全文获取类型
收费全文 | 20792篇 |
免费 | 593篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2998篇 |
民族学 | 83篇 |
人才学 | 1篇 |
人口学 | 2009篇 |
丛书文集 | 87篇 |
教育普及 | 2篇 |
理论方法论 | 1958篇 |
现状及发展 | 1篇 |
综合类 | 272篇 |
社会学 | 10204篇 |
统计学 | 3771篇 |
出版年
2021年 | 125篇 |
2020年 | 325篇 |
2019年 | 457篇 |
2018年 | 507篇 |
2017年 | 683篇 |
2016年 | 538篇 |
2015年 | 395篇 |
2014年 | 524篇 |
2013年 | 3293篇 |
2012年 | 693篇 |
2011年 | 671篇 |
2010年 | 513篇 |
2009年 | 406篇 |
2008年 | 490篇 |
2007年 | 521篇 |
2006年 | 511篇 |
2005年 | 494篇 |
2004年 | 444篇 |
2003年 | 419篇 |
2002年 | 467篇 |
2001年 | 557篇 |
2000年 | 557篇 |
1999年 | 496篇 |
1998年 | 360篇 |
1997年 | 336篇 |
1996年 | 339篇 |
1995年 | 319篇 |
1994年 | 300篇 |
1993年 | 306篇 |
1992年 | 352篇 |
1991年 | 331篇 |
1990年 | 299篇 |
1989年 | 311篇 |
1988年 | 298篇 |
1987年 | 261篇 |
1986年 | 249篇 |
1985年 | 287篇 |
1984年 | 278篇 |
1983年 | 257篇 |
1982年 | 222篇 |
1981年 | 192篇 |
1980年 | 175篇 |
1979年 | 202篇 |
1978年 | 184篇 |
1977年 | 163篇 |
1976年 | 140篇 |
1975年 | 161篇 |
1974年 | 122篇 |
1973年 | 117篇 |
1972年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Christian P. Robert Xiao-Li Meng Jesper Møller Jeffrey S Rosenthal C Jennison M. A Hurn F Al-Awadhi Peter McCullagh Christophe Andrieu Arnaud Doucet Petros Dellaportas Ioulia Papageorgiou Ricardo S Ehlers Elena A Erosheva Stephen E Fienberg Jonathan J Forster Roger C Gill Nial Friel Peter Green David Hastie R King Hans R Künsch N. A. Lazar C Osinski 《Journal of the Royal Statistical Society. Series B, Statistical methodology》2003,65(1):39-55
92.
93.
Banks winners in tournaments are difficult to recognize 总被引:1,自引:0,他引:1
Gerhard J. Woeginger 《Social Choice and Welfare》2003,20(3):523-528
Given a tournament T, a Banks winner of T is the top vertex of any maximal (with respect to inclusion) transitive subtournament of T. In this technical note, we show that the problem of deciding whether some fixed vertex v is a Banks winner for T is NP-complete.
Received: 22 February 2002/Accepted: 20 June 2002
Supported by the START program Y43-MAT of the Austrian Ministry of Science.
I would like to thank two thank the referees for a careful reading of the paper, for helpful remarks, and for many suggestions
how to improve the presentation. 相似文献
94.
Lisa A. Gennetian Greg Duncan Virginia Knox Wanda Vargas Elizabeth Clark‐Kauffman Andrew S. London 《Journal of research on adolescence》2004,14(4):399-423
Using data from 8 random assignment studies and employing meta‐analytic techniques, this article provides systematic evidence that welfare and work policies targeted at low‐income parents have small adverse effects on some school outcomes among adolescents ages 12 to 18 years at follow‐up. These adverse effects were observed mostly for school performance outcomes and occurred in programs that required mothers to work or participate in employment‐related activities and those that encouraged mothers to work voluntarily. The most pronounced negative effects on school outcomes occurred for the group of adolescents who had a younger sibling, possibly because of the increased home and sibling care responsibilities they assumed as their mothers increased their employment. 相似文献
95.
Using an experimental design, this research examines the effect of the nation's first family cap on the births, abortions, and contraception use of over 8,000 women receiving public assistance in New Jersey. The family cap denies additional cash benefits to children conceived while the mother is receiving public assistance. Our research shows that a targeted welfare benefit manipulation does influence fertility behavior; however, the effect is conditioned by race. We find that Black women in the experimental group have a 21% lower birth rate and a 32% higher abortion rate than Black women in the control group. We do not find a birth effect for Hispanic or White women. We discuss the policy implications of the effects of a segmented family cap. 相似文献
96.
This article aims to bring gender into an even tighter transnational migration focus by broadening and deepening our original framework of “gendered geographies of power,” linking it more directly to existing and emerging scholarship. We examine and highlight previously neglected areas such as the role of the state and the social imaginary in gendering transnational processes and experiences. We identify topics that remain under‐appreciated, under‐researched, and/or under‐theorized. Finally, we initiate a discussion of how a gendered analysis of transnational migration can help bridge this particular research to other gendered transnational processes under study that do not privilege migration. 相似文献
97.
Testing symmetry under a skew Laplace model 总被引:3,自引:0,他引:3
Tomasz J. Kozubowski Anna K. Panorska 《Journal of statistical planning and inference》2004,120(1-2):41-63
We develop tests of hypothesis about symmetry based on samples from possibly asymmetric Laplace distributions and present exact and limiting distribution of the test statistics. We postulate that the test statistic derived under the Laplace model is a rational choice as a measure of skewness and can be used in testing symmetry for other, quite general classes of skew distributions. Our results are applied to foreign exchange rates for 15 currencies. 相似文献
98.
David Campbell 《Australian and New Zealand Journal of Family Therapy》2003,24(1):15-25
The author traces the development of the Milan approach from the beginning, through the split into two teams in 1980, and subsequent developments in theory and application. He identifies possible unrecognised or undeclared influences of Milan in other family therapy approaches. 相似文献
99.
W. Andrew Collins 《Journal of research on adolescence》2003,13(1):1-24
Adolescents' romantic relationships have attracted popular interest, but, until recently, little scientific curiosity. Research has been impeded by erroneous assumptions that adolescent relationships are trivial and transitory, that they provide little information beyond measures of the influence of parent‐child and peer relationships, and that their impact is primarily associated with problems of behavior and adjustment. This article proposes that distinguishing five features of romantic relationships (involvement, partner selection, relationship content, quality, and cognitive and emotional processes) is essential to describing adolescents' relationships and their developmental significance. These distinctions also help to clarify the role of context, age‐related variations, and individual differences in the impact of romantic experiences. Research is needed to illuminate questions of how and under what conditions romantic relationships affect individual development and how romantic and other close relationships jointly influence developmental trajectories during adolescence. 相似文献
100.
Mr. Patrick J. Morrissette M.S.ED. 《Child and Adolescent Social Work Journal》1994,11(3):235-246
This paper proposes a developmental framework for foster parents and outlines four distinct growth stages. Such a framework can be of value to program administrators who are required to assess foster parent development during the crucial matching process. To draw a distinction between each developmental stage, specific instrumental tasks and indicators are outlined. 相似文献