Due to widespread use of Global Positioning System (GPS) in different applications, the issue of GPS signal interference cancelation is becoming an increasing concern. One of the most important intentional interferences is spoofing signals. An effective interference (delay spoof) reduction method based on adaptive filtering is developed in this paper. The principle of method is using adaptive f...

A mathematical model for commercial naphtha catalytic reformer of Tehran refinery was developed. This model includes three sequencing fixed beds of Pt/Al2O3 catalyst at the steady state condition using detailed kinetic scheme involving 26 pseudo-components connected by a network of 47 reactions, in the range of C6 to C9 hydrocarbons. The reaction network consisted dehy...

relative to a hereditary torsion theory $tau$ we introduce a dimension for a module $m$, called {em $tau$-rank of} $m$, which coincides with the reduced rank of $m$ whenever $tau$ is the goldie torsion theory. it is shown that the $tau$-rank of $m$ is measured by the length of certain decompositions of the $tau$-injective hull of $m$. moreover, some relations between the $tau$-rank of $m$ and c...

to diffusion, a convection term is present. Our overall aim is to look at the effect of convection on the existence and What is the long-time effect of adding convention to a discretised reaction-diffusion equation? For linear problems, it is well known stability of the true and spurious fixed points. that convection may denormalise the process, and, in particular, The potential denormalising e...

Hydrolysis of fluorescent GTP analogues BODIPY FL guanosine 5 '-O-(thiotriphosphate) (BGTPgammaS) and BODIPY FL GTP (BGTP) by Galpha(i1) and Galpha was characterized using on-line capillary electrophoresis (o) laser-induced fluorescence assays in order that changes in sub-strate, substrate-enzyme complex, and product could be monitored separately. Apparent k values (V /[E]) (max cat) steady-sta...

What is the long-time eeect of adding convection to a discretised reaction-diiusion equation? For linear problems, it is well known that convection may denormalise the process, and, in particular, eigenvalue-based stability predictions may be over-optimistic. This work deals with a related issue| with a nonlinear reaction term, the non-normality can greatly innuence the long-time dynamics. For ...

This paper considers the modeling and control of a tubular fixed bed reactor with recycle stream for dimethyl ether (DME) production. For simulation purposes, a pseudo homogeneous model has been developed. By reactor simulation under steady state condition, effects of parameters such as feed rate, pressure and shell temperature are investigated. Using the steady state model, an optimizer that m...

We used a molecular dynamics simulation with the modified Brenner reactive empirical bond order potential to investigate the erosion of a graphite surface due to the incidence of hydrogen, deuterium, and tritium atoms. Incident particles cause pressure on the graphite surface, and the chemical bond between graphene layers then generates heat to erode the graphite surface. We evaluated the speed...

The quantitative evaluation of errors caused by different components of a numerical algorithm including approximation error and iteration error are of significant current interest [13]. Iterative methods are commonly used for solving steady CFD problems. The simplest technique involves the temporal evolution from an initial guess to obtain the steady solution. This approach implies iterations a...