An Effective Recommender Algorithm for Cold-Start Problem in Academic Social Networks

Table 4

The possible conditions of item recommendation to a user.

	Selected	Not selected	Total
Relevant	𝑁rs	𝑁rn	𝑁r
Irrelevant	𝑁is	𝑁in	𝑁i
Total	𝑁s	𝑁n	𝑁