quadratic approximation

基本解释

The expression of the long-term optical-beam spreading radius is obtained by a quadratic approximation.
通过二次方近似得到了长期光束扩展半径表达式。
The CCT is determined by the crossing point of the quadratic approximation surface and the continuous faulted trajectory.
基于故障后电力系统稳定域边界的二次近似来估计临界切除时间。
Having adopted the quadratic approximation of potential, we can solve the equation and get the approximately analytical solutions of Gaussian typed breath mode.
对势函数采用二阶近似后，求解此方程得到高斯型呼吸模式的光束宽度的近似解析式。