estimationsn.判断；尊重；估计量（estimation的复数形式）estimationn.判断；估计；尊重estimation of parameters参数估计estimation of population人口推算estimation of properties物性估算Estimation of the orders阶的估计estimation of consumption工料估算Estimation and assessment评价考核estimation of latent load潜在负荷估算estimation of repeat rate复现率估计Estimation of uncertainty不确定度评估estimation of burial time埋葬时间测定

1. 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。
2. The model is continued by imposing a polar coordinate system on the moving reference frame.
   通过把极坐标系作为该运动参照系而继续对模式进行积分。