Table 1.

Results of selected optimal spectral subintervals for prediction of SH and SS in in the ultrasound treatment process.

Parameters	Number of Subintervals	Selected Subintervals	PCs	Rc	RMSEC	Rp	RMSEP
SH (μmol/g)	15	[4, 5, 6, 14]	10	0.9302	0.39	0.7930	0.76
	16	[4, 5, 13, 15]	9	0.9325	0.38	0.7162	0.94
	17	[1, 4, 7]	4	0.9226	0.40	0.8514	0.58
	18	[1, 4, 11]	5	0.9200	0.41	0.8662	0.57
	19	[1, 3, 5]	5	0.9192	0.41	0.8188	0.63
	20	[1, 5, 8, 17]	10	0.9405	0.36	0.8488	0.64
	21	[4, 5, 13]	6	0.9348	0.37	0.8930	0.53
	22	[4, 9, 19]	10	0.9334	0.38	0.7773	0.91
	23	[5, 7, 18, 21]	10	0.9381	0.37	0.7410	0.95
	24	[2, 6, 9]	8	0.9344	0.37	0.8021	0.66
	25	[2, 4, 6, 7]	7	0.9331	0.37	0.8441	0.60
	26	[2, 4, 8, 23]	10	0.9512	0.32	0.7423	0.93
	27	[2, 4, 8, 24]	10	0.9512	0.33	0.7423	0.93
	28	[2, 5, 10, 25]	10	0.9366	0.37	0.8122	0.76
	29	[2, 5, 7]	9	0.9380	0.36	0.8126	0.66
	30	[2, 6, 11, 25]	10	0.9447	0.35	0.7615	0.93
SS (μmol/g)	15	[1, 3, 8, 10]	9	0.6298	8.28	0.6236	7.40
	16	[2, 3, 6, 7]	6	0.6087	8.17	0.4910	8.17
	17	[9, 10, 11, 16]	2	0.5667	7.52	0.6756	9.16
	18	[14, 17, 18]	7	0.6153	7.40	0.5898	9.47
	19	[4, 10, 22, 27]	10	0.8056	5.52	0.5266	12.10
	20	[1, 2, 5]	5	0.5571	8.25	0.4175	8.53
	21	[7, 14, 18]	7	0.6481	6.99	0.4884	10.60
	22	[9, 10, 20]	2	0.5833	7.40	0.6731	7.95
	23	[8, 17, 18, 21]	10	0.7238	6.38	0.4840	11.40
	24	[8, 10, 11, 20]	10	0.4842	9.56	0.5399	9.33
	25	[8, 15, 18]	8	0.6665	6.83	0.3248	12.60
	26	[2, 9, 20, 22]	10	0.7045	6.54	0.5664	9.91
	27	[2, 7, 24]	8	0.6952	6.63	0.5358	9.53
	28	[2, 14, 7, 26]	9	0.6505	7.01	0.6660	7.90
	29	[10, 17, 27]	7	0.6683	6.72	0.6123	8.30
	30	[10, 17, 28]	7	0.6489	6.91	0.6186	8.25