Robust Synthetic Aperture Imaging of Marine Controlled-Source Electromagnetic Data

Tu, Xiaolei; Zhdanov, Michael S.

doi:10.1109/tgrs.2020.2966727

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…46 The result illustrates that the Ag-rGO-CF sample is pure and free of impurity peaks, indicating that the preparation process is reasonable and effective. On the basis of the Bragg formula, 47 the (111) interplanar spacing of Ag-rGO-CF can be determined by eq 1 (1) where d represents the interplanar spacing and n means the diffraction series. λ is the wavelength of the X-ray and θ is the angle between the incident X-ray and the corresponding crystal plane.…”

Section: Resultsmentioning

confidence: 93%

“…The exploration and development of seabed oil and gas, natural gas hydrate, and solid mineral resources by a marine electromagnetic method has far-reaching strategic significance to alleviate the pressure of the depletion of land resources . With the increasing coverage of more and more marine electromagnetic surveys, the development of high-stability marine electric-field sensor system , is of great significance for improving the detection accuracy of deep-sea electric field signals in marine electromagnetic exploration .…”

Section: Introductionmentioning

confidence: 99%

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Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Sun

et al. 2023

ACS Appl. Nano Mater.

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The increasing demand for maintenance-free, costeffective, and high-stability flexible electrodes is highly anticipated for the research of marine electric-field sensors, and various carbon fibers (CFs) are considered the most suitable carbon-based electrode for the purpose. Nevertheless, the conventional fabrication of acidified or nitrogenized CF electrodes did not attract great attention for commercial application, which has limitations in the case of simultaneous cost-effectiveness and longterm stability. In this study, with homemade reduced graphene oxide (rGO) load, the prepared double carbon substrate Ag-rGO-CF composite electrodes have a honeycomb rGO conductive skeleton and the dispersed Ag nanoparticles via a facile hermetic oxidation process and hydrothermal method. The prepared Ag-rGO-CF composite electrode demonstrated an outstanding electrode performance, including low resistance, high electrochemical reaction rate, and stable potential with long-term stability and low cost. The electric double-layer (EDL) structure theory from the Gouy−Chapman−Stern model and double carbon substrate mechanism between CFs and rGO with the help of Ag were clarified, whose principle is to strengthen the adsorption force and electrostatic attraction of the electrode and to offset the residual charge while reducing the thickness of the electric double layer to achieve the purpose of potential balance. The Ag-rGO-CF composite electrode has presented long-term stability and high sensitivity, especially a wide application bandwidth. The Ag-rGO-CF composite electrode made in this study is a competitive candidate material as a flexible marine electrode field sensor.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Sun

et al. 2023

ACS Appl. Nano Mater.

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“…However, because the interpolation function of the nodal finite element does not satisfy the condition of zero divergence, a false solution will be generated, and the accuracy of the numerical simulation will obviously be reduced when the electromagnetic vibration spectrum potential is solved first and then the electromagnetic vibration spectrum field is solved by the difference scheme. The vector finite element method can overcome the above problems [27,28]. We use unstructured tetrahedral elements to discretize the simulation area.…”

Section: Finite Element Analysismentioning

confidence: 99%

Mathematical simulation of adaptive vector finite element method for the analysis of electromagnetic vibration spectrum field response

Cheng¹,

Su²,

Hui³

et al. 2021

J. vibroeng.

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Mathematical simulation plays a vital role in the analysis of electromagnetic vibration spectrum field response. This article realizes a three-dimensional adaptive vector finite meta-acting algorithm of controlled source electromagnetic vibration spectrum (CSEM) field to address 3D meshing for the simulation of terrain fluctuations and complex electrical anomalies. The adaptive methods utilized in this article is employed for one-time field and secondary field separation in order to calculate electromagnetic vibration spectrum field response. This response can effectively solve the source singularity in finite meta-simulation and improves the numerical accuracy of electromagnetic vibration spectrum field near the field source. The two approaches analysed in this article are CSEM one-dimensional positive algorithm and finite meta-method.The adaptive mesh refinement algorithm based on post-test error estimation is used in this paper to guide the mesh refinement to reduce man-made errors caused by designing a grid. The validity of the proposed algorithm is verified through numerical simulation of one-dimensional and three-dimensional models. The outcomes obtained reveals that the finite solution of one-dimensional model coincides well with the analytical solution. The relative error of electromagnetic vibration spectrum field amplitude is about 1 %, and the overall phase difference of less than 1 degree is observed. It is analysed that the three-dimensional model finite solution also fits well with the finite volume solution and the controlled source electromagnetic vibration spectrum response with three-dimensional tilt plate abnormality is simulated. This experimental analysis shows the ability and effectiveness of the algorithm to simulate the electromagnetic vibration spectrum field of complex geoelectrical structure.

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3D large-scale transient electromagnetic modeling using a Shift-and-Invert Krylov subspace method

Zhou

et al. 2022

Journal of Applied Geophysics

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Robust Synthetic Aperture Imaging of Marine Controlled-Source Electromagnetic Data

Cited by 11 publications

References 37 publications

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Ag/Reduced Graphene Oxide/Carbon Fiber Composites as Electrodes for Highly Stable and Responsive Marine Electric Field Sensors

Mathematical simulation of adaptive vector finite element method for the analysis of electromagnetic vibration spectrum field response

3D large-scale transient electromagnetic modeling using a Shift-and-Invert Krylov subspace method

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