系统辨识的输入信号为一个周期的M序列，从 中分离出并显示a1 、a2、 b1、 b2，画出输出观测值z的经线图形，并显示坐标网格-system identification of the input signal for a period of the M sequence, isolated from the show and a1, a2, b1, b2, paint output observation z warp graphics, and display Grid

彭纳投影，彭纳投影即等积伪圆锥投影。为法国人彭纳所创。中央经线是直线，其他经线为对称于中央经线的曲线。纬线为同心圆弧。中央经线和标准纬线上没有变形，离开这两条线越远变形越大。图上所有纬线都保持长度不变，面积相等。彭纳投影常用作大洲图。-Bonne projection that pseudo equal area conic projection. Penner was created by Frenchman. Central meridian is a straight line, the