Nonlinear adaptive multigrid FEM for simulating multi - step excavation process was studied.

开发了模拟多步开挖过程的非线性自适应多重网格有限元方法.

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The effective method involves water drive hydrocarbon migration model, multigrid and LSQR iteration.

该法是以水动力为油气运移模型,采用LSQR迭代 、 多重网格的加速计算方法.

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