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Data-Driven Techniques for Materials Characterization and Intelligent Experimental Design at Advanced Scattering Facilities
Data-Driven Techniques for Materials Characterization and Intelligent Experimental Design ...
Data-Driven Techniques for Materials Characterization and Intelligent Experimental Design at Advanced Scattering Facilities

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211153054
ISBN  
9798346385042
DDC  
620.11
저자명  
Chitturi, Sathya Ranjan.
서명/저자  
Data-Driven Techniques for Materials Characterization and Intelligent Experimental Design at Advanced Scattering Facilities
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
211 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-05, Section: A.
주기사항  
Advisor: Dunne, Mike;Dionne, Jennifer.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약This dissertation addresses the need to accelerate materials discovery, particularly within the context of advanced scattering facilities. The complexity of materials discovery arises from vast design space sizes, the need to achieve multiple simultaneous property requirements, and the limitations of ab initiotheory leading to the necessity of performing time-consuming and expensive synthesis and characterization experiments. Advanced X-ray and neutron scattering facilities often play a key role in this materials design process, but now face challenges such as exploding data rates due to improvements in sources, detectors, and increased experimental complexity. This work focuses on developing methodology to enable closed-loop materials discovery at advanced scattering facilities. Specifically, data-driven techniques are introduced for the task of real-time analysis of scattering experiments and to guide materials experiments towards specific objectives.Real-time analysis, often a challenging bottleneck for closed-loop systems, is addressed through the design of methods for solving inverse scattering problems using supervised statistical learning. Emphasis is placed on using simulated data derived from physics-based forward models to aid in scattering analysis, as well as on the rational architectural design of supervised learning models to incorporate inductive biases that align with experimental data. Key frameworks introduced in this dissertation include automatic unit-cell estimation from powder X-ray di↵raction (PXRD) patterns, real-time photon assignment and contrast extraction for X-ray Photon Fluctuation Spectroscopy (XPFS), and robust Hamiltonian parameter inference from inelastic neutron scattering (INS) data.Furthermore, the dissertation presents novel methods for experimental materials design, adapting the recently proposed Bayesian algorithm execution (BAX) approach to frame materials discovery as the task of locating relevant regions of a design space aligned with specific experimental goals. This methodology o↵ers an automated way to convert complex experimental objectives into intelligent, goalaligned data acquisition strategies, allowing for addressing tasks that are impossible or impractical under current methods. The SwitchBAX data acquisition strategy, formulated in this dissertation, achieves state-of-the-art performance on datasets for TiO2nanoparticle synthesis and magnetic materials characterization, and should generally be applicable for any compound discovery task involving complex synthesis protocols, long data acquisition times, or limited sample quantities.Ultimately, this research helps enable closed-loop discovery at national facilities, o↵ering ecient solutions for accelerating materials research and discovery.
일반주제명  
Materials science
일반주제명  
Spectrum analysis
일반주제명  
Neutrons
일반주제명  
Fourier transforms
일반주제명  
Neural networks
일반주제명  
Pandemics
일반주제명  
Mathematics
일반주제명  
Point defects
일반주제명  
Large language models
일반주제명  
X-rays
일반주제명  
Parameter estimation
일반주제명  
Analytical chemistry
일반주제명  
Atomic physics
일반주제명  
Design
일반주제명  
Epidemiology
일반주제명  
Optics
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 86-05A.
전자적 위치 및 접속  
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MARC

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■1001  ▼aChitturi,  Sathya  Ranjan.
■24510▼aData-Driven  Techniques  for  Materials  Characterization  and  Intelligent  Experimental  Design  at  Advanced  Scattering  Facilities
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■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-05,  Section:  A.
■500    ▼aAdvisor:  Dunne,  Mike;Dionne,  Jennifer.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aThis  dissertation  addresses  the  need  to  accelerate  materials  discovery,  particularly  within  the  context  of  advanced  scattering  facilities.  The  complexity  of  materials  discovery  arises  from  vast  design  space  sizes,  the  need  to  achieve  multiple  simultaneous  property  requirements,  and  the  limitations  of  ab  initiotheory  leading  to  the  necessity  of  performing  time-consuming  and  expensive  synthesis  and  characterization  experiments.  Advanced  X-ray  and  neutron  scattering  facilities  often  play  a  key  role  in  this  materials  design  process,  but  now  face  challenges  such  as  exploding  data  rates  due  to  improvements  in  sources,  detectors,  and  increased  experimental  complexity.  This  work  focuses  on  developing  methodology  to  enable  closed-loop  materials  discovery  at  advanced  scattering  facilities.  Specifically,  data-driven  techniques  are  introduced  for  the  task  of  real-time  analysis  of  scattering  experiments  and  to  guide  materials  experiments  towards  specific  objectives.Real-time  analysis,  often  a  challenging  bottleneck  for  closed-loop  systems,  is  addressed  through  the  design  of  methods  for  solving  inverse  scattering  problems  using  supervised  statistical  learning.  Emphasis  is  placed  on  using  simulated  data  derived  from  physics-based  forward  models  to  aid  in  scattering  analysis,  as  well  as  on  the  rational  architectural  design  of  supervised  learning  models  to  incorporate  inductive  biases  that  align  with  experimental  data.  Key  frameworks  introduced  in  this  dissertation  include  automatic  unit-cell  estimation  from  powder  X-ray  di↵raction  (PXRD)  patterns,  real-time  photon  assignment  and  contrast  extraction  for  X-ray  Photon  Fluctuation  Spectroscopy  (XPFS),  and  robust  Hamiltonian  parameter  inference  from  inelastic  neutron  scattering  (INS)  data.Furthermore,  the  dissertation  presents  novel  methods  for  experimental  materials  design,  adapting  the  recently  proposed  Bayesian  algorithm  execution  (BAX)  approach  to  frame  materials  discovery  as  the  task  of  locating  relevant  regions  of  a  design  space  aligned  with  specific  experimental  goals.  This  methodology  o↵ers  an  automated  way  to  convert  complex  experimental  objectives  into  intelligent,  goalaligned  data  acquisition  strategies,  allowing  for  addressing  tasks  that  are  impossible  or  impractical  under  current  methods.  The  SwitchBAX  data  acquisition  strategy,  formulated  in  this  dissertation,  achieves  state-of-the-art  performance  on  datasets  for  TiO2nanoparticle  synthesis  and  magnetic  materials  characterization,  and  should  generally  be  applicable  for  any  compound  discovery  task  involving  complex  synthesis  protocols,  long  data  acquisition  times,  or  limited  sample  quantities.Ultimately,  this  research  helps  enable  closed-loop  discovery  at  national  facilities,  o↵ering  ecient  solutions  for  accelerating  materials  research  and  discovery.
■590    ▼aSchool  code:  0212.
■650  4▼aMaterials  science
■650  4▼aSpectrum  analysis
■650  4▼aNeutrons
■650  4▼aFourier  transforms
■650  4▼aNeural  networks
■650  4▼aPandemics
■650  4▼aMathematics
■650  4▼aPoint  defects
■650  4▼aLarge  language  models
■650  4▼aX-rays
■650  4▼aParameter  estimation
■650  4▼aAnalytical  chemistry
■650  4▼aAtomic  physics
■650  4▼aDesign
■650  4▼aEpidemiology
■650  4▼aOptics
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■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g86-05A.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164844▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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