全文获取类型
收费全文 | 102019篇 |
免费 | 3342篇 |
国内免费 | 75篇 |
专业分类
管理学 | 12009篇 |
劳动科学 | 36篇 |
民族学 | 914篇 |
人才学 | 32篇 |
人口学 | 7360篇 |
丛书文集 | 4061篇 |
教育普及 | 1篇 |
理论方法论 | 10083篇 |
综合类 | 7499篇 |
社会学 | 43865篇 |
统计学 | 19576篇 |
出版年
2023年 | 543篇 |
2022年 | 402篇 |
2021年 | 745篇 |
2020年 | 1680篇 |
2019年 | 2309篇 |
2018年 | 2290篇 |
2017年 | 3481篇 |
2016年 | 2610篇 |
2015年 | 2395篇 |
2014年 | 3051篇 |
2013年 | 19418篇 |
2012年 | 3100篇 |
2011年 | 3138篇 |
2010年 | 2953篇 |
2009年 | 3148篇 |
2008年 | 2935篇 |
2007年 | 2921篇 |
2006年 | 3114篇 |
2005年 | 3134篇 |
2004年 | 2584篇 |
2003年 | 2227篇 |
2002年 | 2333篇 |
2001年 | 2399篇 |
2000年 | 2030篇 |
1999年 | 1945篇 |
1998年 | 1629篇 |
1997年 | 1496篇 |
1996年 | 1479篇 |
1995年 | 1459篇 |
1994年 | 1382篇 |
1993年 | 1289篇 |
1992年 | 1261篇 |
1991年 | 1221篇 |
1990年 | 1200篇 |
1989年 | 1015篇 |
1988年 | 1115篇 |
1987年 | 968篇 |
1986年 | 891篇 |
1985年 | 1077篇 |
1984年 | 1120篇 |
1983年 | 982篇 |
1982年 | 899篇 |
1981年 | 814篇 |
1980年 | 790篇 |
1979年 | 843篇 |
1978年 | 724篇 |
1977年 | 660篇 |
1976年 | 597篇 |
1975年 | 568篇 |
1974年 | 470篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
This qualitative study examines the narratives of seven heterosexual, cisgender individuals who identify both as persons of color and as positively disposed toward LGB and transgender-identified persons. Using psycho-discursive qualitative methodology, the authors will present the narrative strategies taken up by these positively disposed cisgender heterosexuals of color as they attempt to position themselves as supportive of LGB and transgender persons while negotiating the discourse of heteronormativity. The three narrative strategies have been titled differentiation, empathy, and coherence. In addition to mapping the three narrative strategies, the authors also explore why informants may choose certain strategies over others and argue that the intersection of social identities must be considered when attempting to understand social oppression. Implications for the human services fields will be discussed. 相似文献
32.
In this article, we propose a novel approach for testing the equality of two log-normal populations using a computational approach test (CAT) that does not require explicit knowledge of the sampling distribution of the test statistic. Simulation studies demonstrate that the proposed approach can perform hypothesis testing with satisfying actual size even at small sample sizes. Overall, it is superior to other existing methods. Also, a CAT is proposed for testing about reliability of two log-normal populations when the means are the same. Simulations show that the actual size of this new approach is close to nominal level and better than the score test. At the end, the proposed methods are illustrated using two examples. 相似文献
33.
34.
35.
Feminist and empowerment theories are especially important to the understanding of individual and sociopolitical levels of social work assessment and intervention. Incorporating feminist and empowerment approaches in practice will provide social workers with the knowledge, values and skills most likely to promote human rights and social justice. In this paper, we present an overview of both theories and illustrate them with a case example. 相似文献
36.
37.
Cancho Vicente G. Macera Márcia A. C. Suzuki Adriano K. Louzada Francisco Zavaleta Katherine E. C. 《Lifetime data analysis》2020,26(2):221-244
Lifetime Data Analysis - Frailty models are generally used to model heterogeneity between the individuals. The distribution of the frailty variable is often assumed to be continuous. However, there... 相似文献
38.
AbstractThe economic mobility of individuals and households is of fundamental interest. While many measures of economic mobility exist, reliance on transition matrices remains pervasive due to simplicity and ease of interpretation. However, estimation of transition matrices is complicated by the well-acknowledged problem of measurement error in self-reported and even administrative data. Existing methods of addressing measurement error are complex, rely on numerous strong assumptions, and often require data from more than two periods. In this article, we investigate what can be learned about economic mobility as measured via transition matrices while formally accounting for measurement error in a reasonably transparent manner. To do so, we develop a nonparametric partial identification approach to bound transition probabilities under various assumptions on the measurement error and mobility processes. This approach is applied to panel data from the United States to explore short-run mobility before and after the Great Recession. 相似文献
39.
由于长期注水开发和层间非均质性影响,高含水期油藏各小层层间压力结构差异严重,掌握差异状况是合理调整的重要依据。针对现场分层测压资料少,单层压力资料获取困难的情况,应用渗流力学原理建立了高含水期地层层间压力结构差异量化数学模型,模型的关键参数可以通过生产数据计算获得。枣园油田的实例验证表明,高含水油藏层间压力存在明显差异,该方法能够确定各小层的压力差异状况。量化计算结果和实测资料相接近,有利于认清开发矛盾,为合理调整提供技术依据。 相似文献
40.