is required for survival and reproduction and lies at the foundation of economic theory. But the presence of social groups with functional internal structure is incompatible with unmitigated self-interest. This essay compares the control of self-interest in humans and honey bees, showing the reasons for different evolutionary outcomes. The less effective checks of self-interest in humans lead to familiar forms of social discord, and in our capitalistic democracy, negative economic and ecological consequences of growing scope. Change will require moderating some firmly held political beliefs.  相似文献   
964.
For a single-winner multi-candidate election, it is broadly accepted that the Condorcet candidate (if one exists) should win. Voting systems do not always elect the Condorcet winner. Public opinion polls are not generally designed to try to identify a Condorcet candidate. They could easily be constructed to do so, however. The resulting process may be called Condorcet polling, for which various designs are presented herein. Information from Condorcet polling may enable some voters, under a plurality or runoff system, to bring about an outcome they prefer by voting strategically for the Condorcet candidate when they would not otherwise do so.  相似文献   
965.
966.
3'-Hydroxystanosolol detection in biological fluids at pg levels by gas chromatography/tandem mass spectrometry is described. Gas chromatography/high resolution mass spectrometry results can be confirmed with gas chromatography/tandem mass-spectrometry.  相似文献   
967.
Superwarfarin exposure is a growing health problem, described in many countries. The authors report a case of suspicious chlorophacinone poisoning with a problematic diagnosis. They review the literature and discuss particularities of anticoagulant rodenticide intoxication, as well as the apparent contradiction between anticoagulant intoxication and lethal thrombosis.  相似文献   
968.
Optimisation and harmonisation of analytical and statistical methodology have been carried out between two forensic laboratories (Lausanne, CH and Lyon, F) in order to provide drug intelligence for cross-border cocaine seizures. The aim was to improve the gas chromatographic analysis of cocaine samples for profiling. Some important validation parameters were tested to verify the developed method and demonstrate its profiling capacity: the selectivity of the method with retention time reproducibility, the choice of a derivatisation agent improving the chromatography (MSTFA, BSA, TMSI and BSTFA+TMCS 1%), the cutting agents influence (matrix effect), the influence of the sample storage conditions and the sample quantity to weigh for analyses. Eight main alkaloids, which represent the sample signature, have been selected: ecgonine methyl ester, ecgonine, tropacocaine, benzoylecgonine, norcocaine, cis- and trans-cinnamoylcocaine and 3,4,5-trimethoxycocaine. Their stability in the solvent used (CHCl(3)/pyridine) was demonstrated. In order to reach the final objective, which is the comparison of samples seized and analyzed in two different laboratories, the harmonisation of the profiling method between the two laboratories had to be ensured and is the subject of ongoing research.  相似文献   
969.
The authors present a method of hingamine identification in non-biological substances (tablets, powder, syringes) and biological fluids (blood, urine). Isolation was made with chloroform in pH 10. Identification was conducted with thin-layer chromatography, gas chromatography/mass-spectrometry, high-performance liquid chromatography, spectrophotometry in UV region. The quantity was estimated with spectrophotometry in UV region, high-performance liquid chromatography and high-performance thin-layer chromatography. The results of the three methods are comparable.  相似文献   
970.
Although narrative reviews have suggested that "youth psychopathy" is a strong predictor of future crime and violence, to date no quantitative summaries of this literature have been conducted. We meta-analyzed recidivism data for the Psychopathy Checklist measures across 21 non-overlapping samples of male and female juvenile offenders. After removing outliers, psychopathy was significantly associated with general and violent recidivism (r (w)'s of .24 and .25, respectively), but negligibly related to sexual recidivism in the few studies examining this low base rate outcome. Even after eliminating outliers, however, considerable heterogeneity was noted among the effects, with some of this variability being explained by the gender and ethnic composition of the samples. Effect sizes for the small number of female samples available for analysis were mostly small and nonsignificant, and psychopathy was a weaker predictor of violent recidivism among more ethnically heterogeneous samples. In relation to predicting both general and violent recidivism, psychopathy performed comparably to an instrument designed specifically to assess risk, the Youth Level of Service/Case Management Inventory (Hoge & Andrews, 2002).  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