Results 1 to 10 of about 4,102 (88)

Fourth-Order Adjoint Sensitivity and Uncertainty Analysis of an OECD/NEA Reactor Physics Benchmark: I. Computed Sensitivities

open access: yesJournal of Nuclear Engineering, 2021
This work extends the investigation of higher-order sensitivity and uncertainty analysis from 3rd-order to 4th-order for a polyethylene-reflected plutonium (PERP) OECD/NEA reactor physics benchmark.
Ruixian Fang, Dan Gabriel Cacuci
doaj   +3 more sources

Fourth-Order Comprehensive Adjoint Sensitivity Analysis (4th-CASAM) of Response-Coupled Linear Forward/Adjoint Systems: I. Theoretical Framework

open access: yesEnergies, 2021
The most general quantities of interest (called “responses”) produced by the computational model of a linear physical system can depend on both the forward and adjoint state functions that describe the respective system.
Dan Gabriel Cacuci
doaj   +3 more sources

Towards Overcoming the Curse of Dimensionality: The Third-Order Adjoint Method for Sensitivity Analysis of Response-Coupled Linear Forward/Adjoint Systems, with Applications to Uncertainty Quantification and Predictive Modeling

open access: yesEnergies, 2019
This work presents the Third-Order Adjoint Sensitivity Analysis Methodology (3rd-ASAM) for response-coupled forward and adjoint linear systems.
Dan Gabriel Cacuci
doaj   +3 more sources

TOWARDS OVERCOMING THE CURSE OF DIMENSIONALITY IN PREDICTIVE MODELLING AND UNCERTAINTY QUANTIFICATION [PDF]

open access: yesEPJ Web of Conferences, 2021
This invited presentation summarizes new methodologies developed by the author for performing high-order sensitivity analysis, uncertainty quantification and predictive modeling.
Cacuci Dan G.
doaj   +3 more sources

High-Order Deterministic Sensitivity Analysis and Uncertainty Quantification: Review and New Developments

open access: yesEnergies, 2021
This work reviews the state-of-the-art methodologies for the deterministic sensitivity analysis of nonlinear systems and deterministic quantification of uncertainties induced in model responses by uncertainties in the model parameters.
Dan Gabriel Cacuci
doaj   +1 more source

Illustrative Application of the nth-Order Comprehensive Adjoint Sensitivity Analysis Methodology for Nonlinear Systems to the Nordheim–Fuchs Reactor Dynamics/Safety Model

open access: yesJournal of Nuclear Engineering, 2022
The application of the recently developed “nth-order comprehensive sensitivity analysis methodology for nonlinear systems” (abbreviated as “nth-CASAM-N”) has been previously illustrated on paradigm nonlinear space-dependent problems.
Dan Gabriel Cacuci
doaj   +1 more source

Measurement network design including traveltime determinations to minimize model prediction uncertainty [PDF]

open access: yes, 2008
Traveltime determinations have found increasing application in the characterization of groundwater systems. No algorithms are available, however, to optimally design sampling strategies including this information type.
Janssen, G.M.C.M.   +2 more
core   +1 more source

Quantification of airfoil geometry-induced aerodynamic uncertainties - comparison of approaches [PDF]

open access: yes, 2016
Uncertainty quantification in aerodynamic simulations calls for efficient numerical methods since it is computationally expensive, especially for the uncertainties caused by random geometry variations which involve a large number of variables. This paper
Litvinenko, Alexander   +3 more
core   +2 more sources

Development of the adjoint of GEOS-Chem [PDF]

open access: yes, 2006
We present the adjoint of the global chemical transport model GEOS-Chem, focusing on the chemical and thermodynamic relationships between sulfate – ammonium – nitrate aerosols and their gas-phase precursors.
Henze, D. K., Seinfeld, J. H.
core   +2 more sources

Method for Computationally Efficient Design of Dielectric Laser Accelerators [PDF]

open access: yes, 2017
Dielectric microstructures have generated much interest in recent years as a means of accelerating charged particles when powered by solid state lasers.
England, R. Joel   +4 more
core   +3 more sources

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