An Optimal Hierarchical Decision Model for a Regional Logistics Network with Environmental Impact Consideration

Table 4

The operator parameters on logistics node.

	Potential logistics park				General node
Logistics node	3	4	5	7	𝑁𝑖 (𝑖=1,2,6,8)
Economy of scale factor ρ	0.9	0.9	0.9	0.9	1.0
Capacity (tons/week)	1200	1000	1000	800	150
Fixed construction cost per unit area of logistics node ($/m^2)	0.533	0.533	0.533	0.533	0.533
Variable cost per unit of shipment ($/ton)	0.22	0.18	0.2	0.2	0.35