静态切分窗口的曲线y=ax*x+10*x+10图，根据a在[-10，10]区间变化时，曲线随着变化-static window splitting the curve y = ax 10 * x * x 10 maps, in accordance with a [-10, 10] interval changes, in keeping with the changing curve

在某个音乐厅内，原始音频信号的回音由于墙壁和天花板等的反射而产生，听众所感受到的音频信号是 和它的回音的合成。令y(n)=x(n)+ax(n-k),其中x(n)=cos(0.3pin)+0.5cis(0.6pin),a=0.1,k=50.产生100个样本，使用Matlab工具，求出其自相关，从中观测确定a和k. -In a concert hall, the original audio signal echo the walls and ceilings due to the reflec