研究了求解区域有凹边界存在时边界结点数对求解精度的影响。
The influence of node Numbers in a non-convex boundary on the solution accuracy is investigated.
用常规的幂强化公式计算药筒在引伸后的强度时，数值偏低较多，原因是该公式未考虑引伸凹模锥角对强化的影响。
But the strength of the cartridge case after ironing drawing cannot be accurately calculated by this formula, because the result of calculation is lower than that reached in practice.
对圆柱面——平面型平凹柱透镜和棱镜的扫描角放大特性进行了分析比较。
The planoconcave cylinder lens and prism properties of angular magnification in light scanning are analysed in the paper.
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