Stochastic Models of Sand Transport by Wind and Two Related Estimation Problems
提出了风沙输运的随机模型和平衡条件,用最大熵估计沙粒起跳速度分布,并基于输运率数据估计颗粒碰撞模型参数,适合研究风沙动力学的学者参考。
A stochastic model of sand transport by wind and some related equilibrium conditions are presented. Maximum entropy estimation of the probability distribution of the velocity with which sand grains take off from the surface is considered. A parametric model of grain/bed collisions is given, and the parameters are estimated. The data are in both cases measurements of transport rates at a number of heights and wind speeds. Also a short review is given of papers where problems related to sand transport by wind are approached by statistical or probabilistic methods.