wavelets are used extensively in signal and image processing,Medicine, Finance, Radar, Sonar, Geology and many other varied fields. They are usually presented in mathematical formulae, but can actually be understood in terms of simple comparisons

in this code random noise is denoise by wavelet and find the parameter for best wavelets

小波的应用，需要用到小波基。例如在信号处理的各种应用中。用小波基才能生成小波函数。-Wavelet applications require the use of wavelet bases. Such as in various applications of signal processing. Wavelets can be used to generate wavelet functions.