Particle swarm optimization (PSO) is an evolutionary algorithm that is well known for its simplicity and effectiveness. It usually has strong global search capability but has the drawback of being easily trapped by local optima. A scaling mutation strategy and an elitist learning strategy are presented in this paper. https://www.roneverhart.com/Medline-Remedy-Phytoplex-Z-Guard-Skin-Protectant-Paste-Scented/