Dynamic Sign Guidance Optimization for Crowd Evacuation considering Flow Equilibrium

Algorithm 3 Mutation algorithm in genetic algorithm.

(1)	Input: , , ,
(2)	Output: the offspring population
(3)	Procedure MUTATION(, , , )
(4)	Set temporary population chromosome set
(5)	For to , do
(6)	generate random number
(7)	If
(8)	Then add the th chromosome in to
(9)	End if
(10)	End for
(11)	For the th chromosome in ( to ), do
(12)	generate random positive integer
(13)	Selection of gene pair in to mutate to . Let and if , otherwise, .
(14)	the new chromosomes are obtained and added to the offspring population .
(15)	End for
(16)	Return
(17)	End procedure