共查询到20条相似文献,搜索用时 140 毫秒
1.
利用逆鞅、截尾等方法,我们得出行-列可变换随机变量组列的大数定律,作为推论,我们得到具有有限均值的行-列可变换无限组列满足强大数定律的充要条件是该组列的对角线元素不相关。再充分利用对称性及可变换性,我们得到对称可变换随机变量和的极限定理,并由此导出对称行-列可变换随机变量组列的完全收敛定理。 相似文献
2.
给出了具有不同分布的NA随机变量列满足的若干强大数律;作为应用,不仅将独立随机变量的一类强极限定理完整的推广到NA随机变量情形,而且关于NA随机变量的一些已有结果可以作为推论得出. 相似文献
3.
本文给出了Fourier变换在求解相互独立的连续随机变量之和分布中的应用,证明了正态随机变量的可加性,方法简便、快速.这些充分显示了此工具的实用性. 相似文献
4.
《数学的实践与认识》2013,(16)
设X是一个连续型随机变量,其密度函数为px(x),g(x)是一个连续函数,给出了用积分变换求随机变量X的函数9(X)的密度函数的一个方法.该方法比传统的方法更简单. 相似文献
5.
采用鞅方法研究对任意随机变量序列普遍成立的强极限定理.并作为推论得到了m阶马氏过程,鞅序列,鞅差序列,独立随机变量序列的一类强极限定理.并把赌博系统的随机变换概念推广到任意随机变量序列的情况,得到任意随机变量序列随机选择与公平比的若干极限定理. 相似文献
6.
7.
利用NA随机变量的指数不等式,对于具有重尾分布的同分布的NA随机变量序列,得到了用积分检验来刻划其加权部分和的极限定理,作为推论还得到了Chover型重对数律.把这些结果应用到经典的可和方式,获得了相应的结果.这些结果推广了已知的一些结论. 相似文献
8.
随机变量序更加权和的强收敛性 总被引:3,自引:0,他引:3
本文讨论一般随机变量序列加权和强收敛性,并为推论,得到一类鞅差序列加权和昨若干经典的独立随机变量序是的强大数定律,已有的若干结论是本文结果的特例。 相似文献
9.
基于渐近正态随机变量,导出随机变量函数极限分布的两个一般性理论结果.作为应用,证明了渐近正态随机变量一系列具体函数的极限分布,其中包括泊松随机变量平方根的渐近正态性,以及随机变量部分和在正则化常数是随机变量情况下的渐近正态性. 相似文献
10.
11.
Suppose that the failure times of the units placed on a life-testing experiment are independent but nonidentically distributed random variables. Under progressively type II censoring scheme, distributional properties of the proposed random variables are presented and some inferences are made. Assuming that the random variables come from a proportional hazard rate model, the formulas are simplified and also the amount of Fisher information about the common parameters of this family is calculated. The results are also extended to a fixed covariates model. The performance of the proposed procedure is investigated via a real data set. Some numerical computations are also presented to study the effect of the proportionality rates in view of the Fisher information criterion. Finally, some concluding remarks are stated. 相似文献
12.
13.
Letbe a sequence of real-valued random
variables and be other random variables which are independent
of the form sequence. Suppose that are pairwise generalized negatively
orthant dependent with heavy tails under the condition that are
independent or associated, some asymptotic formulas are established. 相似文献
14.
Aniello Buonocore Enrica Pirozzi Luigia Caputo 《Statistics & probability letters》2009,79(19):2092-2097
An inductive procedure is used to obtain distributions and probability densities for the sum Sn of independent, non-equally uniform random variables. Some known results are then shown to follow immediately as special cases. Under the assumption of equally uniform random variables some new formulas are obtained for probabilities and means related to Sn. Finally, some new recursive formulas involving distributions are derived. 相似文献
15.
S. N. Storchak 《Theoretical and Mathematical Physics》1996,109(1):1260-1268
We obtain new formulas for the transformations of Wiener path integrals corresponding to the parabolic systems of two differential equations with time-dependent coefficients in one-dimensional space. These formulas determine the transformation of the path integrals under a rheonomous-homogeneous-pointwise transformation of integration variables and the path reparameterization transformation. These formulas allow us to obtain an integral relation between the Green's functions of related systems of differential equations. We show how to obtain the generalized Shepp formula from this relation for the path integral under consideration. We derive these new formulas using the properties of random processes under phase transitions and a random change in time.Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 109, No. 1, pp. 17–27, October, 1996. 相似文献
16.
M. Kamiski 《Numerical Linear Algebra with Applications》2004,11(4):355-370
The wavelet‐based decomposition of random variables and fields is proposed here in the context of application of the stochastic second order perturbation technique. A general methodology is employed for the first two probabilistic moments of a linear algebraic equations system solution, which are obtained instead of a single solution projection in the deterministic case. The perturbation approach application allows determination of the closed formulas for a wavelet decomposition of random fields. Next, these formulas are tested by symbolic projection of some elementary random field. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
17.
We obtain formulas for the expectation and the second moment function of the solution of the Cauchy problem for an inhomogeneous
differential heat equation with two phase variables and with independent Gaussian random coefficients. 相似文献
18.
19.
潘家柱 《中国科学A辑(英文版)》2002,45(6):749-760
Discussed in this paper is the dependent structure in the tails of distributions of random variables from some heavy-tailed
stationary nonlinear time series. One class of models discussed is the first-order autoregressive conditional heteroscedastic
(ARCH) process introduced by Engle (1982). The other class is the simple first-order bilinear models driven by heavy-tailed
innovations. We give some explicit formulas for the asymptotic values of conditional probabilities used for measuring the
tail dependence between two random variables from these models. Our results have significant meanings in finance. 相似文献
20.
This paper considers the asymptotics of randomly weighted sums and their maxima, where the increments {X_i,i\geq1\} is a sequence of independent, identically distributed and real-valued random variables and the weights {\theta_i,i\geq1\} form another sequence of non-negative and independent random variables, and the two sequences of random variables follow some dependence structures. When the common distribution F of the increments belongs to dominant variation class, we obtain some weakly asymptotic estimations for the tail probability of randomly weighted sums and their maxima. In particular, when the F
belongs to consistent variation class, some asymptotic formulas is presented. Finally, these results are applied to the asymptotic estimation for the ruin probability. 相似文献