A Maximum Entropy Method with a Priori Maximum Likelihood Constraints
Abstract
Implementations of the maximum entropy method for data reconstruction have almost universally used the approach of maximizing the statistic S  λχ^{2}, where S is the Shannon entropy of the reconstructed distribution and χ^{2} is the usual statistical measure associated with agreement between certain properties of the reconstructed distribution and the data. We develop here an alternative approach which maximizes the entropy subject to the set of constraints that χ^{2} be at a minimum with respect to the reconstructed distribution. This in turn modifies the fitting statistic to be S  λ &b.dot; &b.nabla;χ^{2} where λ is now a vector. This new method provides a unique solution to both the wellposed and illposed problem, provides a natural convergence criterion which has previously been lacking in other implementations of maximum entropy, and provides the most conservative (least informative) data reconstruction result consistent with both maximum entropy and maximum likelihood methods, thereby mitigating against overinterpretation of reconstruction results. A spectroscopic example is shown as a demonstration.
 Publication:

The Astrophysical Journal
 Pub Date:
 March 1997
 DOI:
 10.1086/303837
 Bibcode:
 1997ApJ...478..658L
 Keywords:

 Methods: Numerical;
 Methods: Statistical