利用图论知识建立了钢管订购和运输的二部图模型，提出了去边法与方案的优化调整方法，得到了问题的最优解。
After the diagram model of order and transportation model of the steel pipe is built, change-edge and optimizing methods were introduced and an optimal solution was achieved.
实验结果表明，基于遗传算法的求解方案能快速地求出传感器节点位置优化问题的全局最优解，并满足目标定位的精度要求。
Experiment results show that the global optimal solution can be quickly obtained by the proposed method and the precision requirement for target location is satisfied.
该方法以优化理论为依据，以待评方案距理想最优方案的加权距离的平方为优化目标，建立了新的数学模型，并给出了精确解。
Using optimization theory a mathematics model which optimizes the distance square of project being evaluated and ideal optimization scheme is established.
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