This program simulates wave propagation on the plane which I called membrane . Really it is based on the grid of pixel points connected by springs. Model is very simplified but it is possible to observe some wave effects such as diffraction.-This pro

是一种双隐层反向传播神经网络，用平面波展开法计算二维声子晶体带隙,进行波形数据分析。- Is a two hidden layer back propagation neural network, Computation Method D phononic bandgap plane wave, Waveform data analysis.

Computation Method D phononic bandgap plane wave, Various kalman filter design, Is a two hidden layer back propagation neural network.

采用时域有限差分法模拟了电磁波在一维空间传播的情况，其中电磁波为平面波，激励源为正弦波，程序中没有加入吸收边界条件(The finite-difference time-domain method is used to simulate the propagation of electromagnetic waves in one-dimensional space. The electromagnetic wave is a plane wave, the excitation source

建立水声信道的射线模型在工程应用上有重要的意义。射线声学是把声波的 传播看作是一束无数条垂直于等相位面的射线的传播，每一条射线与等相位面相 垂直，称为声线。声线途经的距离代表波传播的路程，声线经历的时问为波传播 的时间。声线束所携带的能量即为波传播的声能量。与几何光学相似，射线声学 的描述方法给人直观的感觉，在一定的条件下，射线声学的数学运算也比较简捷， 由射线理论给出的声线图可以给声场以直观、形象的理解。 本模型可以准确的衡量声波在海洋中传播路径(Establishing ray