Alternating cycles contribution: a strategy of tour-merging for the traveling salesman problem
Hisao Tamaki · MPG.PuRe (Max Planck Society) · 2003
A strategy of merging several traveling salesman tours into a better tour, called ACC (Alternating Cycles Contribution) is introduced. Two algorithms embodying this strategy for geometric instances is implemented and used to enhance Helsgaun's implementaton of his variant of the Lin-Kernighan heuristic. Experiments on the large instances in TSPLIB show that a significant improvement of performance is obtained. These algorithms were used in September 2002 to find a new best tour for the largest instance pla85900 in TSPLIB.