Non-destructive testing of mechanical properties of solid wood panel based on partial least squares structural equation modeling transfer method

Calibration transfer between near infrared (NIR) spectrometers is a subtle issue in the chemometrics and process industry. Similar instruments may generate strongly different spectral responses, regression models developed on first NIR system can rarely be used with spectra collected by second apparatus. In this work, two novel methods based Structural Equation Modeling (SEM), called Enhanced Feature Extraction Approaches for factor analysis (EFEA-FA) space transformation (EFEA-SST), were proposed to perform calibration spectrometers. They applied nondestructive testing model solid wood panels mechanical properties. Four standardization algorithms evaluated transferring quality databases portable NIRS (InGaAs)-array spectrometer (NIRquest512) HSI Camera (SPECIM FX17). The results showed that EFEA-SST yielded best evaluation metrics (R2 Root Mean Square Error of Prediction (RMSEP)) values tensile strength (RMSEP=11.309, R2=0.865) parameters, while EFEA-FA gave fit flexural (RMSEP=10.653, R2=0. 912). These suggest potential parameters prediction transferred diverse