在模糊随机变量的基础上引入了模糊随机向量凸集的概念，给出了几个模糊随机凸集的例子。

Based on the concept of fuzzy random variable, the concept of convex sets of fuzzy random vectors is introduced, and some examples for such type of convex sets are given.

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本文给出了模糊随机变量的方差这一概念，并讨论了它的一些性质及计算方法。

This paper gives a new concept of variance of fuzzy random variables and discusses it's property and calculation.

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为求出随机特征对的方差，借助于模态截断概念推出诸特征值与特征向量对随机变量的偏导数。

Partial derivatives of eigenvalues and eigen vectors with respect to random variables for structures are deduced by means of the concept of mode truncation.

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We have instead what's called a probability density when we have continuous random variables.

所以我们用概率密度的概念来描述,连续型随机变量的情况

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