Table 3. The performance comparison based on Douban dataset.

Training	Metrics	HeatS	PMF (baseline)	HP	SR	EISR (JC)	EISR (CN)	EISR (PA)	EISR (RAI)
60%	MAE	0.6482	0.6378	0.6376	0.6282	0.6168	0.6084	0.5985	0.5927
60%	RMSE	0.8024	0.7912	0.7911	0.7802	0.7681	0.7625	0.7558	0.7515
80%	MAE	0.6370	0.6277	0.6274	0.6093	0.5937	0.5898	0.5783	0.5730
80%	RMSE	0.7881	0.7794	0.7792	0.7615	0.7590	0.7545	0.7451	0.7435
90%	MAE	0.6234	0.6163	0.6161	0.5983	0.5883	0.5862	0.5783	0.5741
90%	RMSE	0.7764	0.7601	0.7600	0.7588	0.7501	0.7456	0.7386	0.7366