... double foul 双方犯规 double frequency modulation 双重调频 double frequency shift keying 双移频键控 ...
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double-frequency phase modulation 实现激光双频相位调制
Double space vector modulation and overmodulation of matrix converter were proposed in this paper to ensure the matrix converter switching frequency to be fixed and fast dynam-ic torque response.
结合矩阵变换器双空间矢量调制方法，并将矩阵变换器过调制方法用于感应电机直接转矩控制中，达到矩阵变换器开关频率恒定和电机快速转矩响应的目的。
In order to decrease the mirror frequency interference, cross interference and inter-modulation interference, double IF (Intermediate frequency) is adopted in the receiver.
为了降低镜频干扰、交调和互调干扰，接收机采用了双中频方案。
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