Research on Multiobjective Location of Urban Emergency Logistics under Major Emergencies
Table 1
Parameter setting.
Implication
Set
Set of emergency material supply point , = 1, 2, 3, …,
Set of emergency logistics center , = 1, 2, 3, …,
Set of material demand point , = 1, 2, 3, …,
Parameter
Weight of material demand point , namely, the proportion of the number of people in material demand point to the total number of people in all material demand points
Supply capacity of emergency material supply point
Position coordinate of emergency supply point
Position coordinate of emergency logistics center
Position coordinate of emergency demand point
Maximum distribution radius of emergency logistics centers
Distance between material supply point and emergency logistics center
Distance between emergency logistics center and material demand point
Transportation speed of materials from material supply point to emergency logistics center
Transportation speed of materials from emergency logistics center to material demand point
Transportation time of emergency materials from material supply point to emergency logistics center
Transportation time of emergency materials from emergency logistics center to material demand point
Relative size of emergency logistics center
Material demand of emergency demand point
Material demand satisfaction rate of emergency demand point
Material storage capacity of emergency logistics center
Quantity of emergency materials transported from material supply point to emergency logistics center
Quantity of emergency materials transported from emergency logistics center to material demand point
Decision variable
Whether to locate at emergency logistics center , means to establish an emergency logistics center at point , means that the emergency logistics center will not be established at point
Whether to transport the materials from material supply point to emergency logistics center
Whether to transport the materials from emergency logistics center to material demand point
