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

Maximum Independent Set in H-free graphs
Théorie des graphes
Friday 05 October 2018 - 14h30
Salle : 445 - PCRI-N
Edouard BONNET .............................................

A Family of Tractable Graph Distances
Gestion de données du Web
Wednesday 04 July 2018 - 10h30
Salle : 465 - PCRI-N
Stratis Ioannidis .............................................

Binary pattern of length greater than 14 are abeli
Combinatoire
Friday 29 June 2018 - 14h30
Salle : 445 - PCRI-N
Matthieu Rosenfeld .............................................

Distributionally Robust Optimization with Principa
Optimisation combinatoire et stochastique
Friday 29 June 2018 - 11h00
Salle : 455 - PCRI-N
Dr. Jianqiang Cheng .............................................