In this paper, errors of digital levels are introduced. Calibration methods of the collimation error and the system accuracy are presented.
分析了数字水准仪系统的误差源，阐述了仪器i角误差和综合精度的检定方法。
Firstly, the velocity of target was educed from the secondary calibration to correct the collimation error, and the incorporated wind speed was introduced to simplify the model of fire control.
首先，运用二次标定法计算得到目标速度， 用以修正火控瞄准误差，并引入综合风速来简化火控计算模型；
Besides, artists produce the mobility of fresco by means of structure of "Tendentious Tension", collimation error, and psychological effect.
此外艺术家通过画面“倾向性张力”结构、视错觉、心理感受等手段使壁画产生流动感。
Besides, artists produce the mobility of fresco by means of structure of "Tendentious Tension", collimation error, and psychological effect.
此外艺术家通过画面“倾向性张力”结构、视错觉、心理感受等手段使壁画产生流动感。
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