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   162篇
  免费   7篇
各国政治   12篇
工人农民   4篇
世界政治   24篇
外交国际关系   8篇
法律   75篇
政治理论   44篇
综合类   2篇
  2021年   1篇
  2020年   3篇
  2019年   8篇
  2018年   6篇
  2017年   10篇
  2016年   6篇
  2015年   3篇
  2014年   7篇
  2013年   19篇
  2012年   7篇
  2011年   3篇
  2010年   5篇
  2009年   8篇
  2008年   10篇
  2007年   4篇
  2006年   7篇
  2005年   3篇
  2004年   4篇
  2003年   5篇
  2002年   2篇
  2001年   4篇
  2000年   6篇
  1999年   1篇
  1998年   1篇
  1997年   3篇
  1996年   1篇
  1995年   3篇
  1994年   2篇
  1993年   1篇
  1991年   1篇
  1990年   1篇
  1989年   1篇
  1988年   3篇
  1986年   5篇
  1985年   2篇
  1984年   1篇
  1983年   2篇
  1981年   1篇
  1980年   1篇
  1978年   1篇
  1977年   2篇
  1972年   2篇
  1969年   1篇
  1968年   2篇
排序方式: 共有169条查询结果,搜索用时 15 毫秒
121.
122.
We studied all individuals (= 41) who had been found not guilty by reason of insanity for arson and who were committed to a California state psychiatric hospital on October 1, 2016 in a cross‐sectional analysis. This group of insane arsonists contained 33 (80.5%) males and eight (19.5%) females with a mean age at the time of the index arson of 35.9 years. At least 87.8% (= 36) were considered to not have been participating in psychiatric treatment at the time of the index arson. Five (12.2%) of the insane arsonists had previously been found not guilty by reason of insanity for arson or had been convicted of having committed arson. Our findings suggest that lack of participation in psychiatric treatment was the most important factor in contributing to the index arson and the most important problem to be addressed in subsequent psychiatric treatment plans.  相似文献   
123.
An impressively large number of clandestinely produced controlled-substance analogues (designer drugs) of amphetamine with high structural variety have been encountered in forensic samples in recent years. The continuous designer drug exploration and their widespread consumption results in an increasing number of reports regarding abuse and intoxication. This study presents the analytical properties of a series of new fluoro-methoxy-substituted controlled-substance analogues of amphetamine. Three ring positional isomeric fluoroamphetamines, two isomeric fluoromethoxyamphetamines, two N-alkyl 4-fluoroamphetamines, and one 4-fluorophenylbutan-2-amine were identified and differentiated by gas chromatography-mass spectrometry (GC-MS), 1H- and 13C-nuclear magnetic resonance (NMR), and gas chromatography-infrared spectroscopy (GC-IR). The regioisomeric 2-, 3-, and 4-fluoroamphetamines and the regioisomeric fluoro-methoxyamphetamines show virtually identical mass spectra so that this method is insufficient to discriminate between these closely related compounds. The mass spectra of the acetylated compounds allowed a differentiation of the 4-fluoroamphetamine from its regioisomeric 2- and 3-fluoroamphetamines. The gas chromatographic properties of the three regioisomeric fluoroamphetamines and their acetylated and trifluoroacetylated derivatives are also so similar that a complete separation of these compounds could not be achieved under GC-MS conditions. The two isomeric compounds 5-fluoro-2-methoxyamphetamine and 3-fluoro-4-methoxyamphetamine on the other hand showed significant different gas chromatographic retention times so that a separation was uncomplicated. The trifluoroacetylation of these compounds proved to be an effective method for their mass spectral differentiation. Gas chromatography-infrared spectroscopy and 1H- and 13C-nuclear magnetic resonance allowed an unequivocal differentiation of all studied regioisomeric fluoroamphetamines and fluoro-methoxyamphetamines.  相似文献   
124.
Numerous studies have found a negative relationship between the closeness of an election, the size of the electorate and voter turnout. It is often claimed that this relationship supports the rational voter hypothesis, with closeness and size proxying for the decisiveness of a vote. We offer a different interpretation. Larger communities are more heterogeneous than smaller ones, and turnouts are inversely related to the heterogeneity of a community. We present empirical support for this hypothesis using data for voter turnouts in Norwegian school language referendums. Community size is found to have a negative effect on voter turnouts, even after accounting for the probability of a single vote being decisive and the linguistic dimension of this heterogeneity. Our findings question the adequacy of the turnout regression in testing the rational voter hypothesis, as neither a positive correlation between closeness and turnout, nor a negative correlation between size and turnout can be exclusively attributed to instrumental voting.  相似文献   
125.
126.
127.
This article surveys recent research in constitutional political economy in Europe. Although not all of the works discussed necessarily focus only on European constitutional issues or are written by Europeans, European constitutional issues figure importantly in each area surveyed. The article examines the literatures linking constitutional institutions to economic growth, government size, government deficits and corruption, bicameralism, direct democracy and federalism. Three exclusively European topics also are covered: constitutional issues in the transition countries, the structure of the European Union and the draft constitution for the European Union.  相似文献   
128.
129.
The degree to which individuals are motivated to apply themselves depends in part on how far they expect to be able to achieve given goals. This study, based on interviews of local government administrators in Botswana, not only stresses the importance of expectancy in motivation but reports the importance of altruistic goals among these administrators. Among those interviewed there was a strong desire to advance their own careers, both by developing themselves in the job they currently hold, and by advancing through the organizational hierarchy. Employees, however, were also anxious to accomplish concrete objectives in their current jobs and thus to contribute to the development of the nation. Here unless officials have the expectancy of being able to achieve these goals their motivation is affected. Thus emphasis is placed in this article on the need to supplement traditional attention to pay and promotion as devices to improve motivation with a concern to remove road blocks to development. The enquiry thus strengthens the case for the performance improvement programme of the United Nations.  相似文献   
130.
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