EGO算法是基于kriging模型的全局优化方法，不通过函数而是通过样本模型寻优，文件给出实例，加载相应的工具箱即可。(EGO algorithm is a global optimization method based on Kriging model. Instead of function, it is optimized by sample model. The example is given in file, and the corresponding toolbox can be loaded.)