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QoS multicast routing problem is a nonlinear combination optimization problem, which has been proved to be a NP complete problem. a hybrid algorithm with ant colony optimization algorithm(ACO) and particle a warm optimization algorithm(PSO) is presented. The ACO-GA algorithm absorbs the merits of ACO and GA respectively. In hybrid algorithm, the position update of PSO is used to regulate the solution...
We describe a kind of supply chain optimization problem as a commodity stream routing problem upon a stochastic flow network. We divide the optimization problem to two parts: Firstly, establish model to calculate the optimal commodity stream allocation policy on all minimal paths; secondly, convert these allocation policy on all minimal paths to the optimal routing policy on all arcs. A multi-objective...
The medicine data are Boolean ones in many situations, and the scale development based on them has not been solved soundly, especially the items weight problem. The methods combining GA and k-NN algorithm is often introduced to cope with the problem. But the present improved k-NN algorithm do not adapt to the weight determination of scale's items. A new improve methods named the LO-DFWS-based k-NN...
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