关于任意B值r.v.序列的强收敛性的注

本文对仅在矩条件限制下的任意B值r.v.序列的强收敛性进行讨论,改进推广了已有的几个结果,使之成为本文结论的推论,同时也推广了其它相关的经典结论.     

各向异性双3次Hermite元的超收敛性与点态超收敛性

本文研究了双三次Hermite 矩形元的超收敛问题. 利用双线性引理和Bramble-Hilbert引理, 在无正则性条件的假设下, 得到了双三次Hermite 矩形元的自然超收敛性及点态超收敛性结果.该结论与传统的有限元正则条件下的结论一致; 与传统的超收敛分析方法-积分恒等式法相比, 本文的方法既简单又便于推广.     

两两NQD随机序列的完全收敛性

本文进一步研究了两两NQD随机序列的完全收敛性.在一些简单和弱的条件下获得了两两NQD随机序列的一些结果.所获结果不仅推广了Liu(2004)以及Gan和Chen (2008)的相应结果,而且还改进了他们的结论.     

各向异性双3次Hermite元的超收敛性与点态超收敛性

本文研究了双三次Hermite矩形元的超收敛问题.利用双线性引理和Bramble-Hilbert引理,在无正则性条件的假设下,得到了双三次Hermite矩形元的自然超收敛性及点态超收敛性结果.该结论与传统的有限元正则条件下的结论一致;与传统的超收敛分析方法—-积分恒等式法相比,本文的方法既简单又便于推广.     

非负NOD随机变量序列的逆矩

仅在一阶矩有限的条件下获得了非负NOD随机变量序列正则和的逆矩的渐近逼近,特别得到了部分和的逆矩的渐近逼近.本文的结论推广了已有的结果.     

平面自治系统极限环的存在性

本文研究一般自治系统的极限环存在性问题，在一定条件下，我们证明该系统极限环的存在性，所得结果推广和改进了文［５—７］的相应结论．     

近于准凸映照推广族的系数估计

本文, 我们在复Banach 空间单位球或Cⁿ 单位多圆柱中引入一类近于准凸映照的推广族, 该族实际上是单复变中近于凸函数的子族在多复变中的推广. 并且得到了该映照族在满足一定条件下齐次展开式的系数估计. 本文所得结果推广了许多已知结论.     

局部渐近二次条件下带阻尼问题周期解的存在性

本文研究二阶带阻尼问题周期解的存在性问题.在局部渐近二次条件下,利用临界点理论,获得一些新的存在性结果,推广了已有文献的相关存在性结论.     

非Lipschitz条件下的倒向重随机微分方程

该文研究了非Lipschitz条件下的倒向重随机微分方程, 给出了此类方程解的存在唯一性 定理, 推广Pardoux和Peng 1994年的结论; 同时也得到了此类方程在非Lipschitz条件下的比较定理, 推广了Shi,Gu和Liu 2005年的结果. 从而推广倒向重随机微分方程在随机控制和随机偏微分方程在 粘性解方面的应用.     

一类周期非线性差分方程的基态解

本文研究了一类二阶周期非线性差分方程基态解的存在性问题.利用临界点理论结合Nehari流形方法,获得了此类方程基态解的存在性.在比经典AR条件更一般的超二次条件下,本文结论推广了已有的结果,并举例说明此类方程解的存在性.     

Complete Convergence of Weighted Sums for Arrays of Rowwise m-negatively Asso ciated Random Variables

In this paper, we discuss the complete convergence of weighted sums for arrays of rowwise m-negatively associated random variables. By applying moment inequality and truncation methods, the sufficient conditions of complete convergence of weighted sums for arrays of rowwise m-negatively associated random variables are established. These results generalize and complement some known conclusions.     

Complete Convergence of Weighted Sums for Arrays of Rowwise $m$-Negatively Associated Random Variables

In this paper, we discuss the complete convergence of weighted sums for arrays of rowwise $m$-negatively associated random variables. By applying moment inequality and truncation methods, the sufficient conditions of complete convergence of weighted sums for arrays of rowwise $m$-negatively associated random variables are established. These results generalize and complement some known conclusions.     

NA序列线性形式的强稳定性

本文研究了NA变量线性形式的强稳定性.利用随机变量的截尾术及强大数定律,得到了一般情况下不同分布NA变量具有强稳定性的充分条件,推广了NA列的Jamison型加权和具有强稳定性的充分条件.     

Moment Complete Convergence for Weighted Sums of -Mixing Random Variables

In this paper, the authors discuss the moment complete convergence for weighted sums of -mixing random variables, and obtains the sufficient condition for moment complete convergence of -mixing sequence under some mixing rate condition, which generalize the result of moment complete convergence for weighted sums of i.i.d. random variables to -mixing random variables.     

Ψ-混合随机变量序列的强大数定律(英文)

主要研究Ψ-混合随机变量序列部分和的强大数定律,并且得到了一些新结果在混合系数满足一定条件时,本文的结果推广了独立序列的相应结果.     

ρ-混合序列加权和的完全收敛性

本文研究ρ-混合随机变量序列的加权和.利用文献[10]的矩不等式,在勿需控制混合系数的情况下,得到了完全收敛的充分条件,对“同分布”情形,得到了完全收敛的必要条件,推广了文献[8,10]中的有关结果.     

A Central Limit Theorem for Non-stationary Strongly Mixing Random Fields

In this paper we extend a central limit theorem of Peligrad for uniformly strong mixing random fields satisfying the Lindeberg condition in the absence of stationarity property. More precisely, we study the asymptotic normality of the partial sums of uniformly \(\alpha \)-mixing non-stationary random fields satisfying the Lindeberg condition, in the presence of an extra dependence assumption involving maximal correlations.     

两两NQD阵列加权乘积和的完全收敛性和强大数定律

利用截尾法和两两NQD列部分和矩不等式,得到了两两NQD阵列加权乘积和的强大数定律,并在h-可积条件下给出了其完全收敛性的一个充分条件.     

不同分布NA序列加权和的完全收敛性

本文讨论了不同分布NA随机变量序列加权和的完全收敛性，获得了较[7]中的定理1及定理A更为一般的安全收敛性，并得到了完全收敛速度与矩条件之间的等价关系。     

Central limit theorem for positively associated stationary random fields

Positively associated stationary random fields on d-dimensional integral lattice arise in various models of mathematical statistics, percolation theory, statistical physics, and reliability theory. In this paper, we shall be concerned with a field with covariance functions satisfying a more general condition than summability. A criterion for the validity of the central limit theorem (CLT) for partial sums of a field from this class is established. The sums are taken over an increasing nest of parallelepipeds or cubes. The well-known conjecture of Newman stated that for an associated stationary random field the above condition on the covariance function should force the CLT to hold. As was shown by N. Herrndorf and A. P. Shashkin, this conjecture fails already for d = 1. In the present paper, the uniform integrability of the squared partial sums is shown as being of key importance for the CLT to hold. Thus, an extension of Lewis’s theorem proved for a sequence of random variables is obtained. Also, it is indicated how to modify Newman’s conjecture for any d. A representation of variances of partial sums of a field by means of slowly varying functions of several arguments is used in an essential way.