... 首次碰撞剂量 first-collision dose 一阶修正 first-order correction 首面反射镜 first-surface mirror ...
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一阶修正项 first order correction
一阶误差修正模型 first-order error correction model
称为一阶误差修正模型 first order error correction model
据此即可分别推导出透射中间点和折射点的一阶修正公式，进行折射线逐段迭代计算求出整条射线路径。
Accordingly, the first-order modified formula for transmitted intermediate points and refracted points is derived and whole ray-path can be computed for refracted ray iteratively segment by segment.
普通的迎风差分格式只有一阶精度，修正的迎风差分格式可以把空间的计算精度提高到二阶。
This method could efficiently overcome the numerical oscillation and improve the calculation accuracy in spatial to second order.
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