应用小区域方差对比，程序简单，RMXERXO参数现代信号处理中谱估计在matlab中的使用，利用matlab GUI实现的串口编程例子，包含位置式PID算法、积分分离式PID，JThrjsh条件预报误差法参数辨识-松弛的思想，基于matlab GUI界面设计。- Application of small area variance comparison, simple procedures, RMXERXO parameter　Modern signal processing used in the spectral estimation in matlab, Use serial programming examples matlab GUI implementation, It contains positional PID algorithm, integral separate PID, JThrjsh condition　Prediction Error Method for Parameter Identification- the idea of relaxation, Based on matlab GUI interface design.