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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

Active Publication Date: 2017-04-19
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

Although this type of method can perform global analysis on the gravity solid tide signal, it cannot fully reveal the relationship between the harmonic components in the gravity solid tide signal when the signal is analyzed locally. The generation mechanism cannot be one-to-one

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

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Embodiment 1

[0029] Embodiment 1: The independent component analysis algorithm based on DE algorithm proposed by the present invention, such as figure 1 As shown, including the following steps:

[0030] 1) Analyze the orthogonal model of the gravity tide signal, such as figure 2 In the figure, for a certain observation point A on the earth, considering that it is affected by the rotation of the earth and the tidal force of the sun and the moon, the solid tide caused by it is set as F. F can be decomposed into two orthogonal signals: ground tilt Earth tide signal F h And gravity tide signal F g . In this paper, the gravity tide signal F g Perform analysis, F g It can be decomposed into two orthogonal vectors: a signal component F parallel to the equatorial plane 1 , A signal component F parallel to the rotation axis of the earth 2 , F 1 It can be orthogonally decomposed into 2 signal components F 11 And F 12 In this way, the gravity tide signal is orthogonally decomposed into three-dimensional...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06N3/12
CPCG06N3/126G06F18/2134
Inventor 全海燕高略
Owner KUNMING UNIV OF SCI & TECH
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