The Very Fast Simulated Annealing acceptation function.
Level = accept_func_vfsa(F_current, F_neigh, T)
:F_current the current function value : :F_neigh the function value of the neighbour : :T the current temperature : :Level the level of acceptation, in the interval [0,1]. :
The accept_func_vfsa provides the Very Fast Simulated Annealing acceptation function.
If the level computed by the acceptation function is higher than the generated uniform random number in the interval [0,1], then the neighbour is accepted.
The formula used in the implementation is the following.
Level = 1 / (1 + `exp`_(-(F_current - F_neigh)/`max`_(T,%eps)));