LSQR and ART algorithms are applied separately to calculate tomography for the underdetermined system of equation.
分别采用LSQR和ART算法对欠定方程组进行了层析成像计算。
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。
LSQR and ART algorithms are applied separately to calculate tomography for the determined system of equation, overdetermined system of equation and underdetermined system of equation.
采用弯曲射线追踪算法计算走时，分别用最小二乘QR分解算法与代数重建技术就恰定方程组、超定方程组与欠定方程组进行了成像计算。
LSQR and ART algorithms are applied separately to calculate tomography for the determined system of equation, overdetermined system of equation and underdetermined system of equation.
采用弯曲射线追踪算法计算走时，分别用最小二乘QR分解算法与代数重建技术就恰定方程组、超定方程组与欠定方程组进行了成像计算。
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