运用均值、方差概念来定义的滑动模可达性，更能反映系统的随机特征。

Using mean, variance conceptions in the definition of the sliding mode reachability can better reflect the stochastic characteristics of the systems.

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采用子结构模态综合和摄动随机有限元相结合求解工程结构的随机特征问题。

In this paper, the component mode synthesis, combined with the perturbation and stochastic finite element, is used to study the random eigen problem of large and complicated structures.

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利用随机微分方程理论，对一类具有随机特征的风险投资组合问题进行深入研究。

With the theory of stochastic differential equation, the authors discuss a problem of a class of risk investment portfolio with stochastic character.

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