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An Independent Component Analysis Method of Gravity Solid Tide Signal Based on de Algorithm

An independent component analysis, solid tide technology, applied in the field of signal processing, can solve the problem that the harmonic component and the gravitational solid tide generation mechanism cannot be one-to-one correspondence, and the harmonic component cannot be revealed, and achieves the effect of improving the sensitivity of the initial value.

Active Publication Date: 2019-07-16
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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  • An Independent Component Analysis Method of Gravity Solid Tide Signal Based on de Algorithm
  • An Independent Component Analysis Method of Gravity Solid Tide Signal Based on de Algorithm
  • An Independent Component Analysis Method of Gravity Solid Tide Signal Based on de Algorithm

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Embodiment 1

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

[0030] 1) Analyze the orthogonal model of the gravity solid tidal signal, such as figure 2 In the figure, for a certain observation point A on the earth, under the consideration that it is affected by the earth’s rotation, the tidal force of the sun and the moon, let the solid tide caused by it be F, and F can be decomposed into two orthogonal signals: ground tilt Solid tide signal F h and the gravitational solid tide signal F g . In this paper, the gravitational solid tide signal F gfor analysis, F g can be decomposed into two orthogonal vectors: a signal component F parallel to the equatorial plane 1 , a signal component F parallel to the Earth's rotation axis 2 , F 1 It can be decomposed orthogonally into two signal components F 11 and F 12 , so that the gravitational solid tide signa...

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Abstract

The invention provides an independent component analysis method of a gravity solid tide signal based on a DE algorithm, belonging to the field of signal processing. The method mainly includes the analysis based on the three-dimensional orthogonal decomposition model of the gravity solid tide signal, the preprocessing of the gravity solid tide signal, the parameter setting of the DE algorithm, the optimization objective function, and the independent component analysis of the gravity solid tide signal. The present invention realizes the orthogonal decomposition of the harmonic component of the gravity solid tide signal from the perspective of space by establishing a three-dimensional orthogonal decomposition model of the gravity solid tide signal, so as to realize that the frequency of the extracted harmonic component reflects spatially independent geophysical information . The advantage of this algorithm is that the DE algorithm is introduced into the traditional ICA algorithm, which effectively avoids the shortcomings of the slow convergence speed and local search of the ICA algorithm. It is an effective new method for orthogonal analysis of gravity solid 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, differential evolution) algorithm, and belongs to the field of signal processing. Background technique [0002] Under the tidal gravitational force of celestial bodies such as the sun and the moon, the earth will produce viscoelastic deformation, and the observable geophysical signal reflecting this phenomenon is the gravitational solid tidal signal. The gravitational solid tide signal reflects the periodic change of the tidal gravity of the sun, the moon and other celestial bodies. If the tidal gravitational component of each celestial body can be separated separately and the superposition relationship between the components can be revealed, the law of gravitational interaction between celestial bodies can be understood more deeply. [0003] There are abundant tidal harmonic...

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Application Information

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Patent Type & Authority Patents(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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