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Algorithms for Sparsity-Constrained Optimization Problems - On Polynomial Solvability and Approximability
Algorithms for Sparsity-Constrained Optimization Problems - On Polynomial Solvability and ...
Algorithms for Sparsity-Constrained Optimization Problems - On Polynomial Solvability and Approximability

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105120
ISBN  
9798291548028
DDC  
620
저자명  
Zhou, Dekun.
서명/저자  
Algorithms for Sparsity-Constrained Optimization Problems - On Polynomial Solvability and Approximability
발행사항  
[Sl] : The University of Wisconsin - Madison, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
161 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
주기사항  
Advisor: Del Pia, Alberto.
학위논문주기  
Thesis (Ph.D.)--The University of Wisconsin - Madison, 2025.
초록/해제  
요약The optimization problem of finding a solution with a limited number of nonzero entries, known as a sparsity-constrained optimization problem, has garnered considerable attention; however, it is generally regarded as an NP-hard problem. This thesis investigates various types of sparsity-constrained optimization problems, such as the Sparse Integer Least Square problem (SILS) and the Sparse PCA problem (SPCA). Due to their computational complexity, it is not feasible to efficiently solve these problems with arbitrary inputs. Nevertheless, we present relaxation techniques that can be solved in polynomial time, providing provable approximation bounds to the original problems. Furthermore, we demonstrate that our proposed relaxations are sufficiently tight to solve the original problems for several input classes, and hence our results shed light on the applicability of these methods in real-world scenarios. In the first part of the thesis, we study SILS. Our study involves the derivation of an l1-based semidefinite programming (SDP) relaxation, along with a randomized algorithm that can handle a broader class of binary quadratic programs with cardinality constraint. We also establish sufficient conditions under which our SDP relaxation can successfully solve SILS, which we demonstrate through the analysis of two important special cases: the feature extraction problem and the integer sparse recovery problem. In the second part, we study SPCA. We introduce a randomized algorithm based on the basic SDP relaxation of SPCA, provide provable approximation bounds, and demonstrate that the basic SDP relaxation is resilient to adversarial perturbations in certain statistical models, and so do our algorithm. In the third part, we further our investigation into SPCA. We introduce a plug-and-play framework that accelerates most existing SPCA algorithms while incurring only a negligible loss in accuracy. The framework leverages a key structural property of SPCA: when the covariance matrix is block-diagonal, the global SPCA problem splits into independent SPCA sub-problems, allowing substantial speed-ups.
일반주제명  
Engineering
일반주제명  
Systems science
키워드  
Approximation algorithm
키워드  
Mixed-integer optimization
키워드  
Randomized algorithm
키워드  
Sparse optimization
기타저자  
The University of Wisconsin - Madison Industrial Engineering
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■020    ▼a9798291548028
■035    ▼a(MiAaPQ)AAI32238220
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a620
■1001  ▼aZhou,  Dekun.
■24510▼aAlgorithms  for  Sparsity-Constrained  Optimization  Problems  -  On  Polynomial  Solvability  and  Approximability
■260    ▼a[Sl]▼bThe  University  of  Wisconsin  -  Madison▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a161  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Del  Pia,  Alberto.
■5021  ▼aThesis  (Ph.D.)--The  University  of  Wisconsin  -  Madison,  2025.
■520    ▼aThe  optimization  problem  of  finding  a  solution  with  a  limited  number  of  nonzero  entries,  known  as  a  sparsity-constrained  optimization  problem,  has  garnered  considerable  attention;  however,  it  is  generally  regarded  as  an  NP-hard  problem.  This  thesis  investigates  various  types  of  sparsity-constrained  optimization  problems,  such  as  the  Sparse  Integer  Least  Square  problem  (SILS)  and  the  Sparse  PCA  problem  (SPCA).  Due  to  their  computational  complexity,  it  is  not  feasible  to  efficiently  solve  these  problems  with  arbitrary  inputs.  Nevertheless,  we  present  relaxation  techniques  that  can  be  solved  in  polynomial  time,  providing  provable  approximation  bounds  to  the  original  problems.  Furthermore,  we  demonstrate  that  our  proposed  relaxations  are  sufficiently  tight  to  solve  the  original  problems  for  several  input  classes,  and  hence  our  results  shed  light  on  the  applicability  of  these  methods  in  real-world  scenarios.  In  the  first  part  of  the  thesis,  we  study  SILS.  Our  study  involves  the  derivation  of  an  l1-based  semidefinite  programming  (SDP)  relaxation,  along  with  a  randomized  algorithm  that  can  handle  a  broader  class  of  binary  quadratic  programs  with  cardinality  constraint.  We  also  establish  sufficient  conditions  under  which  our  SDP  relaxation  can  successfully  solve  SILS,  which  we  demonstrate  through  the  analysis  of  two  important  special  cases:  the  feature  extraction  problem  and  the  integer  sparse  recovery  problem.  In  the  second  part,  we  study  SPCA.  We  introduce  a  randomized  algorithm  based  on  the  basic  SDP  relaxation  of  SPCA,  provide  provable  approximation  bounds,  and  demonstrate  that  the  basic  SDP  relaxation  is  resilient  to  adversarial  perturbations  in  certain  statistical  models,  and  so  do  our  algorithm.  In  the  third  part,  we  further  our  investigation  into  SPCA.  We  introduce  a  plug-and-play  framework  that  accelerates  most  existing  SPCA  algorithms  while  incurring  only  a  negligible  loss  in  accuracy.  The  framework  leverages  a  key  structural  property  of  SPCA:  when  the  covariance  matrix  is  block-diagonal,  the  global  SPCA  problem  splits  into  independent  SPCA  sub-problems,  allowing  substantial  speed-ups.
■590    ▼aSchool  code:  0262.
■650  4▼aEngineering
■650  4▼aSystems  science
■653    ▼aApproximation  algorithm
■653    ▼aMixed-integer  optimization
■653    ▼aRandomized  algorithm
■653    ▼aSparse  optimization
■690    ▼a0796
■690    ▼a0537
■690    ▼a0790
■71020▼aThe  University  of  Wisconsin  -  Madison▼bIndustrial  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-02B.
■790    ▼a0262
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359445▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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