本文提出利用反演理论对GIS数据进行质量评价，对超定、适定、欠定等问题分别求取相应解，为GIS数据质量的研究提出了新的思路。
In this paper, I put forward inversion theory assessing GIS data quality, gave respondence solution for different problem. This is a new clue to research for GIS data quality.
本文借助于变分法中求泛函极小化的方法提出求解超定大地边值问题的新方法。
A new method to solve over-determined geodetic boundary value problem is proposed with the help of minimizing some kinds of functional in variation calculus.
重力场恢复最终归结为超定线性方程组的求解问题。
The problem of gravity field recovery can be attributed to the solution of over determined system of equations.
另一类变量与向量函数呈非线性关系。 对于后一类变量，用弃舍随机方法先给出位置初值，然后将问题化为线性最小二乘问题，直接解超定方程组。
The overdetermined equations can be solved directly by using the rejection method to give the initial value of the position first and then converting the problem into a linear—square one.
该文研究超定盲信号分离，即观测信号个数不少于源信号个数情况下的盲信号分离问题。
The problem of overdetermined Blind source Separation (BSS) where there are more mixtures than sources is considered.
采用积分方程方法，研究了轴对称细长体后部非定常超空泡问题。
Based on an integral equation method, the unsteady supercavitating flow past slender body was studied.
采用积分方程方法，研究了轴对称细长体后部非定常超空泡问题。
Based on an integral equation method, the unsteady supercavitating flow past slender body was studied.
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