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模糊概率随机变量的数学期望和方差
引用本文:柳美,孙玉琴,李安贵. 模糊概率随机变量的数学期望和方差[J]. 包头钢铁学院学报, 2006, 25(3): 296-298
作者姓名:柳美  孙玉琴  李安贵
作者单位:北京科技大学数力系 北京100083(柳美,李安贵),内蒙古科技大学理学院 内蒙古包头014010(孙玉琴)
基金项目:国家自然科学基金 , 内蒙古科技大学校科研和教改项目
摘    要:在模糊集理论的一般讨论中,大多以交、并算子作为演算算子,但在一些实际问题中,有时需要用到别的演算算子.首先以最大乘积算子作为模糊集的演算算子,证明了最大乘积算子满足分配率.然后引入了模糊概率随机变量的独立性,给出了离散型模糊概率随机变量的数学期望性质的证明.最后根据离散型模糊概率随机变量的数学期望是一个模糊集,对离散型模糊概率随机变量的方差作出了一种新的定义,并对方差的性质进行了证明.

关 键 词:模糊概率  随机变量  数学期望  方差  模糊概率  随机变量的  数学期望  期望和方差  fuzzy probability  random variable  variance  expectation  性质的证明  离散型  独立性  分配率  模糊集理论  乘积算子  问题  演算
文章编号:1004-9762(2006)003-0296-03
修稿时间:2006-04-18

Mathematical expectation and variance of random variable with fuzzy probability
LIU Mei,SUN Yu-qin,LI An-gui. Mathematical expectation and variance of random variable with fuzzy probability[J]. Journal of Baotou University of Iron and Steel Technology, 2006, 25(3): 296-298
Authors:LIU Mei  SUN Yu-qin  LI An-gui
Abstract:Union and intersection are mostly used as computation operators in the theory of fuzzy sets,but some other computation operators are needed sometimes in solving practical problems.Max and product operators were firstly used as computation operators of fuzzy sets whose distributive law was proved.Then the independence of random variables with fuzzy probability(RVFP) was introduced,with the characters of mathematical expectation of discrete RVFP proved.A new definition of variance of the discrete RVFP was given and its characters were proved on the basis of that the mathematical expectation is a fuzzy set.
Keywords:fuzzy probability  random variable  mathematical expectation  variance
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