随后，基于图像复原统一能量泛函的欧拉·拉格朗日方程，导出一种非线性数字滤波器的统一设计框架。
The unified designing framework for nonlinear digital filters is subsequently derived, through solving the Euler-Lagrange equation of the unified energy functional.
在模型中，对液相采用欧拉法建立控制方程，对离散颗粒采用拉格朗日方法模拟。
In this model, governing equations of liquid were established with Eulerian approach, and discrete particle phase was simulated through Largrangian method.
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