[Classification of plastics with laser-induced breakdown spectroscopy based on principal component analysis and artificial neural network model].

The classification of seven kinds of plastic (ABS, PET, PP, PS, PVC, HDPE and PMMA) with the laser-induced breakdown spectroscopy based on artificial neural network model was investigated in the present paper. One hundred seventy LIBS spectra for each type of plastic were collected. Firstly, all 1 190 plastics LIBS spectra were studied with principal component analysis.

[Measurement of moisture and oil content in gross cottonseed based on near-infrared reflectance technique by open detecting mode].

In the present paper, the moisture and oil content in gross cottonseed analyzed by near infrared reflectance spectroscopy (NIRS) technique was studied. Including the basic theory of NIRS and advantage of open detecting mode. The calibrations of the moisture and oil content in gross cottonseed were performed.