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
1.
The optical and morphological properties of resveratrol were investigated. This nontoxic fluorescent natural material, emitting in the visible blue light, was used as an optical marker, enabling the enhancement of the image contrast coming from relief pictures marked on challenging surfaces. By applying appropriated imaging softwares, this marker was verified to be very useful in the latent fingerprint recognition deposited on different wood surface types, mainly those with high level of roughness, where conventional forensic materials do not allow effective fingerprint image visualization.  相似文献   
2.
3.
Allele frequencies, together with some parameters of forensic interest were estimated for nine STRs included in the AmpF/STR Profiler kit (CSF1PO, D3S1358, D5S818, D7S820, D13S317, FGA, TH01, TPOX and vWA) in a sample of 215 unrelated individuals from Cartagena (Colombia). For all loci, no significant deviations from Hardy-Weinberg equilibrium were observed. Comparative analysis results between our data and those from other Colombian and African population samples revealed significant differences, except with two Colombian Caribbean Coast sub-regions.  相似文献   
4.
Economical liberalization, market globalization and soy expansion stimulated the advance of big transnational companies in the Southern Cone countries (Brazil, Argentina, Paraguay and Uruguay). Currently, the main corporations acting on the last links of the productive chain are ADM (Archer Daniels Midland), Bunge, Cargill and Dreyfus (the ABCD firms), global leaders in the soy trade. The objective of this contribution is to analyze the different strategies these companies articulate in the Southern Cone, and their dynamics in local space through market relations with local producers. The results show the rapid and intense process of denationalization of the firms in the soy productive chain as well as the high level of market internationalization and company concentration. In spite of this, this study shows that all transnational power of ABCD firms, which seems so abstract and intimidating when seen in the global scale, depends on its basis of the formation, maintenance and exploration of relations of proximity, trust and reciprocity with local actors (especially rural producers), including family friendship linkages.  相似文献   
5.
6.
The Journal of Technology Transfer - The importance and the definition of an entrepreneurial university (EU), together with the factors that lead to its existence, have been widely discussed in the...  相似文献   
7.
8.
For several years, local governments have been tackling new challenges related to the regeneration of their cities within the physical sphere, as well as in their economic and social aspects. This task is developed in accordance with what has been called the Integrated Urban Development Model, understanding the integrated nature of this approach not only in terms of the spheres of public policy involved, but also in relation to their management. In this paper, this management is analysed in terms of the development of mechanisms for New Local Governance and New Public Management (NPM). Using Spanish municipalities as a case study, this paper develops an analytical tool for the analysis of this model of urban intervention within the European context, paying close attention to the development of mechanisms for New Local Governance from a multilevel perspective, as well as the development of mechanisms for NPM.  相似文献   
9.
10.
It has been suggested that Africa is experiencing a ‘NewScramble’ thanks primarily to its oil and gas wealth,with the United States and the People’s Republic of Chinaactively competing for access to Africa’s resources. Thisarticle aims to scrutinize the claim that Africa is facing aNew Scramble, analysing the nature of the economic and politicalchanges at work, the importance of Africa’s oil, and thepolitical and economic forces behind the new oil rush. The articlestarts with an overview of the phenomenon labelled by some asthe ‘New Scramble’. The main body of the articleevaluates the existence of a New Scramble from three subjectperspectives: history, international relations, and businessstudies. Finally, by analysing the likely impact on the economiesof oil-producing states, it considers whether we should dismayor rejoice over the ‘New Scramble for Africa’. Itconcludes that the existence of a New Scramble or a US–Chineserace for Africa should be treated with some caution and thatthe use of terms such as ‘scramble’ and ‘race’is perhaps misleading, while the economic impact of oil investmentsis likely to be bleak.  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