Research Article

A Nonlinear Integer Programming Model for Integrated Location, Inventory, and Routing Decisions in a Closed-Loop Supply Chain

Table 4

AHSAGA parameters.

ParameterDescriptionSensitivity analysisExperimental setting
RangeMedian

Number of iterations{200, 400, 600, 800, 1000}600600
Population size{20, 40, 60, 80, 100}6060
Initial crossover probability{0.5, 0.6, 0.7, 0.8, 0.9}0.70.8
Initial mutation probability{0.05, 0.1, 0.15, 0.2, 0.25}0.150.25
Adaptive coefficient{0.08, 0.09, 0.1, 0.11, 0.12}0.10.09
Adaptive coefficient{0.1, 0.125, 0.15, 0.175, 0.2}0.150.175
Adaptive coefficient{1, 2, 3, 4, 5}33
Adaptive coefficient{1, 2, 3, 4, 5}32
Initial temperature{50, 100, 150, 200, 250}150200
Cooling rate{0.95, 0.96, 0.97, 0.98, 0.99}0.970.98