In generalized semi-infinite programming the feasible set is known to be not closed in general. In this paper, under natural and generic assumptions, the closure of the feasible set is described in explicit terms.

This study established a reactive transport model (RTM) for saturated cement-based materials based on multi-ionic through an uncharged, ‘free water’ and charged, ‘the electrical double layer’ coupled with chemical equilibrium interaction between pore solution solid phase. A set of modified Poisson-Nernst-Planck equations, including the effect temperature, property, structure changes, have been ...

An experimental study, using size measurements, X-ray diffraction (XRD), scanning electron microscopy (SEM) and inverse gas chromatography at infinite dilution (IGC-ID) finite concentration (IGC-FC) conditions, has been carried out to evaluate, respectively, the changes of particles size, crystalline phases, morphology surface properties evolution attapulgite powder after grinding in wet media....

A hierarchical hybrid method combining experimental-database-derived estimation of extraction performance, quantitative structure–property relationship (QSPR)-based assessment IL physical and environmental properties, liquid–liquid (LLE) measurement, process evaluation is proposed to screen practically suitable ionic liquid (IL) solvents for different extractions. From the literature, 47 424 in...

In the present work, vinyl benzyl chloride (VBC) was polymerized by using free radical polymerization. The obtained PVBC reacted with dibutyl amine to obtain tertiary modified polystyrene based polymer (PVBC-Dibutyl amine). inverse gas chromatography (IGC) method used examine thermodynamic properties of polymer. Firstly, retention diagrams some polar and non-polar solvents on PVBC-Dibutyl were ...

This work discusses the potential of two phosphonium-based ionic liquids (ILs), [P6,6,6,14]Cl and [P6,6,6,14][(C8H17)2PO2], one methylimidazolium-based IL, [C4mim][OAc], as entrainers in fractionation terpene mixtures, desulfurization denitrification fuel oils, separation aromatics from aliphatic hydrocarbons. To this aim, activity coefficients at infinite dilution 45 solutes were obtained by g...

in this paper we consider the group algebra $r(c_2times‎ ‎d_infty)$‎. ‎it is shown that $r(c_2times d_infty)$ can be‎ ‎represented by a $4times 4$ block circulant matrix‎. ‎it is also‎ ‎shown that $mathcal{u}(mathbb{z}_2(c_2times d_infty))$ is‎ ‎infinitely generated‎.

‎linear semi-infinite programming problem is an important class of optimization problems which deals with infinite constraints‎. ‎in this paper‎, ‎to solve this problem‎, ‎we combine a discretization method and a neural network method‎. ‎by a simple discretization of the infinite constraints,we convert the linear semi-infinite programming problem into linear programming problem‎. ‎then‎, ‎we use...