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

Algorithm 1

Multilayer network coupling in two layers.

	Input: upper layer adjacency matrix A^1, sublayer adjacency matrix A^2, relationship between upper layer and sublayer B^1
	Output: coupling adjacency matrix D
(1)	in A^1
(2)	in A^2
(3)	in B^1
(4)	dij in D
(5)	if
(6)
(7)	else
(8)
(9)	end
(10)	D;