全文获取类型
收费全文 | 3270篇 |
免费 | 79篇 |
国内免费 | 22篇 |
专业分类
管理学 | 522篇 |
民族学 | 4篇 |
人才学 | 1篇 |
人口学 | 19篇 |
丛书文集 | 50篇 |
理论方法论 | 23篇 |
综合类 | 696篇 |
社会学 | 48篇 |
统计学 | 2008篇 |
出版年
2024年 | 2篇 |
2023年 | 13篇 |
2022年 | 20篇 |
2021年 | 30篇 |
2020年 | 39篇 |
2019年 | 86篇 |
2018年 | 82篇 |
2017年 | 195篇 |
2016年 | 96篇 |
2015年 | 122篇 |
2014年 | 95篇 |
2013年 | 763篇 |
2012年 | 213篇 |
2011年 | 119篇 |
2010年 | 99篇 |
2009年 | 123篇 |
2008年 | 147篇 |
2007年 | 105篇 |
2006年 | 119篇 |
2005年 | 108篇 |
2004年 | 89篇 |
2003年 | 79篇 |
2002年 | 99篇 |
2001年 | 75篇 |
2000年 | 63篇 |
1999年 | 61篇 |
1998年 | 48篇 |
1997年 | 36篇 |
1996年 | 35篇 |
1995年 | 34篇 |
1994年 | 30篇 |
1993年 | 21篇 |
1992年 | 24篇 |
1991年 | 16篇 |
1990年 | 13篇 |
1989年 | 10篇 |
1988年 | 12篇 |
1987年 | 10篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 8篇 |
1983年 | 8篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 4篇 |
1978年 | 1篇 |
1977年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有3371条查询结果,搜索用时 31 毫秒
991.
Innocent Ngaruye Joseph Nzabanita Dietrich von Rosen Martin Singull 《统计学通讯:理论与方法》2017,46(21):10835-10850
In this article, small area estimation under a multivariate linear model for repeated measures data is considered. The proposed model aims to get a model which borrows strength both across small areas and over time. The model accounts for repeated surveys, grouped response units, and random effects variations. Estimation of model parameters is discussed within a likelihood based approach. Prediction of random effects, small area means across time points, and per group units are derived. A parametric bootstrap method is proposed for estimating the mean squared error of the predicted small area means. Results are supported by a simulation study. 相似文献
992.
In this paper, we study the asymptotic properties of the adaptive Lasso estimators in high-dimensional generalized linear models. The consistency of the adaptive Lasso estimator is obtained. We show that, if a reasonable initial estimator is available, under appropriate conditions, the adaptive Lasso correctly selects covariates with non zero coefficients with probability converging to one, and that the estimators of non zero coefficients have the same asymptotic distribution they would have if the zero coefficients were known in advance. Thus, the adaptive Lasso has an Oracle property. The results are examined by some simulations and a real example. 相似文献
993.
非寿险业务中的损失数据结构日益复杂,呈现异质性与相关性并存的异象。分层广义线性模型能够突破传统费率厘定精算方法仅分析风险个体同一保单年损失数据的局限,可以提高复杂结构损失数据预测的准确性。基于分层广义线性模型等方法,研究具有多年损失数据的非寿险费率厘定问题,并以车险和工伤补偿保险的两组损失数据为例进行实证分析。研究结果表明,相对于GLM而言,考虑随机效应后GLMM的拟合优度大幅改善,GLMM与HGLM可以更有效地反映不同风险个体的差异,并有利于揭示风险个体在多个保险期内损失的异质性与相关性。 相似文献
994.
The statistical methods for analyzing spatial count data have often been based on random fields so that a latent variable can be used to specify the spatial dependence. In this article, we introduce two frequentist approaches for estimating the parameters of model-based spatial count variables. The comparison has been carried out by a simulation study. The performance is also evaluated using a real dataset and also by the simulation study. The simulation results show that the maximum likelihood estimator appears to be with the better sampling properties. 相似文献
995.
In this paper, we consider the choice of pilot estimators for the single-index varying-coefficient model, which may result in radically different estimators, and develop the method for estimating the unknown parameter in this model. To estimate the unknown parameters efficiently, we use the outer product of gradient method to find the consistent initial estimators for interest parameters, and then adopt the refined estimation method to improve the efficiency, which is similar to the refined minimum average variance estimation method. An algorithm is proposed to estimate the model directly. Asymptotic properties for the proposed estimation procedure have been established. The bandwidth selection problem is also considered. Simulation studies are carried out to assess the finite sample performance of the proposed estimators, and efficiency comparisons between the estimation methods are made. 相似文献
996.
997.
This paper proposes tests for equality of intercepts of two simple regression models when non sample prior information is available on the equality of two slopes. For three different scenarios on the values of the slope, namely (i) unknown (unspecified), (ii) known (specified), and (iii) suspected, we derive the unrestricted test (UT), restricted test (RT), and pre-test test (PTT) for testing the equality of intercepts. The test statistics, their sampling distributions, and power functions of the tests are obtained. Comparison of power function and size of the tests reveals that the PTT has a reasonable dominance over the UT and RT. 相似文献
998.
Ted Speevak 《统计学通讯:理论与方法》2017,46(17):8419-8429
999.
In this article, we study the asymptotic behaviors of the extreme of mixed skew-t distribution. We consider limits on distribution and density of maximum of mixed skew-t distribution under linear and power normalizations, and further derive their higher-order expansions, respectively. Examples are given to support our findings. 相似文献
1000.
This article investigates the testing for serial correlation in partially linear models with validation data and applies the empirical likelihood methods to construct serial tests statistics, and then we derive the asymptotic distribution of the test statistics under null hypothesis. Simulation results show that our method performs well. 相似文献