实现小波变换调用upcoef 函数，根据近似（低频）分量和细节（高频）分量进行重构-Wavelet transform to achieve upcoef function call, according to approximation (low frequency) component and details (high frequency) component is reconstructed

db6小波分解upcoef重构与wrcoef重构的对比，可换成任意输入-db6 decomposition upcoef reconstruction compared with wrcoef reconstruction can be replaced by any input

一维小波单支重构函数，一维小波系数直接重构函数-Single one-dimensional reconstruction of wavelet functions, the direct reconstruction of one-dimensional wavelet function