Optimization of VRR for Cold Chain with Minimum Loss Based on Actual Traffic Conditions

Table 1

Parameter setting.

Parameter of the symbol	Meaning	Value	Parameter of the symbol	Meaning	Value
	The total vehicles	4		Unit price of goods	5
	The total customer points	20		Number of ants	50
	Full load of one vehicle	2000		Number of iterations	60
	Penalty coefficients earlier than TW	2.0	Alpha	The pheromone important factor	1
	Penalty coefficients later than TW	3.0	Beta	Heuristic function important factor	3
	Unit fuel cost of no load	2.5	Rho	The pheromone factor	0.85
	Unit fuel cost of full load	3.0		Positive constant	0.75
	Unit refrigeration cost in transit	2.0
	Unit refrigeration cost in unloading	2.5
	Coefficient of damage in transit	0.01
	Coefficient of damage in unloading	0.015