A Novel Preferential Diffusion Recommendation Algorithm Based on User’s Nearest Neighbors

Table 1

Basic properties of the three data sets and the sparsity is defined as .

Network				Sparsity
MovieLens 100k	100000	943	1682	0.063
MovieLens 1M	1000209	6040	3952	0.042
Epinions	154122	4066	7649	0.005