Dealing with Pure New User Cold-Start Problem in Recommendation System Based on Linked Open Data and Social Network Features

Algorithm 2

Rating prediction.

	Input: Overall Item Similarity Matrix OISM (I, I), User-Item Rating Matrix, UIM (U, I), User Set U, Item Set I
	Output: Dense User-Item Rating Matrix, DUIM (U, I)
	for each user u ɛ U
	for each (item not rated by u) & epsiv; I
	if (rating given for similar item set)
	Su,i =
	else
	Su,i =
	end if
	end for
	end for