A natural step to take is first of all to split up the function F into a positive and a negative term ; that is to say to express the rate of increase of the mass X ¡ of the component Si as the bala

一个自然的步骤是，首先将函数F分成一个正项和一个负项; 也就是说，将组分Si的质量X¡的增加速率表示为每单位时间向该组分添加的质量Ui的余额，减去每单位时间从该组分中消除的质量Vi。

原文地址: http://www.cveoy.top/t/topic/bXrO 著作权归作者所有。请勿转载和采集!