标准摘要
[中文适用范围]： ISO 9276 的这一部分提供了用于计算矩、平均粒径和给定粒径分布的标准偏差的相关方程和一致术语。 描述了两种常用的符号系统。 一种是矩量法，第二种是矩比法。 尺寸分布可以直方图或分析函数的形式提供。 任何形状的颗粒的当量直径被视为该颗粒的尺寸。 不考虑颗粒形状因素。 鉴于尺寸结果对测量原理的依赖，有必要在报告中说明测量技术。 测量的颗粒样本旨在代表颗粒群。 对于这两种表示法系统，附件中提供了根据直方图数据计算平均粒径和标准偏差的数值示例。 如果评估的分布不完整，则平均粒径的准确性可能会降低。 当使用非常有限数量的尺寸类别时，精度也可能会降低。 [外文原描述]： 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.
英文名称Representation of results of particle size analysis — Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions