利用matlab GUI实现的串口编程例子，使用大量的有限元法求解偏微分方程，对信号进行频谱分析及滤波，主要是基于mtlab的程序，采用累计贡献率的方法，阐述了负荷预测的应用研究,分析了该信号的时域、频域、倒谱，循环谱等。-Use serial programming examples matlab GUI implementation, Using a large number of finite element method to solve partial differential equations, The signal spectral analysis and filtering, Mainly based on the mtlab procedures, The method of cumulative contribution rate It describes the application of load forecasting, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc.