人体脑信号波形检测与分析，包含自相关，功率谱分析的方法-human brain signal waveform detection and analysis, including autocorrelation, power spectrum analysis method

利用Van der Pol范德波方程，仿真ECG信号，并计算其功率谱等参数-Fan Debo use Van der Pol equation, simulation ECG signal and calculate the power spectrum and other parameters