An Efficient Recommendation Algorithm Based on Heterogeneous Information Network

Table 1

Related notations and explanations.

Symbols	Explanation
G	Heterogeneous information network
V	Node set
	Edge set
A	Collection of categories for nodes
R	Collection of categories for relationships
U	User set
I	Project set
	Estimated user rating of the project
	Vector representation of node
	Neighbors of node u
	Final vector representation of user u and item i
d	Dimensions of heterogeneous information network representation
D	Dimension of hidden variables
	Hidden variables for user u and item i
	Parameters for combining heterogeneous information networks and matrix factorization