全文获取类型
收费全文 | 78篇 |
免费 | 2篇 |
专业分类
管理学 | 7篇 |
人口学 | 8篇 |
丛书文集 | 2篇 |
理论方法论 | 6篇 |
综合类 | 3篇 |
社会学 | 30篇 |
统计学 | 24篇 |
出版年
2022年 | 1篇 |
2020年 | 7篇 |
2019年 | 4篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2013年 | 15篇 |
2012年 | 4篇 |
2011年 | 2篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 1篇 |
2007年 | 3篇 |
2006年 | 1篇 |
2005年 | 5篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1976年 | 1篇 |
1975年 | 2篇 |
排序方式: 共有80条查询结果,搜索用时 15 毫秒
1.
This paper proposes a new factor rotation for the context of functional principal components analysis. This rotation seeks to re-express a functional subspace in terms of directions of decreasing smoothness as represented by a generalized smoothing metric. The rotation can be implemented simply and we show on two examples that this rotation can improve the interpretability of the leading components. 相似文献
2.
Statistics and Computing - In this paper, we develop a very efficient approach to the Monte Carlo estimation of the expected value of partial perfect information (EVPPI) that measures the average... 相似文献
3.
4.
5.
Tyrer Paul; Chase Elaine; Warwick Ian; Aggleton Peter 《British Journal of Social Work》2005,35(7):1107-1121
The interface between two major UK Government prioritiesreducingunwanted teenage pregnancies and supporting teenage parents,and improving the health and well-being of young people in andleaving local authority carehas been the focus of recentresearch. The overall aims of this study were to explore factorscontributing to early pregnancy and parenthood among young peoplein and leaving local authority care; to determine the kindsof support available to these young people; and to identifywhat enables or prevents the delivery of the support they need.Via in-depth interviews, and in four contrasting geographicalareas, data were collected from young people and service providersacross England. This paper analyses data of relevance to theexperience of young fathers who have been looked aftertoconsider how the needs of these young men might be better addressedthrough policy and practice. In-depth interviews conducted withyoung fathers and service providers highlighted three key aspectsof their experience that must be addressed if future needs areto be better provided for. These are: social exclusion, trustand more flexible forms of service provision. The implicationsof these issues for future policy and programme developmentare discussed. 相似文献
6.
The Lomax (Pareto II) distribution has found wide application in a variety of fields. We analyze the second-order bias of the maximum likelihood estimators of its parameters for finite sample sizes, and show that this bias is positive. We derive an analytic bias correction which reduces the percentage bias of these estimators by one or two orders of magnitude, while simultaneously reducing relative mean squared error. Our simulations show that this performance is very similar to that of a parametric bootstrap correction based on a linear bias function. Three examples with actual data illustrate the application of our bias correction. 相似文献
7.
8.
9.
We examine the risk of a pre-test estimator for regression coefficients after a pre-test for homoskedasticity under the Balanced Loss Function (BLF). We show analytically that the two stage Aitken estimator is dominated by the pre-test estimator with the critical value of unity, even if the BLF is used. We also show numerically that both the two stage Aitken estimator and the pre-test estimator can be dominated by the ordinary least squares estimator when “goodness of fit” is regarded as more important than precision of estimation. 相似文献
10.
Michael B. Giles Mateusz B. Majka Lukasz Szpruch Sebastian J. Vollmer Konstantinos C. Zygalakis 《Statistics and Computing》2020,30(3):507-524
We develop a framework that allows the use of the multi-level Monte Carlo (MLMC) methodology (Giles in Acta Numer. 24:259–328, 2015. https://doi.org/10.1017/S096249291500001X) to calculate expectations with respect to the invariant measure of an ergodic SDE. In that context, we study the (over-damped) Langevin equations with a strongly concave potential. We show that when appropriate contracting couplings for the numerical integrators are available, one can obtain a uniform-in-time estimate of the MLMC variance in contrast to the majority of the results in the MLMC literature. As a consequence, a root mean square error of $$\mathcal {O}(\varepsilon )$$ is achieved with $$\mathcal {O}(\varepsilon ^{-2})$$ complexity on par with Markov Chain Monte Carlo (MCMC) methods, which, however, can be computationally intensive when applied to large datasets. Finally, we present a multi-level version of the recently introduced stochastic gradient Langevin dynamics method (Welling and Teh, in: Proceedings of the 28th ICML, 2011) built for large datasets applications. We show that this is the first stochastic gradient MCMC method with complexity $$\mathcal {O}(\varepsilon ^{-2}|\log {\varepsilon }|^{3})$$, in contrast to the complexity $$\mathcal {O}(\varepsilon ^{-3})$$ of currently available methods. Numerical experiments confirm our theoretical findings. 相似文献