...等于αβ ’ ，为长期冲击矩阵(long-run impact matrix)， 反映出长期讯息；α称为调整系数矩阵 (adjustment coefficient matrix)，作为衡量误差修正项 反馈校正机能的强弱，当α愈大表示收敛的速度愈快；β则为共积向量。
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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 total least squares (TLS) are a new method in adjustment in recent years. Different from the least squares (LS), the errors in coefficient matrix and observations are considered simultaneously.
总体最小二乘方法(TLS)是近年来出现的一种较新的平差方法，与传统最小二乘方法(LS)不同的是，TLS可以同时顾及系数矩阵及观测值的误差。
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