The math model is achieved in the computer by ANSYS, and 3-D random aggregatemodel of concrete is established.
利用ANSYS将混凝土数学模型在计算机上实现，建立混凝土三维随机骨料模型。
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The Monte Carlo method was used to generate the random aggregatemodel, and the number of aggregate of different sizes was determined according to the actual mix proportion.
This paper develops a simple aggregatemodel of discrete-continuous demand to motivate how this correlation can be tested using simple regression techniques and readily available firm data.