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物流系统优化中的定位—运输路线安排问题 第6页

更新时间:2012-7-17:  来源:毕业论文
5.4 时间限制
实际的物流系统中,许多情况下,客户对车辆的到达时间是有限制的。这种时间的限制又可以分为硬限制和软限制两种,硬限制要求时间的一点,软限制指定一段时间。但是,到目前为止,对LRP的研究很少考虑对时间的限制。这方面的研究将会是有益的。

5.5 多目标性
物流系统中的各个目标之间会产生冲突,如按照总费用最小目标确定的方案,在满足客户对时间要求的目标论文范文http://www.chuibin.com/  时,可能会不合要求。然而,实际物流系统均有多目标的特征。所以以后对LRP的研究中会注重多目标之间优化。

6 结论
本文对物流系统中的LRP的由来、分类、解决方法作了简要的评述,并对LRP的未来研究方向作了分析。对LRP的研究还存在许多没有很好解决的方面。对LRP的研究将会越来越向符合实际情况的方向发展。

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