旋转机械二维全息谱计算的实用例程，Gabor小波变换与PCA的人脸识别代码，窗函数法设计一个数字带通FIR滤波器。- Rotating Machinery dimensional hologram of practical spectrum calculation routines, Gabor wavelet transform and PCA face recognition code, A window function design FIR digital band-pass filte