Resumo

BERMEO, L. A; CAICEDO, E; CLEMENTI, L  e  VEGA, J. Estimation of the particle size distribution of colloids from multiangle dynamic light scattering measurements with particle swarm optimization. Ing. Investig. [online]. 2015, vol.35, n.1, pp.49-54. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.v35n1.45213.

In this paper particle Swarm Optimization (PSO) algorithms are applied to estimate the particle size distribution (PSD) of a colloidal system from the average PSD diameters, which are measured by multi-angle dynamic light scattering. The system is considered a nonlinear inverse problem, and for this reason the estimation procedure requires a Tikhonov regularization method. The inverse problem is solved through several PSO strategies. The evaluated PSOs are tested through three simulated examples corresponding to polystyrene (PS) latexes with different PSDs, and two experimental examples obtained by simply mixing 2 PS standards. In general, the evaluation results of the PSOs are excellent; and particularly, the PSO with the Trelea's parameter set shows a better performance than other implemented PSOs.

Palavras-chave : Swarm Intelligence; dynamic light scattering; inverse problem; particle swarm optimization algorithm; particle size distribution.

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