全文获取类型
收费全文 | 247篇 |
免费 | 5篇 |
专业分类
管理学 | 7篇 |
民族学 | 1篇 |
人口学 | 7篇 |
丛书文集 | 7篇 |
理论方法论 | 4篇 |
综合类 | 38篇 |
社会学 | 22篇 |
统计学 | 166篇 |
出版年
2021年 | 3篇 |
2020年 | 1篇 |
2019年 | 4篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 39篇 |
2012年 | 6篇 |
2011年 | 11篇 |
2010年 | 11篇 |
2009年 | 7篇 |
2008年 | 10篇 |
2007年 | 11篇 |
2006年 | 2篇 |
2005年 | 4篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 3篇 |
2000年 | 3篇 |
1998年 | 1篇 |
1994年 | 1篇 |
1988年 | 3篇 |
1986年 | 1篇 |
1985年 | 20篇 |
1984年 | 20篇 |
1983年 | 15篇 |
1982年 | 21篇 |
1981年 | 12篇 |
1980年 | 13篇 |
1979年 | 11篇 |
排序方式: 共有252条查询结果,搜索用时 312 毫秒
141.
N. Gaffke 《Journal of statistical planning and inference》1982,6(2):183-200
For given positive integers v, b, and k (all of them ≥2) a block design is a k × b array of the variety labels 1,…,v with blocks as columns. For the usual one-way heterogeneity model in standard form the problem is studied of finding a D-optimal block design for estimating the variety contrasts, when no balanced block design (BBD) exists. The paper presents solutions to this problem for v≤6. The results on D-optimality are derived from a graph-theoretic context. Block designs can be considered as multigraphs, and a block design is D-optimal iff its multigraph has greatest complexity (=number of spanning trees). 相似文献
142.
Dankmar Böhning 《Journal of statistical planning and inference》1985,11(1):57-69
An iterative solution to the problem of maximizing a concave functional ø defined on the set of all probability measures on a topological space is considered. Convergence of this procedure and a rapidly converging algorithm are studied. Computational aspects of this algorithm along with the ones developed earlier by Wynn, Fedorov, Atwood, Wu and others are provided. Examples discussed are taken from the area of mixture likehoods and optimal experimental design. 相似文献
143.
T. Timothy Chen Yosef Hochberg Aaron Tenenbein 《Journal of statistical planning and inference》1984,9(2):177-184
Previous work has been carried out on the use of double-sampling schemes for inference from categorical data subject to misclassification. The double-sampling schemes utilize a sample of n units classified by both a fallible and true device and another sample of n2 units classified only by a fallible device. In actual applications, one often hasavailable a third sample of n1 units, which is classified only by the true device. In this article we develop techniques of fitting log-linear models under various misclassification structures for a general triple-sampling scheme. The estimation is by maximum likelihood and the fitted models are hierarchical. The methodology is illustrated by applying it to data in traffic safety research from a study on the effectiveness of belts in reducing injuries. 相似文献
144.
Families of Repeated Measurements Designs balanced for residual effects are constructed (whenever the divisibility conditions allow), under the assumption that the number of periods is less than the number of treatments and that each treatment precedes each other treatment once. These designs are then shown to be connected for both residual and direct treatment effects. 相似文献
145.
In this paper we seek designs and estimators which are optimal in some sense for multivariate linear regression on cubes and simplexes when the true regression function is unknown. More precisely, we assume that the unknown true regression function is the sum of a linear part plus some contamination orthogonal to the set of all linear functions in the L2 norm with respect to Lebesgue measure. The contamination is assumed bounded in absolute value and it is shown that the usual designs for multivariate linear regression on cubes and simplices and the usual least squares estimators minimize the supremum over all possible contaminations of the expected mean square error. Additional results for extrapolation and interpolation, among other things, are discussed. For suitable loss functions optimal designs are found to have support on the extreme points of our design space. 相似文献
146.
A linear model with one treatment at V levels and first order regression on K continuous covariates with values on a K-cube is considered. We restrict our attention to classes of designs d for which the number of observations N to be taken is a multiple of V, i.e. N = V × R with R ≥2, and each treatment level is observed R times. Among these designs, called here equireplicated, there is a subclass characterized by the following: the allocation matrix of each treatment level (for short, allocation matrix) is obtained through cyclic permutation of the columns of the allocation matrix of the first treatment level. We call these designs cyclic. Besides having easy representation, the most efficient cyclic designs are often D-optimal in the class of equireplicated designs. A known upper bound for the determinant of the information matrix M(d) of a design, in the class of equireplicated ones, depends on the congruences of N and V modulo 4. For some combinations of parameter moduli, we give here methods of constructing families of D-optimal cyclic designs. Moreover, for some sets of parameters (N, V,K = V), where the upper bound on ∣M(d)∣ (for that specific combination of moduli) is not attainable, it is also possible to construct highly D-efficient cyclic designs. Finally, for N≤24 and V≤6, computer search was used to determine the most efficient design in the class of cyclic ones. They are presented, together with their respective efficiency in the class of equireplicated designs. 相似文献
147.
Ibrahim A. Ahmad 《Journal of statistical planning and inference》1983,7(3):195-207
An estimate of the mean residual life function of a complex system of k independent identically distributed components is proposed and studied with emphasis being on the order of normal approximation. 相似文献
148.
In this paper we consider the more realistic aspect of accelerated life testing wherein the stress on an unfailed item is allowed to increase at a preassigned test time. Such tests are known as step-stress tests. Our approach is nonparametric in that we do not make any assumptions about the underlying distribution of life lengths. We introduce a model for step-stress testing which is based on the ideas of shock models and of wear processes. This model unifies and generalizes two previously proposed models for step-stress testing. We propose an estimator for the life distribution under use conditions stress and show that this estimator is strongly consistent. 相似文献
149.
M.A. Chmielewski 《Journal of statistical planning and inference》1981,5(4):341-346
We consider tests for scale parameters when the underlying distribution belongs to the class of spherically symmetric laws. A (nx1) random vector x has a spherically symmetric distribution if the distribution of x is identical to the distribution of Px for all (n×n) orthogonal matrices P. Using the principle of invariance we show that the usual normal-theory tests are not only invariant tests but are also exactly robust with respect to this class of spherically symmetric laws. 相似文献
150.
Subir Ghosh 《Journal of statistical planning and inference》1981,5(4):381-389
In this paper, we obtain search designs with reasonably small number of treatments which permit the estimation of the general mean and main effects and search of one more unknown possible nonzero effect among two and three factor interactions in 2m factorial experiments, 3 ? m ? 8. 相似文献