Collaborative Vehicle Routing Problem in the Urban Ring Logistics Network under the COVID-19 Epidemic

Algorithm 1

Framework of VNS.

	Framework of VNS:
	Input: neighbor area ,  = 1, 2, … ,
	Initialization: initial solution is given
	while termination condition is not met do:
	while ≤ do:
	And is any neighbor of , ; \\Shaking
	Local search of , get ; \\Local search
	If fitness of is better than then: \\Acceptance criteria
	;
	;
	else:
	\\Neighborhood change
	return