Automated optimization of water-water interaction parameters for a coarse-grained model.
Automated optimization of water-water interaction parameters for a coarse-grained model.
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DOI:
10.1021/jp409545x
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发表时间:
2014-02-13
期刊:
影响因子:
--
通讯作者:
Pandit SA
中科院分区:
文献类型:
--
作者:
Fogarty JC;Chiu SW;Kirby P;Jakobsson E;Pandit SA
We have developed an automated parameter optimization software framework (ParOpt) that implements the Nelder–Mead simplex algorithm and applied it to a coarse-grained polarizable water model. The model employs a tabulated, modified Morse potential with decoupled short- and long-range interactions incorporating four water molecules per interaction site. Polarizability is introduced by the addition of a harmonic angle term defined among three charged points within each bead. The target function for parameter optimization was based on the experimental density, surface tension, electric field permittivity, and diffusion coefficient. The model was validated by comparison of statistical quantities with experimental observation. We found very good performance of the optimization procedure and good agreement of the model with experiment.
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