The paper simply reviews the application of quantification method in accident loss statistics, and proposes the method of mean square deviation analysis to determine the weight coefficient of 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。
The normal population characteristics, such as the mean, standard deviation, percentile, percentage and coefficient of 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。
Landscape features of the basin mean little difference between the standard deviation of the value of landscape features smaller basins, inter-month changes in runoff coefficient is more gentle.
景观功能均值相差不大的流域之间，景观功能值标准差较小的流域，月际间径流系数的变化更加平缓。
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