![]() For this purpose, in this work a modification of the BCR procedure was applied to residues and contaminated soils from three mining zones of Mexico and two mining zones of Spain, spanning samples with acidic to alkaline pH values. Therefore, fractionation studies in residues and soils are required to analyze the mobility and bioavailability of this metal, which in turn provide information to infer its speciation. Mining and metallurgy generate residues that may contain thallium (Tl), a highly toxic metal, for which it is currently not feasible to determine its geochemical speciation through X-ray absorption spectroscopy due to a combination of very low contents and the interference of accompanying high arsenic contents. High-order fractional partial differential equation transform for molecular surface constructionįractionation and mobility of thallium in areas impacted by mining-metallurgical activities: Identification of a water-soluble Tl(I) fraction.Ĭruz-Hernández, Yusniel Ruiz-GarcÃa, Mismel Villalobos, Mario Romero, Francisco Martin Meza-Figueroa, Diana Garrido, Fernando Hernández-Alvarez, Elizabeth Pi-Puig, Teresa Extensive numerical experiments and comparison with an established surface model We further validate the present method by examining some benchmark indicators of macromolecular surfaces, i.e., surface area, surface enclosed volume, surface electrostatic potential and solvation free energy. Computational efficiency of the present surface generation method is compared with the MSMS approach in Cartesian representation. ![]() The effect of the propagation time on the quality of resulting molecular surfaces is also studied. Consequently, the fractional PDE transform enables the mode decomposition of images, signals, and surfaces. We demonstrate that the use of arbitrarily high-order derivatives gives rise to time-frequency localization, the control of the spectral distribution, and the regulation of the spatial resolution in the fractional PDE transform. We also construct fractional PDE transform based on arbitrarily high-order fractional PDEs. The impact of high-order fractional derivatives to surface analysis is examined. We first validate the proposed method with a variety of test examples in two and three-dimensional settings. The proposed high-order fractional PDEs are applied to the surface generation of proteins. A fast fractional Fourier transform (FFFT) is proposed to numerically integrate the high-order fractional PDEs so as to avoid stringent stability constraints in solving high-order evolution PDEs. The fractional PDEs are constructed via fractional variational principle. ![]() This work introduces arbitrarily high-order fractional partial differential equations (PDEs) to describe fractional hyperdiffusions. In general, it is not obvious what role a high fractional derivative can play and how to make use of arbitrarily high-order fractional derivatives. However, only relatively low order fractional derivatives are used at present. High-order fractional partial differential equation transform for molecular surface construction.įractional derivative or fractional calculus plays a significant role in theoretical modeling of scientific and engineering problems.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |