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。
The probability distribution of gene frequency was studied by simulative method in finite population.
本文采用计算机模拟的方法，对有限群体中基因频率的概率分布进行了研究。
A comparison of the two displaying methods of cooling-load rate distribution, that is, time frequency chart and probability distribution curve, is made.
对时间频数图、概率分布图这两种负荷率分布的表示方法进行了比较。
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