Aucott, Lorna S.; Garthwaite, Paul H. and Buckland, Stephen T.
|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1039/AN9881301849|
|Google Scholar:||Look up in Google Scholar|
Near-infrared spectra were determined for samples that differed in their particle size but not in their chemical composition. Various transformations were applied to these spectra to try to reduce differences between them; small differences between the transformed spectra indicate that the effects of particle size have been almost eliminated. Also, using other samples, equations to predict chemical composition were established by applying principal component analysis to transformed and untransformed spectra, followed by multiple linear regression. Transformations that reduced the effect of particle size also increased the predictive value of the major principal components, although the effect of transformations on the accuracy of predictions decreased as the number of components used in the equations was increased. Of the transformations examined, that which seemed most useful was u"/log(1 +u), where u= log(1/reflectance).
|Item Type:||Journal Article|
|Copyright Holders:||1988 RSC Publishing|
|Academic Unit/Department:||Mathematics, Computing and Technology > Mathematics and Statistics
Mathematics, Computing and Technology
|Depositing User:||Sara Griffin|
|Date Deposited:||20 Aug 2009 11:19|
|Last Modified:||15 Jan 2016 11:43|
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