MEA-CNDP: A Membrane Evolutionary Algorithm for Solving Biobjective Critical Node Detection Problem

Algorithm 4

Initialize_Population. Generate the initial membrane population.

	Input: N (population size), D (the number of decision variables), Cost (weights related to deleting nodes), Score (the scores of decision variables), (upper bound vectors)
	Output: P (the initial membrane population)
(1)	P ← ;
(2)	for i = 1 to N do
(3)	Generate an empty membrane m;
(4)	for j = 1 to rand()  D do
(5)	[x1, x2] ← Randomly select two decision variables from environment;
(6)	ifthen
(7)	Duplicate x1 and add it to membrane m;
(8)	else
(9)	Duplicate x2 and add it to membrane m;
(10)	m ← m  ;
(11)	P ← P  m;
(12)	return P;