MASCOT 2021 Meeting

The MASCOT NUM 2021 meeting is organized from April 28th to April 30th, 2021, by Peter Challenor (univ. of Exeter - UK), Céline Helbert (Ecole Centrale de Lyon) and Clémentine Prieur (univ. Grenoble Alpes).

The meeting was originally planed to be held in Aussois (France) at the CNRS Centre Paul Langevin. However, due to COVID-19 restriction uncertainties, it is turned to a virtual conference.

Registration is free but mandatory. It is open untill April, the 25th midnight (local time in France). Only registered people will receive the zoom links for oral presentations and poster sessions.

The meeting will focus on statistical analysis and uncertainty quantification of complex numerical models for natural world.

The first day of the annual Mascot-Num workshop is devoted to PhD students communications on topics related to the Mascot-Num network activities, i.e. sensitivity analysis,uncertainty quantification in simulation, design and modelling of computer experiments, model calibration and validation, structural reliability, optimization under uncertainty, data-driven modelling methods, etc. PhD students are invited to submit a two-page abstract using the LaTeX abstract template. Eight students will be selected by the Mascot-Num Scientific Committee for oral presentations on April 28th, 2021. The other accepted abstracts will be considered for the poster session to be held on the same day. The PDF file shall be sent by January 15th, 2021 to Please specify in your email if you want your abstract to be considered for an oral presentation or a poster. Authors will be informed whether their abstracts have been accepted in oral or poster by end of february. A prize of 1000€ will be awarded for the best oral presentation by the Mascot-Num scientific committee. A prize of 500€ will be awarded for the best poster in each of both parallel sessions by the Mascot-Num scientific committee.

Thanks to all the PhD students for the quality of their presentation (oral presentation or poster).

The best student presentation award has been granted to Clément Bénard (Safrantech/Sorbonne University). The best student poster award has been granted to Athénaïs Gautier (Bern University) and Nora Lüthen (ETH Zurich).

Congratulations to them!

The schedules in the program are given with french local time (CEST Central European Summer Time).

Program & Handouts

Day 1: April 28th (PhD students' day)

8h45-9h00 Welcome speech

Session 1 (chaired by Clémentine Prieur)

9h00-10h00 Peter Challenor
Cross-validation based adaptive sampling for Gaussian process models Challenor2020.pdf, slides_Challenor.pdf

10h00-10h30 T. T. Tran IFP Energies nouvelles
Design of Experiments in mixed continuous and discrete space MASCOT21-Tran.pdf, slides_Tran.pdf

10h30-10h45 coffee break

Session 2 (chaired by Alex Diaz)

10h45-11h15 X. Zhu ETH Zürich
Emulating the response distribution of stochastic simulators MASCOT21-Zhu.pdf, slides_Zhu.pdf

11h15-11h45 T. Gonon Ecole Centrale de Lyon
Sequential incrementation of the dimension in computer experiments MASCOT21-Gonon.pdf, slides_Gonon.pdf

11h45-12h15 H. M. Kouye INRAE - Université Grenoble Alpes
Global sensitivity analysis for models described by continuous time Markov chains with
application to epidemic models MASCOT21-Kouye.pdf, slides_Kouye.pdf

12h15-13h45 lunch break

Session 3 (chaired by Bertrand Iooss)

13h45-14h15 P. Novello CEA Cesta- Inria Saclay-CMAP
Explainable Hyperparameters Optimization using Hilbert-Schmidt Independence Criterion
MASCOT21-Novello.pdf, slides_Novello.pdf

14h15-14h45 C. Bénard Sorbonne Université, Safran Tech
Random forests: a sensitivity analysis perspective MASCOT21-Benard.pdf, slides_Benard.pdf

14h45-15h15 J. Owen Durham University
Bayesian Emulation of Complex Computer Models with Structured Partial Discontinuities
MASCOT21-Owen.pdf, slides_Owen.pdf

15h15-15h30 coffee break

Session 4 (chaired by Céline Helbert)

15h30-16h A. Cousin IFP Energies nouvelles & Ecole Polytechnique
Chance constraint optimization of a complex system: application to the fatigue design of a floating offshore wind turbine mooring system MASCOT21-Cousin.pdf, slides_Cousin.pdf

16h-16h45 Poster blitz (5 minutes per PhD student)
16h45-17h45 Question and answer poster session

Posters are dispatched in two virtual parallel sessions (see below).
For the question and answer session, each student will be hosted in a separate breakout zoom room.

Virtual room number 1 (chaired by Céline Helbert)

Short introduction

A. Gautier (Univ. Bern) - Sample-based estimation of probability density fields: a spatial extension of the logistic Gaussian process - MASCOT21_poster-Gautier.pdf

C. Sire (Mines de Saint-Etienne) - Robust inversion under uncertainty for risk analysis application to the failure of defences against flooding - MASCOT21_poster-Sire.pdf

C. Bénesse (Univ. Paul Sabatier, Toulouse) - Fairness seen as Global Sensitivity Analysis - MASCOT21_poster-Benesse.pdf

C. Gauchy (Ecole Polytechnique, CEA Paris-Saclay) - Propagation of epistemic uncertainties in seismic risk assessment - MASCOT21_poster-Gauchy.pdf

M. El Masri (ONERA and ISAE-SUPAERO, Univ. Toulouse) - Improvement of the cross-entropy method in high dimension through a one-dimensional projection without gradient estimation - MASCOT21_poster-ElMasri.pdf

B. Nony (CECI, Univ. Toulouse, CNRS, CERFACS) - Metamodelling for micro-scale atmospheric pollutant dispersion large-eddy simulation - MASCOT21_poster-Nony.pdf

M. Raeisi (Univ. Avignon) - Spatio-temporal hybrid Strauss hardcore point process and application - MASCOT21_poster-Raeisi.pdf

O. Laverny (Univ. Claude Bernard Lyon 1) - Estimation of multivariate gamma convolutions - MASCOT21_poster-Laverny.pdf

Virtual room number 2 (chaired by Clémentine Prieur)

Short introduction

B. Kerleguer (CEA, DAM, DIF, Ecole polytechnique) - Large dimension multi-fidelity surrogate model : Co-Kriging models compare to neural network approaches - MASCOT21_poster-Kerleguer.pdf

N. Lüthen (ETH Zü rich) - Sparse regression-based Poincare expansions for global sensitivity analysis - MASCOT21_poster-Luethen.pdf

P. Saves (ISAE-SUPAERO Toulouse) - High dimensional multidisciplinary design optimization with Gaussian process for eco-design aircraft - MASCOT21_poster-Saves.pdf

L. Bonnet (Univ. Paris-Saclay, ONERA/DAAA) - Post-Optimal Design using Optimal Uncertainty Quantication - MASCOT21_poster-Bonnet.pdf

S. Obakrim (Univ. Rennes 1) - Statistical downscaling of the signicant wave height - MASCOT21_poster-Obakrim.pdf

C. Travelletti (Univ. Bern) - Fast, large scale Gaussian Process-based Bayesian inversion for set estimation in Geophysics - MASCOT21_poster-Traveletti.pdf

A. Hego (Univ. Lorraine) - Sensitivity Analysis applied to a green roof dynamic model - MASCOT21_poster-Hego.pdf

17h45 -18h30 virtual meeting of the jury for the attribution of the prices

Day 2: April 29th

Session 1 (chaired by Jeremy Rohmer)

9h00-9h45 David Ginsbourger
On Gaussian Process multiple-fold cross-validation ginsbourger2020.pdf, slides_Ginsbourger.pdf

9h45-10h30 Paula Camus
Applications of data science in coastal engineering camus2020.pdf, slides_Camus.pdf

10h30-11h00 coffee break

Session 2 (chaired by Clémentine Prieur)

11h-12h30 Véronique Maume-Deschamps tutorial 1/2
On the estimation of conditional quantiles maumedeschamps2020.pdf, slides_Maume-Deschamps.pdf

12h30 And the winners are ...

12h40-14h00 lunch break

Session 3 (chaired by Peter Challenor)

14h00-14h45 James Salter
Efficient high-dimensional emulation and calibration salter2020.pdf, slides_Salter.pdf

14h45-15h30 Victoria Volodina
Bayesian Optimal Design for iterative refocussing volodina2020.pdf, slides_Volodina.pdf

15h30-16h15 François Bachoc
Spatial Blind Source Separation bachoc2020.rtf, slides_Bachoc.pdf

16h15-16h45 coffee break

Session 4 (chaired by Mireille Bossy)

16h45-17h30 Elena Di Bernardino
Lipschitz-Killing curvatures of excursion sets for two-dimensional random fields dibernardino2020.pdf, slides_DiBernardino.pdf

17h30-18h15 Gwladys Toulemonde
Space-time modelling and simulation of extreme rainfall toulemonde2020.pdf, slides_Toulemonde.pdf

18h45 end of Day 2

Day 3: April 30th

Session 1 (chaired by Christophette Blanchet-Scalliet)

8h30-10h00 Véronique Maume-Deschamps tutorial 2/2
On the estimation of conditional quantiles maumedeschamps2020.pdf, slides_Maume-Deschamps.pdf

10h00-10h30 coffee break

Session 2 (chaired by Olivier Zahm)

10h30-11h15 Pranay Seshadri
Polynomial least squares and their ridges for uncertainty quantification seshadri2020.pdf, slides_Seshadri.pdf

11h15-12h00 Julien Mairal
Sparse Coding and Trainable Algorithms for Inverse Imaging Problems mairal2020.pdf, slides_Mairal.pdf

12h15-12h30 closing words by the MASCOT NUM director, pres-gdr-mascot-2021.pdf

12h30-13h30 lunch

end of the conference

Keynote speakers

François Bachoc

Paula Camus

Peter Challenor

Elena Di Bernardino

David Ginsbourger

Julien Mairal

Véronique Maume-Deschamps

James Salter

Pranay Seshadri

Gwladys Toulemonde

Victoria Volodinia


Conference co-chairs

Organizing committee

Program committee


Registration is open untill April, the 25th midnight (local time in France). Only registered people will receive a zoom link to attend the conference.





Labex Milyon




Région ARA



Organization: Board or Céline Helbert or Clémentine Prieur