采用不同的消失矩的小波函数来分解一个信号，验证了消失矩增大时,它的高频分量中的零原来越多，因此，通常我们都愿意采用消失矩较高的小波函数。-Different vanishing moments of wavelet function to decompose a signal to verify the vanishing moments increases, it is zero in the high-frequency components more original, so often we are willing to adopt a higher vanishing moments of wavelet function.