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Learning with Graph Structured Data
Learning with Graph Structured Data
Learning with Graph Structured Data

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105539
ISBN  
9798263395186
DDC  
516.35
저자명  
Singh, Rahul.
서명/저자  
Learning with Graph Structured Data
발행사항  
[Sl] : Georgia Institute of Technology, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
117 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: A.
주기사항  
Advisor: Chen, Yongxin.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2023.
초록/해제  
요약Graphs provide a natural way to represent information in structured form. A graph is a data structure describing a collection of entities, represented as nodes, and their pairwise relationships, represented as edges. When the entities in a graph are random variables, its gives rise to probabilistic graphical models (PGMs). PGMs provide a natural framework for the representation of complex systems and offer straightforward abstraction for the interactions within the systems. Reasoning with help of probabilistic graphical models allows us to answer inference queries with uncertainty following the framework of probability theory. General inference tasks can be to compute marginal probabilities, conditional probabilities of states of a system. Apart from the inference tasks in PGMs, another fundamental problem is learning the parameters of a candidate graphical model by extracting information from empirical observations.Traditional methods in PGMs are concerned with the structured data generated with known individual's association. When the structured data is generated by a large population of individuals with unknown individual's association, it gives rise to collective graphical models (CGMs). Learning and inference from large population is a difficult task and the lack of individual measurement makes it even more challenging. We address the inference problems from aggregate data via its connections to multimarginal optimal transport theory and propose convergent algorithms for aggregate inference and learning. We further specialize our methods to simple yet popular hidden Markov models (HMMs) and Gaussian HMMs.Another important problem with graph structured data is learning graph embeddings which has a vast variety of application domains including bioinformatics, social networks and recommendation systems. The standard deep learning techniques such as recurrent neural networks (RNNs) or convolutional neural networks (CNNs) cannot generalize to arbitrary graph structure. Recently, graph neural networks (GNNs) have been proposed to alleviate the limitations, however, in its current state it is far from being mature in both theory and applications. The existing GNNs methods cannot be directly applied to signed graphs (with positive as well as negative edges) due to computational irregularities. To this end, we propose spectral signed graph neural network designs for learning node embeddings for signed graphs. Furthermore, we introduce signed Magnetic Laplacian for spectral analysis of directed signed graphs and use it to propose new spectral GNN designs applicable to directed signed graphs.
일반주제명  
Polytopes
일반주제명  
Probability
일반주제명  
Fourier transforms
일반주제명  
Graph representations
일반주제명  
Signal processing
일반주제명  
Neural networks
일반주제명  
Electrical engineering
일반주제명  
Web studies
일반주제명  
Mathematics
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05A.
전자적 위치 및 접속  
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MARC

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■1001  ▼aSingh,  Rahul.
■24510▼aLearning  with  Graph  Structured  Data
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a117  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  A.
■500    ▼aAdvisor:  Chen,  Yongxin.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2023.
■520    ▼aGraphs  provide  a  natural  way  to  represent  information  in  structured  form.  A  graph  is  a  data  structure  describing  a  collection  of  entities,  represented  as  nodes,  and  their  pairwise  relationships,  represented  as  edges.  When  the  entities  in  a  graph  are  random  variables,  its  gives  rise  to  probabilistic  graphical  models  (PGMs).  PGMs  provide  a  natural  framework  for  the  representation  of  complex  systems  and  offer  straightforward  abstraction  for  the  interactions  within  the  systems.  Reasoning  with  help  of  probabilistic  graphical  models  allows  us  to  answer  inference  queries  with  uncertainty  following  the  framework  of  probability  theory.  General  inference  tasks  can  be  to  compute  marginal  probabilities,  conditional  probabilities  of  states  of  a  system.  Apart  from  the  inference  tasks  in  PGMs,  another  fundamental  problem  is  learning  the  parameters  of  a  candidate  graphical  model  by  extracting  information  from  empirical  observations.Traditional  methods  in  PGMs  are  concerned  with  the  structured  data  generated  with  known  individual's  association.  When  the  structured  data  is  generated  by  a  large  population  of  individuals  with  unknown  individual's  association,  it  gives  rise  to  collective  graphical  models  (CGMs).  Learning  and  inference  from  large  population  is  a  difficult  task  and  the  lack  of  individual  measurement  makes  it  even  more  challenging.  We  address  the  inference  problems  from  aggregate  data  via  its  connections  to  multimarginal  optimal  transport  theory  and  propose  convergent  algorithms  for  aggregate  inference  and  learning.  We  further  specialize  our  methods  to  simple  yet  popular  hidden  Markov  models  (HMMs)  and  Gaussian  HMMs.Another  important  problem  with  graph  structured  data  is  learning  graph  embeddings  which  has  a  vast  variety  of  application  domains  including  bioinformatics,  social  networks  and  recommendation  systems.  The  standard  deep  learning  techniques  such  as  recurrent  neural  networks  (RNNs)  or  convolutional  neural  networks  (CNNs)  cannot  generalize  to  arbitrary  graph  structure.  Recently,  graph  neural  networks  (GNNs)  have  been  proposed  to  alleviate  the  limitations,  however,  in  its  current  state  it  is  far  from  being  mature  in  both  theory  and  applications.  The  existing  GNNs  methods  cannot  be  directly  applied  to  signed  graphs  (with  positive  as  well  as  negative  edges)  due  to  computational  irregularities.  To  this  end,  we  propose  spectral  signed  graph  neural  network  designs  for  learning  node  embeddings  for  signed  graphs.  Furthermore,  we  introduce  signed  Magnetic  Laplacian  for  spectral  analysis  of  directed  signed  graphs  and  use  it  to  propose  new  spectral  GNN  designs  applicable  to  directed  signed  graphs.
■590    ▼aSchool  code:  0078.
■650  4▼aPolytopes
■650  4▼aProbability
■650  4▼aFourier  transforms
■650  4▼aGraph  representations
■650  4▼aSignal  processing
■650  4▼aNeural  networks
■650  4▼aElectrical  engineering
■650  4▼aWeb  studies
■650  4▼aMathematics
■690    ▼a0800
■690    ▼a0544
■690    ▼a0646
■690    ▼a0405
■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05A.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360514▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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