由于定位-车辆路线问题是组合优化问题中一个典型的NP难题，大规模时难以精确求解。
It is difficult to solve in large scale because the LRP is a typical NP-hard problem in combinatorial optimization.
本文运用系统分析的思想和方法，研究了物流系统中的设施定位-配给问题和车辆路线问题的组合优化问题——定位-车辆路线问题。
Using the thought and method of system analysis, the paper researches the location-routing problem (LRP), which integrates the location-allocation problem and the vehicle routing problem.
随着物流环境的复杂化，物流区域的扩大化，设施定位问题和运输车辆路线安排问题之间的相互影响也越来越大。
With the complicated logistics environment and enlargement of logistics area, the interaction between location allocation problems and vehicle routing problems grow larger.
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