进一步增加调制周期，两调制层之间产生非共格界面，破坏了薄膜中的交变应力场，薄膜的硬度和弹性模量也随之降低。
Further increasing modulation period leads to the emerge of incoherent interface and the destroy of alternating stress field, accompanied by the decreased mechanical properties.
用交变电压调制固定在光纤光栅上的PZT，同时对施加在光栅上的应力进行测量。
The PZT is modulated by periodicity voltage and the fiber grating fixing on the it is also modulated by PZT.
导出了矩阵变换器的交-交直接变换控制规律和双空间矢量PWM调制策略，建立了交-交直接变换控制方式下矩阵变换器的数学模型。
The AC-AC direct transformation control and the double-space-vector PWM scheme of the matrix converter are deduced, mathematic model of space vector modulation (SVM) matrix converter is built.
FANUC一11型交一直一交频调速系统，调速的控制方法为脉冲宽度调制(pwm)法。
The AC servo system of FANUC 11 series is a AC-DC-AC conversion frequency speed adjusting system, which use PWM as the speed-adjusting control method.
用交变电压调制固定在光纤光栅上的PZT，同时对施加在光栅上的应力进行测量。
The PZT is modulated by periodicity voltage and the fiber grating fixing on the it is also modulated by PZT. The measured resolutions in experiment are good agreement with ones in theory.
用交变电压调制固定在光纤光栅上的PZT，同时对施加在光栅上的应力进行测量。
The PZT is modulated by periodicity voltage and the fiber grating fixing on the it is also modulated by PZT. The measured resolutions in experiment are good agreement with ones in theory.
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