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   264篇
  免费   14篇
各国政治   14篇
工人农民   7篇
世界政治   56篇
外交国际关系   11篇
法律   123篇
中国共产党   2篇
中国政治   1篇
政治理论   58篇
综合类   6篇
  2023年   1篇
  2020年   1篇
  2019年   4篇
  2018年   7篇
  2017年   13篇
  2016年   8篇
  2015年   5篇
  2014年   12篇
  2013年   50篇
  2012年   8篇
  2011年   7篇
  2010年   14篇
  2009年   9篇
  2008年   9篇
  2007年   14篇
  2006年   5篇
  2005年   11篇
  2004年   11篇
  2003年   4篇
  2002年   5篇
  2001年   2篇
  2000年   6篇
  1999年   3篇
  1998年   10篇
  1997年   8篇
  1996年   5篇
  1995年   5篇
  1994年   5篇
  1993年   4篇
  1992年   6篇
  1991年   4篇
  1990年   1篇
  1989年   2篇
  1988年   3篇
  1987年   3篇
  1986年   2篇
  1984年   3篇
  1982年   1篇
  1981年   1篇
  1980年   2篇
  1977年   1篇
  1973年   1篇
  1972年   1篇
  1965年   1篇
排序方式: 共有278条查询结果,搜索用时 0 毫秒
51.
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   
52.
Abstract: The design and preliminary characterization of a novel sensor for drugs of abuse, DETECHIP®, is described in this proof‐of‐concept note. Combining both colorimetric and fluorimetric assays, DETECHIP® is suitable for lab and field use. More than a conventional spot test which provides a single “yes or no” answer, DETECHIP® provides twenty responses for a more complete characterization of suspect material. This is accomplished by visually noting colorimetric and fluorescent changes of carefully selected dyes upon the addition of test analytes, including drugs of abuse, with respect to controls. Color and fluorescence changes are recorded numerically so that a 20 digit identification code can be constructed for comparison of test analytes and known compounds. DETECHIP® is applicable to a variety of drugs, both plant‐derived and synthetic, addressing the need to use several different spot tests simultaneously for a single sample.  相似文献   
53.
Our research seeks to develop understanding of the factors explaining venture capital investment managers’ attitudes towards investment in the unique context of academic spin-outs. We provide a novel integration of both VC fund characteristics and investment managers’ human capital characteristics with a unique hand-collected dataset of 68 early stage VC investment managers in Europe. Attitudes toward academic spin-out investing are positively affected by the presence of public sector capital and by investment managers who are more intensively involved with the entrepreneur. Specific human capital in investment managers who had worked in an academic environment is more likely associated with investment in academic spin-outs. In terms of general human capital, financial experience is positively related while entrepreneurial experience is negatively associated with investment attitude towards academic spin-outs. There may be a need to facilitate the attraction of people from industry and investment banking into public VC funds in particular.  相似文献   
54.
We use the NLSY97 dataset to examine the parenting‐delinquency relationship and how it is conditioned by parents’ gender, controlling for youths’ gender. Generally, neglectful and authoritarian parenting styles were associated with the highest levels of delinquency in youths. When the sample was split by parent gender, authoritarianism held up across both groups, but permissive and neglectful parenting was only significant for fathers. Independent of parenting style, boys have higher delinquency levels than girls. The strength and magnitude of this relationship is nearly identical in separate equations for mothers and fathers. Parental attachment was not a significant protective factor against delinquency for either mothers or fathers.  相似文献   
55.
This article introduces various aspects of technology business incubators (TBIs), emphasizing their increasing role in the spatial context where they are used as platforms and drivers of regional entrepreneurial ecosystems. It outlines the key themes of the emerging role of TBIs in sustainable regional development: TBI biodiversity of ecosystems; accelerating startups in the entrepreneurial university; TBI mechanisms challenged by green technology to sustain regional development; and TBIs’ connecting role between entrepreneurship education, experiential knowledge, and regional development. It proposes an agenda for future research on the role of TBIs as bridging mechanisms and drivers of entrepreneurship and regional development.  相似文献   
56.
57.
The Alawites are often linked to the interests and fate of the al-Asad regime in Syria, yet a much broader context needs to be analysed to gain any meaningful impression of this community's politics. This article suggests that pluralism and diversity lie at the core of Alawite political preferences and what's more, according to Alawite perspectives, this is what God intended. Between 1832 and 1973 Alawites made gradual progress towards genuine integration into Syrian society, however, the confluence of two factors marked a turning point in this process: the mobilisation of Alawite ‘asabiyya by the al-Asad regime and a renewed perception of Sunni Muslim intolerance. Thereafter a different trajectory was set towards the current crisis in Syria. The final analysis suggests that the longstanding political aspirations of Alawites are not dissimilar to those demanded in anti- regime protests that began in Syria in early 2011.  相似文献   
58.
This article addresses the still unsettled question of the incidence of violent election periods in Africa. It uses two new datasets, which report episodes of social conflict in the region for 1990–2011, and elections worldwide from 1960 to 2010. When combined, these data suggest that onsets of electoral violence peak around major election days in Africa as a whole, but with wide national variability in the volume of new episodes. Depending on the time span and type of social conflict, from one-quarter to three-quarters of the elections for national leadership have been without incident. The article also investigates the timing of electoral violence and the extent to which there is an experience curve effect, whereby subsequent elections have fewer onsets of social conflict. The data indicate that two-thirds to three-quarters of elections are free of onsets of social conflict, but that the proportion does not change much with experience. Overall, there appear to be reasonable grounds for optimism about peaceful elections in many African countries.  相似文献   
59.
Editors' Note     
Examining the relationship between regime type and defense effort provides evidence for reformulating theories of democratic peace. Consistent with liberal theories, regime type has substantively and statistically significant effects. In times of peace, democracies bear lower defense burdens than other states and keep proportionately fewer soldiers under arms. During times of war, however, democracies try harder and exert greater defense effort than non-democracies. Contrary to the results of some recent studies, all other things being equal, the arsenal of democracy appears to out-gun its opponents when it counts. Examining three components of democracy separately indicates that a largely overlooked factor, political competition, tends to drive these outcomes. Executive constraints are also associated with increased defense effort during war. But there is little evidence that wide participation or large winning coalitions have the predicted effects on defense effort. The results point to the flexible quality of defense effort in democracies, which is theoretically and empirically accounted for by the competitive political environment rather than institutional factors favored by existing theories.  相似文献   
60.
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