第一步不考虑变量的整数约束，用修正单纯形法求解，由此可确定一部分线路是否需要建设。
The revised simplex method is used at first to calculate the optimal line extensions without integer constraints of the variables so that it can be determined which lines should be constructed.
本文给出了用代理约束选取混合整数线性规划问题初始可行解的一种方法。
In this paper, a method using surrogate constraint to select an initial feasible solution of a mixed integer linear programming problem is presented.
通过把模型中模糊机会约束清晰化，将模型转化为确定性的混合整数规划模型。
The model was transformed into a deterministic mixed integer linear planning(MILP) model by converting fuzzy chance constraints to their respective crisp equivalents.
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