Dynamic Sign Guidance Optimization for Crowd Evacuation considering Flow Equilibrium

Algorithm 4 Reproduction algorithm in Genetic algorithm.

(1)	Input: , ,
(2)	Output: the next-generation population
(3)	Procedure REPRODUCTION(, , , , )
(4)	Set , make sure no identical chromosomes are in .
(5)	For each chromosome in , do
(6)	Calculate the fitness value of the chromosome obtain the chromosome with maximum fitness value from
(7)	End for
(8)	Let ， .
(9)	while , do
(10)	Randomly select chromosome and from
(11)	If
(12)	Then set
(13)	Else set
(14)	End if
(15)	Let ， .
(16)	End while
(17)	Return
(18)	End procedure