采用将有限声束分解为一系列平面波的方法，对有限声束在液体-固体板-液体结构中的声反射问题进行了分析和计算。
Analysis and numerical computation have been performed for the reflection of acoustic beam on the solid plate surface of layered structure: liquid solid plate liquid.
采用的是通用的平面波展开法，已经调试成功。内含m文件，可直接运行，Pisarenko谐波分解算法。
Using common plane wave expansion method, Has been successful debugging. M contains files can be directly run, Pisarenko harmonic decomposition algorithm.
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