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

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

2000-08-17

arxiv.org/abs/math-ph/0008026v1

Physics

Mathematical Physics

Presented at the 19th Int. worskhop on Bayesian and Maximum Entropy methods (MaxEnt 1999), Aug. 2-6, 1999, Boise, Idaho, USA

Scientific paper

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, caracterisation of the proposed solution. Many works have been done for the three last steps. The two first 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 primordial. In this paper, we first propose a complete solution whithin a Bayesian framework. Then, we apply the proposed method to an inverse elastic electron scattering problem.

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