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A nondestructive optical method for determining the geographic origins of rice was investigated. Average absorption spectra of rice for three different geographic origins were analyzed. Direct orthogonal signal correction (DOSC), standard normal variate transformation (SNV) combined with detrending, multiply scatter calibration (MSC) and Savitzky-Golay second-order derivative transformation (S.Golay...
Pattern recognition problems specifically for spectral data were developed. As an application, classification of four tea varieties based on near infrared spectra was taken by using the method. Factor analysis (FA) and artificial neural networks (ANN) were used for pattern recognition in this research. FA is a very effective data mining way; it was applied to enhance species features and reduce data...
BP neural network is a nonlinear dynamical system widely-used in forecasting target values influenced by diverse variables. Its redundant input nodes often generate imprecision in the predict results. By introducing rough set and grey relation theories, condition attributes were considered as correlation sequences and decision attributes as reference sequences. The grey correlation coefficients represented...
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