Model selection for inverse problems: Best choice of basis functions and model order selection

Details Model selection for inverse problems: Best choice of basis functions and model order selection Model selection for inverse problems: Best choice of basis functions and model order selection

2001-11-06

arxiv.org/abs/physics/0111020v1

Physics

Data Analysis, Statistics and Probability

Presented at MaxEnt00. Appeared in Bayesian Inference and Maximum Entropy Methods, Ali Mohammad-Djafari(Ed.), AIP Proceedings

Scientific paper

10.1063/1.1381850

A complete solution for an inverse problem needs five main steps: choice of basis functions for discretization, determination of the order of the model, estimation of the hyperparameters, estimation of the solution, and finally, characterization of the proposed solution. Many works have been done for the three last steps. The first two have been neglected for a while, in part due to the complexity of the problem. However, in many inverse problems, particularly when the number of data is very low, a good choice of the basis functions and a good selection of the order become primary. In this paper, we first propose a complete solution within a Bayesian framework. Then, we apply the proposed method to an inverse elastic electron scattering problem.

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