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   3528篇
  免费   96篇
各国政治   252篇
工人农民   134篇
世界政治   319篇
外交国际关系   196篇
法律   1493篇
中国政治   15篇
政治理论   1173篇
综合类   42篇
  2021年   13篇
  2020年   48篇
  2019年   50篇
  2018年   69篇
  2017年   76篇
  2016年   101篇
  2015年   59篇
  2014年   80篇
  2013年   589篇
  2012年   73篇
  2011年   97篇
  2010年   92篇
  2009年   90篇
  2008年   107篇
  2007年   116篇
  2006年   99篇
  2005年   97篇
  2004年   102篇
  2003年   109篇
  2002年   154篇
  2001年   81篇
  2000年   78篇
  1999年   84篇
  1998年   64篇
  1997年   78篇
  1996年   57篇
  1995年   46篇
  1994年   39篇
  1993年   49篇
  1992年   54篇
  1991年   59篇
  1990年   42篇
  1989年   54篇
  1988年   44篇
  1987年   43篇
  1986年   55篇
  1985年   47篇
  1984年   30篇
  1983年   55篇
  1982年   43篇
  1981年   32篇
  1980年   28篇
  1979年   25篇
  1978年   24篇
  1977年   22篇
  1976年   26篇
  1975年   19篇
  1974年   28篇
  1972年   13篇
  1971年   14篇
排序方式: 共有3624条查询结果,搜索用时 0 毫秒
941.
Much of the existing research on the prevalence and consequences of peer victimization focuses on “bullying” at school, often omitting from consideration non-bullying types of peer victimization as well as events that occur outside of school. The purpose of this study was to examine past-year exposure to peer-perpetrated victimization, occurring both within and outside of school contexts, among school-aged children in the United States. The study is based on a representative sample of 2,999 youth ages 6–17 (50% female; 45% non-white) from the 2008 National Survey of Children’s Exposure to Violence (NatSCEV). Findings revealed age, gender, race, and family structure variations in many forms of peer victimization and demonstrated significant independent and cumulative effects of six different types of peer victimization (physical assault, physical intimidation, emotional victimization, sexual victimization, property crime, and internet harassment) on trauma symptoms. Findings also showed that, although victimization at school is substantial, a considerable proportion of peer victimizations occur away from school contexts. The findings highlight the importance of comprehensive measurement of multiple forms of peer victimization that occur both at school and elsewhere, rather than focusing exclusively on traditional measures of school-focused bullying.  相似文献   
942.
Prevalence differences in depressive symptoms between the sexes typically emerge in adolescence, with symptoms more prevalent among girls. Some evidence suggests that variation in onset and progression of puberty might contribute to these differences. This study used a genetically informative, longitudinal (assessed at ages 12, 14, and 17) sample of Finnish adolescent twins (N = 1214, 51.6% female) to test whether etiological influences on depressive symptoms differ as a function of pubertal status. These tests were conducted separately by sex, and explored longitudinal relationships. Results indicated that pubertal development moderates environmental influences on depressive symptoms. These factors are more important on age 14 depressive symptoms among more developed girls relative to their less developed peers, but decrease in influence on age 17 depressive symptoms. The same effects are observed in boys, but are delayed, paralleling the delay in pubertal development in boys compared to girls. Thus, the importance of environmental influences on depressive symptoms during adolescence changes as a function of pubertal development, and the timing of this effect differs across the sexes.  相似文献   
943.
Data are presented from a pilot study that tested the initial effectiveness of the Dialectical Psychoeducational Workshop (DPEW) in reducing the potential risk for intimate partner violence (IPV). A randomized controlled trial (RCT) of an experimental intervention (DPEW), and a control condition, the first session of an eight-week anger management program (AMW), was employed. Differences between experimental and control groups were analyzed by chi-square and t tests. Self-report questionnaires were administered pre- and post-test to 55 study participants. The questionnaire was comprised of standardized measures and highly-structured questions. Quantitative analyses provided strong preliminary support for the DPEW’s effectiveness in lowering a participant’s desire to express anger physically, while decreasing the potential risk for physical violence. This pilot study demonstrated promising initial support for the DPEW as an alternative, preventative intervention for males at risk for intimate partner violence. Its strong preliminary results provide evidence for a larger RCT. The study’s results are limited by a reliance on self-report measures, the brevity of the intervention, and a small sample size.  相似文献   
944.
945.
946.
947.
948.
Economic voting has been little studied in the nations of Southern Europe. Here we examine economic voting in the Southern European countries of Portugal, Italy, Spain, and Greece – the PIGS. Through the analysis of a large, ten European nation survey pool, we establish that economic voting exists in the PIGS, with a strength that significantly exceeds that in non-PIGS of Northern Europe. The explanation for such a difference, we suggest, lies in the generally less complex governing coalitions and the poorer economic performance that characterize these Southern European nations. This relatively greater strength of the economic vote in the PIGS implies their electorates will hold government tightly accountable for management of the ongoing economic crises they face.  相似文献   
949.
Wales provides a notable exception to the contemporary academic consensus that electoral behaviour is best studied via choice-based approaches. In Wales, the orthodoxy remains that of the Three-Wales Model, an approach formulated in the 1980s which saw voting behaviour as defined by class, language and national identity. This article submits the Three-Wales Model to detailed scrutiny for the first time. The model is argued to have been constructed on a very narrow theoretical basis, and on flawed measurements. Most importantly, however, the Three-Wales Model is shown to have little empirical leverage on voting behaviour in Wales – either for the period when it was formulated or for more recent elections. Factors associated with ‘valence politics’ theories are shown to provide far greater insight into voting behaviour in contemporary Wales.  相似文献   
950.
We contribute to extant policy theory by focusing on interrelationships between existing policies and innovation. In particular, we call attention to the link between supply‐side incentives and demand‐side innovation, which has not been systematically investigated. Our research expectation is that supply‐side policies generally will complement demand‐side policy, leading to a positive impact on the adoption of demand‐side innovations. We test this idea by examining adoptions of renewable portfolio standards (RPS), a demand‐pull approach targeted to renewable energy generation by utilities, in the American states from 1991 to 2008. Event history models show that an index of supply‐side financial incentives has a strong positive influence on RPS adoption. We do not find support for the hypothesis that this effect is contingent on in‐state carbon‐based energy generation. In conclusion, we argue that the study of policy adoption needs to give greater consideration to the interrelationships among policy instruments.  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