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   258篇
  免费   11篇
各国政治   9篇
工人农民   7篇
世界政治   38篇
外交国际关系   16篇
法律   101篇
政治理论   95篇
综合类   3篇
  2023年   2篇
  2020年   7篇
  2019年   11篇
  2018年   11篇
  2017年   8篇
  2016年   10篇
  2015年   5篇
  2014年   9篇
  2013年   51篇
  2012年   7篇
  2011年   5篇
  2010年   6篇
  2009年   9篇
  2008年   11篇
  2007年   6篇
  2006年   11篇
  2005年   10篇
  2004年   5篇
  2003年   6篇
  2002年   8篇
  2001年   9篇
  2000年   9篇
  1999年   4篇
  1998年   2篇
  1997年   5篇
  1996年   2篇
  1995年   1篇
  1994年   3篇
  1993年   1篇
  1992年   1篇
  1991年   4篇
  1990年   1篇
  1989年   2篇
  1988年   1篇
  1987年   3篇
  1986年   1篇
  1985年   1篇
  1984年   1篇
  1981年   1篇
  1980年   2篇
  1973年   1篇
  1970年   1篇
  1969年   2篇
  1968年   1篇
  1967年   3篇
  1966年   1篇
  1964年   2篇
  1963年   1篇
  1962年   1篇
  1961年   2篇
排序方式: 共有269条查询结果,搜索用时 26 毫秒
261.
As part of the project Impaired Motorists, Methods of Roadside Testing and Assessment for Licensing (IMMORTAL) under the European Commission's Transport RTD Programme of the 5th Framework Programme [I.M. Bernhoft, Drugs in accidents involved drivers in Denmark, D-R4.3 of the project Impaired Motorists, Methods Of Roadside Testing and Assessment for Licensing (IMMORTAL), www.immortal.or.at, 2005], a study regarding drugs in accident-involved drivers was carried out in Denmark. The main objectives of this study were: (1) to collect and analyse samples from injured drivers for the presence of drugs; (2) to give an indication whether drugs may have contributed to traffic accidents; and (3) to get information on the drug-positive drivers and their drug use. This paper focuses on objective 1. Injured drivers who were treated in hospital were asked to give a saliva sample, a blood sample or both. The samples were screened for the following substances: opiates, amphetamines, methamphetamines, incl. MDMA (ecstasy), cannabinoids and metabolites, cocaine and metabolites and benzodiazepines. Screenings were carried out by means of Cozart Microplate EIA kit. Positive screenings were confirmation analysed by gas chromatography–mass spectrometry (GC–MS) or liquid chromatography/tandem mass spectrometry (LC/MS/MS). In total, 26 out of 330 patients were confirmed positive for one or more of the six drug groups. However, three patients were excluded from the survey for various reasons. Of the remaining 23 drug-positive patients 15 were found positive for one drug group, and in five of these cases alcohol was present in a concentration over the legal limit in Denmark (0.05%). The other eight patients were found positive for two drug groups, and in four of these cases, alcohol was also present in a concentration over the legal limit. Alcohol was found both in combinations with medicinal drugs, with illegal drugs and with both. Based on the saliva or blood concentrations, we estimate that there is a strong suspicion of impairment in 9 out of 23 cases, and in another six cases it was likely that the drivers were impaired.  相似文献   
262.
This brief essay outlines the progression over the last 20 years of ecological theories of interpersonal violence. The period between the present and the early 1980s began with a revival of cultural explanations of violence that paralleled the introduction of the neo-conservative social science and then witnessed a rediscovery of deficits based structural explanations of interpersonal violence under the broad rubric of social disorganization theory. The essay concludes with a more optimistic appraisal of recent refinements of social disorganization theory that consider the mediating effects of collective efficacy on urban crime and interpersonal violence.  相似文献   
263.
The manner and cause of death in a forensic series of chronic alcoholics.   总被引:1,自引:0,他引:1  
Chronic alcoholics account for an increasing number of the cases which are examined in forensic pathology. The manner and cause of death in 122 chronic alcoholics is described and compared with a previous investigation and to a group of non-alcoholics. The percentage of cases in which the manner of death is undetermined is twice as high as in the control group, whilst the percentage of suicide, surprisingly enough is only half that of the control group. The patho-anatomic findings in the liver and the causes of death are discussed in detail.  相似文献   
264.
This paper evaluates a recently developed method for extracting policy positions from political texts, known as Wordscores. This computerized content analysis technique is a potentially powerful tool for scholars interested in the study of political elites, since it promises an easy and efficient way of inferring policy position from texts and speeches. In this article, we provide a systematic evaluation of this promising method. Using Danish manifestos and government speeches from 1945 to 2005, we compare the policy positions extracted using Wordscores with measures of positions from the well-known Comparative Manifesto Project and cross-validate these with party expert surveys. Our analysis shows that the word scoring technique arrives at largely similar estimates to independently derived position measures and produces time series of government positions with high face validity.  相似文献   
265.
266.
Is there a relationship between party leader gender and voters' assessments? The answer is ‘yes’ according to theses on gender identity and stereotyping. A voter survey during the 2011 Danish general election allows for a comprehensive analysis of a less likely case with four male and four female party leaders. Female party leaders are assessed more positively by female voters than male voters both in regard to general party leader sympathy and assessment of specific characteristics, whereas it is not the case that male party leaders are assessed more positively by male voters than female voters. The impact of gender does not increase with age; in fact, the opposite is the case among men since younger male voters have less sympathy for female party leaders. Furthermore, there is no support for the expectation that voters with more education or with higher levels of political interest and knowledge are more positive towards party leaders of their own gender than voters with less education. Also, the relationship between gender and voter assessment is not stronger prior to an election campaign than immediately after an election. Hence, in sum, gender identity does not seem to require a higher level of political sophistication, nor does it decrease with higher levels of information.  相似文献   
267.
The private car comes with promises of modernity and comfortable mobility for the growing middle class in Vietnam. Vietnam’s government has also targeted the domestic automobile industry as a “spearhead industry” in an attempt to achieve industrial upgrading. Paradoxically, the government is simultaneously restraining the market for this industry through imposing high taxes and fees on cars, making them available only to a limited number of people. This article discusses the promises and problems of the automobile in Vietnam. It analyses policies related to the development of the automobile industry, and discusses the reasons for the relative failure of the project. The article argues that the failure is linked to weaknesses in Vietnamese development strategies, but also to the potential problems an expansion in car ownership in Vietnam would lead to. The article contends that the car represents a development dilemma between industrialisation and urban mobility, and that environmental, energy and social concerns add to the rationale for limiting car ownership. Furthermore, although forces promoting car-driven industrialisation appear to be gaining ground, the requirements for regional economic integration may challenge the future of the infant automobile industry.  相似文献   
268.
A significant part of the general public’s observations and image concerning the police comes through the mass media. It has been assumed that one factor affecting the level of trust is the way the media handles the police. This article describes the media uproar that arose in Finland in November 2013 about police misconduct, and its effects on the public trust in the police. Two hypotheses were tested in the study: (a) negative publicity always decreases trust, and so, too, in this case; and (b) a change in trust is affected by the public’s independent interpretation of the publicity battle, in which case criticism might also increase trust. The study materials comprise the news coverage concerning the uproar and four opinion surveys collected after it occurred. The first survey was conducted immediately after the press conference of the case in week 48/2013 and the other ones in three-week intervals. The results show that following the uproar, compared to the earlier results of the European Social Survey, trust in the police did not decrease—on the contrary, it increased slightly. Our results suggest that in this case a large part of the audience has taken, to use the term of Stuart Hall, the oppositional position when interpreting negative news about the police.  相似文献   
269.
The last of the Danish Viking Kings, Sven Estridsen, died in a.d. 1074 and is entombed in Roskilde Cathedral with other Danish kings and queens. Sven's mother, Estrid, is entombed in a pillar across the chancel. However, while there is no reasonable doubt about the identity of Sven, there have been doubts among historians whether the woman entombed was indeed Estrid. To shed light on this problem, we have extracted and analysed mitochondrial DNA (mtDNA) from pulp of teeth from each of the two royals. Four overlapping DNA-fragments covering about 400bp of hypervariable region 1 (HVR-1) of the D-loop were PCR amplified, cloned and a number of clones with each segment were sequenced. Also a segment containing the H/non-H specific nucleotide 7028 was sequenced. Consensus sequences were determined and D-loop results were replicated in an independent laboratory. This allowed the assignment of King Sven Estridsen to haplogroup H; Estrid's sequence differed from that of Sven at two positions in HVR-1, 16093T-->C and 16304T-->C, indicating that she belongs to subgroup H5a. Given the maternal inheritance of mtDNA, offspring will have the same mtDNA sequence as their mother with the exception of rare cases where the sequence has been altered by a germ line mutation. Therefore, the observation of two sequence differences makes it highly unlikely that the entombed woman was the mother of Sven. In addition, physical examination of the skeleton and the teeth strongly indicated that this woman was much younger (approximately 35 years) at the time of death than the 70 years history records tell. Although the entombed woman cannot be the Estrid, she may well be one of Sven's two daughters-in-law who were also called Estrid and who both became queens.  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