Search Results - subject:"Finite element method"

Numerical analysis of a nonlocal parabolic problem resulting from thermistor problem

Ammi, Sidi; Rchid, Moulay; Torres, Delfim F.M. - In: Mathematics and Computers in Simulation (MATCOM) 77 (2008) 2, pp. 291-300

We analyze the spatially semidiscrete piecewise linear finite element method for a nonlocal parabolic equation … form associated with the variational formulation of the finite element method. We assume minimal regularity of the exact …

Persistent link: https://www.econbiz.de/10010749864

Parameters identification in a seawater intrusion model using adjoint sensitive method

Tber, Moulay Hicham; El Alaoui Talibi, Mohamed; Ouazar, … - In: Mathematics and Computers in Simulation (MATCOM) 77 (2008) 2, pp. 301-312

A numerical method is presented for simultaneous identification of spatially distributed hydraulic conductivity and storativity in a seawater intrusion model. The technique is based on a nonlinear optimization procedure that minimizes the squared error between observed and computed water head...

Persistent link: https://www.econbiz.de/10010750157

A NEW FINITE ELEMENT METHOD FOR PRICING OF BOND OPTIONS UNDER TIME INHOMOGENEOUS AFFINE TERM STRUCTURE MODELS OF INTEREST RATES

YANG, HONGTAO - In: International Journal of Theoretical and Applied … 10 (2007) 01, pp. 31-49

In this paper we propose a new finite element method for pricing of bond options under time inhomogeneous one …

Persistent link: https://www.econbiz.de/10004971788

Numerical integration in the DGFEM for nonlinear convection-diffusion problems

Sobotíková, Veronika; Feistauer, Miloslav - In: Mathematics and Computers in Simulation (MATCOM) 76 (2007) 1, pp. 193-197

The effect of numerical integration in the DGFEM for nonlinear convection-diffusion problems in 2D is studied. The volume and line integrals in the space semidiscretization are evaluated by numerical quadratures. The main goal is to estimate the error caused by the numerical integration and to...

Persistent link: https://www.econbiz.de/10011050537

On discrete maximum principles for nonlinear elliptic problems

Karátson, János; Korotov, Sergey; Křížek, Michal - In: Mathematics and Computers in Simulation (MATCOM) 76 (2007) 1, pp. 99-108

counterparts of the maximum principle (called discrete maximum principles, DMPs), mainly in the framework of the finite element … method, and also present our own recent results on DMPs for a class of second-order nonlinear elliptic problems with mixed …

Persistent link: https://www.econbiz.de/10011050777

Elasto-plasticity model in structural optimization of composite materials with periodic microstructures

Hoppe, Ronald H.W.; Petrova, Svetozara I. - In: Mathematics and Computers in Simulation (MATCOM) 74 (2007) 6, pp. 468-480

-plasticity model with the von Mises yield criterion. Closest-point return mapping algorithms within the incremental finite element … method are applied for the numerical solution of the problem. The latter iterative schemes are computationally effective …

Persistent link: https://www.econbiz.de/10010748979

Numerical solution of KdV–KdV systems of Boussinesq equations

Bona, J.L.; Dougalis, V.A.; Mitsotakis, D.E. - In: Mathematics and Computers in Simulation (MATCOM) 74 (2007) 2, pp. 214-228

Considered here is a Boussinesq system of equations from surface water wave theory. The particular system is one of a class of equations derived and analyzed in recent studies. After a brief review of theoretical aspects of this system, attention is turned to numerical methods for the...

Persistent link: https://www.econbiz.de/10010750134

FINITE ELEMENT SURFACE FITTING FOR BRIDGE MANAGEMENT

CHEN, XIAOJUN; KIMURA, TAKUMA - In: International Journal of Information Technology & … 05 (2006) 04, pp. 671-681

We propose a new finite element surface fitting method which can handle very large databases. This method uses finite element discretization to find an approximation of a smooth function which minimizes a sum of data residuals and second derivatives under some constraints on data. The finite...

Persistent link: https://www.econbiz.de/10004971681

The Node Capacitated Graph Partitioning Problem : A Computational Study

FERREIRA, Carlos E.; SOUZA, Cid C. de; MARTIN, Alexander; … - Center for Operations Research and Econometrics (CORE), … - 1994

In this paper we consider the problem of k-partitioning the nodes of a graph with capacity restrictions on the sum of the node weights in each subset of the partition, and the objective of minimizing the sum of the costs of the edges between the subsets of the partition. Based on a study of...

Persistent link: https://www.econbiz.de/10005043233

Preconditioning techniques for the solution of the Helmholtz equation by the finite element method

Kechroud, Riyad; Soulaimani, Azzeddine; Saad, Yousef; … - In: Mathematics and Computers in Simulation (MATCOM) 65 (2004) 4, pp. 303-321

This paper discusses 2D and 3D solutions of the harmonic Helmholtz equation by finite elements. It begins with a short survey of the absorbing and transparent boundary conditions associated with the DtN technique. The solution of the discretized system by means of a standard Galerkin or Galerkin...

Persistent link: https://www.econbiz.de/10010748827