在地震与海啸得到缓慢控制之后，巨大的层层叠叠的房屋残骸已能见到。
The huge piles of debris that were visible immediately after the quake and tsunami were slowly being managed.
本文重点对载波层叠和空间矢量PWM控制方法进行了研究。
This dissertation researched on carrier disposition and space vector PWM control method of three-level NPC inverter.
控制策略选用的是同相载波层叠调制，并且利用DSP的EPWM模块进行了数字化的实现。
Phase disposition modulation is selected as control strategy, which is digitally realized by EPWM module of DSP.
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