A genetic algorithm for the generalised assignment problem
Computers and Operations Research
The ant colony optimization meta-heuristic
New ideas in optimization
HAS-SOP: Hybrid Ant System for the Sequential Ordering Problem
HAS-SOP: Hybrid Ant System for the Sequential Ordering Problem
Ant colony system: a cooperative learning approach to the traveling salesman problem
IEEE Transactions on Evolutionary Computation
Enhancements to extremal optimisation for generalised assignment
ACAL'07 Proceedings of the 3rd Australian conference on Progress in artificial life
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The usual assumptions of the ant colony meta-heuristic are that each ant constructs its own complete solution and that it will then operate relatively independently of the rest of the colony (with only loose communications via the pheromone structure). However, a more aggressive approach is to allow some measure of competition amongst the ants. Two ways in which this can be done are to allow ants to take components from other ants or limit the number of ants that can make a particular component assignment. Both methods involve a number of competitions so that the probabilistic best assignment of component to ant can be made. Both forms of competitive ant colony optimisation outperform a standard implementation on the benchmark set of the assignment type problem, generalised assignment.