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   1880篇
  免费   98篇
各国政治   158篇
工人农民   112篇
世界政治   282篇
外交国际关系   136篇
法律   929篇
中国共产党   1篇
中国政治   6篇
政治理论   351篇
综合类   3篇
  2023年   24篇
  2022年   13篇
  2021年   39篇
  2020年   68篇
  2019年   74篇
  2018年   110篇
  2017年   111篇
  2016年   96篇
  2015年   60篇
  2014年   95篇
  2013年   352篇
  2012年   75篇
  2011年   73篇
  2010年   43篇
  2009年   45篇
  2008年   55篇
  2007年   58篇
  2006年   48篇
  2005年   51篇
  2004年   52篇
  2003年   49篇
  2002年   45篇
  2001年   40篇
  2000年   38篇
  1999年   19篇
  1998年   19篇
  1997年   12篇
  1996年   11篇
  1995年   9篇
  1994年   23篇
  1993年   12篇
  1992年   11篇
  1991年   8篇
  1990年   11篇
  1989年   10篇
  1988年   7篇
  1987年   12篇
  1985年   5篇
  1984年   5篇
  1982年   9篇
  1980年   6篇
  1979年   11篇
  1978年   7篇
  1977年   4篇
  1973年   9篇
  1972年   3篇
  1971年   8篇
  1967年   4篇
  1965年   4篇
  1963年   3篇
排序方式: 共有1978条查询结果,搜索用时 31 毫秒
81.
The Democratic Alliance of Hungarians in Romania (RMDSZ) has been the most stable actor in the Romanian party system over the past two decades. However, in this article, we argue that beyond this apparent stability, the linkages between RMDSZ and its voters have undergone a gradual, yet significant shift. The ethnic block voting of Transylvanian Hungarians was closely connected to the concept of a self-standing and parallel “Minority Society,” and to the practices of institution building that the minority elites engaged in in the early 1990s. However, since its first participation in the Romanian government in 1996, RMDSZ has gradually departed from this strategy, a phenomenon that was also closely connected to a process of elite change within the organization. The present RMDSZ leadership puts less and less emphasis on policy programs that could reinforce the institutional system of the minority; consequently, it is unable (and unwilling) to organizationally integrate the community activists of the minority society who previously had played a key role in the process of (electoral) mobilization. At the rhetorical level, RMDSZ did not abandon the goal of building a parallel Hungarian minority society, but in its linkages to the Hungarian electorate, clientelistic exchanges have become predominant.  相似文献   
82.
Food production has been changing significantly in recent years as a result of climate change and of growing demand for food. This article aims to understand the link between food security and international security in the context of climate change, applying a systematic and qualitative analysis of the literature using the bibliometric method. This research observes that climate change tends to affect agricultural productivity, exposing societies to risk and the need for migration. However, good governance, together with international cooperation, can reduce the hazards of food insecurity, strengthening ties between countries and stimulating a fairer and more inclusive form of international trade.  相似文献   
83.
84.
DNA is one of the fastest growing tools in forensic sciences, increasing reliability in forensic reports and judgments. The use of DNA has increased in different areas of the forensic sciences, such as investigation of plant species, where plastid DNA has been used to elucidate and generate evidence in cases of traceability of genetically modified and controlled plants. Even with several advances and the practice of using DNA in forensic investigations, there are just few studies related to the identification of genetic tools for the characterization of drug and nondrug-types of Cannabis. Herein, the whole plastomes of two drug-type Cannabis are presented and have their structures compared with other Cannabis plastomes deposited in the GenBank, focusing in the forensic use of plastome sequences. The plastomes of Cannabis sativa “Brazuka” and of the hybrid Cannabis AK Royal Automatic presented general structure that does not differs from the reported for other C. sativa cultivars. A phylogenomic analyses grouped C. sativa “Brazuka” with the nondrug C. sativa cultivars, while the hybrid Cannabis AK Royal Automatic placed isolated, basal to this group. This suggests that the analysis of plastomes is useful toward genetic identification of hybrids in relation to C. sativa.  相似文献   
85.
This article argues that Donald Trump’s Asian strategy hardly marks a radical transformation from Barack Obama’s ‘pivot to Asia’. This is because the ‘pivot to Asia’ never really existed. Although Obama was successful in building legitimacy for the strategy through international norms, he failed to translate his lofty rhetoric into practice. Much of his original pivot components (building a constructive relationship with China, coordinating with Asian allies and multilateralism in the Association of South East Asian Nations and the Trans-Pacific Partnership) has either failed or did not live up to expectations. Donald Trump was adamant that the Asian pivot was a bad strategy and that he would not follow it. But although he completely discarded Obama’s legitimization of the rebalance (as Trump speaks pragmatically and does not care about international norms), in actuality he has followed many of Obama’s policies, and even improved on some of them. That being said, Trump’s ‘pivot actions’ appear to be erratic, pragmatic short-term actions rather than a meticulously planned long-term strategy similar to Obama’s rebalance (which did not materialize). Thus, while Obama failed to transform the pivot into an effective strategy, neither is Trump’s effectiveness backed by a coherent Asian strategy.  相似文献   
86.
Journal of Youth and Adolescence - Chronotype, or morningness/eveningness, has been associated with adjustment in both children and adolescents. Specifically, eveningness has been linked to...  相似文献   
87.
88.
This paper assesses the contribution of livestock to reducing rural poverty and examines the determinants of livestock assets with panel data from Vietnam. The findings show that livestock production contributes to reducing poverty and livestock assets are influenced by the number of shocks that households faced during the last three years, access to credits, farmland size, education of household head, irrigation system, and access to the national electricity. We suggest that empowering rural households to better cope with shocks contributes to developing livestock and consequently to reducing rural poverty.  相似文献   
89.
In recent years, Spanish local governments have come under increasing pressure to accommodate severe economic restrictions while maintaining their provision of local public services. We analyse overall cost efficiency in Spanish local governments during the period of the economic crisis (2008–2013), under four different non-parametric methodologies. Moreover, given how problematic it is to precisely define what municipalities do, we compare three different output models with various measures of quantity as well as quality. Results suggest that Spanish local government efficiency improved over the period 2008–2013 since budget expenditures (inputs) fell while local public services and facilities (outputs) were maintained. We also find evidence of the possible implications of service quality when measuring municipalities’ efficiency, and of structural differences in the average efficiency between municipalities located in different Spanish regions. Finally, our results confirm that the level and variation of efficiency scores are affected by the approach taken.  相似文献   
90.
In Europe, it is relatively uncommon to find studies that investigate the criminal profiles of violent offenders, especially infrequent are those that pay special attention to offenders’ mental health/substance use disorders and histories of violence during childhood. The current research explores whether inmates who are incarcerated for violent offenses (n = 536) in Spain are different in terms of the aforementioned factors as compared to inmates incarcerated for non-violent offenses (n = 536). Multivariate logistic regression analysis revealed that violent offenders, as compared to their non-violent counterparts, were more likely to be younger, younger at the time of their first arrest, single, use alcohol, receive treatment in prison for anxiety or schizophrenia, and report physical abuse during childhood.  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