In order to improve the fine structure inversion ability of igneous rocks for the exploration of underlying strata. based on particle swarm optimization (PSO). we have developed a method for seismic wave impedance inversion. Through numerical simulation. https://www.kaliboat.com/product-category/food-servicecommercial-kitchen-equipmentfood-preparation-equipmentcommercial-meat-processing-equipmentsausage-stuffing-machines/