“程差”是天文学专有名词。来自中国天文学名词审定委员会审定发布的天文学专有名词中文译名，词条译名和中英文解释数据版权由天文学名词委所有。
15 显示绕射面是一个相位面（phase surface），光在相邻的凹槽间波长光 程差（path difference）的整数倍相关的方向上发出。
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光程差 [光] optical path difference ; OPD ; Optical distance difference
高程差 difference of elevation ; depth displacement ; altitude difference ; curve displacement
干程程差 interference path difference
远程差分压缩 RDC ; Remove Differential Compression
传播路程差 propagation difference
声程差 path difference
光程差参数 Referece OPD
零过程差异 zero process gaps
日程差异 schedule variance ; SV ; odchylenie od harmonogramu ; aikatauluvarianssi
基于通用有限元软件和地基阻抗力时域差分形式，完成了考虑土–结构动力相互作用影响的结构时程分析程序二次开发。
By use of general FEM software and the time-domain difference of ground resistance, the structure history analysis programs with consideration of soil-structure dynamic interaction was developed.
应用有限差分法求解球壳振动的振幅和外加荷载之间的微分关系，得到了球壳振动的时程和相图。
The time history curves and the phase diagram for the oscillation are obtained by solving the differential relation between vibration amplitude and tensile load with finite difference method.
当前实用性较强的射线追踪方法，包括波前法，最短路径法，走时插值法，程函方程有限差分法等。
More practical ray tracing methods currently include the wavefront method, the shortest path method, the travel time epenthesis method, the eikonal equation finite difference method, etc.
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