...:易损性； 几何描述； 暴露面积； 威胁方向； 平行投影； 图像处理 [gap=976]Key words: vulnerability; geometric description; presented area; threat orientation; parallel projection; image processing ..
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geometric description algorithm 几何描述算法
geometric shape description 几何形状描述
geometric surface description 几何曲面描述
Narrowing the size of mesh can reduce the error, but the computer time of geometric description increased.
缩小射击线网格的大小可以减少几何描述的误差，但增加了计算机的计算时间。
The result shows that the method is feasible and can guarantee the accuracy of the geometric description of aircraft, increase calculation efficiency.
算例表明，该方法易于实现，而且能够在保证飞机几何描述的精度的同时，提高计算效率。
Two key issues concerned in this paper are as follows: (1) geometric description of the joined-wing aircraft configurations with a relatively small number of parameters;
实现这一方法的要点有：（1 ）建立一个合理的联结翼飞机外形的参数化几何模型；
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