The theoretical calculation result indicates that the three-dimensional tooth arrangement model of PDC Bit's with the parameter method is precise and reliable.
理论计算结果表明，利用这种参数化建模方法完成的PD C钻头三维布齿模型是精确、可靠的。
Model equations for three dimensional calculation are given. Special treatment of boundary conditions at the entrance and the inclined wall is carried out.
给出了三维流场计算的模型方程，对倾斜壁面及入口的边界条件作了特殊处理。
The present paper deals with a reactor network comprehensive model for the engineering use orented three dimensional heat transfer numerical calculation of utility boiler furnaces.
文中介绍一种适合于工程应用的电站锅炉炉膛三维传热值计算的反应器网络综合模型；
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