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 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.
在现场地质调查的基础上，对节理开度的概率分布函数进行了拟合，并进行了假设分布的有效性检验。
On the basis of field geology survey, the probability distribution function of joint aperture is fitted and the availability of the fitting is verified.
对气候要素的概率分布进行了讨论，根据这些概率分布的特点提出了多模态模型，并用非线性拟合的方法进行了验证。
The probability distributions of climatic elements are discussed. Based on the characters of them, a multimode model is introduced and verified through the nonlinear fitting.
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