全文获取类型
收费全文 | 2188篇 |
免费 | 53篇 |
国内免费 | 24篇 |
专业分类
管理学 | 184篇 |
民族学 | 8篇 |
人口学 | 24篇 |
丛书文集 | 108篇 |
理论方法论 | 64篇 |
综合类 | 1330篇 |
社会学 | 72篇 |
统计学 | 475篇 |
出版年
2024年 | 4篇 |
2023年 | 14篇 |
2022年 | 18篇 |
2021年 | 22篇 |
2020年 | 31篇 |
2019年 | 51篇 |
2018年 | 63篇 |
2017年 | 91篇 |
2016年 | 68篇 |
2015年 | 64篇 |
2014年 | 131篇 |
2013年 | 251篇 |
2012年 | 167篇 |
2011年 | 176篇 |
2010年 | 127篇 |
2009年 | 111篇 |
2008年 | 125篇 |
2007年 | 108篇 |
2006年 | 93篇 |
2005年 | 70篇 |
2004年 | 56篇 |
2003年 | 31篇 |
2002年 | 44篇 |
2001年 | 56篇 |
2000年 | 42篇 |
1999年 | 38篇 |
1998年 | 26篇 |
1997年 | 27篇 |
1996年 | 23篇 |
1995年 | 18篇 |
1994年 | 18篇 |
1993年 | 22篇 |
1992年 | 17篇 |
1991年 | 11篇 |
1990年 | 7篇 |
1989年 | 11篇 |
1988年 | 9篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 3篇 |
1981年 | 5篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
排序方式: 共有2265条查询结果,搜索用时 453 毫秒
281.
Joseph Ngatchou-Wandji 《统计学通讯:理论与方法》2013,42(9):1465-1485
Using the empirical characteristic function, we derive a Cramér-von Mises test for symmetry of the error distribution in a class of nonlinear parametric heteroscedastic models. We study the convergence of the residual-based empirical distribution function. We establish a functional limit theorem for an empirical process of residuals, and investigate the asymptotic null distribution function of our test statistic. A simulation experiment is conducted to evaluate small-sample performances of our test. 相似文献
282.
In this article, we investigate the limitations of traditional quantile function estimators and introduce a new class of quantile function estimators, namely, the semi-parametric tail-extrapolated quantile estimators, which has excellent performance for estimating the extreme tails with finite sample sizes. The smoothed bootstrap and direct density estimation via the characteristic function methods are developed for the estimation of confidence intervals. Through a comprehensive simulation study to compare the confidence interval estimations of various quantile estimators, we discuss the preferred quantile estimator in conjunction with the confidence interval estimation method to use under different circumstances. Data examples are given to illustrate the superiority of the semi-parametric tail-extrapolated quantile estimators. The new class of quantile estimators is obtained by slight modification of traditional quantile estimators, and therefore, should be specifically appealing to researchers in estimating the extreme tails. 相似文献
283.
284.
AbstractThis paper is devoted to attain multiple objects via proposing two compound optimality criteria constructed with A-optimality criterion. The offered compound criteria are ADP-optimality to seek about an optimal design for minimizing the average variance, having an efficient parameter estimates, likewise, maximizing the probability of a particular event and AKL-optimality that provides an identified balance between model discrimination and minimizing the average variance of the parameter estimates. The equivalence theorems are stated and proved. Finally, a numerical example is applied on probit GLMs to illustrate the results for both compound criteria. 相似文献
285.
Jeffrey D. Hart 《统计学通讯:理论与方法》2013,42(12):2943-2945
P. Ghosh (1981) has claimed that the convolution of two symmetric multimodal distributions is symmetric and unimodal. A simple counterexample to this claim is constructed by considering the convolution f?f, where f is an appropriate mixture of two normal densities. 相似文献
286.
James C. Spall 《统计学通讯:理论与方法》2013,42(12):3747-3762
An approximation is presented that can be used to gain insight into the characteristics – such as outlier sensitivity, bias, and variability – of a wide class of estimators, including maximum likelihood and least squares. The approximation relies on a convenient form for an arbitrary order Taylor expansion in a multivariate setting. The implicit function theorem can be used to construct the expansion when the estimator is not defined in closed form. We present several finite-sample and asymptotic properties of such Taylor expansions, which are useful in characterizing the difference between the estimator and the expansion. 相似文献
287.
Jian Zhang 《统计学通讯:理论与方法》2013,42(6):1185-1198
In this paper, relying on the sample breakdown points, we investigate the sample breakdown properties of some nonparametric tests. It is shown that the sample breakdown points of the sign test asymptotically dominate those of the Wilcoxon test for one–sided hypotheses, However, the different conclusion is derived in the case of testing some shrinking neighborhood hypotheses. The breakdown behaviors of the Kolmogorov test and X2–test are also explored. These studies unify or refine some existing breakdown analyses of tests. 相似文献
288.
《统计学通讯:理论与方法》2013,42(11):2393-2414
In this paper, properties of minimum point of a unbalanced two-sided random walk are investigated. Under the condition that the parameters at both sides tend to zero at the same order, probabilities that the minimum point is on which side, and the second order expansions for the first two moments of the minimum point are obtained. Applications of these results are very promising. First, they can be used to study the properties of the maximum likelihood estimator for the change point in the large sample case; second, they can be used to study inference problems after CUSUM test. 相似文献
289.
290.
This paper focuses on a novel method of developing one-sample confidence bands for survival functions from right censored data. The approach is model-based, relying on a parametric model for the conditional expectation of the censoring indicator given the observed minimum, and derives its strength from easy access to a good-fitting model among a plethora of choices available for binary response data. The substantive methodological contribution is in exploiting a semiparametric estimator of the survival function to produce improved simultaneous confidence bands. To obtain critical values for computing the confidence bands, a two-stage bootstrap approach that combines the classical bootstrap with the more recent model-based regeneration of censoring indicators is proposed and a justification of its asymptotic validity is also provided. Several different confidence bands are studied using the proposed approach. Numerical studies, including robustness of the proposed bands to misspecification, are carried out to check efficacy. The method is illustrated using two lung cancer data sets. 相似文献