摘要
介绍了小波变换的基本概念和特性。应用小波变换对岩石超声波检测信号进行了时频分析和处理。结果表明,该方法是分析处理具有时变谱特性的非平稳信号的一种有效方法。
Concepts and characteristics of wavelet transform are described in the paper- The results derived from applying wavelet transform to perform time-frequency analysis and processing of rock ultrasonic testing signals show that the technique forms an effective one for analyzing and processing unstable signals of time- variation spectra.
引文
1Daubechies I. The wavelet transform time-frequencylocalization and signal analysis.IEEE Trans(InformationTheory), 1990, 36: 961~1004
2 李世雄小波变换及其应用.北京:高等教育出版社,199711~13
3余度金,刘益成,黄载禄小波变换用于地震测井信号的多分辨率分析.石油地球物理勘探,1994,29(4):444
4 Mallats.Atheory for multiresolution signal decompositionthe wavelet representation. IEEE Trans(Patern Anal MachineIntell) 1989, 31: 674~693