Applied Mathematics and Numerical Analysis Seminar  RSS

Past

Newer session pages: Next 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Newest 

18/06/2001, 11:30 — 12:30 — Room P3.10, Mathematics Building
Anne Robertson, University of Pittsburgh

A nonlinear, inelastic constitutive model for cerebral arterial tissue, with applications to intracranial aneurysms

08/06/2001, 11:30 — 12:30 — Room P3.10, Mathematics Building
C. S. Chen, University of Nevada, Las Vegas

Meshless methods for the numerical solution of partial differential equations

11/05/2001, 16:30 — 17:30 — Room P3.10, Mathematics Building
J. N. Lyness, Argonne National Laboratory

Remarks on cubature over triangles

08/05/2001, 16:30 — 17:30 — Room P3.10, Mathematics Building
J. N. Lyness, Argonne National Laboratory

Some recent work in extrapolation quadrature

24/04/2001, 12:00 — 16:00 — Room P3.10, Mathematics Building
Stig-Olof Londen, Helsinky University of Technology

On some fractional evolution equations

In this talk, we review some recent results on fractionalevolution equations of type $D^\alpha_t u+ Au = f$, $t\geq 0$,where $\alpha\in (0,2)$, $\alpha\neq 1$.

First, as a typical example, we consider the fractional Burgersequation. Next, we formulate a general result with $A$$m$-accretive. Some comments on maximal regularity follow; finallywe present an unsolved problem concerning fractional nonlinearhyperbolic equations.

20/04/2001, 15:15 — 16:15 — Room P3.10, Mathematics Building
Jacques Baranger, Laboratoire MCS, Université de Lyon I

Sur la méthode des charactéristiques en élents finis discontinus

06/04/2001, 15:00 — 16:00 — Room P4.35, Mathematics Building
Luís Nunes Vicente, Universidade de Coimbra

Métodos numéricos para optimização não linear. Aplicações edesafios

Os problemas de optimização não linear aparecem frequentementeassociados ao controlo em simulação, ao projecto em engenharia e àidentificação de parâmetros e ao ajuste de dados em experimentação.A função objectivo e as restrições apresentam, com regularidade,uma estrutura e um escalonamento próprios, associados àdiscretização de equações diferenciais.

Métodos numéricos modernos em optimização não linear, como sãopor exemplo os casos dos métodos SQP e dos métodos de regiões deconfiança, podem e devem ser adaptados para tirar partido dascaracterísticas da aplicação. Outras situações, como adegenerescência das restrições, por um lado, e a dificuldadecomputacional ou experimental em obter o valor das funções e dassuas derivadas, por outro, colocam sérios desafios aooptimizador.

08/03/2001, 12:00 — 13:00 — Room P3.10, Mathematics Building
V. Starovoitov, Lavrentiev Institute of Hydrodynamics, Novosibirsk

On the motion of rigid bodies in a viscous non-homogeneous fluid

23/02/2001, 15:00 — 16:00 — Room P3.31, Mathematics Building
Nadezhda Konyukhova, Computing Center of RAS, Moscow

On some singular BVP's for autonomous systems of nonlinear ODE's arising from hydrodynamics

16/02/2001, 15:00 — 16:00 — Room P3.31, Mathematics Building
Nadezhda Konyukhova, Computing Center of RAS, Moscow

Multiple self similar solutions of theNonlinear Wave Equation in theinflationary cosmology

11/12/2000, 11:30 — 12:30 — Room P5, Mathematics Building
, University of Liverpool

The approximate solution of fractional Differential Equations

06/12/2000, 15:00 — 16:00 — Room P3.10, Mathematics Building
Hervé Maillot, École Polytechnique, Palaiseau

Optimal Bounds and H-measures

We compute bound on effective properties of homogenizedmaterials in conduction and linear elasticity. We use $H$-measures,following the original ideas and exposition of Luc Tartar. After having recovered classical Hashin-Shtrikman simple bounds wepropose to deal with coupled bounds in conduction.

23/11/2000, 17:00 — 18:00 — Room P3.10, Mathematics Building
Hedia Chaker, LAMSIN, École Nationale d'Ingénieurs de Tunis

The high field asymptotics for degenerate semiconductors

22/11/2000, 17:00 — 18:00 — Room P3.10, Mathematics Building
Amel Ben Abda, LAMSIN, École Nationale d'Ingénieurs de Tunis

A non iterative process for cracks identification

10/11/2000, 15:30 — 16:30 — Room P3.31, Mathematics Building
António Oliveira, Universidade Nova de Lisboa

Resolução numérica de problemas de valores de fronteira singulares para equações de Emden-Fowler

08/11/2000, 17:00 — 18:00 — Room P3.10, Mathematics Building
Jalel Ben Abdallah, LAMSIN, École Nationale d'Ingénieurs de Tunis

A non destructive approach for the identification of elastic contact stresses

08/10/2000, 15:30 — 16:30 — Room P3.31, Mathematics Building
António Oliveira, Universidade Nova de Lisboa

Resolução numérica de problemas de valores de fronteira singulares para equações de Emden-Fowler

28/09/2000, 12:00 — 13:00 — Room P3.10, Mathematics Building
, Matematický ústav Univerzity Karlovy, Praha and Northern Illinois University, DeKalb

A remark on the removable singularities for the solution of the Navier-Stokes equation

13/09/2000, 15:00 — 16:00 — Room P3.10, Mathematics Building
, Universidade de Coimbra

Propagação do erro na integração numérica de ondas solitárias

Iremos estudar a propagação do erro temporal na integração numérica de ondas solitárias que são solução da equação $u_t+u_x+(1/2)u_x^2-u_{xxt}=0$, usando uma interpretação geométrica dessas ondas como equilíbrios relativos. Mostraremos que o crescimento do erro é linear para métodos que preservam quantidades invariantes do problema e quadrático para métodos não conservativos. Serão apresentados alguns resultados numéricos.

11/07/2000, 16:30 — 16:00 — Room P3.10, Mathematics Building
, Universität Freiburg

Strong solutions for non-newtonian fluids for small times

In this talk we will consider the incompressible Navier-Stokes equations, where the extra stress is replaced by an operator which is induced by a suitable potential with $p$-growth. Hereby we restrict ourselves to the three dimensional space periodic case. First of all we will consider a small trick to increase the regularity of the velocity to $L^\infty(I, W^{1,6(p-1)}(\Omega))$. With this gained regularity in mind we will attack the problem of existence of strong solutions (for small times) for small values of $p$, namely $p >7/5$.

CEMAT logo