Considering the problems that particle swarm optimization(PSO)algorithm and its variants are easily to fall into local optimal solutions and convergence in the optimization process of complex constrained multi-objective problem
a novel PSO based on dynamic learning strategy and mutation factor(DSPSO)is proposed. First
through analyzing the learning mechanism of particle swarm
DSPSO introduces the dynamic learning strategy
enabling particles to adaptively adjust the weights of cognitive component and social component in the iteration renewal process and guide themselves to explore in the optimal direction
hence effectively accelerating the convergence rate. Second
by introducing the ladder mutation factor
when the particles are trapped in a local optimum
they are enabled to break the limit of update-step size to make tentative jumps in the two-dimensional spatial neighborhood of the velocity vector direction. When a better solution is found
the optimal solution would be updated. Finally
experiments are conducted on the typical functions of BenchMark
and the results show that the accuracy and convergence rate of DSPSO are better than the contrast algorithms. In the multi-objective vehicle routing problem optimization
the acceptable and success rates of the DSPSO solutions are 0.91 and 0.66
respectively
far outperform the results of 0.16 and 0.11 by comparison algorithm
reflecting the superiority of DSPSO in the multi-objective vehicle routing problem.
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references
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