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   297篇
  免费   12篇
各国政治   17篇
工人农民   77篇
世界政治   27篇
外交国际关系   10篇
法律   122篇
中国政治   1篇
政治理论   50篇
综合类   5篇
  2021年   1篇
  2020年   6篇
  2019年   7篇
  2018年   6篇
  2017年   12篇
  2016年   13篇
  2015年   9篇
  2014年   9篇
  2013年   55篇
  2012年   10篇
  2011年   6篇
  2010年   11篇
  2009年   7篇
  2008年   8篇
  2007年   12篇
  2006年   10篇
  2005年   13篇
  2004年   10篇
  2003年   8篇
  2002年   10篇
  2001年   4篇
  2000年   4篇
  1999年   7篇
  1998年   1篇
  1997年   1篇
  1996年   1篇
  1995年   3篇
  1994年   9篇
  1993年   7篇
  1992年   4篇
  1991年   2篇
  1990年   4篇
  1989年   4篇
  1988年   5篇
  1987年   5篇
  1986年   6篇
  1985年   2篇
  1984年   3篇
  1983年   2篇
  1982年   3篇
  1981年   1篇
  1980年   2篇
  1978年   1篇
  1977年   1篇
  1976年   2篇
  1974年   1篇
  1971年   1篇
排序方式: 共有309条查询结果,搜索用时 484 毫秒
31.
32.
33.
34.
35.
This article reports on empirical tests of two theories for improving compliance with state environmental regulations. One theory argues for centralization of enforcement responsibilities with state agencies, while the other focuses on enforcement strategies, arguing for an approach that emphasizes capacity building and the social and moral bases of compliance in addition to deterrence and the threatened application of sanctions. Using evidence from North Carolina, we show that centralization does not necessarily enhance compliance, but cooperative enforcement strategies can improve the effectiveness of regulations that seek to attain performance standards. Compliance with simpler specification standards, however, can be attained just as well with easier to administer deterrent enforcement strategies based on frequent inspections and adequate sanctions.  相似文献   
36.
This paper presents a quantitative and qualitative content analysis of Twitter posts mentioning Queensland Premier Anna Bligh and Australian Prime Minister Julia Gillard during the 2011 Queensland flood crisis. The contrast in the perceived styles of the two leaders is analysed using the theory of transformational leadership as a framework. The implications for effective leadership communication in a crisis are discussed, notably, strategies for instilling pride and gaining respect and trust. The study also highlights the emerging role of Twitter in setting the media agenda at times of fast‐breaking news. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   
37.
Phenazepam is a long-acting benzodiazepine that, unlike other benzodiazepines, is currently not scheduled as a narcotic in Finland, most other European countries or the USA. It is used as an anxiolytic, sedative-hypnotic and anti-epileptic, mainly in Russia. In Finland, as well as in some other countries, an increase in the unauthorized use of phenazepam has been observed in recent years. In the one year period between July 1, 2010 and June 30, 2011 the prevalence of phenazepam in Finland was assessed among drivers apprehended for driving under the influence of drugs (DUID), in medico-legal autopsy cases and in police confiscations of illicit drugs. In DUID cases an LC-MS/MS method preceded by solid phase extraction was used for the determination of phenazepam. In the post-mortem investigations the sample preparation consisted of liquid-liquid extraction followed by derivatization and the determination was carried out by GC-MS. The police confiscations were analysed by GC-MS. There were 141 positive phenazepam cases among apprehended drivers, representing approximately 3.5% of all confirmed drug cases (n=4007) in this time period. The median (range) phenazepam blood concentration in DUID cases was 0.061 mg/L (0.004-3.600 mg/L). The median phenazepam concentration in cases with no concomitant stimulant use was significantly higher than the overall median concentration. Phenazepam was found in 17 medico-legal autopsy cases and the median (range) blood concentration was 0.048 mg/L (0.007-1.600 mg/L). Phenazepam was not considered by the medico-legal team to be the sole cause of death in any of the cases, the majority of them being accidental opiod overdoses. There were 26 seizures of phenazepam by the Police in the time period studied, some of the batches consisted of a mixture of phenazepam and stimulant designer drugs. The data show that phenazepam abuse is a widespread phenomenon in Finland. A typical user was a male multi-drug user in his 30s. The concentration range of phenazepam among apprehended drivers and medico-legal autopsy cases was wide and the drug was usually found along with other psychoactive drugs. Therefore, although it seems likely that phenazepam contributed to impairment of driving in some DUID cases, the extent of its effect remains unclear and further studies are needed to define the concentrations causing impairment and toxicity.  相似文献   
38.
Abstract

During a xenophobia and social cohesion research project conducted by the Safety and Violence Initiative (SaVI) of the University of Cape Town (UCT) and Freedom House USA, researchers found an overwhelming perception that foreign nationals were taking things that belong to South Africans. This perception was most prevalent in the male population, and antiforeigner resentment was mainly aimed toward male foreign nationals. This paper uses ethnographic research in the form of qualitative interviews from Motherwell and Makhanda in the Eastern Cape province to find out how constructions of hegemonic masculinities at the local level contribute to antiforeigner resentment.  相似文献   
39.
40.
Evidence suggests that individuals rely on external features such as hair and face shape when processing and recognising unfamiliar faces. This is problematic in a forensic setting because hairstyle can be changed easily. In two studies we examined whether training individuals to focus more on the stable, internal features of the face (e.g. eyes, nose and mouth) and hence less on the changeable external features would improve identification accuracy. In Study 1, participants were instructed to focus on: (1) internal features, (2) external features, or (3) both internal and external features. Participants’ eye movements were monitored while they studied target faces, which they later tried to identify from an array that included the target with a changed appearance. In Study 2, participants were instructed to focus on: (1) internal features, (2) external features, or (3) given no instructions. Participants were required to identify target faces from line-ups, where they were presented either unchanged or with an altered hairstyle. Results suggested that training individuals to attend to internal features of unfamiliar faces may improve identification accuracy in the common situation where external features have changed between presentation and identification. However, internal feature focus may decrease identification accuracy when external features are unchanged.  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