对原PSO工具箱进行了该进，主要是修正了神经网络训练部分的几个漏洞。-modified some lines in the toolbox, especially in the part of training neural net. some bug fixed.

主要是应用pso工具箱来优化函数griewank，实现粒子群对函数的测试-Mainly applications pso toolbox to optimize function griewank, and particle swarm function test