Abstract
Mathematical methods based on evolutionary factor analysis are applied to the doping-undoping processes of poly(3-methylthiophene). Two new methods are developed in this work: differential evolutionary factor analysis (DEFA), which is sensitive to changes in the composition of the mixture during the evolution process, and the projection matrix method, which can be used to annihilate the influence of a known spectrum from a set of measured spectra in order to obtain information about the unknown components.
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