The sand density distribution inside the?'mould'after shooting has been calculated.
本文利用两相流理论模拟出射砂预紧实后的密度场分布；
Based on the digital mask technique, the distribution of sand area density and the sediment-transport rate in flow field were obtained.
采用图像处理的数字掩码技术，处理图像得到了沙粒在流场中的面密度以及单宽输沙率。
The level the anisotropic research, basing on the lamination factor, the sandstone density and the overlap coefficient describes the sand body growth and the distribution;
层间非均质性研究，通过分层系数、砂岩密度及重叠系数来描述砂层的发育与分布；
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