Français Anglais
Accueil Annuaire Plan du site
Accueil > Evenements > Séminaires
Séminaire d'équipe(s) ParSys
Resilient PDE solving approaches for exascale computing
Paul Mycek

29 May 2018, 10h30
Salle/Bat : 465/PCRI-N
Contact :

Activités de recherche : Calcul à haute performance

Résumé :
Resilience represents one of the many challenges to be anticipated and addressed before viable exascale systems can emerge. In this context, I will present an approach to tackle resilience for the solving of deterministic and stochastic partial differential equations (PDEs). The approach is based on a domain decomposition framework, together with a sampling and optimization approach. In particular, the occurence of silent data corruption (SDC), modeled by random bit flips in the 64-bits representation of double precision variables, is overcome by means of robust regression techniques involving l1-minimization. In the case of an elliptic PDE with random coefficients, the stochastic quantities are approximated by a polynomial chaos (PC) surrogate and we then resort to a hybrid approach involving both sampling and Galerkin projection. Finally, I will present discrete a priori bounds on the solution of elliptic PDEs, used to enhance the resilient capabilities of the approach. This a priori knowledge is used to check the admissibility of local PDE solutions and to filter out corrupted data, thus making the subsequent regression more robust.

Pour en savoir plus : https://parsys.lri.fr/seminar.html
Séminaires
Distributed decision and verification by mobile ag
Algorithmique distribuée
Tuesday 22 January 2019 - 10h30
Salle : 465 - PCRI-N
Evangelos Bampas .............................................

Redundancy in Distributed Proofs
Algorithmique distribuée
Tuesday 04 December 2018 - 00h00
Salle : 465 - PCRI-N
Ami Paz .............................................

Some recent results on the integer linear programm
Théorie des graphes
Friday 30 November 2018 - 00h00
Salle : 445 - PCRI-N
Hung Nguyen .............................................

Scalable and exhaustive screening of metabolic fun
Wednesday 28 November 2018 - 11h00
Salle : 465 - PCRI-N
Clémence Frioux .............................................

De la sociologie *avec* des algorithmes à la socio
Friday 09 November 2018 - 14h30
Salle : 445 - PCRI-N
Christpohe Prieur .............................................