另一方面讨论了随机利率下的一些离散年金、连续年金和连续生存年金现值随机变量的一阶和二阶原点矩及其方差。
On the other hand, the moment, the second moment and variance of the present value random variables about some life annuities and annuities with random interest rate are gotten.
给出二阶模糊随机变量和模糊随机变量序列均方收敛的概念，证明了一些相关的性质。
The concepts of second order fuzzy random variables and mean square convergence of sequences of fuzzy random variables are introduced. Some related properties are proved.
在第二章，本文讨论了带有控制变化尾的，负相协随机变量的非随机和和随机和的精致大偏差。
In Chapter 2, we discuss the precise large deviations for non-random and random sums of negatively associated nonnegative random variables with common dominatedly varying tail distribution function.
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