ISO 9276-2:2014为力矩、平均粒径和给定粒径分布的标准偏差的计算提供了相关方程式和连贯术语。描述了两种常用的符号系统。一种是力矩法，另一种是力矩比法。大小分布可以是直方图或分析函数。 任何形状的颗粒的等效直径被视为该颗粒的大小。不考虑颗粒形状因素。 测量的颗粒样品旨在代表颗粒总体。 对于这两种符号系统，平均粒径和直方图数据标准偏差计算的数值示例见附录。

ISO 9276-2:2014 provides relevant equations and coherent nomenclatures for the calculation of moments, mean particle sizes and standard deviations from a given particle size distribution. Two notation systems in common use are described. One is the method of moments while the second describes the moment-ratio method. The size distribution may be available as a histogram or as an analytical function. The equivalent diameter of a particle of any shape is taken as the size of that particle. Particle shape factors are not taken into account. Samples of particles measured are intended to be representative of the population of particles. For both notation systems, numerical examples of the calculation of mean particle sizes and standard deviation from histogram data are presented in an annex.