完成一维小波变换一级分解。此文件包含小波变换的mallat算法，经测试完全正确。-Completed a one-dimensional wavelet transform decomposition. This file contains the mallat wavelet transform algorithm, the test is correct.

实现小波变换mallat算法2层分解，经测试完全正确。-Mallat implementation of wavelet transform decomposition algorithm for layer 2, the test is correct.

此文件配合小波变换mallat算法分解重构使用，能够完成整个设计。-This file with the wavelet transform decomposition and reconstruction algorithm mallat used to complete the entire design.