Optimization Method Xi Chen Department of Management Science and Engineering International Business School Beijing Foreign Studies University 4口48+4三4至，至)只0 Xi Chen (chenxi0109@bfsu.edu.cn) Optimization Method 1/41Optimization Method Xi Chen Department of Management Science and Engineering International Business School Beijing Foreign Studies University Xi Chen (chenxi0109@bfsu.edu.cn) Optimization Method 1 / 41