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Chemometric Data Analysis Using Artificial Neural Networks

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The on-line measurement of chemical composition under different operating conditions is an important problem in many industries. An approach based on hybrid signal preprocessing and artificial neural network paradigms for estimating composition from chemometric data has been developed. The performance of this methodology was tested with the use of near-infrared (NIR) and Raman spectra from both laboratory and industrial samples. The sensitivity-of-composition estimation as a function of spectral errors, spectral preprocessing, and choice of parameter vector was studied. The optimal architecture of multilayer neural networks and the guidelines for achieving them were also studied. The results of applications to FT-Raman data and NIR data demonstrate that this methodology is highly effective in establishing a generalized mapping between spectral information and sample composition, and that the parameters can be estimated with high accuracy.

Keywords: Artificial neural networks; Chemometric data; Composition estimation; Sensitivity analysis

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702934048406

Affiliations: Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996-2300

Publication date: January 1, 1993

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