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• W2906386705 abstract "Geophysical inversion attempts to estimate the distribution of physical properties in the Earth's interior from observations collected at or above the surface. Inverse problems are commonly posed as least-squares optimization problems in high-dimensional parameter spaces. Existing approaches are largely based on deterministic gradient-based methods, which are limited by nonlinearity and nonuniqueness of the inverse problem. Probabilistic inversion methods, despite their great potential in uncertainty quantification, still remain a formidable computational task. In this paper, I explore the potential of deep learning methods for electromagnetic inversion. This approach does not require calculation of the gradient and provides results instantaneously. Deep neural networks based on fully convolutional architecture are trained on large synthetic datasets obtained by full 3-D simulations. The performance of the method is demonstrated on models of strong practical relevance representing an onshore controlled source electromagnetic CO2 monitoring scenario. The pre-trained networks can reliably estimate the position and lateral dimensions of the anomalies, as well as their resistivity properties. Several fully convolutional network architectures are compared in terms of their accuracy, generalization, and cost of training. Examples with different survey geometry and noise levels confirm the feasibility of the deep learning inversion, opening the possibility to estimate the subsurface resistivity distribution in real time." @default.
• W2906386705 created "2019-01-01" @default.
• W2906386705 creator A5086334229 @default.
• W2906386705 date "2019-05-02" @default.
• W2906386705 modified "2023-10-14" @default.
• W2906386705 title "Deep learning electromagnetic inversion with convolutional neural networks" @default.
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• W2906386705 doi "https://doi.org/10.1093/gji/ggz204" @default.
• W2906386705 hasPublicationYear "2019" @default.
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