全文获取类型
收费全文 | 16980篇 |
免费 | 453篇 |
专业分类
管理学 | 2476篇 |
民族学 | 89篇 |
人才学 | 3篇 |
人口学 | 1710篇 |
丛书文集 | 96篇 |
教育普及 | 1篇 |
理论方法论 | 1659篇 |
现状及发展 | 1篇 |
综合类 | 187篇 |
社会学 | 8288篇 |
统计学 | 2923篇 |
出版年
2023年 | 100篇 |
2021年 | 80篇 |
2020年 | 261篇 |
2019年 | 335篇 |
2018年 | 355篇 |
2017年 | 518篇 |
2016年 | 435篇 |
2015年 | 292篇 |
2014年 | 386篇 |
2013年 | 2926篇 |
2012年 | 553篇 |
2011年 | 465篇 |
2010年 | 398篇 |
2009年 | 402篇 |
2008年 | 449篇 |
2007年 | 434篇 |
2006年 | 400篇 |
2005年 | 433篇 |
2004年 | 450篇 |
2003年 | 393篇 |
2002年 | 433篇 |
2001年 | 430篇 |
2000年 | 410篇 |
1999年 | 396篇 |
1998年 | 298篇 |
1997年 | 267篇 |
1996年 | 251篇 |
1995年 | 251篇 |
1994年 | 222篇 |
1993年 | 248篇 |
1992年 | 246篇 |
1991年 | 233篇 |
1990年 | 214篇 |
1989年 | 239篇 |
1988年 | 215篇 |
1987年 | 186篇 |
1986年 | 206篇 |
1985年 | 238篇 |
1984年 | 225篇 |
1983年 | 213篇 |
1982年 | 180篇 |
1981年 | 153篇 |
1980年 | 149篇 |
1979年 | 177篇 |
1978年 | 132篇 |
1977年 | 131篇 |
1976年 | 136篇 |
1975年 | 128篇 |
1974年 | 109篇 |
1973年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
381.
In late 2009 China launched an innovative, voluntary programme that by 2011 had extended pension coverage to 326.4 million people in the rural sector, including contributors and beneficiaries. It requires one contribution per year and provides a flat‐rate benefit and a contributions‐related benefit through a contributory individual account, with a government guarantee that the benefit will continue for life. The programme encourages participation of persons who do not pay income taxes, and thus have no tax incentive to participate, by providing substantial government subsidies. As a further incentive, old‐age benefits are provided to older parents when all their adult children participate in the contributory programme. 相似文献
382.
383.
Marie‐Pier Vaillancourt‐Morel Natacha Godbout Stéphane Sabourin John Briere Yvan Lussier Marsha Runtz 《Journal of marital and family therapy》2016,42(2):341-356
This study tested a moderation model in which the association between child sexual abuse severity and negative sexual outcomes (i.e., sexual avoidance and compulsivity) differed as a function of relationships status (i.e., single, cohabiting, and married individuals). A sample of 1,033 adults completed self‐report questionnaires online, and 21.5% reported childhood sexual abuse. Path analyses indicated that child sexual abuse severity was associated with higher sexual compulsivity in single individuals, both higher sexual avoidance and compulsivity in cohabiting individuals, and higher sexual avoidance in married individuals. The moderation model was invariant across men and women. These results suggest that the time course of negative sexual outcomes associated with child sexual abuse may follow distinct patterns of expression according to relationship status. 相似文献
384.
John Michael Roberts 《Journal for the theory of social behaviour》2014,44(1):1-23
Critical realism has been an important advance in social science methodology because it develops a qualitative theory of causality which avoids some of the pitfalls of empiricist theories of causality. But while there has been ample work exploring the relationship between critical realism and qualitative research methods there has been noticeably less work exploring the relationship between dialectical critical realism and qualitative research methods. This seems strange especially since the founder of the philosophy of critical realism, Roy Bhaskar, employs and develops a range of dialectical concepts in his later work in order to extend the main tenets of critical realism. The aim of this paper is to draw on Bhaskar's later work, as well as Marxism, to reorient a critical realist methodology towards a dialectical approach for qualitative research. In particular, the paper demonstrates how dialectical critical realism can begin to provide answers to three common criticisms made against original critical realist methodology: that the qualitative theory of causal powers and structures developed by critical realists is problematic; that critical realist methodology contains values which prove damaging to empirical research; and that critical realists often have difficulties in researching everyday qualitative dilemmas that people face in their daily lives. 相似文献
385.
386.
387.
A new numerical method to solve the downdating problem (and variants thereof), namely removing the effect of some observations from the generalized least squares (GLS) estimator of the general linear model (GLM) after it has been estimated, is extensively investigated. It is verified that the solution of the downdated least squares problem can be obtained from the estimation of an equivalent GLM, where the original model is updated with the imaginary deleted observations. This updated GLM has a non positive definite dispersion matrix which comprises complex covariance values and it is proved herein to yield the same normal equations as the downdated model. Additionally, the problem of deleting observations from the seemingly unrelated regressions model is addressed, demonstrating the direct applicability of this method to other multivariate linear models. The algorithms which implement the novel downdating method utilize efficiently the previous computations from the estimation of the original model. As a result, the computational cost is significantly reduced. This shows the great usability potential of the downdating method in computationally intensive problems. The downdating algorithms have been applied to real and synthetic data to illustrate their efficiency. 相似文献
388.
389.
Marloes de Lange Maarten H. J. Wolbers Maurice Gesthuizen Wout C. Ultee 《Revue europeenne de demographie》2014,30(2):161-185
In this paper, we study the impact of macro- and micro-economic uncertainty on family formation between 1970 and 2000 in The Netherlands. Using data of the Family Survey Dutch Population, we analysed the monthly hazard rates of experiencing the transition into first union, first marriage and parenthood after the start of the relationship of 365 male and 364 female partners by applying piecewise-constant exponential models. The results show that macro-economic uncertainties, i.e. high unemployment rates, lead to postponement of the first union and marriage, but not of the first child. In addition, we found that this relationship is not interpreted by individual-level employment insecurity, i.e. temporary employment or unemployment, which does not seem to prevent people from making long-term family commitments. Although hypothesized, we did not find that the negative effects of macro- and micro-level insecurities on family formation reinforce each other or that they vary between individuals with different educational qualifications. 相似文献
390.