用回声隐藏方法实现数字水印的许多程序，欢迎共享-This is some water echo code,I spend a lot of time on it.

计算加权加速度,计算目标和海洋回波的功率谱密度,用于时频分析算法。- Weighted acceleration, Calculating a target and ocean echo power spectral density, For time-frequency analysis algorithm.