放射投影;放射型投影
Both of the observed radial velocity and separation being projective values, in order to determine the mass of binary galaxies the average projection factor may be derived by a statistical method.
双重星系或天体系统,用动力学方法测定其质量时,观测到的视向速度和距离间距,都是各自值的投影值,可用统计方法,求出一个关于它们的平均投影因子。
Fast terrain matching algorithm based on radial projection transform
基于径向投影变换的快速地形匹配方法
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