外点 meaning in English

exterior point
outer point

By means of the optimization method - punishing function method and taking the sum of the planet gear radius and center distance as the target function , the parameters of drive are optimized . by using the optimization program , the initial serial studies of drive are completed , the best serial parameter value of the drive is given
采用外点罚函数优化方法，通过取行星轮半径和中心距之和作为优化目标函数，对滚锥齿超环面行星蜗杆传动进行了参数优化，运用此优化程序，初步完成了对该种传动的系列化研究，给出了传动系列的最佳参数取值。