中文说明：用matlab实现鲍威尔法（powell）求多维无约束函数极值点，修改目标函数和迭代精度就可以使用，根据机械工业出版社出版的哈尔滨工业大学的孙靖民主编《机械优化设计》上的框图编写而成，验证过可运行得到正确结果
English Description：
Using MATLAB to solve the extremum point of multi-dimensional unconstrained function, modifying the objective function and iteration precision can be used. According to the block diagram of mechanical optimization design edited by sun Jingmin of Harbin Institute of technology published by China Machine Press, the correct results can be obtained after verification