Numerical results show that the two-level DCIM is an efficient method for calculating the closed-form Green's Functions.
数值结果表明，二级离散复镜像方法是一种快速、有效的求解闭式格林函数的方法。
In the two-level DCIM, the approximation is performed at two levels to reduce the time to fit the Green's functions with exponential functions so that the efficiency is improved.
二级离散复镜像方法将谱域格林函数分两步近似，减少了广义函数束方法对格林函数进行指数拟合的时间。
In the two-level DCIM, the approximation is performed at two levels to reduce the time to fit the Green's functions with exponential functions so that the efficiency is improved.
二级离散复镜像方法将谱域格林函数分两步近似，减少了广义函数束方法对格林函数进行指数拟合的时间。
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