Critical Nodes Identification of Scientific Achievement Commercialization Network under k-Core

Algorithm 2

Multilayer network coupling in over two layers.

	Input: first layer adjacency matrix A^1, second adjacency matrix A^2, ..., the last layer adjacency matrix A^n, relationship between two layers B^1, B^2,...,B^n − 1.
	Output: coupling adjacency matrix D
(1)	in A^1
(2)	in A^2
	...
(3)	in A^2
(4)	in B^1
	...
	in B^n − 1
(5)	in D^1
(6)	if
(7)
(8)	else
(9)
(10)	end
(11)	for i = 2 : n − 1
(12)	if
(13)
(14)	else
(15)
(16)	end
(17)	D;