In this study, the ultrafiltration membrane for humic substance removal was prepared by blending polysulfone with a high concentration of PEG400 as additives. The influences of the additive to the fouling resistance capability and humic substances rejection of the polysulfone membrane were investigated. The addition of 35%wt of PEG400 concentration improved the pure water flux up to 200, but re...

We apply the well-known Banach-Nečas-Babuška inf-sup theory in a stochastic setting to introduce a weak space-time formulation of the linear stochastic heat equation with additive noise. We give sufficient conditions on the the data and on the covariance operator associated to the driving Wiener process, in order to have existence and uniqueness of the solution. We show the relation of the obta...

High-quality absorber films are imperative for highly efficient Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells. Precursor solution chemistry, interconnected with nucleation and the crystal growth process, should be studied insightfully. Thus, creative rationales strategies could proposed to improve quality, carrier characteristics, hence device performance. However, research on precursor chemist...

AND/OR graphs and minimum-cost solution graphs have been studied extensively in artificial intelligence (see, e.g., Nilsson [14]). Generally, the AND/OR graphs are used to model problem solving processes. The minimum-cost solution graph can be used to attack the problem with the least resource. However, in many cases we want to solve the problem within the shortest time period and we assume tha...