用谱方法计算流体力学一些流动现象的整体稳定性,解耦，恢复原信号，FIR 底通和带通滤波器和IIR 底通和带通滤波器。- Spectral methods of computational fluid dynamics flow of some of the overall stability of the phenomenon, Decoupling, restore the original signal, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter.