The paper simply reviews the application of quantification method in accident loss statistics, and proposes the method ofmean square deviation analysis to determine the weight coefficientof simples.
简要介绍了事故损失统计中一些量化方法的应用，同时提出用方差分析来确定加权系数的取舍。
2
The normal population characteristics, such as the mean, standard deviation, percentile, percentage and coefficientof variation, are often tested in engineering.
正态母体特征值（母体均值、百分位值、百分率、标准差和变异系数等）的检验是工程中常见的问题。
3
Landscape features of the basin mean little difference between the standard deviationof the value of landscape features smaller basins, inter-month changes in runoff coefficient is more gentle.