全文获取类型
收费全文 | 671篇 |
免费 | 5篇 |
国内免费 | 1篇 |
专业分类
管理学 | 44篇 |
民族学 | 2篇 |
人口学 | 4篇 |
丛书文集 | 22篇 |
理论方法论 | 19篇 |
综合类 | 187篇 |
社会学 | 4篇 |
统计学 | 395篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 6篇 |
2019年 | 19篇 |
2018年 | 30篇 |
2017年 | 41篇 |
2016年 | 9篇 |
2015年 | 6篇 |
2014年 | 23篇 |
2013年 | 157篇 |
2012年 | 29篇 |
2011年 | 21篇 |
2010年 | 25篇 |
2009年 | 21篇 |
2008年 | 25篇 |
2007年 | 19篇 |
2006年 | 19篇 |
2005年 | 16篇 |
2004年 | 22篇 |
2003年 | 11篇 |
2002年 | 17篇 |
2001年 | 20篇 |
2000年 | 18篇 |
1999年 | 19篇 |
1998年 | 11篇 |
1997年 | 13篇 |
1996年 | 12篇 |
1995年 | 7篇 |
1994年 | 9篇 |
1993年 | 9篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1981年 | 4篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
排序方式: 共有677条查询结果,搜索用时 16 毫秒
61.
W. Y. Tan 《Revue canadienne de statistique》1977,5(2):241-250
This paper provides necessary and sufficient conditions for a quadratic form in singular normal random variables to be distributed as a given linear combination of independent noncentral chi-square variables. Using this result, an extension of Cochran's theorem to quadratic forms of noncentral chi-square variables is derived. 相似文献
62.
提供了另一种求解积分方程的方法。利用 Hilbert 空间来研究 Fredholm 积分算子,并证明了可利用一组标准正交基将 Fredholn 积分算子展开,从而使积分方程得到简化。应用这一方法给出了一般第二类 Fredholm 积分方程的严格解析解。文中还对具体积分方程进行了求解并与严格解和其它方法所得的解进行了比较,结果吻合得很好。 相似文献
63.
Alessandro Citanna Paolo Siconolfi 《Econometrica : journal of the Econometric Society》2010,78(1):309-347
We prove the generic existence of a recursive equilibrium for overlapping‐generations economies with uncertainty. “Generic” here means in a residual set of utilities and endowments. The result holds provided there is a sufficient number of potentially different individuals within each cohort. 相似文献
64.
陈建国 《佛山科学技术学院学报(社会科学版)》2014,(6):12-14
严格分析四色定理成立的条件,即可以用简洁方法证明四色定理。这一证明对于认识论和思维科学研究有重要意义。 相似文献
65.
研究一类三阶非线性中立型阻尼泛函微分方程,利用Riccati变换和积分平均技巧,建立了保证该类方程的一切解振动或者收敛于零的若干新的充分条件,推广和改进最近文献的结果. 相似文献
66.
Tucker McElroy 《统计学通讯:理论与方法》2013,42(4):591-616
The problem of choosing the loss function in the Bayesian problem of many hypotheses testing is considered. It is shown that linear and quadratic loss functions are the most-used ones. For any kind of loss function, the risk function in the Bayesian problem of many hypotheses testing contains the errors of two kinds. The Bayesian decision rule minimizes the total effect of these errors. The share of each of them in the optimal value of risk function is unknown. When solving many important problems, the results caused by different errors significantly differ from each other. Therefore, it is necessary to guarantee the limitation on the most undesirable kind of these errors and to minimize the errors of the second kind. For solving these problems, this article are states and solves conditional Bayesian tasks of testing many hypotheses. The results of sensitivity analysis of the classical and conditional Bayesian problems are given and their advantages and drawbacks are considered. 相似文献
67.
In this article, we present a goodness-of-fit test for a distribution based on some comparisons between the empirical characteristic function cn(t) and the characteristic function of a random variable under the simple null hypothesis, c0(t). We do this by introducing a suitable distance measure. Empirical critical values for the new test statistic for testing normality are computed. In addition, the new test is compared via simulation to other omnibus tests for normality and it is shown that this new test is more powerful than others. 相似文献
68.
In addition to the distribution function, the mean residual life (MRL) function is the other important function which can be used to characterize a lifetime in survival analysis and reliability. For inference on the MRL function, some procedures have been proposed in the literature. However, the coverage accuracy of such procedures may be low when the sample size is small. In this article, an empirical likelihood (EL) inference procedure of MRL function is proposed and the limiting distribution of the EL ratio for MRL function is derived. Based on the result, we obtain confidence interval/band for the MRL function. The proposed method is compared with the normal approximation based method through simulation study in terms of coverage probability. 相似文献
69.
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
70.
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