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   329篇
  免费   18篇
各国政治   33篇
工人农民   15篇
世界政治   27篇
外交国际关系   16篇
法律   212篇
中国政治   2篇
政治理论   41篇
综合类   1篇
  2023年   4篇
  2022年   3篇
  2021年   8篇
  2020年   13篇
  2019年   10篇
  2018年   14篇
  2017年   22篇
  2016年   19篇
  2015年   10篇
  2014年   20篇
  2013年   38篇
  2012年   19篇
  2011年   9篇
  2010年   7篇
  2009年   18篇
  2008年   11篇
  2007年   15篇
  2006年   15篇
  2005年   12篇
  2004年   13篇
  2003年   16篇
  2002年   13篇
  2001年   9篇
  2000年   4篇
  1999年   4篇
  1998年   1篇
  1997年   1篇
  1993年   1篇
  1984年   1篇
  1983年   1篇
  1981年   2篇
  1980年   3篇
  1979年   4篇
  1977年   2篇
  1974年   4篇
  1972年   1篇
排序方式: 共有347条查询结果,搜索用时 15 毫秒
271.
Ecstasy is the name given to a large group of substances known as “club drugs” traded in the form of tablets, powder and liquid that present a varied composition, including mainly 3,4-methylenedioxymethamphetamine (MDMA) and analogous substances, in addition to the growing presence of new psychoactive substances. Based on this, clandestinely produced tablets (“ecstasy tablets”) seized by police in Santa Catarina in the period from 2011 to 2017 were analyzed. During the study period, 3472 seizures occurred, which resulted in total 498,443 tablets seized. Seventy nine substances were identified. In the year 2011, about 90% of the tablets contained MDMA. This number decreased to 66.6% in 2017. On the other hand, there was an increase in the number of tablets that mainly contained synthetic cathinones, as well as tryptamine and piperazine derivatives. Police seizures in the metropolitan region of Florianópolis and on the coast prevailed over the rest of the state.  相似文献   
272.
The concentrations of lead (Pb), barium (Ba), and antimony (Sb), characteristic of GSR, were determined in soil sediments and immature (larvae) of cadaveric flies of the family Calliphoridae, by inductively coupled plasma mass spectrometry (ICP-MS). This research refers to a case study from two real crime scenes in which the corpses were in an advanced state of decomposition. In case 1, the victim had holes similar to gunshot wounds, and in case 2, there was no evidence of perforations in the corpse. Soil sediment collection was performed at three different points of the terrain, at a minimum distance of 10 m from the corpse, for cases 1 and 2. In relation to the collection of immatures, larvae were collected in regions of the mouth, nose, and orifices similar to the entry of firearms projectile into the body, for case 1, and collection of larvae and pupae, located on the body and underneath it, for case 2. It was possible to detect and quantify the three elements of interest (Pb, Ba, and Sb) by ICP-MS in both sediment and cadaveric larvae. Concentrations of 4.44, 8.74, and 0.08 μg/g were obtained for Pb, Ba, and Sb, respectively, in the soil for case 1. For the case 2, the concentrations in Pb, Ba, and Sb were from 16.34 to 26.02 μg/g; from 32.64 to 57.97 μg/g and from 0.042 to 0.30 μg/g, respectively. In the larvae, Pb, Ba, and Sb were quantified in cases 1 and 2 with a concentration of 6.28 and 1.78 μg/g for Pb, 1.49 and 2.94 μg/g for Ba, 0.50 μg/g and <LD for Sb, respectively. These new results present the detection of characteristic elements of GSR in cadaveric larvae in humans in a real crime scene, besides highlighting the importance of the study of immature flies, using the ICP-MS technique in forensic analysis.  相似文献   
273.
"The World Conferences on Research Integrity (WCRIs), six to date, were initiated at a time when researchers in various countries were at quite different stages in their thinking about research integrity. Over the course of the past decade, the global conferences have reflected and documented significant changes in the way research integrity is viewed and supported" [1].  相似文献   
274.
This article uses the concept of entrepreneurial powers to discuss how and under what circumstances Brazil successfully accomplishes its goals in international crises. The concept of entrepreneurial power focuses on systematic evidence of middle‐power behavior and its relation to foreign policy tools. Brazil resorts to three agency‐based foreign policy tools that are the substance of its entrepreneurial power. These instruments are always mediated by a structural condition, the dominant power pivotal position in the crisis. This study applies qualitative comparative analysis methodology to 32 international crises since the early 1990s in which Brazil played a role. It finds that for regional crises, the use of only one agency‐based tool is sufficient for success, regardless of the dominant power position; and for global crises, the use of only one agency‐based tool is a necessary and sufficient condition for Brazil to accomplish its goals, despite the dominant power position on the issue.  相似文献   
275.
ABSTRACT

Brazil and Argentina are hosts to two of the largest populations of Syrian descent in Latin America. While Syrian immigrants and their descendants have usually defined their identities based on broad Arab nationalistic references, creating and affiliating themselves to Syrian-Lebanese and/or Arab institutions, the ongoing civil war in Syria has triggered an unprecedented mobilization around specifically Syrian issues. Most diasporic organizations have shown an unconditional support for the Ba?thist regime. This article aims at understanding the political mobilization of the Syrian diaspora in Argentina and Brazil, as well as unveiling how Bashar al-Asad's government has tried to build on their support.  相似文献   
276.
On 30 March 2014 Turkish voters elected their local (city) councillors. Their party preferences seem to indicate considerable correspondence with the national vote choices. So, do voters' choices in local elections differ from voters' party preferences at the national legislative elections? Based on previous research findings on Turkish voting behaviour, a list of hypotheses was compiled and tested, using binary logistic regression analyses and survey data collected immediately prior to the 2009 and 2014 local elections. The main findings are that the party lists are supported at the ballot boxes on the basis of the voters' party identification, ideological positions, and economic (dis)satisfaction, whether in national or local elections.  相似文献   
277.
Due to its important practical implications, there has been a growing number of studies on framing conducted by scholars from various research domains. There has been, however, no paper that would provide a comprehensive overview of various moderators and mediators of the effect. The aim of this paper is to address this research gap, concentrating on psychological moderators and mediators of framing characteristic for political marketing. The paper consists of three parts. In the first part, the concepts of framing, priming and agenda-setting as well as the similarities and differences between them are presented in order to resolve common terminological inconsistencies. In the second, we discuss the moderating role of such variables as knowledge, trust in media and values on framing effect. In the third section, psychological mechanisms that underlie framing and priming are reviewed. Here, cognitive mediators such as accessibility and applicability effects are presented, followed by the discussion of the moderating and mediating role of emotions in framing effects, with special attention given to positive-negative asymmetry observed in the evaluation of political candidates and events. Finally, implication for political brand management are discussed. Our findings can be relevant for politicians, specialists dealing in political brand image and scholars studying framing effects.  相似文献   
278.
Abstract

The 2019 Portuguese general elections have led to the formation of another minority government of the Socialist Party. Right-wing parties suffered a resounding defeat. The election had two key consequences. First, after four years of contract parliamentarism with an extreme-left party, the Socialists returned to their historical position of pivotal party in the system. Socialist leader Costa refused to replicate alliances with parties to his left. Second, the 2019 election witnessed the emergence of three new parties, Chega, Iniciativa Liberal and Livre. The election of Chega marks a watershed moment in Portuguese democratic history, as for the first time an extreme-right populist party has gained representation in the country.  相似文献   
279.
280.
ABSTRACT

Recent scientific research has advanced the measurement of the relative performance of organizations and the efficiency of public spending, based on analyzes of the services offered and results achieved. However, from the methodological point of view, there are several methods to analyze the performance and efficiency of spending in the private and public sectors. In this sense, the present study performs a systematic bibliometric review to analyze all scientific publications on the efficiency of public spending published in the last 20 years. The results show that most cost-efficiency analyzes have been limited to education and health expenditures and have used quantitative analysis, mainly through the application of data-involution analysis. The present review is a first step in mapping scientific publications on efficiency in public spending, which will support researchers and managers to make public spending more efficient.  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