针对系统负载扰动的随机不可控性，提出了负载扰动补偿控制方法。
For the uncontrollability and randomness of load vibration, the load vibration compensation control is proposed.
随机分形法和曲面造型法分别在地形生成的随机性和可控性方面能起到一定的作用。
There exist already methods for combining random mid-point displacement method with curved-surface modeling to generate mountain terrain.
因此，非常有必要对随机泛函微分包含解的存在性，可控性和泛函微分方程周期解的存在性问题进行研究。
It is necessary for us to study the existence and controllability of the solution of stochastic differential inclusions and the existence of periodic solutions for functional differential equations.
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