摘要：收集了颗粒表面粗糙度的7种定义，对其适用性进行了定量评估。

关键词：颗粒；表面粗糙度；曲率

Abstract：The seven definitions with regard to surface roundness of the particles have col-lected in this paper ,and their suitabilities are evaluated quantitatively.

Keywords：particle ;surface roundness;curvature