相协样本分布函数光滑估计的正态逼近速度

在平稳相协样本下,讨论分布函数光滑估计的一致渐近正态性.在较合理的条件下给出了分布函数光滑估计的一致渐近正态性的收敛速度,这个速度几乎达到n~(-1/4).     

两种相依样本经验过程增量的收敛速度及其在光滑估计中的应用

设平稳序列　　　其共同分布为Ｆ。本文研究了β－混合和α－混合序列的经验过程增量，在混合速度为非指数速度的情况下给出了经验过程增量的强收敛和弱收敛意义下的收敛速度，在分布函数Ｆ绝对连续时，构造了核光滑经验分布函数估计，并利用经验过程增量的收敛速度建立了该光滑经验分布函数逼近及真分布函数的收敛速度。     

加权平方损失下伽玛分布族Γ(θ,1/2)参数θ的EB估计

在加权平方损失函数下讨论了伽玛分布族T(θ,1/2)参数θ的经验Bayes(EB)估计,并讨论了EB估计的收敛速度问题,在一定条件下,收敛速度可充分接近于1.     

广义Pareto分布参数的经验Bayes估计的收敛速度

在加权平方损失函数下,获得广义Pareto分布形状参数的经验Bayes(EB)估计,并得到了该估计的收敛速度.     

Linex损失下对数伽玛分布的经验贝叶斯估计的收敛速度

在Linex损失函数下,研究对数伽玛分布的经验贝叶斯估计问题,在适当的条件下,得到了经验贝叶斯估计的收敛速度.最后给出一个例子,说明定理的合理性.     

刻度指数族参数的经验Bayes估计及收敛速度

本文在刻度平方误差损失函数下导出了刻度指数族分布中参数的Bayes估计.利用核估计的方法构造了参数的经验Bayes估计,在适当条件下得到了经验Bayes估计的收敛速度,推广了文献中的相关结果.     

刻度指数族参数的经验Bayes估计及收敛速度

本文在刻度平方误差损失函数下导出了刻度指数族分布中参数的Bayes 估计. 利用核估计的方法构造了参数的经验Bayes 估计, 在适当条件下得到了经验Bayes 估计的收敛速度, 推广了文献中的相关结果.     

LINEX损失下Paret0分布族参数的经验Bayes估计

在"nex损失函数下,讨论Pareto分布族参数的经验Bayes(EB)估计问题,文中构造了参数的EB估计,在适当的条件下给出了该估计的收敛速度.最后给出满足定理条件的例子.     

LINEX损失下Pareto分布族参数的经验Bayes估计

在 L inex损失函数下 ,讨论 Pareto分布族参数的经验 Bayes(EB)估计问题 ,文中构造了参数的 EB估计 ,在适当的条件下给出了该估计的收敛速度 .最后给出满足定理条件的例子 .     

Linex损失下二维单边截断型分布族参数的经验Bayes估计

在linex损失函数下,讨论边二维单边截断型分布族参数的经验Bayes(EB)估计问题,文中构造了参数的EB估计,在适当的条件下给出了该估计的收敛速度。并说明在较强条件下收敛速度可充分接近1。     

N-A样本下单边截断型分布族位置参数函数E·B估计的收敛速度

§ 1.　IntroductionandtheMainResult　　Asfarasweknown ,theissuesofEmpirialBayes(E·B)statisticsmainlyincludedE·Bes timationsandE·Btests ,whichwereconsideredandstudiedformerlyunderi.i.d .samples.However,insteadofgetingi.i.d .samplesinsomefieldssuchasreliabletheory ,penetratedtheoryandsomemultivariateanalysis,etc .,weoftengetsomeassociatedsamplessuchasposi tivelyassociationandnegativelyassociation .Recently ,professorWEI [3],XU [4],andLING [5 ]consideredrespectivelytheissuesofE·Btesta…     

Partial functional linear quantile regression

This paper studies estimation in partial functional linear quantile regression in which the dependent variable is related to both a vector of finite length and a function-valued random variable as predictor variables. The slope function is estimated by the functional principal component basis. The asymptotic distribution of the estimator of the vector of slope parameters is derived and the global convergence rate of the quantile estimator of unknown slope function is established under suitable norm. It is showed that this rate is optimal in a minimax sense under some smoothness assumptions on the covariance kernel of the covariate and the slope function. The convergence rate of the mean squared prediction error for the proposed estimators is also be established. Finite sample properties of our procedures are studied through Monte Carlo simulations. A real data example about Berkeley growth data is used to illustrate our proposed methodology.     

强混合样本回归函数估计的强相合性

本文基于强混合样本，给出回归函数核估计的强相合性，全面地改进了胡舒合（１９９５）所得的相应的初步结果。     

再论逆自相关函数自回归估计的渐近性质（Ⅰ）：强收敛速度

本文在一组相当广泛的条件下,证明了线性平稳时间序列逆自相关函数自回归估计的强收敛速度,讨论这一估计在MA模型估计中的应用,获得了参数估计的强收敛速度和阶的强相容估计.     

Wavelet estimation of the diffusion coefficient in time dependent diffusion models

The estimation problem for diffusion coefficients in diffusion processes has been studied in many papers,where the diffusion coefficient function is assumed to be a 1-dimensional bounded Lipschitzian function of the state or the time only.There is no previous work for the nonparametric estimation of time-dependent diffusion models where the diffusion coefficient depends on both the state and the time.This paper introduces and studies a wavelet estimation of the time-dependent diffusion coefficient under a more general assumption that the diffusion coefficient is a linear growth Lipschitz function.Using the properties of martingale,we translate the problems in diffusion into the nonparametric regression setting and give the L~r convergence rate.A strong consistency of the estimate is established.With this result one can estimate the time-dependent diffusion coefficient using the same structure of the wavelet estimators under any equivalent probability measure.For example, in finance,the wavelet estimator is strongly consistent under the market probability measure as well as the risk neutral probability measure.     

在函数逼近论观点下半参数变系数非线性回归函数的估计

在函数逼近论的观点下研究了半参数变系数非线性回归函数的估计问题.采用总体之下L2多项式最佳逼近的方法与样本之下矩估计的方法,独立地分别作出非参数部分与变系数参数部分的解析函数形式的估计,最终得到回归函数的L2与强相合之联合收敛意义下的估计.     

Convergence rate for predictive recursion estimation of finite mixtures

Predictive recursion (PR) is a fast stochastic algorithm for nonparametric estimation of mixing distributions in mixture models. It is known that the PR estimates of both the mixing and mixture densities are consistent under fairly mild conditions, but currently very little is known about the rate of convergence. Here I first investigate asymptotic convergence properties of the PR estimate under model misspecification in the special case of finite mixtures with known support. Tools from stochastic approximation theory are used to prove that the PR estimates converge, to the best Kullback-Leibler approximation, at a nearly root-n rate. When the support is unknown, PR can be used to construct an objective function which, when optimized, yields an estimate of the support. I apply the known-support results to derive a rate of convergence for this modified PR estimate in the unknown support case, which compares favorably to known optimal rates.