Search Results - "Lubin, G."

Numerical Algorithms for Identification of Convection Coefficient and Source in a Magnetohydrodynamics Flow by Kandilarov, Juri D., Vulkov, Lubin G.

“…We consider three integral observations inverse problems (IP1, IP2, IP3) for reconstruction of a time-dependent convection coefficient and a source in…”
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Numerical Identification of External Boundary Conditions for Time Fractional Parabolic Equations on Disjoint Domains by Koleva, Miglena N., Vulkov, Lubin G.

“…We consider fractional mathematical models of fluid-porous interfaces in channel geometry. This provokes us to deal with numerical identification of the…”
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Numerical Solution of External Boundary Conditions Inverse Multilayer Diffusion Problems by Koleva, Miglena N., Vulkov, Lubin G.

“…The present study is concerned with the numerical solution of external boundary conditions in inverse problems for one-dimensional multilayer diffusion, using…”
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A Galerkin Finite Element Method for the Reconstruction of a Time-Dependent Convection Coefficient and Source in a 1D Model of Magnetohydrodynamics by Koleva, Miglena N., Vulkov, Lubin G.

“…The mathematical analysis of viscous magnetohydrodynamics (MHD) models is of great interest in recent years. In this paper, a finite element Galerkin method is…”
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Inverse Boundary Conditions Interface Problems for the Heat Equation with Cylindrical Symmetry by Koleva, Miglena N, Vulkov, Lubin G

“…In this paper, we study inverse interface problems with unknown boundary conditions, using point observations for parabolic equations with cylindrical…”
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Positive Fitted Finite Volume Method for Semilinear Parabolic Systems on Unbounded Domain by Koleva, Miglena N., Vulkov, Lubin G.

“…This work deals with a semilinear system of parabolic partial differential equations (PDEs) on an unbounded domain, related to environmental pollution…”
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Numerical Reconstruction of Time-Dependent Boundary Conditions to 2D Heat Equation on Disjoint Rectangles at Integral Observations by Koleva, Miglena N., Vulkov, Lubin G.

“…In this paper, two-dimensional (2D) heat equations on disjoint rectangles are considered. The solutions are connected by interface Robin’s-type internal…”
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A Quasilinearization Approach for Identification Control Vectors in Fractional-Order Nonlinear Systems by Koleva, Miglena N., Vulkov, Lubin G.

“…This paper is concerned with solving the problem of identifying the control vector problem for a fractional multi-order system of nonlinear ordinary…”
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Numerical Recovering of Space-Dependent Sources in Hyperbolic Transmission Problems by Koleva, Miglena N, Vulkov, Lubin G

“…A body may have a structural, thermal, electromagnetic or optical role. In wave propagation, many models are described for transmission problems, whose…”
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Inverse Problem Numerical Analysis of Forager Bee Losses in Spatial Environment without Contamination by Atanasov, Atanas Z., Koleva, Miglena N., Vulkov, Lubin G.

“…We consider an inverse problem of recovering the mortality rate in the honey bee difference equation model, that tracks a forage honeybee leaving and entering…”
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Numerical Identification of Boundary Conditions for Richards’ Equation by Koleva, Miglena N., Vulkov, Lubin G.

“…A time stepping quasilinearization approach to the mixed (or coupled) form of one and two dimensional Richards’ equations is developed. For numerical solution…”
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Numerical Reconstruction of the Source in Dynamical Boundary Condition of Laplace’s Equation by Koleva, Miglena N., Vulkov, Lubin G.

“…In this work, we consider Cauchy-type problems for Laplace’s equation with a dynamical boundary condition on a part of the domain boundary. We construct a…”
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Numerical Solution of the Retrospective Inverse Parabolic Problem on Disjoint Intervals by Koleva, Miglena N., Vulkov, Lubin G.

“…The retrospective inverse problem for evolution equations is formulated as the reconstruction of unknown initial data by a given solution at the final time. We…”
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Weak and Classical Solutions to Multispecies Advection–Dispersion Equations in Multilayer Porous Media by Koleva, Miglena N., Vulkov, Lubin G.

“…The basic model motivating this work is that of contaminant transport in the Earth’s subsurface, which contains layers in which analytical and semi-analytical…”
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Analysis of second order difference schemes on non-uniform grids for quasilinear parabolic equations by Matus, Piotr, Hieu, Le Minh, Vulkov, Lubin G.

“…On the base of the maximum principles two-sided estimates for solutions of difference schemes are proved without any assumption of sign-definiteness of input…”
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Numerical Analysis of Direct and Inverse Problems for a Fractional Parabolic Integro-Differential Equation by Koleva, Miglena N., Vulkov, Lubin G.

“…A mathematical model consisting of weakly coupled time fractional one parabolic PDE and one ODE equations describing dynamical processes in porous media is our…”
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Numerical Solution of Fractional Models of Dispersion Contaminants in the Planetary Boundary Layer by Koleva, Miglena N., Vulkov, Lubin G.

“…In this study, a numerical solution for degenerate space–time fractional advection–dispersion equations is proposed to simulate atmospheric dispersion in…”
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Parameters Estimation in a Time-Fractiona Parabolic System of Porous Media by Koleva, Miglena N., Vulkov, Lubin G.

“…The simultaneous estimation of coefficients and the initial conditions for model fractional parabolic systems of porous media is reduced to the minimization of…”
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Numerical solution of time-fractional Black–Scholes equation by Koleva, Miglena N., Vulkov, Lubin G.

“…In this paper we present a numerical method for a time-fractional Black–Scholes equation, which is used for modeling the fractional structure of the financial…”
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Fitted finite volume method for indifference pricing in an exponential utility regime-switching model by Gyulov, Tihomir B., Koleva, Miglena N., Vulkov, Lubin G.

“…We consider one-dimensional systems of weakly coupled degenerate semi-linear parabolic equations for buyer’s and writer’s pricing of European options under…”
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