state estimation的用法和样例：
例句
- Linear measurement equation and linear static state estimation algorithm based right-angle coordinate are proposed when only PMU measurements are used.
在完全使用相量量测的情况下，提出了基于直角坐标系的实数形式的电力系统线性量测方程，和相应的线性静态状态估计算法。 - This paper also considers the estimation problems based on the different Cartesian coordinates.
本文还考虑了各传感器分布在不同地理位置时的状态估计问题。
