Table 2. CNN based recommendation system performance.

Combination	Confusion matrix				Parameters				Performance indexes
	Category	H	M	L	TP	FP	TN	FN	Acc	Re	Pr	F1
CNN + SGD	High	185	34	31	185	56	444	65	83.87	74.00	88.80	80.73
	Medium	29	192	29	192	62	438	58	84.00	76.80	87.60	81.85
	Low	27	28	195	195	60	440	55	84.67	78.00	88.00	82.70
CNN + RMSProp	High	195	27	28	195	39	461	55	87.47	78.00	92.20	84.51
	Medium	20	209	21	209	47	453	41	88.27	83.60	90.60	86.96
	Low	19	20	211	211	49	451	39	88.27	84.40	90.20	87.20
CNN + Adam	High	222	12	16	222	23	477	28	93.20	88.80	95.40	91.98
	Medium	13	225	12	225	23	477	25	93.60	90.00	95.40	92.62
	Low	10	11	229	229	28	472	21	93.47	91.60	94.40	92.98