Designing a National Music System for a Smart Concert Hall Using Neural Network and Wireless Internet of Things

Table 3

Comparison results of recommended models.

Number of music	SVD++ (MAE)	SVD++ (RMSE)	K-means (MAE)	M-means (MAE)	Hybrid model (MAE)	Hybrid model (RMSE)
10	7.56	10.69	8.37	10.45	7.25	9.76
20	7.33	10.32	8.02	10.12	6.91	9.65
30	7.21	10.24	7.61	10.05	6.85	9.49
40	7.03	10.12	7.35	10.04	6.78	9.35
50	6.95	10.03	7.12	10.01	6.76	9.29
60	6.92	6.95	7.06	9.88	6.74	9.18
70	6.91	9.93	6.99	9.74	6.73	9.13
80	6.91	9.81	6.91	9.71	6.69	9.09
90	6.85	9.58	6.85	9.67	6.66	9.04
100	6.81	9.44	6.81	9.25	6.65	8.97