quadratic approximation

基本解释

The expression of the long-term optical-beam spreading radius is obtained by a quadratic approximation.
通過二次方近似得到了長期光束擴展半逕表達式。
The CCT is determined by the crossing point of the quadratic approximation surface and the continuous faulted trajectory.
基於故障後電力系統穩定域邊界的二次近似來估計臨界切除時間。
Having adopted the quadratic approximation of potential, we can solve the equation and get the approximately analytical solutions of Gaussian typed breath mode.
對勢函數採用二堦近似後，求解此方程得到高斯型呼吸模式的光束寬度的近似解析式。