求解寻迹方程，便得到曲面绕射线的轨迹和边缘绕射点的位置，从而可以计算它的绕射场。
By solving these equations, the diffraction trace of a curved surface and the position of the edge's diffraction point are determined so that the diffraction field can be obtained.
是强有力的x射线源，中子星绕中心旋转。
通过“钱德拉”X射线绕轨太空望远镜对星系团的增长模式进行观测研究，他们发现，正如“暗能量”理论预测的一样，星系团的增长受到了抑制。
They used an orbiting X-ray telescope called Chandra to study the way that clusters of galaxies grow. They discovered that this growth is stifled in exactly the way that dark-energy theory predicts.
本文提出一种按速度模型计算绕射波射线旅行时和进行绕射归位的方法。
This paper presents a method for calculating travel time of diffracted wave from velocity model and for making diffraction migration.
本文提出一种按速度模型计算绕射波射线旅行时和进行绕射归位的方法。
This paper presents a method for calculating travel time of diffracted wave from velocity model and for making diffraction migration.
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