weighted observation的意思|示意

In this case optimally weighted LS estimate is not a linear estimate of a parameter given input and observation anymore and can not be compared with linear minimum variance estimate.

在这种情况下，最优加权最小二乘估计变成关于观测和输入的非线性估计，且与线性最小方差估计不可比。

Each observation could have been weighted inversely as the distance or as the square root of the frequence.

每次观测可以倒过来加权作为距离或作为频率的平方根。