Research Article

Transportation Risk Control of Waste Disposal in the Healthcare System with Two-Echelon Waste Collection Network

Algorithm 1

PSO algorithm procedure.
Parameters,,,,, // represents the current iteration number, and represents the maximum iteration number.
(1)Define , , , , , , and
(2)For //M is the set of particles
(3) Set , , and to a random number
(4) Reorder based on
(5) If , , , then calculate the fitness value; otherwise calculate the fitness value with penalty cost
(6)Update,
(7)End for
(8)While ( ) do
(9)For
(10)  Update the velocity and position of , , and
(11)  Reorder based on
(12)  If , , , then calculate the fitness value; otherwise calculate the fitness value with penalty cost
(13)  Update,
(14)End for
(15)
(16)End while
(17)Return