Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning
Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2016.
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
| Published: |
Massachusetts Institute of Technology
2017
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/1721.1/106691 |
| _version_ | 1826213660866904064 |
|---|---|
| author | Fugleberg, Eric N. (Eric Nels) |
| author2 | Michael Golay and Robert Youngblood. |
| author_facet | Michael Golay and Robert Youngblood. Fugleberg, Eric N. (Eric Nels) |
| author_sort | Fugleberg, Eric N. (Eric Nels) |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2016. |
| first_indexed | 2024-09-23T15:52:48Z |
| format | Thesis |
| id | mit-1721.1/106691 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T15:52:48Z |
| publishDate | 2017 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1066912019-04-10T08:24:11Z Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning Fugleberg, Eric N. (Eric Nels) Michael Golay and Robert Youngblood. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Massachusetts Institute of Technology. Department of Nuclear Science and Engineering. Nuclear Science and Engineering. Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2016. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Cataloged from student-submitted PDF version of thesis. Includes bibliographical references (pages 85-87). Inverse problems and inverse uncertainty quantification (UQ) are challenging issues when dealing with complex and highly non-linear functions. Methods have been developed to decrease the computational burden by using the Gaussian Process (GP) emulator model framework to approximate the input-output relation of a deterministic computer code. The GP emulator can then be used in place of the computer code to perform Bayesian calibration techniques to determine uncertain parameter distribution. The performance of a GP emulator is largely dependent on the quality of the points in its training set; the best emulator exactly replicates the output of the computer code. The uncertain parameter posterior sample space is not known a priori, resulting in GP training sets covering as much of the prior sample space as possible in hopes of covering the posterior space well enough. This work improves the performance of the simple GP emulator using an active learning methodology to select additional training points which cover the posterior sample space of the unknown parameters. Furthermore, the effect of the covariance function on the performance of the GP is investigated with recommendations made for future GP emulator applications. by Eric Nels Fugleberg. S.M. 2017-01-30T18:50:50Z 2017-01-30T18:50:50Z 2016 2016 Thesis http://hdl.handle.net/1721.1/106691 969776132 eng MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582 87 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Nuclear Science and Engineering. Fugleberg, Eric N. (Eric Nels) Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning |
| title | Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning |
| title_full | Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning |
| title_fullStr | Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning |
| title_full_unstemmed | Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning |
| title_short | Uncertainty quantification and calibration in nuclear safety codes using Gaussian process active learning |
| title_sort | uncertainty quantification and calibration in nuclear safety codes using gaussian process active learning |
| topic | Nuclear Science and Engineering. |
| url | http://hdl.handle.net/1721.1/106691 |
| work_keys_str_mv | AT fuglebergericnericnels uncertaintyquantificationandcalibrationinnuclearsafetycodesusinggaussianprocessactivelearning |