说明：  数值分析法能够计算出使得物流成本最少的物流中心的选址地点，这使得物流公司能够赚取更多的利润。在用数值分析法计算时，迭代的步骤比较复杂，如果手工作业的话费时费力比较多
(Numerical analysis method to calculate the minimum cost of logistics Logistics Center location, which makes logistics company to earn more profits. In numerical analysis method, the iteration step is more complex, if the bill is laborious manual work more)