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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
The optimization of spectral intervals, developed by siPLS and biPLS algorithm for quality compounds: (a) siPLS for TP; (b) siPLS for FAA; (c) siPLS for TP/FAA; (d) biPLS for TP; (e) biPLS for FAA; (f) biPLS for TP/FAA.