本文以肱骨横截面CT图像为解剖学基础，提取骨端面的几何形状，进行三维重建，建立肱骨的三维有限元模型。
Based on ct picture, the geometrical dimensions of humerus were obtained. A three-dimensional finite element model was established on the basis of three-dimensional reconstruction.
为了获取三维数值化概念机模型的浸润面积和横截面积等几何特性，本文提出了一种基于离散化面元的估算方法。
To estimate the geometric characteristics, especially wet areas and section areas, of three dimensional numerical conceptual aircraft models, a method based on surface elements is proposed.
我们留的作业是求几何体横截面的面积。
Our homework is figuring out the area of the cross section of a solid.
本文根据双螺杆横截面几何造型方程，运用MDT软件包，实现了同向和异向旋转双螺杆的三维实体造型。
According to the intermeshing mechanisms of co and counter rotating twin screws, the 3D solid modeling of twin screw was realized by using Mechanical Desktop(MDT) of AUTODESK in this paper.
结果表明：可以通过改变钻头横截面轮廓来得到不同的刀具几何形状，适用于不同的加工条件。
Result shows that different cutting edge can be got by changing DCSP according to different cutting condition.
结果表明：可以通过改变钻头横截面轮廓来得到不同的刀具几何形状，适用于不同的加工条件。
Result shows that different cutting edge can be got by changing DCSP according to different cutting condition.
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