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On the fractional-order modeling of wine
- Lopes, António M., Machado, J. A. Tenreiro, Ramalho, Elisa
- European food research & technology 2017 v.243 no.6 pp. 921-929
- multidimensional scaling, dielectric spectroscopy, models, chemical analysis, wines
- This paper uses electrical impedance spectroscopy for characterizing different varieties of wine and compares the results with standard chemical analysis. In a first phase, the electrical impedance of wine samples is measured and modeled by means of fractional-order transfer functions. The impedance model parameters are then correlated with chemical data to unveil potential relationships between the distinct descriptions. In a second phase, the multidimensional scaling technique is adopted for data clustering and visualizing. The methodology is illustrated on a set of commercially available wines. The results demonstrate that fractional-order models represent conveniently the impedance of wine, with a reduced number of parameters.