在普通粒子群优化的基础上引入环境概念，在粒子进行速度及位置的更新之前，先进行粒子与周围环境的比较，选取较优的粒子，从而提高精度-In normal particle swarm optimization is introduced on the basis of environmental concept, particle velocity and position in the update before, first compare particles and the surroundin