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Graph-Informed Sequential Decision Making
Graph-Informed Sequential Decision Making
Graph-Informed Sequential Decision Making

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105151
ISBN  
9798293834754
DDC  
310
저자명  
Wu, Shuang.
서명/저자  
Graph-Informed Sequential Decision Making
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
165 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
주기사항  
Advisor: Amini, Arash A.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약This dissertation studies graph-informed sequential decision making, where graphs enter the bandit problem either as data-actions, contexts, rewards-or as structure that couples decisions, observations and agents. Algorithms that leverage graph priors to accelerate learning under limited feedback are developed with comprehensive theoretical analysis in this work.Part I introduces the backgrounds of the models and concepts in both statistical sequential decision making and machine learning on graphs. Chapter 1 elucidates bandit problems and algorithms, while Chapter 2 introduces graph learning models, from graph spectral theory to graph deep learning.Part II presents the sequential decision making problems where the graph serves as data and our proposed algorithm, GNN-TS. Chapter 3 introduces two online problems in which each round presents a graph and only bandit feedback is revealed. First, in online graph selection, actions are full graphs (e.g., molecules, program graphs); the learner selects a graph and observes a noisy payoff. This framing highlights the need for graph representations and calibrated exploration at decision time. Second, in online graph classification, each input is a graph and the learner must output a multi-class label with only action-dependent bandit feedback, linking the problem to multinomial logistic bandits over graph encodings. Chapter 4 presents the first project, graph neural Thompson Sampling, which pairs graph neural encoders with Thompson sampling as exploration rules. Theoretically, its performance is characterized via an effective-dimension parameter of a graph neural tangent kernel, yielding sublinear regret of order O˜( ˜d T1/2 ).Part III presents the sequential decision making problems where the graph serves as structure and our contribution in novel algorithms and problem unification. Chapter 5 first introduces the problems that decisions are coupled by a known graph. A Laplacian-regularized linear unified view that fuses content features with structural smoothness is presented for this problem. The second bandit problem is under the multi-agent setting, with a set of wide applications in interactive systems (recommendation, advertising, personalization). The second project is detailed in Chapter 6. The Laplacian kernelized bandit algorithms are proposed by inducing a multi-user kernel and Gaussian process style posterior, with confidence bounds derived from a bias-noise decomposition and regret governed by an effective dimension. The proposals are applied into a generalized design of the gang-of-bandits problem and competitive in both preferred regime and the other regimes. Part IV introduces the future works and the conclusion on the study about sequential decision making with graph information. Chapter 7 presents the ongoing works and future investigation on this research topic. A novelty algorithm, GCN-Logistic bandit, is proposed as the ongoing project, for online graph classification with bandit feedback. A foundation work on random graph generation model in sequential decision making as well as the innovation for online recommendation with decision making on the item-user graph, are introduced as future works.
일반주제명  
Statistics
일반주제명  
Computer engineering
키워드  
Machine learning with graphs
키워드  
Sequential decision making
키워드  
Laplacian kernelized bandit algorithms
기타저자  
University of California, Los Angeles Statistics 0891
기본자료저록  
Dissertations Abstracts International. 87-03B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aWu,  Shuang.
■24510▼aGraph-Informed  Sequential  Decision  Making
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a165  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
■500    ▼aAdvisor:  Amini,  Arash  A.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aThis  dissertation  studies  graph-informed  sequential  decision  making,  where  graphs  enter  the  bandit  problem  either  as  data-actions,  contexts,  rewards-or  as  structure  that  couples  decisions,  observations  and  agents.  Algorithms  that  leverage  graph  priors  to  accelerate  learning  under  limited  feedback  are  developed  with  comprehensive  theoretical  analysis  in  this  work.Part  I  introduces  the  backgrounds  of  the  models  and  concepts  in  both  statistical  sequential  decision  making  and  machine  learning  on  graphs.  Chapter  1  elucidates  bandit  problems  and  algorithms,  while  Chapter  2  introduces  graph  learning  models,  from  graph  spectral  theory  to  graph  deep  learning.Part  II  presents  the  sequential  decision  making  problems  where  the  graph  serves  as  data  and  our  proposed  algorithm,  GNN-TS.  Chapter  3  introduces  two  online  problems  in  which  each  round  presents  a  graph  and  only  bandit  feedback  is  revealed.  First,  in  online  graph  selection,  actions  are  full  graphs  (e.g.,  molecules,  program  graphs);  the  learner  selects  a  graph  and  observes  a  noisy  payoff.  This  framing  highlights  the  need  for  graph  representations  and  calibrated  exploration  at  decision  time.  Second,  in  online  graph  classification,  each  input  is  a  graph  and  the  learner  must  output  a  multi-class  label  with  only  action-dependent  bandit  feedback,  linking  the  problem  to  multinomial  logistic  bandits  over  graph  encodings.  Chapter  4  presents  the  first  project,  graph  neural  Thompson  Sampling,  which  pairs  graph  neural  encoders  with  Thompson  sampling  as  exploration  rules.  Theoretically,  its  performance  is  characterized  via  an  effective-dimension  parameter  of  a  graph  neural  tangent  kernel,  yielding  sublinear  regret  of  order  O˜(  ˜d  T1/2  ).Part  III  presents  the  sequential  decision  making  problems  where  the  graph  serves  as  structure  and  our  contribution  in  novel  algorithms  and  problem  unification.  Chapter  5  first  introduces  the  problems  that  decisions  are  coupled  by  a  known  graph.  A  Laplacian-regularized  linear  unified  view  that  fuses  content  features  with  structural  smoothness  is  presented  for  this  problem.  The  second  bandit  problem  is  under  the  multi-agent  setting,  with  a  set  of  wide  applications  in  interactive  systems  (recommendation,  advertising,  personalization).  The  second  project  is  detailed  in  Chapter  6.  The  Laplacian  kernelized  bandit  algorithms  are  proposed  by  inducing  a  multi-user  kernel  and  Gaussian  process  style  posterior,  with  confidence  bounds  derived  from  a  bias-noise  decomposition  and  regret  governed  by  an  effective  dimension.  The  proposals  are  applied  into  a  generalized  design  of  the  gang-of-bandits  problem  and  competitive  in  both  preferred  regime  and  the  other  regimes. Part  IV  introduces  the  future  works  and  the  conclusion  on  the  study  about  sequential  decision  making  with  graph  information.  Chapter  7  presents  the  ongoing  works  and  future  investigation  on  this  research  topic.  A  novelty  algorithm,  GCN-Logistic  bandit,  is  proposed  as  the  ongoing  project,  for  online  graph  classification  with  bandit  feedback.  A  foundation  work  on  random  graph  generation  model  in  sequential  decision  making  as  well  as  the  innovation  for  online  recommendation  with  decision  making  on  the  item-user  graph,  are  introduced  as  future  works.
■590    ▼aSchool  code:  0031.
■650  4▼aStatistics
■650  4▼aComputer  engineering
■653    ▼aMachine  learning  with  graphs
■653    ▼aSequential  decision  making
■653    ▼aLaplacian  kernelized  bandit  algorithms
■690    ▼a0463
■690    ▼a0464
■690    ▼a0800
■71020▼aUniversity  of  California,  Los  Angeles▼bStatistics  0891.
■7730  ▼tDissertations  Abstracts  International▼g87-03B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359640▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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