在这里，离散的开或关的状态调制本身可以被用来控制开关，从而控制得或电流负载。

Here the discrete on or OFF state of the modulation itself can be used to control the switches thereby controlling the voltage or current across the load.

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以电流给定，脉宽调制(PWM)调压调速系统为例，研究各种制动状态下的能量回馈过程。

Based on given electric current and Pulse Width Modulation (PWM) controlling system, the feedback process under each braking condition is studied.

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研究了不同调制速率下的增益开关半导体激光器的最佳工作状态。

The optimal operating condition of gain switched semiconductor laser with different modulation rate is studied in this paper.

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