【摘要】 地震反射是典型的非平稳信号,地震谱分解实质上就是连续时频谱分析。谱分解为一非惟一的过程,可供选用的算法很多。每种算法既有优点,又有缺陷。为了达到精确应用的目的,选用适当的算法十分重要。在对目前常用的几种谱分解算法介绍的基础上,结合其中一些方法的谱分解结果,对各种算法的时间、频率分辨率进行了对比分析,指出了各类算法的局限性,并针对不同用途指出了适用的谱分解方法。更多还原

【Abstract】 Seismic signal is a typical of non-stationary signal.Spectral decomposition in essence is a continuous time-frequency analysis of a seismic trace.Since time-frequency mapping is a non-unique process,there exist various ways for time-frequency analysis of non-stationary signals.Each algorithm has both advantages and disadvantages.It is very important to choose a suitable method for effective application of the technology.Based on a review of literatures,this paper described methods for performing spectral decomposition.The spectra from different methods were compared and analyzed in terms of resolution and localization in time and frequency domain.The factors affecting spectral decomposition were also discussed.Moreover,effective approaches were proposed according to different applications.更多还原