A Novel Precise Personalized Learning Recommendation Model Regularized with Trust and Influence

Table 1

Symbol definition.

Symbol	Definition
U, I	refer to the learners’ clusters and refer to the test clusters
R	Test score
Iu	Test cluster learner u has already rated i
Ui	Learners’ cluster who has already scored in test
P, Q, Y, W	Refer to learners’ eigen matrix, test eigen matrix, implicit eigen matrix, and trust eigen matrix
Bu, Bi	Indicate learner’s bias vector and test’s bias vector
T	Trust matrix
Ti	All trust clusters of learner i, including truster cluster and trustee cluster
G = (V, E)	Social network
<i, J>	An edge from node i pointing to node j
IU	Cluster of influential learners