Community Detection Based on Density Peak Clustering Model and Multiple Attribute Decision-Making Strategy TOPSIS

Algorithm 3

Community_expansion .

	Input: , the network; , the keynodes of communities.
	Output: , the partition of network.
(1)	;
(2)	for in do
(3)	if and then
(4)	.add ;
(5)	else
(6)	.add ;
(7)	end
(8)	end
(9)	arrange community frameworks in in the descending order of product of density and distance of nodes in the framework;
(10)	for in do
(11)	’s first- and second-order neighbors;
(12)	= calculate the four similarities between and ;
(13)	while True do
(14)	-similarity = TOPSIS ;
(15)	node with max -similarity;
(16)	c.add ;
(17)	ifthen
(18)	add ’s first- and second-order neighbors to ;
(19)	update ;
(20)	else
(21)	.remove ;
(22)	break;
(23)	end
(24)	end
(25)	end
(26)	return