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37.
line 240 Unfortunately, ANN don’t provide any means to explain why the
model is working and in FTIR spectroscopy that is a crucial issue. FTIR
spectra include environmental interferences and noise in addition to
chemical information. The models might have been affected by these
interferences.
[Response]
Thanks for your comments. There is no one-to-one correspondent
relationship between these chemical indexes (polar compounds, free fatty
acids, hydroperoxide) and the selected peak areas, therefore they may be
not absolutely the linear relationships between the chemical indexes and
the selected peaks. Many researches also used the ANN to calibrate the
model with the spectra and other chemical index indicating it is
available for choosing ANN for this spectroscopic application (Özbalci,
et al., 2013; Wenning et al., 2010; Barmpalexis, 2018; Li, et al., 1999;
Agatonovic-Kustrin, 2013).
FTIR have many merits, FTIR has the characteristics of
measurable spectral band width, high spectral resolution, high
signal-to-noise ratio, and fast scanning speed. The FTIR uses few
optical components, no grating or prism beam splitter, which reduces the
loss of light, and further increases the light signal through
interference, so the radiation intensity reaching the detector is high
and the signal-to-noise ratio is high. Besides, the FTIR has good
reproducibility,the
Fourier transform used by the FTIR processes the light signal, avoiding
the error caused by the motor driving the grating to split light, so the
reproducibility is better. These merits might reduce the interferences
from environmental and noise.