Non-destructive prediction method of Yuan'an yellow tea boredom time based on least squares support vector machine
A technology of support vector machine and least squares, applied in the direction of measuring devices, instruments, biological neural network models, etc., can solve the problems of tea quality degradation and the inability to accurately grasp the time of dryness in real time, and achieve objective and accurate prediction of sample dryness Yellow time, effect of increasing robustness
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[0082] (1) Fresh leaf sample collection and classification
[0083] Collect single bud (stemless), one bud and one leaf (consisting of single bud, first leaf and longer stem) and one bud and two leaves (consisting of single bud, first leaf, second leaf) of Anji white tea varieties in Yuan'an County, Hubei Province and long stalks) 120 samples of fresh leaves from three different parts. After the sample is finished, the yellowing is carried out, and the yellowing time is accurately recorded at the same time. According to the different yellowing time, the samples were divided into two sets of calibration set and verification set according to the ratio of 3:1, of which 90 samples were in the calibration set and 30 samples in the verification set were used to test the robustness of the calibration set model.
[0084] (2) Spectrum scanning
[0085] Using Thermo Fisher Scientific Antaris II Fourier transform near-infrared spectrometer (FT-NIR) and an integrating sphere diffuse ref...
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