A novel method about two dimension Fourierfrequency 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。
2
The acceleration process caused by Yuanyuan M5.8 Earthquake at the top of Ertan Reservoir Dam and its Fourierfrequency 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。
3
With a phase grating located at Fourierfrequency plane, optical image subtraction is obtained as a result of the coherent superposition of the zeroth and the first order of the diffracted light.