说明：  随机序列产生程序,白噪声产生程序,M序列产生程序,二阶系统一次性完成最小二乘辨识程序,实际压力系统的最小二乘辨识程序,递推的最小二乘辨识程序,增广的最小二乘辨识程序
(random sequence generation process, white noise procedures for selecting the M series, Second-order system to complete a one-time least-squares identification procedures, the actual pressure on the least squares system identification procedures, recursive least squares identification procedures and increase the least squares identification procedures)