峰态系数( coefficient of kurtosis)即“峰度”,是反映X的密度函数曲线在众数附近的“峰”的尖峭程度的数字特征。 设随机变量X的数学期望与方差统计学分别为EX和var(x)≠o,则称≤苌:毒筹£一3为x的峰度。
我也探讨了随时间变化的偏态系数与峰态系数对此模型表现之潜在的影响。
I also discuss the potential effect of time-varying skewness and kurtosis on the performance of the model.
本文从强震持时、频谱特性和能量分布峰态系数等三个方面对地震地面运动规律进行综合分析,提出了一种较为客观的地震地面运动分类方法。
In this paper, the law of earthquake ground motion is analyzed comprehensively by taking account of duration, frequency characteristic and peak index of energy distribution.
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