The problem of gravity field recovery can be attributed to the solution of over determinedsystem of equations.
重力场恢复最终归结为超定线性方程组的求解问题。
2
As to nonlinear determinedsystem, 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；
3
We cast these ranging measurements as a set of distance constraints, thus forming an over-determinedsystem of equations suitable for non-linear least squares optimization.