但是真实地震动的归一化自相关函数则有一较显著的随机噪声项，这个随机噪声的幅值为0。15左右，这就是本文中所说的超随机特性。
But the normalized auto-correlation of real seismic acceleration record comprises an obviously random noise with amplitude value of 0.15 or so, that is so called super random content.
对相关函数进行时域滤波，挑选出互相关函数中窄信号自相关函数部分，去掉剩余的大部分噪声能量，得到加窗互相关函数（CCF）。
The time-domain filter can then be used to select the narrow central portion of the cross correlation function (CCF), capturing virtually all of the signal but rejecting most of the noise.
用数值方法计算了开启瞬态主模及第一边模的光强噪声及其自相关函数。
The numerical calculations of the variance and the autocorrelation function of the transient intensity noise in main mode and in the first side-mode are carried out.
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