随机和的负年龄性质  

The Negative Aging Property of Random Sum

作　　者：付桐林[1] 

机构地区：[1]陇东学院数学系,甘肃庆阳745000

出　　处：《陇东学院学报》2010年第2期1-3,共3页Journal of Longdong University

基　　金：陇东学院青年科技创新项目(XYZK-0714)

摘　　要：关于随机和年龄性质的研究近年来引起了众多研究者的极大关注.本文研究了几何复合随机变量S=ΣNi=1Xi的负年龄性质.在{Xi,i=1,2,…}服从亚指数分布且具有k-HNBUE年龄性质的条件下,得到了随机和S=ΣNi=1Xi若干年龄性质.The aging properties of random sum received a tremendous attention by many researchers in recent years. In this paper the negative aging property of compound geometric random sum S=N∑i=1Xi is investigated. Under the assumption that {Xi,i = 1,2,……} has k -HNBUE aging property and belongs to N subexponential distribution class, some aging properties of random sum S=N∑i=1Xi are derived.

关 键 词：NWU(NBU) NWUE(NBUE) HNWUE(HNBUE) k—HNWUE(k—HNBUE) 

分 类 号：O211.67[理学—概率论与数理统计]