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http://dx.doi.org/10.6109/jkiice.2008.12.12.2343

The Ant Algorithm Considering the Worst Path in Traveling Salesman problems  

Lee, Seung-Gwan (경희대학교 국제캠퍼스 학부대학)
Lee, Dae-Ho (경희대학교 국제캠퍼스 학부대학)
Abstract
Ant algorithm is new meta heuristic for hard combinatorial optimization problem. It is a population based approach that uses exploitation of positive feedback as well as greedy search. It was first proposed for tackling the well known Traveling Salesman Problem. In this paper, we propose the improved $AS_{rank}$ algorithms. The original $AS_{rank}$ algorithm accomplishes a pheromone updating about only the paths which will be composed of the optimal path is higher, but, the paths which will be composed the optimal path is lower does not considered. In this paper, The proposed method evaporate the pheromone of the paths which will be composed of the optimal path is lowest(worst tour path), it is reducing the probability of the edges selection during next search cycle. Simulation results of proposed method show lower average search time and average iteration than original ACS.
Keywords
Ant System; Optimization; Heuristic; $AS_{elite}$; $AS_{rank}$;
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