It is proposed that the ratio of the fluctuation average to its rms value be implemented to inspect its random degree if the time-average is adopted as the ensemble average.

• 指出时间平均和样本平均作为近似系综平均可能存在的问题。对前者，建议用扰动量的统计系综平均值与它的均方根值的比值，来判断扰动量的随机性程度;