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   344篇
  免费   11篇
各国政治   17篇
工人农民   54篇
世界政治   25篇
外交国际关系   17篇
法律   180篇
中国政治   1篇
政治理论   56篇
综合类   5篇
  2023年   2篇
  2022年   2篇
  2020年   6篇
  2019年   9篇
  2018年   9篇
  2017年   13篇
  2016年   14篇
  2015年   4篇
  2014年   10篇
  2013年   51篇
  2012年   12篇
  2011年   14篇
  2010年   8篇
  2009年   8篇
  2008年   8篇
  2007年   7篇
  2006年   15篇
  2005年   6篇
  2004年   8篇
  2003年   6篇
  2002年   15篇
  2001年   7篇
  2000年   6篇
  1999年   6篇
  1998年   3篇
  1997年   6篇
  1996年   7篇
  1995年   5篇
  1993年   2篇
  1992年   6篇
  1991年   3篇
  1990年   4篇
  1989年   6篇
  1988年   6篇
  1987年   2篇
  1985年   5篇
  1984年   3篇
  1982年   5篇
  1980年   17篇
  1979年   2篇
  1977年   6篇
  1976年   3篇
  1973年   3篇
  1971年   1篇
  1969年   1篇
  1967年   1篇
  1966年   2篇
  1956年   1篇
  1935年   1篇
  1932年   1篇
排序方式: 共有355条查询结果,搜索用时 31 毫秒
311.
Research has documented the relationship between family stressors such as family economic hardship and marital conflict and adolescents’ mental health symptoms, especially depressive symptoms. Few studies, however, have examined the processes whereby supportive parenting lessens this effect and the progression of mental health and physical health symptoms in adolescence. The present study investigates the influences of chronic family economic hardship on adolescents’ multiple health problem symptoms (i.e., symptoms of anxiety, and depression and physical complaints) through parents’ marital conflict, and supportive parenting; it also examines how there adolescents’ health problems mutually influence one another throughout adolescence. We used Structural Equation Modeling to analyze data from a longitudinal sample of European American mothers, fathers, and target adolescents (N = 451, 53 % female) to examine direct and indirect effects. Findings generally supported the hypothesized model. Chronic family economic hardship contributed to mental and physical health problems of adolescents. This influence largely was mediated through supportive parenting. Moreover, supportive parenting buffered marital conflict on depressive symptoms of adolescents. Also, there was a tendency for females to show more stable depressive symptoms than males. The study demonstrates key mediating pathways and additional moderating influences based on the family stress model and also highlights the importance of improving health resources for adolescents.  相似文献   
312.
313.
314.
This study examined the association between perceptions of children's care needs and maternal sensitivity with 76 dyads in foster care. Foster mothers were more sensitive to typically developing children perceived as requiring easier care and were less sensitive to children with developmental delays. Adopting foster mothers were sensitive with children requiring complex care. Older children were perceived to need more care and to be delayed in development. Nearly half of the sample were perceived to be developmentally delayed. Foster mothers were less sensitive to children with multiple placements. Perceptions of caregiving needs can influence the quality of interactions.  相似文献   
315.
Climate change is posing an increasingly severe challenge to agricultural livelihoods due to increased frequency and intensity of extreme weather events. Livelihood diversification can play an important role in decreasing food insecurity and vulnerability under these challenges. This paper contributes to the literature on livelihood diversification and vulnerability under climate change to assess the role of diversification as part of a Climate-Smart Agriculture strategy by analysing the determinants of diversification, income and poverty in Zambia using panel data. We specifically focus on the roles of climate shocks and institutions in shaping these linkages to highlight policy insights to improve resilience.  相似文献   
316.
Using a variant of the ecological-transactional model and developmental theories of delinquency on a nationally representative sample of adolescents, the current study explored the ecological predictors of violent victimization, perpetration, and both for three different developmental stages during adolescence. We examined the relative influence of individual and family characteristics, peers, and neighborhood characteristics on the odds of experiencing violent victimization and perpetration over time with two waves of the National Longitudinal Study of Adolescent Health for those adolescents who reported no exposure to violence at Wave 1 (N = 8,267; 50% female; 59% Caucasian; 17% African-American; 14% Hispanic). We found that more proximal factors differentiated between different experiences with violence at Wave 2. Also, negative peers significantly differentiated between violent victimization and perpetration, and this influence was strongest in early adolescence. In exploratory analyses, we found that middle adolescents were particularly vulnerable to their disadvantaged neighborhoods for a high-risk group. This analysis is one of the few that considers multiple ecological contexts simultaneously and provides support for developmental differences within adolescence on the influence that peers and neighborhoods have in predicting violent victimization and perpetration.  相似文献   
317.
When Bill Clinton embraced national service as one of his administration's priorities, he took a step forward on two of his key initiatives. Not only was national service a new initiative in its own right, but Clinton also held it up as a model of his efforts to reinvent government. It would be an exemplar of government that is catalytic, competitive, decentralized, and results oriented. This case study examines the theory and reality of reinvention. The Corporation for National Service and its programs have come under fire for being more political than catalytic, being simultaneously too centralized and too decentralized, and pursuing too many unclear goals. This article seeks to identify discontinuities between the rhetoric and the reality of reinvention in this instance and draw lessons for public-sector reform.  相似文献   
318.
319.
Despite research documenting high rates of violence during pregnancy, few studies have examined the impact of physical abuse, psychological abuse, and posttraumatic stress disorder (PTSD) on miscarriage. Secondary analysis of data collected by the Chicago Women's Health Risk Study permitted an exploration of the relationships among physical abuse, psychological abuse, PTSD, and miscarriage among 118 primarily ethnic minority women. The interaction between maximum severity of abuse and age provided the best multivariate predictor of miscarriage rate, accounting for 26.9% of the variance between live birth and miscarriage outcome. Mean scores of psychological abuse, physical violence, forced sex, and PTSD were significantly higher in the miscarriage group than in the live birth group. Women who experience physical violence and psychological abuse during pregnancy may be at greater risk for miscarriage. Prospective studies can confirm findings and determine underlying mechanisms. Routine screening for traumatic stress and PTSD may reduce rates of miscarriage.  相似文献   
320.
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