“…The default parameter values for each variant are chosen reasonably close to the values proposed in the ACO literature for the TSP Bullnheimer et al, 1999;Cordón et al, 2002): in all the variants m, α, and β are set to 10, 1.0, and 2.0, respectively; in ACS-EE, ρ and q 0 are set to 0.1 and 0.98, respectively; in MMAS-EE, ρ is set to 0.2; in RAS-EE, ρ and w are set to 0.5 and 6, respectively; in BWAS-EE, ρ is set to 0.…”