back substitution meaning in English

倒转代换
回代
逆计算

The procedure for solving the eqs is called back substitution .
解方程组的这一步骤叫回代。
Content : on the problem of multi - groups discrimination , the correct rates of back substitution of existing discriminate methods may be good for some data , yet it is not the case for another data . furthermore we ca n ' t evaluate the results of the discriminations
<中文摘要> =在多个总体的判别问题中，已有的判别方法的判别回代率不太“稳定” ，即对有些数据判别结果可能会好些，而对另外一些数据则不然。
Its essential idea is : 、 from g1 , g2 , … , gk choose a group g 1 ， it can be satisfied that g 1 can distinguish each sample to a greatest extend , i . e . , using the existing discriminate methods ( choosing index and not - choosing index ) to judge each sample whether in g 1 or not in g 1 so as to maximize the correct rates of back substitution
其基本思想是：、从g1 , g2 , … , gk中寻找一个总体设为g 1 ，使得g 1能最大程度的区分各个样品，即应用已有的判别方法（挑选因子的和不挑选因子的）使得判断各样品要么属于g 1 ，要么不属于g 1的正确率达到最大。