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   26445篇
  免费   1427篇
各国政治   1075篇
工人农民   1146篇
世界政治   1799篇
外交国际关系   818篇
法律   17580篇
中国共产党   2篇
中国政治   166篇
政治理论   5111篇
综合类   175篇
  2021年   128篇
  2020年   495篇
  2019年   565篇
  2018年   727篇
  2017年   764篇
  2016年   836篇
  2015年   639篇
  2014年   690篇
  2013年   2659篇
  2012年   670篇
  2011年   734篇
  2010年   701篇
  2009年   754篇
  2008年   738篇
  2007年   738篇
  2006年   751篇
  2005年   656篇
  2004年   635篇
  2003年   564篇
  2002年   606篇
  2001年   1000篇
  2000年   893篇
  1999年   706篇
  1998年   380篇
  1997年   279篇
  1996年   314篇
  1995年   310篇
  1994年   300篇
  1993年   300篇
  1992年   492篇
  1991年   515篇
  1990年   489篇
  1989年   497篇
  1988年   500篇
  1987年   458篇
  1986年   546篇
  1985年   536篇
  1984年   442篇
  1983年   414篇
  1982年   303篇
  1981年   269篇
  1980年   241篇
  1979年   341篇
  1978年   193篇
  1977年   191篇
  1976年   165篇
  1975年   159篇
  1974年   202篇
  1973年   155篇
  1972年   150篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
781.
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   
782.
我的老朋友和同行冯绍雷教授请我谈一谈我对俄罗斯"中国年"的想法,对此我欣然应允。3月26日,俄罗斯"中国年"开幕式在克里姆林宫隆重举行。两国领导人——胡锦涛主席和普京总统在讲话中强调了中俄两国互办"国家年"的意义,强调了两国人民命运和两国主要发展目标上的历史共性。实际上,正是两国领导人自己提出了举办这种大规模活动的倡议。中国艺术家们在克里姆林宫剧院的大型演出,成为中国音乐、舞蹈和杂技艺术所取得的突出成就的真实展示。演员们的表演受到了  相似文献   
783.
Community, demographic, familial, and personal risk factors of childhood depressive symptoms were examined from an ecological theoretical approach using hierarchical linear modeling. Individual-level data were collected from an ethnically diverse (73% African-American) community sample of 197 children and their parents; community-level data were obtained from the U.S. Census regarding rates of community poverty and unemployment in participants’ neighborhoods. Results indicated that high rates of community poverty and unemployment, children’s depressive attributional style, and low levels of self-perceived competence predict children’s depressive symptoms, even after accounting for demographic and familial risk factors, such as parental education and negative parenting behaviors. The effect of negative parenting behaviors on depressive symptoms was partially mediated by personal variables like children’s self-perceived competence. Recommendations for future research, intervention and prevention programs are discussed.
Danielle H. DallaireEmail:

Dr. Danielle H. Dallaire   is an Assistant Professor in the Psychology Department at The College of William and Mary. She received her Ph.D. from Temple University in 2003. Her major research interests include children’s social and emotional development and promoting resiliency in children and families in high risk environments, particularly children and families dealing with parental incarceration. Dr. David A. Cole   is a Professor in the Department of Psychology and Human Development at Vanderbilt University. He received his Ph.D. from The University of Houston in 1983. His major research interests center around developmental psychopathology in general and childhood depression in particular. Dr. Thomas M. Smith   is an Assistant Professor of Public Policy and Education at Vanderbilt University, Peabody College. He received his Ph.D. in 2000 from The Pennsylvania State University. Professor Smith’s current research agenda focuses on the organization of teaching quality, exploring relationships between educational policy (national, state, district, and school level), school organization, teacher commitment, and the quality of classroom instruction. Dr. Jeffrey A. Ciesla   is an Assistant Professor in the Psychology Department at Kent State University. He received his Ph.D. from The State University of New York at Buffalo in 2004. His major research interests include the effects of ruminative thought and stressful life events on depressive disorders. Beth LaGrange,   M.S., is a Doctoral candidate in Clinical Psychology in the Department of Psychology and Human Development at Vanderbilt University. Her current research interests include depression and the development of depressive cognitive style in children and adolescents. Dr. Farrah M. Jacquez   is a Postdoctoral fellow in pediatric psychology at the Mailman Center for Child Development at the University of Miami. She received her Ph.D. from Vanderbilt University in 2006. Her major research interests include parenting in the context of poverty and developing community-based interventions for underserved children and families. Ashley Q. Pineda,   M.S., is a Doctoral candidate in Clinical Psychology in the Department of Psychology and Human Development at Vanderbilt University and is currently completing her internship at the Children’s Hospital at Stanford University. Her major research interests include examining the reciprocal relations between parenting behaviors, depressive cognitions, and childhood depression. Alanna E. Truss,   M.S., is a Doctoral candidate in the Department of Psychology and Human Development at Vanderbilt University. Her major research and clinical interests include developmental factors in internalizing disorders in children and adolescents and the effects of trauma on children and families. Amy S. Folmer   is a graduate student in the Department of Psychology and Human Development at Vanderbilt University. She received her B.A. from The University of Texas in 2003. Her major research interests include cognitive developmental factors that influence the applicability of adult cognitive models of depression to children.  相似文献   
784.
Many studies have documented the ways in which shyness can be a barrier to personal well-being and social adjustment throughout childhood and adolescence; however, less is known regarding shyness in emerging adulthood. Shyness as experienced during emerging adulthood may continue to be a risk factor for successful development. The purpose of this study was to compare shy emerging adults with their non-shy peers in (a) internalizing behaviors, (b) externalizing behaviors, and (c) close relationships. Participants included 813 undergraduate students (500 women, 313 men) from a number of locations across the United States. Results showed that relatively shy emerging adults, both men and women, had more internalizing problems (e.g., anxious, depressed, low self-perceptions in multiple domains), engaged in fewer externalizing behaviors (e.g., less frequent drinking), and experienced poorer relationship quality with parents, best friends, and romantic partners than did their non-shy peers.
Larry J. NelsonEmail:

Larry J. Nelson   is an Associate Professor in the School of Family Life at Brigham Young University. He received his Ph.D. in 2000 from the University of Maryland, College Park. His major research interests are in social and self development during early childhood and emerging adulthood. Laura M. Padilla-Walker   is an Assistant Professor in the School of Family Life at Brigham Young University. She received her Ph.D. in 2005 from the University of Nebraska—Lincoln. Her major research interests center on the parent-adolescent relationship as it relates to adolescents’ moral and prosocial behaviors and internalization of values. Sarah Badger   received her Ph.D. in 2005 from Brigham Young University. Her major research interests are marriage formation and development as well as emerging adulthood and marriage readiness. Carolyn McNamara Barry   is an Assistant Professor of Psychology at Loyola College in Maryland. She received her Ph.D. in 2001 from the University of Maryland, College Park. Her major research interests are in social and self development during adolescence and emerging adulthood. Jason S. Carroll   is an Associate Professor in the School of Family Life at Brigham Young University. He received his Ph.D. in 2001 from the University of Minnesota. His major research interests are in marriage formation and development as well as emerging adulthood and marriage readiness. Stephanie D. Madsen   is an Associate Professor of Psychology at McDaniel College. She received her Ph.D. in 2001 from the Institute of Child Development, University of Minnesota. She is particularly interested in how relationships with significant others impact child and adolescent development.  相似文献   
785.
The purpose of this study was to gain a clearer understanding of the relation between parents’ knowledge of their emerging-adult children and emerging adults’ risk behaviors. Participants included 200 undergraduate students between the ages of 18 and 25 (121 women, 78 men; M age = 19.59, SD = 1.62) and both of their parents. Results revealed that knowledge of the emerging-adult child’s activities varied as a function of parent- and child-reports, and that child outcomes associated with parental knowledge were generally positive, including less drinking, drug use, and risky sexual behavior (although this varied as a function of reporter). The links between maternal knowledge and lower drug and alcohol use were particularly strong in the presence of maternal closeness. Implications for understanding the parent–child relationship during the transition to adulthood were discussed.
Laura M. Padilla-WalkerEmail:
  相似文献   
786.
This study examined dimensions of mothers’ and fathers’ involvement in adolescents’ romantic relationships when offspring were age 17. Using cluster analysis, parents from 105 White, working and middle class families were classified as positively involved, negatively involved, or autonomy-oriented with respect to their adolescents’ romantic relationships. Patterns of parental involvement were generally not associated with parent–offspring relationship quality at about adolescent age 13, but earlier parent–offspring relationship quality moderated the associations between parental involvement and adolescent romantic experiences at about age 18. Positive parent–offspring relationship quality buffered the effects of negative parental involvement, whereas poorer parent–offspring relationship quality was a more adaptive context for adolescents of autonomy-oriented parents. Discussion focuses on the importance of parenting practices in adolescent romantic relationships and the emotional climate of parent–offspring relationships as a developmental context for those practices.
Marni L. KanEmail:
  相似文献   
787.
Little research has examined the consequences of a suicide for social or family networks. Because suicide occurs within families, the focus on the aftermath of suicide within families is an important next step to determine exactly how to help survivors. In this article, we review and summarize the research on the impact of suicide on individuals within families and on family and social networks. We begin with a discussion of family changes following suicide. Next, we discuss the effects of suicide on social networks overall and responses of children and the elderly to a suicide in the family. Finally, we identify key issues that remain to be resolved in family survivor research and make recommendations for future studies.  相似文献   
788.
789.
In 2005 Indonesian and European institutes joined to start the first step for the implementation of an Ocean Operational System in the Indonesian archipelago. The system will support the decision making process for the sustainable use of marine resources, providing useful information and added value products as well as a service for an improved management of the sea with high business impact to targeted groups as public authorities and commercial operators (coastal managers, fishermen, shipping companies). In this paper the System is shortly described with its potential benefits and economic and social impacts.
A. Ribotti (Corresponding author)Email:
R. Sorgente
A. Hanggono
G. M. R. Manzella
N. Hendiarti
L. Fusco
T. R. Adi
Y. S. Djajadihardja
A. R. Farhan
M. C. G. Frederik
W. F. Ma’ruf
B. Realino
V. Rupolo
P. Ruti
M. Sadly
F. Syamsudin
B. A. Subki
  相似文献   
790.
The increasing complexity of policy problems, coupled with the political desire to base new policies on the foundation of firm evidence, has accelerated the development of policy assessment tools. These range from complex computer models and cost benefit analysis through simple checklists and decision trees. In the last decade, many governments have established formal policy assessment systems to harness these tools in order to facilitate more evidence-based policy making. These tools are potentially widely available, but to what extent are they used by policy makers and what becomes of the evidence that they generate? This paper addresses these questions by studying the empirical patterns of tool use across 37 cases in three European countries and the European Commission. It uses a simple classification of tools into advanced, formal and simple types. It finds that even when tools are embedded in policy assessment systems, their use is differentiated and on the whole very limited, in particular when it comes to more advanced tools. It then explores these patterns from contrasting theoretical perspectives to shed light on why, when and how different policy assessment tools are used in the policy process.  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