denoise2

代码说明：

  本程序是基于LeventCode平台作的。包括以下方法：BivaShrink方法、模型1、模型2、模型3（TrivaShrink方法）、BayesShrink方法、LAWMLShrink方法的DWT实现和DT_CWT实现(This procedure is based on the platform for LeventCode. Including the following methods: BivaShrink method, model 1, model 2, model 3 (TrivaShrink method), BayesShrink methods, LAWMLShrink methods DWT realize and realize DT_CWT)