A novel method about two dimension Fourier frequency analysis is proposed in order to obtain high radial rotate precision.
为了改善高速磁浮主轴的径向回转精度，该文提出了二维傅里叶频率分析的新方法。
The acceleration process caused by Yuanyuan M5.8 Earthquake at the top of Ertan Reservoir Dam and its Fourier frequency spectra are analyzed.
介绍了盐源5 8级地震二滩大坝顶部的加速度时程及傅氏谱。
With a phase grating located at Fourier frequency plane, optical image subtraction is obtained as a result of the coherent superposition of the zeroth and the first order of the diffracted light.
置一位相光栅于相干光学处理系统频谱平面，利用其零级与一级衍射光的相干迭加实现图象相减。
应用推荐