Seismic anomaly extraction method based on tensor decomposition of satellite magnetic field data fusion

A magnetic field data and tensor decomposition technology, which is applied in the fields of instrument, calculation, character and pattern recognition, etc. It can solve the problems of insufficient combination of multi-channel measurement data and low reliability of results, and achieve abnormally reliable fusion of earthquakes and improved reliability. Effect

Active Publication Date: 2022-06-03
JILIN UNIV
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Problems solved by technology

[0007] The above techniques only use single-component satellite magnetic field data for research, or study the single-component data separately and then simply combine the results, or are limited to using a certain component magnetic field data of parallel flying binary satellites to extract seismic anomalies, and do not fully combine multi-channel Information from measurement data, the results are less reliable

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  • Seismic anomaly extraction method based on tensor decomposition of satellite magnetic field data fusion
  • Seismic anomaly extraction method based on tensor decomposition of satellite magnetic field data fusion
  • Seismic anomaly extraction method based on tensor decomposition of satellite magnetic field data fusion

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Embodiment Construction

[0063]

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[0068]

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[0070] a, b ∈ R

[0071] B

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[0075]

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[0080]

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[0084] Among them, represents the (i, j, k)th element of the third-order tensor, which is the sum of the R rank tensors, and represents the

[0086] U

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[0088]

[0089] n=1, 2, 3. N=3.

[0092] Input: the number of tensor decomposition features R, the maximum number of iterations N

[0093] Output: matrix U

[0100]

[0102]

[0103] where p(x) represents the probability density distribution of the random variable X.

[0105] Calculate the ratio of the maximum value in the region of the fusion local feature component Hs of all the research tracks to the root mean square of the entire track,

[0106] For the 7.8 magnitude Ecuador earthquake that occurred on April 16, 2016, the X component of the Swarm satellite group Alpha star,

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[0118] a, b ∈ R

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[0123]

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[0133] Wherein, represents the (i, j, k)...

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Abstract

The present invention is a satellite magnetic field data fusion seismic anomaly extraction method based on tensor decomposition, comprising: subtracting CHAOS-7 magnetic field model data from multi-channel satellite magnetic field data to remove the earth's main magnetic field and static lithospheric magnetic field; using wavelet decomposition to remove low frequencies of the remaining data components; construct the corresponding third-order time-spectrum tensor according to the time-frequency amplitude matrix of each channel magnetic field data obtained by synchrosqueezing wavelet transform; use non-negative tensor decomposition to decompose the constructed third-order time-spectrum tensor, and decompose The fused local feature component related to earthquakes; the fused local feature component is selected according to the energy-entropy ratio, and the fused seismic anomaly in this component is extracted by the threshold segmentation method, and the fused seismic anomaly result is output. The invention combines the information of the multi-channel satellite magnetic field data to obtain the fused local feature components related to the earthquake, and the extracted fused seismic anomaly is more reliable.

Description

Seismic anomaly extraction method based on satellite magnetic field data fusion based on tensor decomposition technical field The present invention relates to the field of satellite magnetic field seismic anomaly extraction, specifically satellite magnetic field based on tensor decomposition Data fusion seismic anomaly extraction method. Background technique [0002] Earthquakes are the most active phenomena in the lithosphere and on Earth. During long-term earthquake preparation and during seismic energy At the time of release, some earthquake-related anomalies may occur in the lithosphere, atmosphere and ionosphere, including deformation anomalies, Abnormal temperature, abnormal gas concentration, abnormal electromagnetic, etc. Pairs of physical quantities that may appear abnormal through ground stations and satellite payloads Seismic events can be studied by taking measurements and analyzing the physical quantities obtained before and after the earthquake. where ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06F2218/08G06F18/253
Inventor 朱凯光樊蒙璇温佳咪贺小丹王婷张逸群
Owner JILIN UNIV
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