École Polytechnique

A Survey on Clustered Federated Learning: Taxonomy, Analysis and Applications

As Federated Learning (FL) expands, the challenge of non-independent and identically distributed (non-IID) data becomes critical. Clustered Federated Learning (CFL) addresses this by training multiple specialized models, each representing a group of clients with similar data dist...

Characterization of tensile and torsional fatigue behaviors of additively manufactured super duplex stainless steel SAF 2507

Abstract Super duplex stainless steels (SDSSs) are well known for their good mechanical properties and corrosion resistance inherited from the dual-phase microstructure with equivalent proportion of ferrite and austenite. The development of additive manufacturing has given rise t...

Itō and Itō-Wentzell chain rule for flows of conditional laws of continuous semimartingales: an easy approach

We provide a general Itō-Wentzell formula for a random field of maps on the Wasserstein space of probability measures, defined by continuous semimartingales, and evaluated along the flow of conditional distributions of another continuous semimartingale. Our method follows standar...

Ultra-compact plasma photocathode in a hybrid wakefield accelerator

Abstract Plasma-based particle accelerators, realized by driving plasma waves with either an intense laser pulse or particle beam, offer accelerating fields orders of magnitude higher than conventional accelerators. This enables sources of highly relativistic electron beams with...

dd-RCMA-ES: CMA-ES with Projection-Based Restricted Covariance Matrix Adaptation for High-Dimensional Problems

This paper addresses the computational challenges of the covariance matrix adaptation evolution strategy (CMA-ES) in high-dimensional optimization of an objective function \(f:\mathbb{R}^{n}\to\mathbb{R}\) where \(n\gg 100\) , particularly for problems exhibiting sparse-sensitivi...

Thermohaline gradients and frontal regimes in the northwestern Tropical Atlantic

Abstract. At the edge of the Amazon River plume, stirring by the North Brazil Current (NBC) and its eddies creates sharp surface thermohaline gradients on scales of O(1–100) km. This study provides a comprehensive picture of these gradients and fronts associated with the region's...

EvolutionaryConvergence on a Dihydrofolate ReductaseMutation Drives Trimethoprim–Sulfamethoxazole Resistance in Burkholderia thailandensis

Abstract Trimethoprim–sulfamethoxazole (SXT) remains central to melioidosis eradication therapy, yet the genetic basis of resistance evolution in Burkholderia pseudomallei is not fully defined. Using Burkholderia thailandensis as a biosafe surrogate, we subjected populations to s...

Prediction of plutonium content of BWR/MOX fuel using a neural network

The Nuclear Material Balance (NMB) code is a comprehensive nuclear fuel cycle simulator developed by the Institute of Science Tokyo and the Japan Atomic Energy Agency. By modeling a fleet of reactors, fuel cycle simulators like NMB can help to optimize uranium and plutonium utili...