With the aid of the method for determining damping ratio in structural dynamic experiment the so called stationarity index is used to estimate the gentleness of the peak's slope.
借助结构动力试验中阻尼比的确定方法，提出用平稳度指数来评价单峰点包线函数平缓程度。
According to the safe slope ratio of earth-filled core wall and the seepage calculation of earth dam, a simple method to calculate the core wall thickness of earth dam is given.
文章从心墙填筑填土料的安全渗透比降为基础，结合土坝的渗流计算，得出土坝心墙厚度的简便计算方法。
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