Based on traditional vehicle routing problems with time windows,this paper construct a model for distributing perishable food to minimize the total cost that includes refrigerating cost,fixation cost and transportation cost.
以带时间窗的车辆配送模型为基础,以包括制冷成本、车辆固定成本和运输成本在内的总成本最小为目标函数,建立易腐食品冷藏配送模型。
Morphological Study on the Mouthparts of Adult Saprophagous Scarab Beetles(Coleoptera:Scarabaeoidea);
腐食性金龟甲成虫口器形态学研究(鞘翅目:金龟总科)