System stability is a basic concept in courses on dynamic system analysis and control for undergraduate students with computer science backgrounds. Typically, this was taught using a simple simulation example of an inverted pendulum. Unfortunately, many difficult issues arise in the learning and understanding of the concepts of stability, instability, and marginal stability. Instead, the author…
The task of setup planning is to determine the number and sequence of setups and the machining features or operations in each setup. Due to the locating method’s character, the position of the locators may keep away joining tools from arriving at joining points during the joining process of sheet metal. In order to solve these problems, a novel method is proposed, which consists of three part…
Abstract For hybrid electric vehicle traction applications, energy storage devices with high power density and energy efficiency are required.Aprimary attribute of supercapacitors is that they retain their high power density and energy efficiency even at −30 ◦C, the lowest temperature at which unassisted starting must be provided to customers. More abuse-tolerant electrolytes are preferred…
Abstract. The molecular mechanism of the water–gas shift reaction catalyzed by titanium carbide compounds was studied using a density functional approach. Three different catalyst models have been considered: the extended TiC(001) surface, the Ti8C12 MetCar, and a Ti14C13 nanoparticle. Adsorption of reactants, intermediates, and products occurs on different sites, demonstrating the chemic…
Abstract. Phosphate removal is important in the control of eutrophication of water bodies and adsorption is one of the promising approaches for this purpose. A Fe–Mn binary oxide adsorbent with a Fe/Mn molar ratio of 6:1 for phosphate removal was synthesized by a simultaneous oxidation and coprecipitation process. Laboratory experiments were carried out to investigate adsorption kinetics …
Abstract. Multilayer films of tungstophosphate anion (P2W18) and poly(allylamine hydrochloride) (PAH) were fabricated on quartz and ITO substrates by layer-by-layer self-assembly method. These films were characterized by UV–vis spectroscopy, cyclic voltammetry (CV), chronoamperometric (CA), chronocoulometry (CC) and atomic force microscopy (AFM). The effects of film structure on multilaye…
The effects of two kinds of representative catalysts, Ni/Al2O3 and HZSM-5 zeolite, were investigated in the CO2 reforming of CH4 via corona plasma reactions at atmospheric pressure. The catalysts showed little effect on the conversions of CH4 and CO2, and we propose that rapid free-radical processes play a main role during the plasma reactions. However, although a high-voltage electric field…