This paper makes improvement on the criterion of choosing basic variable in simplex algorithm and gives out a new selecting criterion.

本文就单纯形算法选取入基变量的准则进行改进，给出一种新的选取入基变量的准则。

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The simplex pivotal calculations based on the new criterion can reduce the iterations to the least. The new algorithm can save much CPU time, especially for the large-scale linear programming problem.

按该准则进行的枢轴运算，能使单纯形算法的迭代次数减到最少，尤其对大规划线性规划问题而言，该方法能节省相当可观的CPU计算时间。

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