Evaluation of natural ageing responses on Burmese amber durability by FTIR spectroscopy with PLSR and ANN models

Xingping Li, Yamei Wang,Guanghai Shi,Ren Lu,Yan Li

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy（2023）

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摘要

•A nondestructive way to calculate the Vickers harness of Burmese amber is proposed.•The calibration models use PLSR linear and ANN nonlinear regressions.•The CARS method selects the sensitive spectral variables and optimizes PLSR/ANN models.

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关键词

Ageing amber,FTIR spectroscopy,Vickers hardness,Regression models,CARS algorithm

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