To regularize the ill-posed problem,
the maximum-entropy principle was used. In this paper, as a generalization, the Shannon–Jaynes
entropy functional and the MAXENT or minimum relative entropy principle [16–18] is invoked to
obtain the basis functions. Sivia [44] presents an excellent introduction to Bayesian inference and
maximum-entropy methods, whereas Jaynes [50] provides a more rigorous and in-depth look at
probability theory from the Bayesian perspective.