The Optimization Model of Earthquake Emergency Supplies Collecting with the Limited Period and Double-Level Multihub

Table 2

Average collecting time of emergency supplies under the hub network.

	0.3	0.7	2.1	1.2	0.5	1.1	1.5	2
	0.5	0.4	0.8	0.6	1	0.9	1.3	1.4
	1	1.5	1.8	2.2	2	1.3	0.5	0.9
					—	—	—	—
	0.8	0.6	1.5	0.9	—	—	—	—
	1	0.7	2	1.3	—	—	—	—
	2	0.8	1.5	1.4	—	—	—	—

Note: set the average transit time as 1 for each emergency supplies distribution center during cycle .