A.R. Carvalho, H.F. de Campos Velho, S. Stephany, R.P. Souto, J.C. Becceneri, S. Sandri (2007): Fuzzy Ant Colony Optimization for Estiamting Chorophyll Concentration Profile in OffShore Sea Water, Inverse Problems, Desing and Optimization Symposium IPDO-2007, April 16-18, Miami (FL), USA.

Abstract: The determination of some inherent optical properties can be addressed by estimating the ocean Chlorophyll concentration, if bio-optical models can be applied – such as for the offshore sea water. This inverse problem can be formulated as an optimization problem and iteratively solved, where the radiative transfer equation is the direct model. An objective function is given by the square difference between computed and experimental radiances at every iteration. In the standard ACO, the pheromone is reinforced only on the best ant of the population. The fuzzy strategy consists to put additional pheromone quantity on the best ant, but a small pheromone quantity is also spread on the other solutions close to the best one. Test results show that the fuzzy-ACO produces better inverse solutions.