本文分采用一阶统计特征： 幅度概率分布（Amplitude Probability Function, APDF ）和二阶统计特征：自相关 （AutoCorrelation Function），对杂波进行统计建模。
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The loads and the distribution of stress amplitude frequency are obtained by cycle count and reliable data for fatigue design are provided by probability density function fit.
用循环计数法求出载荷及应力幅频率分布，用概率密度函数拟合，为疲劳设计提供可靠性高的数据资。
It is pointed out that the wave function of system can be exactly solved if the perturbation only depends on the time, and the exact expression of transition probability amplitude can be obtained.
本文通过计算指出，若微扰只与时间有关，则体系的波函数可以精确求解，从而得到跃迁概率振幅的精确表达式。
The amplitude spectrum line and the amplitude spectrum function are proposed for the airborne particle scattering light signal, and their properties are studied in probability space.
针对粒度仪标定的准确度 ，在概率空间基础上 ，提出了尘埃粒子散射光信号幅度概率谱线和散射光信号幅度概率谱函数的概念 ，并对谱线在概率空间下的性质进行了研究。
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