说明：  这是一个用C语言写的小波变换的算法程序。。可以应用到单片机和DSP实时处理数据，如去噪，去除趋势项，提取所需的信号等。
(This is a C language wavelet transform algorithm. . MCU and DSP can be applied to real-time processing of data, such as de-noising, removal of the trend items, extract the desired signals.)