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Empirical Mode Decomposition (EMD) is a decomposition algorithm which is used to analyze nonlinear and time-varying. Different from the traditional signal analysis method, the decomposition is data-driven and self-adaptive. EMD has been widely used in blind source separation and received attention because of its potential application in signal processing. EMD algorithm and its application in earth gravity tide signal are introduced. EMD is a potential method in the earth gravity tide signal. So we can extract useful information from it to understand earthquake precursors.

Analysis of Earth Gravity Tide Signal Based on EMD and Information Extraction