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   21114篇
  免费   1316篇
各国政治   838篇
工人农民   997篇
世界政治   1409篇
外交国际关系   698篇
法律   14562篇
中国共产党   2篇
中国政治   125篇
政治理论   3689篇
综合类   110篇
  2023年   105篇
  2021年   107篇
  2020年   467篇
  2019年   505篇
  2018年   646篇
  2017年   657篇
  2016年   743篇
  2015年   552篇
  2014年   608篇
  2013年   2155篇
  2012年   563篇
  2011年   608篇
  2010年   606篇
  2009年   656篇
  2008年   605篇
  2007年   598篇
  2006年   617篇
  2005年   500篇
  2004年   514篇
  2003年   438篇
  2002年   473篇
  2001年   811篇
  2000年   747篇
  1999年   596篇
  1998年   287篇
  1997年   223篇
  1996年   236篇
  1995年   235篇
  1994年   224篇
  1993年   219篇
  1992年   387篇
  1991年   391篇
  1990年   395篇
  1989年   370篇
  1988年   414篇
  1987年   362篇
  1986年   396篇
  1985年   404篇
  1984年   318篇
  1983年   284篇
  1982年   219篇
  1981年   192篇
  1980年   180篇
  1979年   264篇
  1978年   145篇
  1977年   112篇
  1976年   104篇
  1975年   120篇
  1974年   156篇
  1973年   104篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
Over the last decade, essentially since the Asian crisis of 1997–98, the economic integration of Northeast Asia has been marked by three overarching trends. Economic relations have become: 1) more institutionalized; 2) more “Asian;” and 3) more China-centric. These macro-trends are demonstrated and analyzed in the paper. But by way of anticipation, numerous counter-cutting facts need also to be kept in mind. In essence, recent trends, notable as they are, have by no means reversed three counter-realities: 1) economic ties are still largely driven, less by governments and formal arrangements, than by corporations in search of profits and production efficiencies; 2) despite growing economic interdependence across Northeast Asia and between that sub-region and Southeast Asia, Japan, China and South Korea remain heavily linked to global, and particularly US, markets; and 3) though China is an ever important hub in Northeast Asian trade and investment, Japan remains by far the most powerful economic player in the region.  相似文献   
982.
983.
The transition to high school has been identified as a potentially difficult time in adolescents’ lives. Reductions in both academic and social functioning often accompany this transition. While these effects have been documented in urban youth, the move to high school has not been extensively studied in rural minority youth. Toward that end, the academic grades and substance use in ninth grade of 447 (184 male and 263 female) African-American adolescents from two rural counties in a state in the deep South were examined in relation to configurations of adaptation from sixth through eighth grade. Results indicate that individual with consistently positive patterns across middle school had higher grades and lower rates of substance use compared to individuals with persistent difficulties or those that transitioned to problem behavior. Many individuals who improved in their patterns of adaptation had relatively high grades, but also rather high rates of substance use in the ninth grade. David B. Estell is an assistant professor of educational psychology at Indiana University Bloomington. He received his PhD in Developmental Psychology from the University of North Carolina at Chapel Hill. His major research interests include peer relations and the development of aggression. Thomas W. Farmer is an associate professor of education at Pennsylvania State University and director of the National Research Center on Rural Education Support. He received his PhD in Special Education from University of North Carolina at Chapel Hill. His major research interests include peer relations and the development of aggression in students with and without special needs. Matthew J. Irvin is a research scientist at the Center for Developmental Science at the University of North Carolina at Chapel Hill. He received his PhD in Educational Psychology from the University of North Carolina at Chapel Hill. His major research interests include resilience and student engagement. Jana H. Thompson is a research associate at the Center for Developmental Science at the University of North Carolina at Chapel Hill. Her research interests include peer social relations and developmental transitions into early adolescence. Bryan C. Hutchins is a research assistant at the Center for Developmental Science at the University of North Carolina at Chapel Hill. He is also a graduate student in the Educational Psychology, Measurement, and Evaluation Program at UNC. His research interests include child and adolescent social development and school based emotional and behavioral interventions and prevention programs. Erin M. McDonough is currently a doctoral candidate in School Psychology at the University of North Carolina at Chapel Hill. She received her Bachelor of Arts degree in Psychology from Emory University. As a research assistant at the Center for Developmental Science, she has been able to explore her interests in student achievement as well as rural education. Another major research interest of hers is school-based mental health.  相似文献   
984.
This research examined the “mental health literacy” of adolescents concerning eating-disordered behavior. A vignette describing a fictional 16-year old female meeting diagnostic criteria for bulimia nervosa was presented to 522 female high school students, followed by a series of questions concerning treatment of and treatment-seeking for the problem described. Results indicated that primary care practitioners, mothers and close female friends were most highly regarded as potential sources of help. Self-help interventions, including the use of vitamins and minerals, were also highly regarded, whereas participants were less positive about the benefits of mental health specialists and ambivalent about the use of anti-depressant medication. Most participants believed that the problem described would be difficult to treat, and that relapse was likely even given appropriate treatment. An additional finding of note was that among participants with a high level of eating disorder symptoms (n=36, 6.9%), recognition of an eating problem was poor. We conclude that beliefs likely to be conducive to low and/or inappropriate treatment-seeking for eating problems may be common among adolescent girls. In addition, the findings suggest that prevention programs for the eating disorders need to target not only at-risk individuals, but also individuals in their immediate social environment.  相似文献   
985.
986.
987.
We investigate the role of payoff asymmetry in laboratory prisoner’s dilemma games. Symmetric and asymmetric games are examined in simultaneous and sequential settings. In the asymmetric sequential games, we study the impact of having payoff advantaged players moving either first or second. Asymmetry reduces the rates of cooperation in simultaneous games. In sequential games, asymmetry interacts with order of play such that the rate of cooperation is highest when payoff disadvantaged players move first.  相似文献   
988.
A minimax procedure for electing committees   总被引:1,自引:0,他引:1  
A new voting procedure for electing committees, called the minimax procedure, is described. Based on approval balloting, it chooses the committee that minimizes the maximum Hamming distance to voters’ ballots, where these ballots are weighted by their proximity to other voters’ ballots. This minimax outcome may be diametrically opposed to the outcome obtained by aggregating approval votes in the usual manner, which minimizes the sum of the Hamming distances and is called the minisum outcome. The manipulability of these procedures, and their applicability when election outcomes are restricted in various ways, are also investigated. The minimax procedure is applied to the 2003 Game Theory Society election of a council of 12 new members from a list of 24 candidates. By rendering outlying voters less influential and not antagonizing any voters too much, it arguably would have produced a committee more representative of the interests of all voters than the minisum committee that was elected.  相似文献   
989.
990.
According to A. O. Hirschman, party members who are dissatisfied with their party's policy have two options: they can either leave the party (exit) or try to change party policy (voice). Research has shown that leadership control over policy is extremely high, leaving membership influence virtually non-existent. On that basis, exit seems the only viable membership reaction to dissatisfaction with party policy. Nevertheless, research has also shown that voice is of great importance to members; hence it is voice that will be the main focus of this article, which examines the circumstances under which party members are likely to opt for voice over exit and what factors are likely to hamper voice. Using a study of the Danish Socialist Peoples Party, the Danish Social Democrats and the British Labour Party, the article shows that despite the odds stacked against them, some party members do make use of the opportunities for voice offered by the party conference, but also that they often face significant obstacles in exercising it.  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