Sökning: "discontinuous Galerkin"
Visar resultat 21 - 25 av 29 avhandlingar innehållade orden discontinuous Galerkin.
21. Adaptive Finite Element Methods for Optimal Control Problems
Sammanfattning : In this thesis we study the numerical solution of optimal control problems. The problems considered consist of a systemof differential equations, the state equations, which are governed bya control variable. The goal is to determine the states and controls which minimize a given cost functional. LÄS MER
22. Adaptive Finite Element Methods for Optimal Control Problems
Sammanfattning : In this thesis we study the numerical solution of optimal control problems. The problems considered consist of a system of differential equations, the state equations, which are governed by a control variable. The goal is to determine the states and controls which minimize a given cost functional. LÄS MER
23. Uncertainty Quantification and Numerical Methods for Conservation Laws
Sammanfattning : Conservation laws with uncertain initial and boundary conditions are approximated using a generalized polynomial chaos expansion approach where the solution is represented as a generalized Fourier series of stochastic basis functions, e.g. orthogonal polynomials or wavelets. LÄS MER
24. On A Posteriori Error Estimation in the Maximum Norm
Sammanfattning : In this thesis we consider residual-based a posteriori error estimates in the maximum norm for the finite element solution of some partial differential equations. The thesis consists of three papers. The first paper concerns a pointwise a posteriori error estimate for the time dependent obstacle problem. LÄS MER
25. Finite Element Procedures for the Numerical Simulation of CRack Propagation and Bilateral Contact
Sammanfattning : This thesis concerns finite element methods for the numerical simulation of crack propagation including contact formulations for the contact between deformable bodies. The classical integral formulations for theenergy release rate at crack growth are considered and adaptive algorithms are developed. LÄS MER