数值算法

Based on the mathematical model and the Romberg numerical integrating algorithm, an array with 40 sets of data was obtained to describe the aspheric surfaces. By fitting the data with the method of the nonlinear least square, the sag's analytical equations of aspheric surfaces were obtained.

根据基于几何光学原理导出的系统理论模型，采用龙贝格数值积分算法得到40组描述非球面的数据，非线性最小二乘法拟合数据，获得两个非球面矢高解析式。

In this paper the shallow water equations in the Lagrangian coordinate s were derived and the numerical solutions were found out for shallow water problem with moving boundary by using a 2 order Godunov scheme.

移动边界问题是水力计算中难点之一，本文用拉格朗日坐标系来描述浅水方程，并用二阶Godunov算法求解有移动边界的浅水问题的数值解。

In this paper the shallow water equations in the Lagrangian coordinates were derived and the numerical solutions were found out for shallow water problem with moving boundary by using a 2 order Godunov scheme.

移动边界问题是水力计算中难点之一，本文用拉格朗日坐标系来描述浅水方程，并用二阶Godunov算法求解有移动边界的浅水问题的数值解。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。