Probabilistic inverse problems using machine learning - applied to inversion of airborne EM data.

This is a Preprint and has not been peer reviewed. This is version 1 of this Preprint.

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Authors

Thomas Mejer Hansen

Abstract

Probabilistic inversion methods allow, in principle, to combine probabilistic geo-information from diverse sources into one consistent statistical model (the posterior distribution) containing all available information. In practice, however, they rely on Monte Carlo sampling methods, which can be extremely computationally demanding.
Here a general, and simple to apply, method is presented, utilizing machine learning, which allows fast direct estimation of properties of the posterior distribution.
The fundamental idea is to construct a training data set that represents all the information represented in the probabilistic formulation of inverse problems. From such a training data set, it is demonstrated how regression and classification type neural networks can be designed, with specific choices of output layer and loss functions, that allows direct characterization of the posterior distribution using regression and classification type
The methodology is demonstrated on probabilistic inversion of airborne electromagnetic data and compared to results obtained computationally more expensive sampling methods.

DOI

https://doi.org/10.31223/X5JS56

Subjects

Earth Sciences, Physical Sciences and Mathematics

Keywords

Proabilistic Methods, Inversion theory

Dates

Published: 2021-03-03 02:02

License

CC BY Attribution 4.0 International

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