Roger Georges Ghanem

An extended polynomial chaos expansion for PDF characterization and variation with aleatory and epistemic uncertainties

Computer Methods in Applied Mechanics and Engineering · 2021 · 55 citations

Probabilistic learning on manifolds constrained by nonlinear partial differential equations for small datasets

Computer Methods in Applied Mechanics and Engineering · 2021 · 38 citations

Probabilistic learning and updating of a digital twin for composite material systems

International Journal for Numerical Methods in Engineering · 2020 · 37 citations

Summary This article presents an approach for characterizing and estimating statistical dependence between a large number of observables in a composite material system. Conditional regression is carried out using the estimated joint density function, permitting a systematic exploration of interdependence between fine scale and coarse observables that can be used for both prognosis and design of complex material systems. An example demonstrates the integration of experimental data with a computat…

Damage detection and localization in sealed spent nuclear fuel dry storage canisters using multi-task machine learning classifiers

Reliability Engineering & System Safety · 2024-08-17 · 18 citations

Spent nuclear fuel (SNF) assemblies (FAs), composed of bundled radioactive fuel rods, are stored in stainless-steel canisters as an interim dry storage option until permanent storage solutions are available. Accidental damage to these canisters may occur during handling or transportation events. If such events occur, it is necessary to assess the integrity of FAs before long-term storage. Since the canisters are sealed shut and can only be opened in special handling facilities, non-destructive e…

Joint probabilistic modelling and sampling from small data via probabilistic learning on manifolds and decoupled multi-probability density evolution method

Probabilistic Engineering Mechanics · 2025-01-01 · 8 citations