The problem of gravity field recovery can be attributed to the solution of over determined system of equations.
重力场恢复最终归结为超定线性方程组的求解问题。
As to nonlinear determined system, a criterion was presented in light of the linear equivalent stability principle;
对非线性确定性系统，利用稳定性的线性等价原理，提出了这一类非线性系统的稳定性判据；
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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