A comparison analysis between partial least squares and Neural Network in non-invasive blood glucose concentration monitoring system

A non-invasive blood glucose monitoring system with six laser diodes is used to obtain a total of 290 NIR spectra from the oral glucose tolerance test (OGTT) experiment with the participation of a healthy volunteer over 4 days. Each laser diode operates at the discrete wavelengths between 1500 nm and 1800 nm with the power of 6 mW each. A comparative analysis using the partial least squares (PLS) model and the neural network (NN) model is studied. The study shows that the NN model performs better than the PLS model due to the presence of nonlinearity in the collected data. The presence of the nonlinearity is tested by using the Durbin-Watson test.