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

Table 8

Parameter setting of PSO.

Particle size	Largest number of; iterations ()			Initial inertia; weight ()	Inertia weight of the largest; number of iterations ()
70	600	1.5	1.5	0.85	0.3

Note: the inertia weight factors according to the following formula: .