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重尾相关非负随机变量的随机加权和

Randomly Weighted Sums of Dependent Nonnegative Random Variables with Subexponential Tails
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摘要 本文讨论了当符合文中第2部分给出的相关定义既允许正相关又允许负相关,权重随机变量与独立的情形下,重尾非负随机变量的随机加权和的渐进式,并证明了如下关系成立。p(max nθkXk〉x)-P(n∑θkXk〉x)-x∑k-1^-Fx(x/θk),x→∞。 Let(Xk,1≤k≤n) be n dependent random variables and (θk,1≤ k≤n)be other n random variables independent of(Xk,1≤k≤n)and satisfying that for any 0 〈a≤1,a≤θk≤1 f or all 1≤k≤n .This paper proves that the asymptotic relations p(max nθkXk〉x)-P(n∑θkXk〉x)-x∑k-1^-Fx(x/θk),x→∞.
作者 陈瑾
出处 《中国科教创新导刊》 2009年第4期112-114,共3页 CHINA EDUCATION INNOVATION HERALD
关键词 重尾分布 破产概率 渐进性 相关 随机加权和 heavy--tailed distribution ruin probability dependents weighted sums
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参考文献11

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