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Operator Learning for Scientific Computing
Operator Learning for Scientific Computing
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105057
- ISBN
- 9798288818431
- DDC
- 515.35
- 서명/저자
- Operator Learning for Scientific Computing
- 발행사항
- [Sl] : California Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 257 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Stuart, Andrew M.
- 학위논문주기
- Thesis (Ph.D.)--California Institute of Technology, 2025.
- 초록/해제
- 요약This thesis develops operator learning theory and methods for use in scientific computing. Operator learning uses data to approximate maps between infinite dimensional function spaces. As such, operator learning provides a natural framework for using machine learning in applications with partial differential equations (PDEs). While operator learning architectures have successfully modeled a variety of physical phenomena in practice, the theoretical foundations underpinning these successes remain in early stages of development.The present work takes a step towards a complete understanding of operator learning and its potential use in scientific applications. The thesis begins by studying multiscale constitutive modeling, where operator learning models can serve as surrogates to accelerate simulation and aid in model discovery of physical laws. The work proposes, and theoretically and numerically analyzes, an operator learning architecture for modeling history dependence in homogenized constitutive equations. The thesis then addresses learning solutions to an elliptic PDE in the presence of discontinuities and corner interfaces in two-dimensional materials. By proving a key continuity result for the underlying PDE, a universal approximation result is obtained. In its second half, the thesis moves on from the setting of homogenized constitutive laws and gives insight to operator learning from a broader perspective. First, error analysis bounds a form of discretization error that arises in implementations of the Fourier Neural Operator (FNO). Next, a modified form of the FNO, the Fourier Neural Mapping, accommodates finite-dimensional data while retaining the underlying function space structure. This modification allows applications where the map of interest is governed by an infinite-dimensional operator with data, such as parameters or summary statistics, in the form of finite vectors. Finally, the thesis extends a theory-to-practice gap result in finite dimensions to the infinite-dimensional operator learning setting, asserting that even for classes of architectures whose model expressivity scales well with model size, their error convergence with respect to data size scales poorly. In summary, this thesis builds understanding of operator learning from several perspectives and contributes both theoretical advancements and practical methodologies that improve the applicability of operator learning models to scientific problems.
- 일반주제명
- Visualization
- 일반주제명
- Neural networks
- 일반주제명
- Computer science
- 기타저자
- California Institute of Technology Engineering and Applied Science
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105057
■006m o d
■007cr#unu||||||||
■020 ▼a9798288818431
■035 ▼a(MiAaPQ)AAI32205950
■035 ▼a(MiAaPQ)Caltech17296
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a515.35
■1001 ▼aTrautner, Margaret K.▼0(orcid)000-0001-9937-8393
■24510▼aOperator Learning for Scientific Computing
■260 ▼a[Sl]▼bCalifornia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a257 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Stuart, Andrew M.
■5021 ▼aThesis (Ph.D.)--California Institute of Technology, 2025.
■520 ▼aThis thesis develops operator learning theory and methods for use in scientific computing. Operator learning uses data to approximate maps between infinite dimensional function spaces. As such, operator learning provides a natural framework for using machine learning in applications with partial differential equations (PDEs). While operator learning architectures have successfully modeled a variety of physical phenomena in practice, the theoretical foundations underpinning these successes remain in early stages of development.The present work takes a step towards a complete understanding of operator learning and its potential use in scientific applications. The thesis begins by studying multiscale constitutive modeling, where operator learning models can serve as surrogates to accelerate simulation and aid in model discovery of physical laws. The work proposes, and theoretically and numerically analyzes, an operator learning architecture for modeling history dependence in homogenized constitutive equations. The thesis then addresses learning solutions to an elliptic PDE in the presence of discontinuities and corner interfaces in two-dimensional materials. By proving a key continuity result for the underlying PDE, a universal approximation result is obtained. In its second half, the thesis moves on from the setting of homogenized constitutive laws and gives insight to operator learning from a broader perspective. First, error analysis bounds a form of discretization error that arises in implementations of the Fourier Neural Operator (FNO). Next, a modified form of the FNO, the Fourier Neural Mapping, accommodates finite-dimensional data while retaining the underlying function space structure. This modification allows applications where the map of interest is governed by an infinite-dimensional operator with data, such as parameters or summary statistics, in the form of finite vectors. Finally, the thesis extends a theory-to-practice gap result in finite dimensions to the infinite-dimensional operator learning setting, asserting that even for classes of architectures whose model expressivity scales well with model size, their error convergence with respect to data size scales poorly. In summary, this thesis builds understanding of operator learning from several perspectives and contributes both theoretical advancements and practical methodologies that improve the applicability of operator learning models to scientific problems.
■590 ▼aSchool code: 0037.
■650 4▼aPartial differential equations
■650 4▼aVisualization
■650 4▼aNeural networks
■650 4▼aComputer science
■690 ▼a0984
■690 ▼a0800
■71020▼aCalifornia Institute of Technology▼bEngineering and Applied Science.
■7730 ▼tDissertations Abstracts International▼g87-01B.
■790 ▼a0037
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359297▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


