建立了再入机动弹道数学模型，给出了气动力系数为速度、迎角、高度的函数拟合式，进行了最佳再入机动弹道设计和仿真计算。
The mathematical model of reentry maneuvering trajectory is established. The fitting expression of aerodynamic coefficient function on velocity, attack of Angle and altitude is presented.
该方法利用与光轴对称的径向畸变数学模型求出光学镜头的校正系数，对畸变图像进行校正。
The method USES the model of radial nonlinear distortion with the symmetry of optical axis to obtain correction coefficients of the optical lens, and then corrects the distortion image.
本文从这一方法的数学模型入手，介绍重要性系数与评价矩阵的建立方法，并具有实例。
Presenting firstly the creation of the method's mathematical model, the paper introduces the aquisition of the important coefficient and the evaluation matrix, with an example to give an illustration.
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