基于MATLAB的小波阈值去噪方法的研究（其中包括软阈值方法，硬阈值方法，广义小波阈值函数，自适应特征阈值等方法的代码）-MATLAB-based wavelet threshold denoising (including soft-thresholding method, hard threshold method, generalized wavelet thresholding function, adaptive threshold methods such as feature co