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   782篇
  免费   28篇
管理学   63篇
民族学   5篇
人口学   45篇
丛书文集   1篇
理论方法论   126篇
综合类   10篇
社会学   503篇
统计学   57篇
  2023年   7篇
  2021年   6篇
  2020年   19篇
  2019年   25篇
  2018年   23篇
  2017年   30篇
  2016年   25篇
  2015年   20篇
  2014年   35篇
  2013年   156篇
  2012年   33篇
  2011年   19篇
  2010年   15篇
  2009年   19篇
  2008年   33篇
  2007年   24篇
  2006年   21篇
  2005年   27篇
  2004年   33篇
  2003年   13篇
  2002年   21篇
  2001年   8篇
  2000年   14篇
  1999年   7篇
  1998年   18篇
  1997年   15篇
  1996年   12篇
  1995年   10篇
  1994年   7篇
  1993年   8篇
  1992年   5篇
  1991年   10篇
  1990年   7篇
  1989年   4篇
  1988年   4篇
  1987年   4篇
  1986年   8篇
  1985年   7篇
  1984年   12篇
  1983年   3篇
  1981年   6篇
  1980年   5篇
  1979年   4篇
  1978年   3篇
  1977年   3篇
  1976年   4篇
  1972年   2篇
  1971年   2篇
  1970年   3篇
  1968年   3篇
排序方式: 共有810条查询结果,搜索用时 15 毫秒
1.
2.
3.
Epidemiological data show high rates of suicide attempts among adolescent Latinas. Few studies have addressed the psychosocial, cultural and family correlates of suicide attempts among this age group of a rapidly growing population. The authors studied 31 adolescent Hispanic females who were receiving mental health services; 14 girls had attempted suicide in the previous five years and 17 had never attempted suicide. The two groups of girls did not differ significantly with respect to demographic profiles, levels of depression, family type, acculturation, or self-esteem. However, as hypothesized, the mutuality between girls and their mothers was lower among suicide attempters. Maladaptive coping skills of withdrawal and wishful thinking were more commonly used by attempters, and non-attempters used emotional regulation and problem-solving more frequently. Findings are discussed within the context of the empirical and theoretical literature and implications for practice are considered.  相似文献   
4.
5.
This paper examines the role of boards of directors in light of institutional contingencies and recent best practice governance guidelines and regulation such as the United Kingdom Higgs Review and the United States Sarbanes‐Oxley Act 2002. Particular attention is paid to discussing the role of independent directors across countries, and the implications for corporate governance innovation. It concludes by posing questions about recent corporate governance transformations and providing suggestions for future research.  相似文献   
6.
7.
Summary.  To help to design vaccines for acquired immune deficiency syndrome that protect broadly against many genetic variants of the human immunodeficiency virus, the mutation rates at 118 positions in HIV amino-acid sequences of subtype C versus those of subtype B were compared. The false discovery rate (FDR) multiple-comparisons procedure can be used to determine statistical significance. When the test statistics have discrete distributions, the FDR procedure can be made more powerful by a simple modification. The paper develops a modified FDR procedure for discrete data and applies it to the human immunodeficiency virus data. The new procedure detects 15 positions with significantly different mutation rates compared with 11 that are detected by the original FDR method. Simulations delineate conditions under which the modified FDR procedure confers large gains in power over the original technique. In general FDR adjustment methods can be improved for discrete data by incorporating the modification proposed.  相似文献   
8.
9.
10.
Composition-consistent tournament solutions and social choice functions   总被引:1,自引:1,他引:0  
This paper introduces a new axiom for choice in preference profiles and tournaments, called composition-consistency. A social choice function is composition-consistent if it is non-sensitive to the cloning of one or several outcomes. The key feature of the composition consistency property is an operation concept called multiple composition product of profiles. The paper provides a brief overview of some social choice functions studied in the literature. Concerning the tournament solutions, it is proved that the Top Cycle, the Slater and the Copeland solutions are not composition-consistent, whereas the Banks, Uncovered Set, TEQ, Minimal Covering Set are composition-consistent. Moreover, we define the composition-consistent hull of a solution as the smallest composition-consistent solution containing . The composition-consistent hulls of the Top cycle and Copeland solutions are specified, and we give some hints about the location of the hull of the Slater set. Concerning social choice functions, it is shown that Kemeny, Borda and Minimax social choice functions are not composition-consistent, whereas the Paretian one is composition-consistent. Moreover, we prove that the latter is the composition-consistent hull of the Borda and Minimax functions.  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