Now the study of MBR focuses on macro parameter control and system running effected by sludge characteristics, and there are little studies on molecule ecology of active sludge.

以前大部分研究集中于宏观工程参数控制和活性污泥特性对系统运行的作用过程，针对系统内活性污泥的分子生态学研究尚少。

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A series of numerical parametric studies on active control of separation flow over a hump model are presented.

针对凸包流动分离主动控制开展了参数化数值研究。

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So this thesis studies the active noise control technique in the cabins.

为此本文对舱室空间内的有源噪声控制技术进行了研究。

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