This paper analyzes the theory and the method in solving the network problem by the mathematics model of linear programming and graph theory.

分析了用线性规划、图论的方法解决网络问题的理论和算法。

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This paper introduces a method, that set up a model of linear programming in networks time cost analysis, and illustrates the application of the method through a example.

介绍了用单纯形法求解网络最优工期成本方案的步骤和方法，重点介绍了数学模型的建立原理和步骤。

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Based on the determination of optimizing parameters and boundary equations, the cropland using structure in Fujian Province was optimized by the model of linear programming.

在确定优化参数和约束方程的基础上，借助线性规划模型进行福建省耕地利用结构优化。

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