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A Sparsity-Promoting Electromagnetic Inversion Method Regularized by $\ell_1 / \ell_2$-Norm of the Model Gradient
A nonlinear EM inversion method regularized by $\ell_1 / \ell_2$-norm of the model gradient is proposed. The $\ell_1 / \ell_2$-norm, defined as the ratio of $\ell_1$-norm to $\ell_2$-norm, exhibits a scale-invariant property that enables it to more accurately characterize sparsity in the solution co
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