Multicanonical entropy like-solution of statistical temperature weighted   histogram analysis method (ST-WHAM)
  A multicanonical update relation for calculation of the microcanonical entropy $S_{micro}(E)$ by means of the estimates of the inverse statistical temperature $\beta_S$, is proposed. This inverse temperature is obtained from the recently proposed statistical temperature weighted histogram analysis method (ST-WHAM). The performance of ST-WHAM concerning the computation of $S_{micro}(E)$ from canonical measures, in a model with strong free-energy barriers, is also discussed on the basis of comparison with the multicanonical simulation estimates. 
Leandro G. Rizzi, Nelson A. Alves
cond-mat.stat-mech physics.comp-ph