The correct solution can not be obtained for the original input data, even though the impedance matrix is not ill conditioned.
对于原始的输入数据，不可能得到正确的结果，尽管阻抗矩阵并不是病态的。
If the coefficient matrix of the normal equation is ill-conditioned, the statistical character of adjustment parameter will become poor.
当法方程的系数矩阵呈病态时，平差参数的统计性质就要变坏。
The computational results demonstrate that the partial root root estimator can improve the LS estimator when the design matrix is ill conditioned.
计算结果表明，在设计阵呈病态时，部分根方估计确能改善LS估计。
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