用于信号的多分辨率分解和重建。调用函数子程序wavelet_decwavelet_rec使用 A trous 算法；在分解的过程中，同时给出各级的细节和概貌，它们和原数据有着同样的长度。-For multi-resolution signal decomposition and reconstruction. Wavelet_decwavelet_rec subroutine calling function using A trous algorithm　in the decomposition process, and gives details of all levels and profiles, they have the same length of the original data.