为了加强全局搜索能力和收敛到全局最优解，给出了同步变化和异步变化学习因子改进的粒子群算法.通过对同一个多元复杂函数求最小值对比分析两种方法。-In order to strengthen the global search ability and convergence to the global optimal solution, given changes in synchronous and asynchronous learning factor changes improved par