小波分析是当前应用数学和工程学科中一个迅速发展的新领域，经过近10年的探索研究，重要的数学形式化体系已经建立，理论基础更加扎实。与Fourier变换相比，小波变换是空间(时间)和频率的局部变换，因而能有效地从信号中提取信息。-Wavelet analysis is currently applied mathematics and engineering disciplines in a rapidly developing new fields, after almost 10 years of exploration and study, important mathematical formalization system has been established, theoretical foundation more solid. Compared with the Fourier transform, wavelet transform is a space (time) and frequency of the local transformation, which can effectively extract information from the signal.