Routing Optimisation of Urban Medical Waste Recycling Network considering Differentiated Collection Strategy and Time Windows

Table 1

PSO algorithm procedure.

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Parameters:, , , , , , , , , , , , , // represents the current iteration number, represents the maximum iteration number.

Objective:

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1Define, , , , , , , , , , , , , , , , , , , , ,

2For //M is the set of particles

3For

4 Set to a random number

5End for

6For

7 Set to a random number of intervals

8End for

9 Calculate the total number of tasks and in different date

10For

11 Set to a random number of intervals or

End for

12For,

13 Set to a random number of intervals

14End for

15For

16 Set to a random number of intervals

17End for

18 Reorder based on

19 If , , , then calculate the fitness value; otherwise calculate the fitness value with penalty cost

20Update,

21End for

22Whiledo

23For

24 Update the velocity and position of , , ,

25 Make , , , feasible, and reorder based on

26Update,

27End for

28

29End while

30Return

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