Calculate the values of the objective function at the corner points, then compare all of them to find out the maximum or minimum value of the objective function.
Calculate the values of the objective function at the corner points, then compare all of them to find out the maximum or minimum value of the objective function.
计算目标函数在偶角点处的值，然后进行长较，求出目标函数的最大值或最小值。