Kazan state Federal University E-Archive :: Browsing by Author "Dautov R."

A new method for the computation of eigenmodes in dielectric waveguides

Kornilov G.; Dautov R.; Karchevskii E. (2004)

A new method for the computation of eigenmodes in Isotropic cylindrical loss-free dielectric waveguides is proposed. Such waveguide is a cylindrical structure with the refractive index n not varied along the generatrix of ...

A numerical method for finding dispersion curves and guided waves of optical waveguides

Dautov R.; Karchevskii E.; Kornilov G. (2005)

The original problem in an unbounded domain is reduced to a linear parametric eigenvalue problem in a circle, which is convenient for numerical solution. The examination of the solvability of this problem is based on the ...

A sharp error estimate of the best approximation by algebraic polynomials in the weighted space L2(-1, 1)

Dautov R. (2013)

We obtain an exact error estimate of the best approximation by algebraic polynomials in the Lebesgue space L2 (-1, 1) with the weight 1 - x2 of degreeλ > -1. © Allerton Press, Inc., 2013.

Abstract theory of hybridizable discontinuous Galerkin methods for second-order quasilinear elliptic problems

Dautov R.; Fedotov E. (2014)

An abstract theory for discretizations of second-order quasilinear elliptic problems based on the mixed-hybrid discontinuous Galerkin method. Discrete schemes are formulated in terms of approximations of the solution to ...

Accuracy of discrete schemes for a class of abstract evolution inequalities

Dautov R.; Mikheeva A. (2013)

For a triple of Hilbert spaces {V, H, V*}, we study a discrete and a semidiscrete scheme for an evolution inclusion of the form u′(t) + A(t)u(t) + ∂φ{symbol}(t, u(t)) ∋ f(t), u(0) = u 0, t ∈ (0, T], where the pair {A(t), ...

Approximations of Evolutionary Inequality with Lipschitz-continuous Functional and Minimally Regular Input Data

Dautov R.; Lapin A. (2019)

© 2019, Pleiades Publishing, Ltd. The convergence and accuracy of approximations of evolutionary inequality with a linear bounded operator and a convex and Lipschitz-continuous functional are investigated. Four types of ...

Automating iot data-intensive application allocation in clustered edge computing

Dautov R.; Distefano S. (2021)

Enabling data processing at the network edge, as close to the actual source of data as possible, is a challenging, yet realistic goal to be achieved by the Internet of Things (IoT), which still primarily relies on the Cloud ...

Data Processing in Cyber-Physical-Social Systems Through Edge Computing

Dautov R.; Distefano S.; Bruneo D.; Longo F.; Merlino G.; Puliafito A. (2018)

© 2013 IEEE. Cloud and Fog computing have established a convenient and widely adopted approach for computation offloading, where raw data generated by edge devices in the Internet of Things (IoT) context is collected and ...

Discontinuous Galerkin schemes for nonstationary convection-diffusion problems

Dautov R.; Fedotov E. (2016)

© Published under licence by IOP Publishing Ltd.In this paper we analyse an approximation of linear nonstationary convection- diffusion problem based on combination of discontinues Galerkin method for time discretisation ...

Discontinuous mixed penalty-free Galerkin method for second-order quasilinear elliptic equations

Dautov R.; Fedotov E. (2013)

Discrete schemes for finding an approximate solution of the Dirichlet problem for a second-order quasilinear elliptic equation in conservative form are investigated. The schemes are based on the discontinuous Galerkin ...

Distributed data fusion for the internet of things

Dautov R.; Distefano S. (2017)

© Springer International Publishing AG 2017. The ubiquitous Internet of Things is underpinned by the recent advancements in the wireless networking technology, which enabled connecting previously scattered devices into the ...

Double nuclear magnetic resonance and crystal chemistry at the lattice positions of diamagnetic atoms, both structural, and foreign

Shchepkin V.; Vainshtein D.; Dautov R.; Vinokurov V. (1980)

Double nuclear magnetic resonance (DNMR) with Jeener's pulsed sequence on proton and fluorine frequencies was used to investigate the electric quadrupole interactions of (i) <sup>23</sup>Na in Na<inf>2</inf>Cd(SO<inf>4</ ...

Dynamic capillary pressure mechanism for instability in gravity-driven flows; review and extension to very dry conditions

Nieber J.; Dautov R.; Egorov A.; Sheshukov A. (2005)

Several alternative mathematical models for describing water flow in unsaturated porous media are presented. These models are based on an equation for conservation of mass of water, and a generalized linear law for water ...

Dynamic capillary pressure mechanism for instability in gravity-driven flows; Review and extension to very dry conditions

Nieber J.; Dautov R.; Egorov A.; Sheshukov A. (2005)

Several alternative mathematical models for describing water flow in unsaturated porous media are presented. These models are based on an equation for conservation of mass of water, and a generalized linear law for water ...

Enabling Workload Engineering in Edge, Fog, and Cloud Computing through OpenStack-based Middleware

Merlino G.; Dautov R.; Distefano S.; Bruneo D. (2019)

© 2019 Association for Computing Machinery. To enable and support smart environments, a recent ICT trend promotes pushing computation from the remote Cloud as close to data sources as possible, resulting in the emergence ...

Error estimates for a Galerkin method with perturbations for spectral problems of the theory of dielectric waveguides

Dautov R.; Karchevskii E. (2016)

© 2016, Pleiades Publishing, Ltd.We obtain error estimates for a Galerkin method with perturbations for approximating eigenvalues and eigenfunctions of one class of abstract spectral problems. Using these results, we get ...

Exact penalty operators and regularization of parabolic variational inequalities with an obstacle inside a domain

Dautov R.; Mikheeva A. (2008)

A class of parabolic variational inequalities with zero obstacle inside the domain is considered. For this class, exact penalty operators are defined, which are then used to construct and study regularization methods. The ...

Finite element approximation and iterative method solution of elliptic control problem with constraints to gradient of state

Dautov R.; Lapin A. (2015)

© 2015, Pleiades Publishing, Ltd. An optimal control problem with distributed control in the right-hand side of Poisson equation is considered. Pointwise constraints on the gradient of state and control are imposed in this ...

Foam patterning in porous media

Dautov R.; Kornev K.; Mourzenko V. (1997)

We consider a model of patterning of one-dimensional foam-bubble chain confined in a bamboolike capillary. The discrete model of such a foam describes a distribution of foam films - lamellae that, like "bridges," span a ...

HDG schemes for stationary convection-diffusion problems

Dautov R.; Fedotov E. (2016)

© Published under licence by IOP Publishing Ltd.For stationary linear convection-diffusion problems, we construct and study a hybridized scheme of the discontinuous Galerkin method on the basis of an extended mixed statement ...

Browsing by Author "Dautov R."

Browsing by Author "Dautov R."

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