已调制信号计算其普相关密度，分析了该信号的时域、频域、倒谱，循环谱等,旋转机械二维全息谱计算的实用例程。- Modulated signals to calculate its density Pu-related, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Rotating Machinery dimensional hologram of practical spectrum calculation routines.