In track simulation, the corresponding earth equivalent radius of a track in a specific range is approximate to the earth curvature radius of the latitudinal location of the target.
介绍了在航迹模拟中，一条航迹在一定范围内对应的地球等效半径，可以近似为目标所在的纬度的地球曲率半径。
Based on the corneal data, the effects of equivalent refractive index and error in radius of curvature on the corneal vergence measurement after refractive surgery are studied theoretically.
在角膜数据的基础上，从理论上分析了等效折射率和曲率半径测量误差对屈光手术后角膜光焦度测量的影响。
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