Computation of High-Order Sensitivities of Model Responses to Model Parameters—I: Underlying Motivation and Current Methods

DG Cacuci - Energies, 2023 - mdpi.com
The mathematical/computational model of a physical system comprises parameters and
independent and dependent variables. Since the physical system is seldom known precisely …

The nth-Order Comprehensive Adjoint Sensitivity Analysis Methodology, Volume II

DG Cacuci, R Fang - 2022 - Springer
The mathematical framework of the “nth-Order Comprehensive Adjoint Sensitivity Analysis
Methodology for Linear Systems”(nth-CASAM-L) was presented in Volume 1 of this …

High-order deterministic sensitivity analysis and uncertainty quantification: review and new developments

DG Cacuci - Energies, 2021 - mdpi.com
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 …

The nth-Order Comprehensive Adjoint Sensitivity Analysis Methodology for Response-Coupled Forward/Adjoint Linear Systems (nth-CASAM-L)

DG Cacuci - The nth-Order Comprehensive Adjoint Sensitivity …, 2022 - Springer
Since linear operators admit bona fide adjoint operators, responses of models that are linear
in the state functions (ie, dependent variables) can depend simultaneously on both the …

[HTML][HTML] Third Order Adjoint Sensitivity and Uncertainty Analysis of an OECD/NEA Reactor Physics Benchmark: II. Computed Sensitivities

R Fang, DG Cacuci - American Journal of Computational Mathematics, 2020 - scirp.org
This work presents the results of the exact computation of (180) 3= 5,832,000 third-order
mixed sensitivities of the leakage response of a polyethylene-reflected plutonium (PERP) …

Fourth-order adjoint sensitivity and uncertainty analysis of an OECD/NEA reactor physics benchmark: I. Computed sensitivities

R Fang, DG Cacuci - Journal of Nuclear Engineering, 2021 - mdpi.com
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 …

[HTML][HTML] Third-order adjoint sensitivity analysis of an OECD/NEA reactor physics benchmark: I. Mathematical framework

DG Cacuci, R Fang - American Journal of Computational Mathematics, 2020 - scirp.org
This work extends to third-order previously published work on developing the adjoint
sensitivity and uncertainty analysis of the numerical model of a polyethylene-reflected …

Fourth-order comprehensive adjoint sensitivity analysis (4th-CASAM) of response-coupled linear forward/adjoint systems: I. Theoretical framework

DG Cacuci - Energies, 2021 - mdpi.com
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 …

Fourth-order adjoint sensitivity and uncertainty analysis of an OECD/NEA reactor physics benchmark: II. Computed response uncertainties

R Fang, DG Cacuci - Journal of Nuclear Engineering, 2022 - mdpi.com
This work quantifies the impact of the most important 4th-order sensitivities of the leakage
response of a polyethylene-reflected plutonium (PERP) reactor physics benchmark with …

[HTML][HTML] Fourth-order adjoint sensitivity analysis of an OECD/NEA reactor physics benchmark: II. Mathematical expressions and CPU-time comparisons for computing …

DG Cacuci, R Fang - American Journal of Computational Mathematics, 2021 - scirp.org
This work extends to fourth-order previously published work on developing the adjoint
sensitivity and uncertainty analysis of the numerical model of a polyethylene-reflected …