机械优化设计的作业 包括一维搜索方法（二次差值，牛顿法，黄金分割法），以及最速下降法和内点惩罚函数法及等值线图-Optimal Design of mechanical operations, including one-dimensional search method (the second difference, Newton' s law, golden section method), and the steepest descent method and interior point penalty function method and the contour map