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The crude protein(CP) content is an important index to evaluate the quality of fish feed. Near infrared spectroscopy (NIRS) is often applied when a rapid quantization of CP content in feed is required. 240 samples of 4 fish feed brands (Takara sakana-ii, Shangpin, WEIYE and Clever fish) were collected for calibration models by partial least squares (PLS) and artificial neural network (ANN). Firstly,...
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...
A new method for the discrimination of peach varieties by Vis/near infrared reflectance spectroscopy (NIRS) (325-1075nm) was developed. A relationship has been established between the reflectance spectra and peach varieties. The set was consisted of a total of 90 samples of peaches. First, the data was analyzed by principal component analysis (PCA). PCA compressed thousands of spectral data into a...
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