乒乓游戏 ，led流水灯控制乒乓球，按键控制甲方已方操作。详细说明看readme-ping-pong game, led lights to control water table tennis, has been chosen to control keys to operate. Details see readme

matlab 频谱分析演示，居于DCT的-spectrum analysis using matlab，base on the dct

设计信号用快速傅里叶变换求信号频谱功率谱-Fft spectrum signal design requirements