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In this paper, an improved multimodal optimization (MMO) algorithm,calledLSEPSO,has been proposed. LSEPSO combined Electrostatic Particle SwarmOptimization (EPSO) algorithm and a local search method and then made somemodification on them. It has been shown to improve global and local optimafinding ability of the algorithm. This algorithm useda modified local search toimprove particle's personal best, which used n-nearest-neighbour instead ofnearest-neighbour. Then, by creating n new points among each particle and nnearest particles, it tried to find a point which could be the alternative ofparticle's personal best. This method prevented particle's attenuation andfollowing a specific particle by its neighbours. The performed tests on anumber of benchmark functions clearly demonstrated that the improved algorithmis able to solve MMO problems and outperform other tested algorithms in thisarticle.

An improved multimodal PSO method based on electrostatic interaction using n- nearest-neighbor local search