The experimental results show that the system has good dynamic performance and control effect.

实验结果表明，该调速系统具有良好的动态性能和控制效果。

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The Converter Control system has no effect on the first crest overvoltage but may have effect on the following crest overvoltage.

换流器控制系统对过电压的第一个峰值没有影响，但对以后的峰值有控制作用。

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The experimental result of the control performance of the passive noise control system, shows that the control effect was notable.

最后利用该测试系统对飞机座舱模型噪声无源控制系统进行了控制性能测试，控制效果明显。

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Our goal is to take the smaller equipment that's flexible, put it on vessels of opportunity, and then coordinate better with our local state partners, including National Guard overflights, local fishermen's associations, and so forth, mass our effect and get it pointed up with a command and control system that can attack it on all levels.

WHITEHOUSE: A First-Hand Look at the Federal Response to the BP Oil Spill

Sir Andrew also said the government's points-based system to control non-EU immigration had so far "had very little effect".

BBC: Crowds of people