The raw material logistics of the agricultural product deeply processing enterprises both in the field of academic research and in the actual operation, is of Paramount importance.
农产品深加工企业原材料物流无论是在学术研究领域还是在企业的实际操作中，都具有极其重要的意义。
But there is few academic researches for these enterprises especially the planning of the time definite logistics transportation network.
但针对于这类物流企业需要的时效物流运输网路规划的研究较少。
Currently, most of the academic location models regard the Minimum logistics cost as the goal, with little regarding of time efficiency.
目前，学术界提出的大部分选址模型都是以物流成本最小为目标，很少考虑时间效率问题。
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