To evaluate the quality of optimal solutions obtained by the ant colony optimization(ACO)algorithm in limited time
an improved ACO algorithm is presented on the basis of the ordinal optimization. An initial solution is selected using the blind picking rule
and the pheromone is initialized correspondingly. The number of iterations to achieve the optimal solution meeting the demand is then determined and is used as the termination condition of the algorithm. To make better use of the solutions obtained at each iteration
the first l solutions are employed to enhance search capability at the beginning phase of the algorithm. While the current optimal solution is used at the end phase of the algorithm to accelerate the convergence. The time complexity of the novel algorithm is not increased under the condition that ensures the convergence. Simulation results on the traveling salesman problem show that the proposed algorithm is superior to the max-min ant system in both the quality of solutions and the speed of convergence.
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references
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