【摘要】 本文提出了一种新的时频分析方法—基于平滑技术的时频分析方法,并给出了该方法的基本原理以及用该方法对地震观测信号进行去噪的具体算法,它以信号的平滑处理为基础,与传统去噪手段相比,具有物理意义清晰且运算简单的优点.实验结果表明,利用该时频分析方法可以极大地提高远距离地震观测信号的信噪比,从而为远距离地震信号的检测提供了有力的工具.更多还原

【Abstract】 In this paper we propose a new time-frequency analysis method which is based on smoothing technique. The specific algorithm of applying this method to seismic-signal denoising is then amply introduced.Compared with the traditional means of denoising,the time-frequency analysis method proposed in this paper has such merits as clear physical meaning and simple operation.The results of experiments show that this method can greatly enhance the signal-to-noise ratio of seismic signals which are collected at remote observational stations.Therefore,this timefrequency analysis method can serve as a powerful tool when it comes to the remote detection of seismic signal.更多还原