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Аннотация:Photosynthetic pigment-protein complexes are the essential parts of thylakoidmembranes of higher plants and cyanobacteria. Besides many organic and inorganic moleculesthey contain pigments like chlorophyll, bacteriochlorophyll, and carotenoids, which absorb theincident light and transform it into the energy of the excited electronic states. The semiclassicaltheories such as molecular exciton theory and the multimode Brownian oscillator model allowsus to simulate the linear and nonlinear optical response of any pigment-protein complex,however, the main disadvantage of those approaches is a significant amount of effectiveparameters needed to be found in order to reproduce the experimental data. To overcome thesedifficulties we used the Differential evolution method (DE) that belongs to the family ofevolutionary optimization algorithms. Based on our preliminary studies of the linear opticalproperties of monomeric photosynthetic pigments using DE, we proceed to more complexsystems like the reaction center of photosystem II isolated from higher plants (PSIIRC).PSIIRC contains only eight chlorophyll pigments, and therefore it is potentially a verypromising subject to test DE as a powerful optimization procedure for simulation of the opticalresponse of a system of interacting pigments. Using the theoretically simulated linear spectraof PSIIRC (absorption, circular dichroism, linear dichroism, and fluorescence), we investigatedthe dependence of the algorithm convergence on DE settings: strategies, crossover, weightingfactor; eventually finding the optimal mode of operation of the optimization procedure.