The Fresnel wave ray equation is deduced by use of the fundamental equations of crystal optics. The crystal optics question is solved by Fresnel wave ray equation cooperating with Maxwell equation.
利用晶体光学基本方程推导出菲涅耳波射线方程，通过波射线方程并结合麦克斯韦方程组求解晶体光学问题。
Gaussian beam method is essentially a seismic forward modeling method that combines wave equation and ray theory.
高斯射线束方法是将波动方程和射线理论相结合的一种地震正演模型方法。
Gaussian beam is the asymptotic solution of wave equation concentred at the central ray.
高斯束是波动方程在特定射线附近的高频渐近解。
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