Hydrogen based proton exchange membranes (PEM) fuel cells show good potential for production of electricity. However, widespread commercialization of PEM fuel cells will depend on cheap and environmentally benign production of hydrogen. Currently, hydrogen is mainly produced from syngas by the water-gas shift (WGS) reaction (CO+H2O↔CO2+H2) followed by preferential oxidation (PROX) of CO. Extens...

We study an optimal control problem consisting in minimizing the L∞ norm of a Borel measurable cost function, finite time, and over all trajectories associated with controlled dynamics which is reflected compact prox-regular set. The first part paper provides viscosity characterization value function for uniformly continuous costs. second concerned linear programming formulations ensued by-prod...

We consider the problem of minimizing composite functions form $$f(g(x))+h(x)$$ , where f and h are convex (which can be nonsmooth) g is a smooth vector mapping. In addition, we assume that average finite number component mappings or expectation over family random mappings. propose class stochastic variance-reduced prox-linear algorithms for solving such problems bound their sample complexities...

The aim of this paper is to study a whole class of first order differential inclusions, which fit into the framework of perturbed sweeping process by a uniformly prox-regular set. After obtaining well-posedness results, we propose a numerical scheme based on a predictioncorrection algorithm and we prove its convergence. Finally we apply these results to a problem coming from modelling of crowd ...

Taste bud cells have a limited lifespan and are continuously replaced just like other epithelial cells. Although there is some evidence that taste buds may arise from the local epithelium, taste receptor cells have neuronal properties. This implies that there must be a critical stage at which the epithelial precursor cells for taste receptor cells start to exhibit neural properties during the d...

In order to investigate a PROX microreactor performance, two-dimensional modeling of the reacting flow between two parallel plates is performed through a finite volume method using an improved SIMPLE algorithm. A three-step surface kinetics including hydrogen oxidation, carbon monoxide oxidation and water-gas shift reaction is applied for a Pt-Fe/γ-Al2O3 catalyst and operating temperatures of a...

Abstract. We propose a novel method, namely the accelerated mirror-prox (AMP) method, for computing the weak solutions of a class of deterministic and stochastic monotone variational inequalities (VI). The main idea of this algorithm is to incorporate a multi-step acceleration scheme into the mirror-prox method. For both deterministic and stochastic VIs, the developed AMP method computes the we...

The Fra ser In sti tute’s An nual Sur vey of Min ing Com pa nies 2005/2006 rec og nized Brit ish Co lum bia as hav ing the top-ranked geo log i cal da ta base in the world. More than 300 min ing, ex plo ra tion and con sult ing com pa nies re sponded and rated BC’s at trac tive ness for in vest ment in min eral ex plo ra tion and mine de vel op ment. In 2005, these min ing com pa nies in vested...

Industrial hydrogen production through methane steam reforming exceeds 50 million tons annually and accounts for 2-5% of global energy consumption. The hydrogen product, even after processing by the water-gas shift, still typically contains ∼1% CO, which must be removed for many applications. Methanation (CO + 3H2 → CH4 + H2O) is an effective solution to this problem, but consumes 5-15% of the ...