对“Blocks”信号加上高斯白噪声，再用 db3 小波进行分解,以说明三种取阈值方法和三种噪声标志对去噪性能的影响。-right "Blocks" signal with white Gaussian noise, and then db3 wavelet decomposition, to illustrate three thresholding methods and three noise signs of de-noising performance.

1、先生成一个“Blocks”信号 2、加上高斯白噪声 3、用 db3 小波进行分解，以说明信号和噪声在各个尺度上的表现。-1, the President as a "Blocks" signal 2, and 3 Gaussian white noise. db3 using wavelet decomposition, to illustrate the signal and noise in various scales performance.