Then a similar intergrid transfer operator is given for the spaces of velocity, and the W-cycle multigrid method is presented for solving the algebraic equations.
接着对速度空间提出一种类似的网格转移算子，并给出W循环的多重网格法来解对应的代数方程组。
The operator is characterized by low order equation, imaging for steep dip and adapting for any changes in velocity field.
该算子具有方程阶数低且能对陡倾角成像的特点，能适应速度场的任意变化。
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