说明：  计算诺特方程求解平面纵波入射到水平界面时的纵波反射系数与转换波反射系数 matlab图形化界面，输入上下两层介质的纵横波速度与密度即可，使用方便
(Knott equations to calculate longitudinal wave reflection coefficients and converted wave reflection coefficient matlab graphical interface, enter the upper and lower layers medium density and shear wave velocity and longitudinal wave incident on a plane at the level of the interface can be easy to use)