说明：  这是一个Matlab的小波去噪的程序，达到的效果还是很理想的，所以拿出来跟大家分享，希望学习小波的童鞋可以一起讨论
(This is a Matlab wavelet denoising program, achieve the effect still is very ideal, so get out and share with you, wish to learn of the wavelet kids could get together and discuss)