Green Vehicle Routing and Scheduling Optimization of Ship Steel Distribution Center Based on Improved Intelligent Water Drop Algorithms

Table 2

Initialization parameters of IIWD.

Parameters	Meanings	Value
Q	Vehicle rated load	49t
	Average vehicle speed	40 km/t
	Fixed-use costs of vehicles	200/one
	Unit transportation cost per vehicle	10/km
	Number of drops	20
	Droplet velocity updating parameters	1
	Droplet velocity updating parameters	0.01
	Droplet velocity updating parameters	1
	Fuel consumption per unit distance for no-load vehicles	2
	Renewal parameters of soil and water droplets	1000
	Renewal parameters of soil and water droplets	0.01
	Renewal parameters of soil and water droplets	1
Initsoil	Initial path amount of soil	1000
Initvel	Initial droplet velocity	100
	Local soil renewal parameters	0.9
	Global soil renewal parameters	0.8
Iter	Maximum number of iterations	100
	Additional fuel consumption per unit distance for vehicles carrying goods per unit weight	0.8