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

Table 2

The experimental statistics in the context of cold start.

Algorithms	Data gathering series number	Cold-start parameters
		New items	New users	Existing users	totNRI_EU	totNRI_NU	avgNRI_EU	avgNRI_NU
Collaborative	CF_Series1	100	8	864	0	0	0	0
	CF_Series2	99	5	869	0	0	0	0
	CF_Series3	98	6	875	0	0	0	0
Content-based	CB_Series1	99	7	882	3112	0	3.528	0
	CB_Series2	101	9	891	3156	0	3.542	0
	CB_Series3	100	8	899	3190	0	3.548	0
ECSN	ECSN_Series1	99	7	906	3720	27	4.106	3.857
	ECSN_Series2	100	5	911	3769	18	4.137	3.6
	ECSN_Series3	98	9	920	3792	34	4.122	3.778