[Retracted] The Impact of Digital Technology on the Optimization of Higher Education Teaching Models in an Epidemic Environment

Table 2

RMSE for different similarity models.

Similarity model/neighborhood number K	10	20	30	40
Sim	1.143	1.113	1.091	1.105
Sim-h	1.125	1.084	1.032	1.042
Sim-f	1.123	1.078	1.035	1.057
Sim-mix	1.110	1.048	0.983	0.996