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.
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