2. Concoction displaying. Fitting information to display (Hard model)Fitting model to information (delicate model). 3. Multicomponent Curve Resolution. Objective: Given an I x J network, D, of N species, decide N and the unadulterated spectra of each specie.Model: DIxJ = CIxN SNxJ. Normal assumptions:Non-negative spectra and concentrationsUnimodal concentrationsKinetic profiles.