回归系数最小二乘估计的Bootstrap估计

本文对线性模型的回归系数β的线性函数α＾Ｔβ的最小二乘估计α＾Ｔβ建立了一种新的ｂｏｏｔｓｔｒａｐ逼近，给出了逼近的相合性定量，得到了ｏ（ｎ＾－１／２）的逼近速度。     

线性模型L－估计其光滑Bootstrap统计量的一些渐近结构

本文证明了文［２］中Ｌ－估计具有强相合性，重对数律，并给出了它的均方收敛速度．证明了Ｌ－估计的光滑Ｂｏｏｔｓｔｒａｐ统计量有与Ｌ－估计类似的线性渐近展开式，由此展开式我们证明了它的渐近正态性及其光滑Ｂｏｏｔｓｔｒａｐ逼近成立．     

条件t-分位数核估计的逼近速度

该文研究了条件狋 分位数核估计的逼近速度问题．在适当的条件下,给出了核估计的强收敛速度、正态逼近速度和Ｂｏｏｔｓｔｒａｐ逼近速度．     

L-统计量的Edgeworth展开和Bootstrap逼近

文「１」讨论了Ｌ－统计量的一种能达到０（１／√ｎ）精确性的Ｂｏｏｔｓｔｒａｐ逼近,本文则在适当条件下,证明了上述Ｂｏｏｔｓｔｒａｐ逼近能达到精确性０（１／√ｎ）,并给出了Ｌ－统计量的一阶Ｅｄｇｅｗｏｒｔｈ展开的估计。     

密度核估计的样条光滑Bootstrap逼近

密度核估计的样条光滑Ｂｏｏｔｓｔｒａｐ逼近钱伟民（同济大学应用数学系，上海２０００９２）ＳＰＬＩＮＥＳＭＯＯＴＨＥＤＢＯＯＴＳＴＲＡＰＰＩＮＧＦＯＲＫＥＲＮＥＬＥＳＴＩＭＡＴＯＲ￥ＱＩＡＮＷＥＩＭＩＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＭａｔｈ...     

学生化U—统计量的Edgeworth展开和Bootstrap逼近

本文研究学生化Ｕ－统计量的Ｅｄｇｅｗｏｒｔｈ展开和Ｂｏｏｔｓｔｒａｐ逼近，在核函数ｈ较弱的矩条件下，给出了学生化Ｕ－统计量的一项Ｅｄｇｅｗｏｒｔｈ展开式和Ｂｏｏｔｓｔｒａｐ逼近。     

样本均值Bootstrap逼近的收敛速度

本文进一步研究Ｂｏｏｔｓｔｒａｐ逼近的收敛速度，在随机变量的（２＋δ）阶矩（０≤δ＜２）有限的情况下，讨论标准化样本均值的分布与它的Ｂｏｏｔｓｔｒａｐ逼近之间差的一致收敛速度，以及这种逼近与正态分布之间差的一致收敛速度。     

L─统计量的Bootstrap逼近

Ｌ─统计量的Ｂｏｏｔｓｔｒａｐ逼近任哲，陈明华（六安师范专科学校，六安２３７０１２）本文提出了Ｌ──统计量的一种Ｂｏｏｔｓｔｒａｐ逼近，并讨论了这种逼近的相合性及其逼近的精确性。一、引言及主要定理设兄，ｉ＞１为来自分布为Ｆ的ｉ．ｉ．ｄ．样本，以Ｘ．；...     

协方差矩阵的齐性检验

基于ＰＰ技术、Ｂｏｏｔｓｔｒａｐ方法和数论方法,对于ｋ个总体协方差矩阵相等的检验,给出了ＰＰ型检验统计量,并讨论了它的渐近分布和Ｂｏｏｔｓｔｒａｐ逼近,最后给出了一些实际模拟结果。     

m相依样本均值的Bootstrap及其随机加权逼近的收敛速度

本文研究了ｍ相依样本均值的Ｂｏｏｔｓｔｒａｐ及随机加权逼近问题，讨论了有关收敛速度。     

Edgeworth expansion for the survival function estimator in the Koziol-Green model

In the Koziol-Green or proportional hazards random censorship model, the asymptotic accuracy of the estimated one-term Edgeworth expansion and the smoothed bootstrap approximation for the Studentized Abdushukurov-Cheng-Lin estimator is investigated. It is shown that both the Edgeworth expansion estimate and the bootstrap approximation are asymptotically closer to the exact distribution of the Studentized Abdushukurov-Cheng-Lin estimator than the normal approximation.     

Bootstrap for the conditional distribution function with truncated and censored data

We propose a resampling method for left truncated and right censored data with covariables to obtain a bootstrap version of the conditional distribution function estimator. We derive an almost sure representation for this bootstrapped estimator and, as a consequence, the consistency of the bootstrap is obtained. This bootstrap approximation represents an alternative to the normal asymptotic distribution and avoids the estimation of the complicated mean and variance parameters of the latter.     

非截尾型 L 统计量的 Bootstrap 逼近

For the L-statistic T■=intergral from 0 to 1 F_n~(-1)(t)J(t)dt sum from j=1 to n a_jF_n~(-1)(P_j),under the assump-tion that J(u) is continuous on [0,1] (that is,T(F_n) is a nontrimmed L-statisticand other conditions on F(x),we use the bootstr 这里 J 为[0,1]上的可积函数,F~(-1)(t)(?)inf{x:F(x)≥t},0相似文献   

Kernel-based goodness-of-fit tests for copulas with fixed smoothing parameters

We study a test statistic based on the integrated squared difference between a kernel estimator of the copula density and a kernel smoothed estimator of the parametric copula density. We show for fixed smoothing parameters that the test is consistent and that the asymptotic properties are driven by a U-statistic of order 4 with degeneracy of order 1. For practical implementation we suggest to compute the critical values through a semiparametric bootstrap. Monte Carlo results show that the bootstrap procedure performs well in small samples. In particular, size and power are less sensitive to smoothing parameter choice than they are under the asymptotic approximation obtained for a vanishing bandwidth.     

Bootstrap estimation of the asymptotic variances of statistical functionals

A modified bootstrap estimator of the asymptotic variance of a statistical functional is studied. The modified bootstrap variance estimator circumvents the problem of the original bootstrap when the population distribution has heavy tails, and requires less stringent conditions for its consistency than the ordinary bootstrap variance estimator. The consistency of the modified bootstrap variance estimator is established for differentiable statistical functionals.     

An exact bootstrap for variance of finite-population <Emphasis Type="BoldItalic">L</Emphasis>-statistic

We give an exact formula of a finite-population bootstrap variance estimator for a general class of L-statistic. It is aimed to reduce the computational burden and to eliminate the approximation error, typically present in resampling approximations based on simulation. In the case of the classical nonparametric Efron bootstrap, a similar formula was shown by Hutson and Ernst [A.D. Hutson and M.D. Ernst, The exact bootstrap mean and variance of an L-estimator, J. R. Stat. Soc., Ser. B, 62:89–94, 2000].     

BOOTSTRAP WAVELET IN THE NONPARAMETRIC REGRESSION MODEL WITH WEAKLY DEPENDENT PROCESSES

This paper introduces a method of bootstrap wavelet estimation in a nonparametric regression model with weakly dependent processes for both fixed and random designs. The asymptotic bounds for the bias and variance of the bootstrap wavelet estimators are given in the fixed design model. The conditional normality for a modified version of the bootstrap wavelet estimators is obtained in the fixed model. The consistency for the bootstrap wavelet estimator is also proved in the random design model. These results show that the bootstrap wavelet method is valid for the model with weakly dependent processes.     

Estimation and Bootstrap with Censored Data in Fixed Design Nonparametric Regression

We study Beran's extension of the Kaplan-Meier estimator for thesituation of right censored observations at fixed covariate values. Thisestimator for the conditional distribution function at a given value of thecovariate involves smoothing with Gasser-Müller weights. We establishan almost sure asymptotic representation which provides a key tool forobtaining central limit results. To avoid complicated estimation ofasymptotic bias and variance parameters, we propose a resampling methodwhich takes the covariate information into account. An asymptoticrepresentation for the bootstrapped estimator is proved and the strongconsistency of the bootstrap approximation to the conditional distributionfunction is obtained.     

Differentiable Functionals and Smoothed Bootstrap

The differentiability properties of statistical functionals have several interesting applications. We are concerned with two of them. First, we prove a result on asymptotic validity for the so-called smoothed bootstrap (where the artificial samples are drawn from a density estimator instead of being resampled from the original data). Our result can be considered as a smoothed analog of that obtained by Parr (1985, Stat. Probab. Lett., 3, 97-100) for the standard, unsmoothed bootstrap. Second, we establish a result on asymptotic normality for estimators of type generated by a density functional being a density estimator. As an application, a quick and easy proof of the asymptotic normality of , (the plug-in estimator of the integrated squared density ) is given.     

Comparison on five estimation approaches of intensity for a queueing system with short run

Traffic intensity is an important measure for assessing performance of a queueing system. In this paper, we propose a consistent and asymptotically normal estimator (CAN) of intensity for a queueing system with distribution-free interarrival and service times. Using this estimator and its estimated variance, a 100(1 ? α)% asymptotic confidence interval of the intensity is constructed. Also, four bootstrap approaches—standard bootstrap, Bayesian bootstrap, percentile bootstrap, and bias-corrected and accelerated bootstrap are also applied to develop the confidence intervals of the intensity. A comparative analysis is conducted to demonstrate performances of the five confidence intervals of the intensity for a queueing system with short run data.