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   1568篇
  免费   61篇
各国政治   116篇
工人农民   97篇
世界政治   162篇
外交国际关系   83篇
法律   712篇
中国政治   9篇
政治理论   431篇
综合类   19篇
  2023年   15篇
  2021年   10篇
  2020年   22篇
  2019年   31篇
  2018年   43篇
  2017年   49篇
  2016年   67篇
  2015年   29篇
  2014年   54篇
  2013年   239篇
  2012年   50篇
  2011年   47篇
  2010年   30篇
  2009年   52篇
  2008年   52篇
  2007年   51篇
  2006年   28篇
  2005年   40篇
  2004年   53篇
  2003年   42篇
  2002年   43篇
  2001年   55篇
  2000年   61篇
  1999年   34篇
  1998年   25篇
  1997年   22篇
  1996年   17篇
  1995年   12篇
  1994年   20篇
  1993年   15篇
  1992年   20篇
  1991年   32篇
  1990年   29篇
  1989年   20篇
  1988年   20篇
  1987年   19篇
  1986年   14篇
  1985年   18篇
  1984年   16篇
  1983年   15篇
  1982年   13篇
  1981年   6篇
  1980年   8篇
  1979年   16篇
  1978年   6篇
  1976年   9篇
  1975年   6篇
  1974年   6篇
  1973年   9篇
  1972年   8篇
排序方式: 共有1629条查询结果,搜索用时 15 毫秒
991.
Substance misuse among criminally delinquent youth has typically been described as a concurrent part of their participation in risky and delinquent behavior. Using Khantzian’s self-medication hypothesis, this article presents an alternative view by presenting qualitative data which suggests that substance misuse for female juvenile offenders may serve as self-medication for mental health problems stemming from early trauma, often at the hands of their families. Based on the narratives of 30 female juvenile offenders, this article examines the lived experiences of girls with childhood trauma and substance misuse, followed by arrest and incarceration. The paper concludes with recommendations for juvenile justice and child welfare practitioners.  相似文献   
992.
993.
994.
Abstract

While debates continue about China’s role in sub-Saharan Africa, there is growing consensus that China is a different kind of development partner. One distinct feature of Chinese partnerships is that they include support for the tobacco industry, a sector other donor states and institutions shun. Not only is tobacco a primary agricultural export in a number of Africa states, the state-owned Chinese National Tobacco Corporation is the largest tobacco company in the world. This paper analyses Chinese support for the tobacco industry in three states – Zimbabwe, Malawi and Zambia – documenting how co-operation is shaped by Chinese state capitalism and assessing the development and governance implications. Following an introduction situating the analysis within the context of China–Africa co-operation and tobacco’s global value chain, Chinese engagement in each country is analysed. Findings indicate that, despite differences across case studies in terms of development outcomes, common governance implications are apparent. African elites initiated tobacco-related co-operation to meet their interests, but Chinese interests dominated implementation. Consequently, Chinese investments have maintained hierarchal governance of an exploitive and harmful industry. Analyses of Chinese African co-operation need to move beyond public–private paradigms and interrogate the nuances of Chinese state capitalism in Africa.  相似文献   
995.
Shughart II  William F.  Smith  Josh T. 《Public Choice》2020,185(3-4):315-333
Public Choice - A theoretically grounded approach to causal questions illuminates both the utility and limitations of the potential outcomes (PO) framework as a model for historically-focused,...  相似文献   
996.
997.
Definitive identification of fentanyl analogs based on mass spectral comparison is challenging given the high degree of structural and, hence, spectral similarity. To address this, a statistical method was previously developed in which two electron-ionization (EI) mass spectra are compared using the unequal variance t-test. Normalized intensities of corresponding ions are compared, testing the null hypothesis (H0) that the difference in intensity is equal to zero. If H0 is accepted at all m/z values, the two spectra are statistically equivalent at the specified confidence level. If H0 is not accepted at any m/z value, then there is a significant difference in intensity at that m/z value between the two spectra. In this work, the statistical comparison method is applied to distinguish EI spectra of valeryl fentanyl, isovaleryl fentanyl, and pivaloyl fentanyl. Spectra of the three analogs were collected over a 9-month period and at different concentrations. At the 99.9% confidence level, the spectra of corresponding isomers were statistically associated. Spectra of different isomers were statistically distinct, and ions responsible for discrimination were identified in each comparison. To account for inherent instrument variations, discriminating ions for each pairwise comparison were ranked based on the magnitude of the calculated t-statistic (tcalc) value. For a given comparison, ions with higher tcalc values are those with the greatest difference in intensity between the two spectra and, therefore, are considered more reliable for discrimination. Using these methods, objective discrimination among the spectra was achieved and ions considered most reliable for discrimination of these isomers were identified.  相似文献   
998.
999.
How does civic education affect the development of democratic political culture in new democracies? Using a unique three‐wave panel data set from Kenya spanning the transitional democratic election of 2002, we posit a two‐step process of the social transmission of democratic knowledge, norms, and values. Civic education first affected the knowledge, values, and participatory inclinations of individuals directly exposed to the Kenyan National Civic Education Programme (NCEP). These individuals became opinion leaders, communicating these new orientations to others within their social networks. Individuals who discussed others’ civic education experiences then showed significant growth in democratic knowledge and values, in many instances more than individuals with direct exposure to the program. We find further evidence of a “compensation effect,” such that the impact of civic education and post‐civic education discussion was greater among Kenyans with less education and with lower levels of social integration.  相似文献   
1000.
Housing in Asia     
Housing as a Basic Need. By Regional Institute of Higher Education and Development. Hong Kong: Maruzen Asia, 1982. Pp.253. ISBN 962 220 111 3.

A Place to Live: More Effective Low‐Cost Housing in Asia. Edited by Yue‐man Yeung. Ottawa: International Development Research Centre, 1983. Pp.216. ISBN 0 88936 371 4.

People, Poverty and Shelter: Problems of Self‐Help Housing in the Third World. Edited by R. J. Skinner and M. J. Rodell. London: Methuen, 1983. Pp.xi + 195. £6.50. ISBN 0 416 30960 7.

Management of Sites and Services Housing Schemes: The Asian Experience. By P. J. Swan, E.A. Wegelin and Komol Panchee. Chichester: Wiley, 1983. Pp.xi + 150. £10.50. ISBN 0 471 90072 9.  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