中文说明：目前最先进的标准粒子群算法，是美国人写的，不管是迭代速度还是迭代精度都达到了先进水平，目前正在研究粒子群算法的同学可以看一看，亲测效果不错。本人在原来的基础上进行了代码的优化和改进，加入了适应度函数的变化曲线，并提供了多种测试函数，直接用matlab打开就可以运行。
English Description：
At present, the most advanced standard particle swarm optimization algorithm is written by the Americans. Both the iteration speed and the iteration accuracy have reached the advanced level. Students who are studying particle swarm optimization algorithm can have a look, and the pro test effect is good. I optimize and improve the code on the basis of the original, add the change curve of fitness function, and provide a variety of test functions, which can be run directly with MATLAB.