The default Simulated Annealing acceptation function.
Level = accept_func_default(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_default provides the default 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 = `exp`_(-(F_neigh - F_current)/`max`_(T,%eps));