General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRT-24-0560
Direction
DRT
Thesis topic details
Category
Technological challenges
Thesis topics
Environmental monitoring of pollutant dispersion: optimal placement of mobile sensors
Contract
Thèse
Job description
Do you feel concerned by environmental pollution issues? This research will enable optimal deployment of mobile sensors for monitoring air quality in urban environments. Complex urban geometries [1] and dynamic pollutant dispersion scenarios are the scientific challenges to be met in order to better estimate local air pollution, identify sources and anticipate exposure peaks.
Our previous research has focused on the identification of pollution sources, neglecting the critical aspect of sensor placement [2]. For partial differential equation models, promising approaches based on the structural property of observability of dynamical systems have been proposed [3]. A generic two-stage approach will be studied in the thesis: the development of an infinite-dimensional variational approach for an advection-diffusion model, followed by the finite-dimensional implementation. The results of this thesis will include new sensor placement strategies, quantitative evaluation results in simulation under realistic conditions on a city district in Grenoble and/or Paris, and an in-depth understanding of how Physics-Informed Machine Learning (PIML) [4] can improve air quality monitoring in urban areas, both in 2D and 3D.
CEA-Grenoble (http://www.youtube.com/watch?v=bCIcNJOzYZY) employs over 2,500 researchers and technicians on a 64-hectare campus in the foothills. The activities of our lab focus on sensor signal fusion through studies in signal and information processing, artificial intelligence, and embedded algorithms, and brings together some twenty experienced research engineers and students from Master 2 to post-doctorate. To join our team, we are looking for a candidate with an applied mathematics profile, a taste for physical models and numerical methods, and good writing skills. You will be co-supervised by Prof. Didier Georges of GIPSA-Lab at Grenoble- Alps University (UGA)(http://scholar.google.fr/citations?user=oF1ahtcAAAAJ&hl=fr). You will also have access to scientific databases, a computing cluster with GPUs and will be trained in the use of a state-of-the-art atmospheric dispersion simulator: Parallel Micro-Swift-Spray co-developed at CEA. Remuneration will be around €2400 (gross) per month during the three years of the thesis. Join us in a unique research environment dedicated to ambitious projects that address today's major societal challenges.
[1] M. Mendil, S. Leirens, P. Armand, C. Duchenne, “Hazardous atmospheric dispersion in urban areas: A Deep Learning approach for emergency pollution forecast”, Environmental Modelling & Software, Volume 152, 2022
[2] R. Lopez-Ferber, D. Georges, S. Leirens, “Fast Estimation of Pollution Sources in Urban Areas Using a 3D LS-RBF-FD Approach”, submitted to the European Control Conference 2024
[3] D. Georges, “Optimal Location of Mobile Sensors for Environmental Monitoring”, European Control Conference (ECC), July 17-19, 2013, Zürich, Switzerland
[4] M. Raissi, P. Perdikaris, and G. E. Karniadakis. Physics-informed neural networks: A deep learning
framework for solving forward and inverse problems involving nonlinear partial differential equations. Journal of Computational physics, 378 :686–707, 2019.
University / doctoral school
Electronique, Electrotechnique, Automatique, Traitement du Signal (EEATS)
Université Grenoble Alpes
Thesis topic location
Site
Grenoble
Requester
Position start date
01/01/2024
Person to be contacted by the applicant
LEIRENS Sylvain sylvain.leirens@cea.fr
CEA
DRT/DSYS/SSCE/LSSC
Commissariat à l’énergie atomique et aux énergies alternatives
MINATEC Campus
17 rue des martyrs
38054 Grenoble Cedex
0438785806
Tutor / Responsible thesis director
GEORGES Didier didier.georges@grenoble-inp.fr
Institut National Polytechnique de Grenoble
GIPSA LAB
Domaine Universitaire - BP46
38402 Saint Martin d’Hères
04 76 82 62 36
En savoir plus
http://www.youtube.com/watch?v=bCIcNJOzYZY
http://scholar.google.fr/citations?user=oF1ahtcAAAAJ&hl=fr