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タイトル: Application of dynamic mode decomposition to exponential experiment for spatial decay constant determination
著者: Yamamoto, Toshihiro  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-6709-0432 (unconfirmed)
Sakamoto, Hiroki
著者名の別形: 山本, 俊弘
キーワード: Gamma-eigenvalue
Exponential experiment
Higher harmonics
Dynamic mode decomposition
Bootstrapping
発行日: Nov-2021
出版者: Elsevier BV
誌名: Annals of Nuclear Energy
巻: 162
論文番号: 108506
抄録: When measuring the fundamental mode decay constant γ in an exponential experiment, it is difficult to extract the fundamental mode from a measured neutron flux distribution that is contaminated by many higher harmonics. Dynamic mode decomposition (DMD), which is intended for time-varying system analyses, is applied to the eigendecomposition of a three-dimensional flux distribution by viewing a series of two-dimensional flux profiles at horizontal planes as snapshots of a time-varying system. Through DMD, a fundamental mode can be extracted accurately from limited measured data that are largely contaminated by higher harmonics. The DMD yields a biased γ-eigenvalue if the statistical fluctuation of measured data is considered, and the bias is adjusted through a numerical simulation of an exponential experiment. Bootstrapping is employed for resampling the measured data from an exponential experiment. Ultimately, several measurements for an exponential experiment are closely simulated by bootstrap samples from a limited number of measurements.
著作権等: © 2021. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International license.
The full-text file will be made open to the public on 1 November 2023 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/267523
DOI(出版社版): 10.1016/j.anucene.2021.108506
出現コレクション:学術雑誌掲載論文等

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