Quantitative Detection of Quartz Sandstone SiO₂ Grade Using Polarized Infrared Absorption Spectroscopy with Convolutional Neural Network Model

Table 3

Descriptive statistics of sample set.

Sample set	Number	SiO2 grade (%)
		Min	Max	Mean	Standard deviation
Train set	45	70.67	98.36	82.28	8.31
Validation set	20	72.60	96.16	82.33	7.08