全文获取类型
收费全文 | 368篇 |
免费 | 22篇 |
专业分类
管理学 | 30篇 |
民族学 | 2篇 |
人口学 | 38篇 |
理论方法论 | 67篇 |
综合类 | 1篇 |
社会学 | 221篇 |
统计学 | 31篇 |
出版年
2023年 | 6篇 |
2022年 | 1篇 |
2021年 | 4篇 |
2020年 | 17篇 |
2019年 | 17篇 |
2018年 | 19篇 |
2017年 | 24篇 |
2016年 | 16篇 |
2015年 | 16篇 |
2014年 | 19篇 |
2013年 | 77篇 |
2012年 | 11篇 |
2011年 | 17篇 |
2010年 | 12篇 |
2009年 | 12篇 |
2008年 | 15篇 |
2007年 | 8篇 |
2006年 | 12篇 |
2005年 | 10篇 |
2004年 | 10篇 |
2003年 | 3篇 |
2002年 | 6篇 |
2001年 | 9篇 |
2000年 | 3篇 |
1999年 | 5篇 |
1998年 | 6篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 6篇 |
1988年 | 2篇 |
1982年 | 1篇 |
1981年 | 3篇 |
1975年 | 2篇 |
1971年 | 1篇 |
排序方式: 共有390条查询结果,搜索用时 640 毫秒
41.
42.
43.
44.
45.
The Dirichlet process prior allows flexible nonparametric mixture modeling. The number of mixture components is not specified
in advance and can grow as new data arrive. However, analyses based on the Dirichlet process prior are sensitive to the choice
of the parameters, including an infinite-dimensional distributional parameter G
0. Most previous applications have either fixed G
0 as a member of a parametric family or treated G
0 in a Bayesian fashion, using parametric prior specifications. In contrast, we have developed an adaptive nonparametric method
for constructing smooth estimates of G
0. We combine this method with a technique for estimating α, the other Dirichlet process parameter, that is inspired by an
existing characterization of its maximum-likelihood estimator. Together, these estimation procedures yield a flexible empirical
Bayes treatment of Dirichlet process mixtures. Such a treatment is useful in situations where smooth point estimates of G
0 are of intrinsic interest, or where the structure of G
0 cannot be conveniently modeled with the usual parametric prior families. Analysis of simulated and real-world datasets illustrates
the robustness of this approach. 相似文献
46.
Despite the simplicity of the Bernoulli process, developing good confidence interval procedures for its parameter—the probability of success p—is deceptively difficult. The binary data yield a discrete number of successes from a discrete number of trials, n. This discreteness results in actual coverage probabilities that oscillate with the n for fixed values of p (and with p for fixed n). Moreover, this oscillation necessitates a large sample size to guarantee a good coverage probability when p is close to 0 or 1. It is well known that the Wilson procedure is superior to many existing procedures because it is less sensitive to p than any other procedures, therefore it is less costly. The procedures proposed in this article work as well as the Wilson procedure when 0.1 ≤p ≤ 0.9, and are even less sensitive (i.e., more robust) than the Wilson procedure when p is close to 0 or 1. Specifically, when the nominal coverage probability is 0.95, the Wilson procedure requires a sample size 1, 021 to guarantee that the coverage probabilities stay above 0.92 for any 0.001 ≤ min {p, 1 ?p} <0.01. By contrast, our procedures guarantee the same coverage probabilities but only need a sample size 177 without increasing either the expected interval width or the standard deviation of the interval width. 相似文献
47.
48.
The absence of violence against children is a fundamental children's right and a major milestone of civilized society. Similarly, reports on incidences of violence by children and youth, including severe cases with devastating consequences, speak to the need that the trauma of exposure to violence in childhood needs to be addressed. While violence and its risk factors are generally understood, what is less clear are the essential protective factors, how we can identify those as early as possible, and how we can use them to prevent and address the trauma of violence exposure in children and youth. In this report, I review pathways of child and youth violence through the lens of social-emotional development as a central protective factor. Negative emotions of frustration and anger can underlie violence and aggression. Kind emotions, such as caring and our ability to connect with others emotionally, can serve as social-emotional protective factors. A brief review of the central social-emotional processes and their development is provided, including the human capacity to feel with others and express empathy, be emotionally aware and care about the effects of one's own actions on others, and be able to regulate the self and their emotions. Given the negative widespread and long-term impact of exposure to violence, I describe research-informed attempts to prevent violence exposure across development. Taking a humanistic, strength-based perspective, the focus is on social-emotional protective factors to address violence and nurture mental health in every child. I conclude with recommendations for practice and policy. 相似文献
49.
Tina E. Wilson 《Social Work Education》2020,39(5):572-583
ABSTRACT This paper is about the changing imaginations of social work in an increasingly entangled world. It is also about the ways in which literatures shared across time and space encourage us to identify with larger collectivities. My central argument is that if social work is to find a larger vision in the wake of the failure of a range of modern progress narratives, we must engage differently with the challenge posed by multiplying and sometimes conflicting knowledge communities. Thinking with contemporary debates in transdisciplinary critical social theory, I nominate and explore a number of alternative heuristics—‘generational problematic,’ ‘translational space,’ and ‘imagined communities’—in support of future work on the uneven temporal and spatial communities of affiliation that reproduce and change what social work is, or could be, about. I conclude with theoretical suggestions, and some thoughts toward how social work education might better support incoming generations to locate themselves within the broader life-course of the discipline and profession. 相似文献
50.
Urban Ecosystems - Urbanization may negatively affect forest obligate bat species. We compared the roosting behavior of federally endangered Indiana bats (Myotis sodalis) in a fragmented site,... 相似文献