Aim To study dynamical character of system using continuity equation of laser.
目的用激光连续方程研究激光系统的动力学行为。
The stage-discharge curve at the downstream boundary is combined with the continuity equation of the St.
本文基于河道下断面的水位流量关系和连续方程的联立求解 ，导出了水位流量关系型的下边界条件。
Based on the continuity equation of ground water and the variation principle, the seepage differential equation can be acquired.
根据地下水的连续方程和变分原理建立渗流场微分方程。
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