摘要
指出了傅里叶变换存在的问题 ,针对其存在的精确性低和不适用于非平稳信号两大问题展开了讨论 ,分析了几种提高谱质量的校正方法 。
WT6BZ]This paper discusses two main problems of Fourier transform for its low accuracy and inaptitude to nonstationary signals,while giving several correct methods of improving spectrum quality This paper also gives a brief introduction to the fast-developing & widely-studied theory of wavelet transform and its application to failure diagnosis [WT6HZ]
