DE (differential evolution) algorithm-based gravity earth tide signal independent component analysis method

A technology of independent component analysis and solid tide, which is applied in the field of signal processing, can solve the problems that the harmonic component and the gravity solid tide generation mechanism cannot be one-to-one correspondence, and the harmonic component cannot be revealed, and achieve the effect of improving the sensitivity of the initial value
CN106570529AActive Publication Date: 2017-04-19KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2017-04-19

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Abstract

The present invention provides a DE (differential evolution) algorithm-based gravity earth tide signal independent component analysis method and belongs to the signal processing field. The method mainly comprises gravity earth tide signal three-dimensional orthogonal decomposition model-based analysis, gravity earth tide signal preprocessing, DE algorithm parameter setting, objective function optimization and gravity earth tide signal independent component analysis. According to the DE (differential evolution) algorithm-based gravity earth tide signal independent component analysis method of the invention, the three-dimensional orthogonal decomposition model of gravity earth tide signals is built; orthogonal decomposition of the harmonic component of the gravity earth tide signals is realized in the aspect of space, so that an extracted harmonic component frequency can reflect spatially independent geophysical information; and the DE algorithm is introduced into a traditional ICA algorithm, so that the defects of low convergence rate and local contraction of the ICA algorithm can be effectively avoided. The DE (differential evolution) algorithm-based gravity earth tide signal independent component analysis method is a novel method which can effectively perform orthogonal analysis on earth tide signals.
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Description

Technical field

[0001] The invention relates to an optimization algorithm, in particular to an independent component analysis method of a gravity solid tide signal based on a DE (differential evolution) algorithm, and belongs to the field of signal processing. Background technique

[0002] Under the action of the gravitational force of the sun, moon and other celestial bodies, the earth will produce elastic deformation. The observable geophysical signal reflecting this phenomenon is the gravitational solid tide signal. The gravitational solid tide signal reflects the periodic changes of the tidal gravity of celestial bodies such as the sun and the moon. If the tidal gravitational components of each celestial body can be separated separately from them, and the superposition relationship between these components can be revealed, the law of gravity action between celestial bodies can be more deeply understood.

[0003] The gravitational solid tide signal contains abundant tidal harmon...

Claims

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