全文获取类型
收费全文 | 2544篇 |
免费 | 83篇 |
国内免费 | 21篇 |
专业分类
管理学 | 289篇 |
民族学 | 42篇 |
人口学 | 38篇 |
丛书文集 | 155篇 |
理论方法论 | 137篇 |
综合类 | 1180篇 |
社会学 | 245篇 |
统计学 | 562篇 |
出版年
2024年 | 3篇 |
2023年 | 19篇 |
2022年 | 23篇 |
2021年 | 21篇 |
2020年 | 57篇 |
2019年 | 67篇 |
2018年 | 71篇 |
2017年 | 117篇 |
2016年 | 111篇 |
2015年 | 101篇 |
2014年 | 89篇 |
2013年 | 370篇 |
2012年 | 196篇 |
2011年 | 108篇 |
2010年 | 75篇 |
2009年 | 75篇 |
2008年 | 105篇 |
2007年 | 148篇 |
2006年 | 151篇 |
2005年 | 128篇 |
2004年 | 96篇 |
2003年 | 91篇 |
2002年 | 71篇 |
2001年 | 62篇 |
2000年 | 46篇 |
1999年 | 44篇 |
1998年 | 26篇 |
1997年 | 27篇 |
1996年 | 28篇 |
1995年 | 23篇 |
1994年 | 23篇 |
1993年 | 9篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 10篇 |
1989年 | 7篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 5篇 |
1983年 | 6篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1980年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有2648条查询结果,搜索用时 125 毫秒
971.
P.M. Kulkarni 《统计学通讯:理论与方法》2013,42(8):2829-2845
Robust analogue of Durbin's(1970)statistic is derived and its limiting distribution is obtained under both null and alternative hypotheses. Also, robust version of the portmanteau goodness-of-fit test statistic for AR(p)model is given and the asymptotic distribution is derived. 相似文献
972.
Two stage sampling schemes are introduced for use in estimating the common location parameter (guarantee time) of two or more exponential distributions with a confidence interval of prespecified width whose coverage probability is at least a given nominal value. Exact expressions for all moments of order r ≥ 1 of the associated two stage sample sizes and for the actual coverage probabilities are derived. The performance of the procedures in a variety of two population, moderate fixed sample size cases is examined via numerical studies involving both exact calculations and Monte Carlo simulations. No new tables are needed to implement any of the proposed methods. A modified two stage procedure is recommended for practical use 相似文献
973.
《统计学通讯:理论与方法》2013,42(10):2117-2133
This paper introduces a nonparametric test of symmetry for ranked-set samples to test the asymmetry of the underlying distribution. The test statistic is constructed from the Cramér-von Mises distance function which measures the distance between two probability models. The null distribution of the test statistic is established by constructing symmetric bootstrap samples from a given ranked-set sample. It is shown that the type I error probabilities are stable across all practical symmetric distributions and the test has high power for asymmetric distributions. 相似文献
974.
《统计学通讯:理论与方法》2013,42(11):2197-2208
ABSTRACT In this article, we consider an Erlang(2) risk process perturbed by diffusion. From the extreme value distribution of Brownian motion with drift and the renewal theory, we show that the survival probability satisfies an integral equation. We then give the bounds for the ultimate ruin probability and the ruin probability caused by claim. By introducing a random walk associated with the proposed risk process, we define an adjustment-coefficient. The relation between the adjustment-coefficient and the bound is given and the Lundberg-type inequality for the bound is obtained. Also, a formula of Pollaczek–Khinchin type for the bound is derived. Using these results, the bound can be calculated when claim sizes are exponentially distributed. 相似文献
975.
《统计学通讯:理论与方法》2013,42(9):1665-1673
ABSTRACT It is an increasingly common practice to monitor several related quality characteristics of a product or process using a multivariate control chart procedure. Several types of multivariate control charts, including Hotelling's χ 2 and T 2 control charts, have been developed in attempts to improve monitoring by using the correlation structure that exists between quality characteristics. The purpose of this paper is to summarize the assumptions made regarding the out-of-control process shift in the economic design of multivariate control charts and to address their consequences. We study the average run length (ARL) properties of the χ 2 control chart using a numerical example and show that this chart can perform ineffectively under the assumed out-of-control conditions when designed using the economic approach. Following Healy,[1] we offer an alternative procedure that has improved ARL properties and overall performance. These results can be important to researchers and practitioners who are interested in using the economic design of multivariate control procedures. 相似文献
976.
Takahiro Nishiyama Masashi Hyodo Takashi Seo Tatjana Pavlenko 《Journal of statistical planning and inference》2013
We propose a new test procedure for testing linear hypothesis on the mean vectors of normal populations with unequal covariance matrices when the dimensionality, p exceeds the sample size N , i.e. p/N→c<∞. Our procedure is based on the Dempster trace criterion and is shown to be consistent in high dimensions. 相似文献
977.
The effect of influental observation son the parameter estimates of ordinary least squares regression models has received considerable a t t e n t i o n fn the last decade. However, very little attention has been given to the problem of influential observation sinthea naysis of variace . The purpose of this paper is to show by way of examples that in fluential observations can alter the conclusions of tests of hypotheses in the analysis of variance . Regression diagno stics for identifying both extreme points and out liers can be used toreveal potential data and design problems. 相似文献
978.
We derive the ?1-limit of trimmed sums of order statistics from location-scale distributions satisfying certain assumptions. Based on this limit, an approximation to the asymptotic variance of a Best-Asymptotic-Normal (BAN) estimator for the location parameter is developed. Associated formulae are derived for four location-scale distributions commonly used in lifetime data analysis. The approximation is analyzed via the properties of the approximating function and by comparison to the exact values for a special case. Applications are illustrated by applying the approximation to comparing location parameters and to selecting the population with the largest location parameter, using censored samples from location-scale populations. 相似文献
979.
Random coefficient AR(1) processes are investigated where the random coefficient satisfies some suitable conditions. Conditional least squares estimator is shown to be consistent and to be asymptotically normality distributed. This extends the limit theory for stationary and near-stationary cases. Only second moments are assumed, as in the case of stationary autoregression models with fixed coefficient |ρ| < 1. 相似文献
980.
William J. Reed 《统计学通讯:理论与方法》2013,42(20):3692-3703
A simple adjustment to parametric failure-time distributions, which allows for much greater flexibility in the shape of the hazard-rate function, is considered. Analytical expressions for the distributions of the power-law adjusted Weibull, gamma, log-gamma, generalized gamma, lognormal, and Pareto distributions are given. Most of these allow for bathtub-shaped and other multi-modal forms of the hazard rate. The new distributions are fitted to real failure-time data which exhibit a multi-modal hazard-rate function and the fits are compared. 相似文献