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- W2080786199 abstract "A method for automatic analysis of high-dimensional spectra is presented. The method is based on a so-termed extended auto-associative neural network, which is an auto-associative (bottleneck) neural network with an additional output that corresponds to the response variable of interest. The input of the neural network consists of the absorbance at selected wavelengths. Once the model has been calibrated, the contribution of each input is estimated, the least contributing input and the corresponding output are removed (pruned), and the training procedure is repeated. This procedure leads to a compact non-linear mapping between the absorbance at a few wavelengths and the response variable of interest. The auto-associative architecture of the model prevents the overparametrization and overfitting that occur in straightforward mapping between spectra and variable of interest. Overparametrization and overfitting are further reduced by retaining only the inputs required for predicting the variable of interest. The method is illustrated on two case studies involving mid-infrared absorbance spectra. The results are compared to those obtained with partial least squares (PLS) and principal component analysis (PCA) followed by a neural network. In both case studies, the proposed approach leads to models with fewer parameters and smaller prediction errors. Copyright © 2006 John Wiley & Sons, Ltd." @default.
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- W2080786199 date "2005-09-01" @default.
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- W2080786199 title "Spectrum analysis by recursively pruned extended auto-associative neural network" @default.
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- W2080786199 doi "https://doi.org/10.1002/cem.955" @default.
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