取基为B的单纯形表中,决策变量χj的检验数如何表示,它的符号、绝对值的作用是什么?
Cj—Zj=Cj=一CBP'j=Cj—CbBPj。若符号为正,则Xj增加时目标系数S也增加,若符号为负,则Xi增加S减小;绝对值大者S变化大,反映了S变化的绝对速度。
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