【摘要】 针对FFT方法在地震波优化处理中的不足,基于改进的小波理论——小波包理论,实现了一种新的地震波优化方法.以实际记录的迁安波(南北向)为例,利用数学软件MATLAB进行编程,降低地震波高频噪声干扰和简化地震波有效特征向量,并对优化效果、不同参数的选择进行了分析.其结果表明:利用小波包可以实现对地震波的降噪和压缩,且地震波保持了应有的相似性和光滑性.更多还原

【Abstract】 Aim at the shortage of the FFT method in optimizing to earthquake wave,a theory of wavelet packet was proposed,which is based on the improved wavelet theory.A new method of optimizing earthquake wave was come true.Taking the actual Qian’an wave record for example,programming by using mathematic software-MATLAB,so as to reduce the jam of high-frequency in earthquake wave and simplify the effective characteristic vector of the earthquake wave and further to analyze to optimizing effects and varying vector. The results proves that,it can realize de-nosing and compressing to earthquake wave by using wavelet packet and the earthquake wave maintained similarity and smoothness which should have.更多还原