数字信号处理的Matlab实现的随书光盘，有时谱分析、小波变化、地震观测系统仿真与地面运动恢复等几个数字信号前沿课题，有实用价值-Digital signal processing with Matlab realized the book CD-ROM, and sometimes spectral analysis, wavelet changes in observing system simulation of earthquake ground motion and the resto