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dc.contributor.advisor김선영-
dc.contributor.author최혜지-
dc.creator최혜지-
dc.date.accessioned2018-09-05T08:23:48Z-
dc.date.available2018-09-05T08:23:48Z-
dc.date.issued2018-
dc.identifier.otherOAK-000000150947-
dc.identifier.urihttp://dcollection.ewha.ac.kr/common/orgView/000000150947en_US
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/245636-
dc.description.abstractBinary quadratic optimization problems (BQOPs) arise in various scientific and engineering fields, such as machine learning and signal processing. They are classified as NP-hard problems which do not have any algorithms to solve them in polynomial time. Therefore, they are solved approximately by semidefinite programming (SDP) relaxations in many cases. It was proved that a special class of quadratic optimization problems (QOPs) can obtain the exact solutions by SDP relaxations. We study the characteristics of the class of BQOPs that can be solved exactly by SDP relaxations in view of the dual theory.;이진 최적화 문제(Binary quadratic optimization problems)는 머신 러닝(machine learning)이나 신호화 과정(signal processing)과 같은 공학 분야에서 많이 나타나는 최적화 문제이다. 그러나 다항 시간(polynomial time)안에 풀 수 없는 NP-하드(NP-hard) 문제로 분류되어, 준정부호 프로그래밍(semidefinite programming)으로 완화시켜 최적화 값에 가까운 근사치를 구하는 방법을 이용해 풀이되고 있다. 그 동안의 연구에서 uniformly almost OD-nonpositive 조건을 만족하는 이차 최적화 문제(Quadratic optimization problems)는 준정부호 프로그래밍을 이용해서 풀 때 원 문제와 동일한 최적화 값을 주는 것이 증명되었다. 이 논문에서는 특별한 구조를 가지는 문제들을 더 세분화하여 라그랑지안(Lagrangian) 쌍대 문제(Dual problems)의 최적화 답(optimal solution)이 가지는 특성을 연구하였다.-
dc.description.tableofcontents1 Introduction 1 2 Preliminaries 3 2.1 Notation 3 2.2 Binary Quadratic Optimization Problems 5 2.2.1 BQOPs 5 2.2.2 Applications 7 3 SDP relaxations 11 3.1 A basic form of semide nite programming 11 3.2 Exactness of SDP relaxations 12 3.3 BQOPs with SDP relaxations . 16 4 Main Results 18 4.1 Sucient conditions for BQOPs with nonpositivity 20 4.2 Characteristics of BQOPs with nonzero row 22 5 Alternative formulation 24 5.1 Sucient conditions for BQOPs with nonpositivity 24 5.2 Characteristics of BQOPs with nonzero row 26 6 Concluding Remarks 28 References 29 국문초록 31-
dc.formatapplication/pdf-
dc.format.extent2652721 bytes-
dc.languageeng-
dc.publisher이화여자대학교 대학원-
dc.subject.ddc500-
dc.titleA Characterization of Binary Quadratic Optimization Problems-
dc.typeMaster's Thesis-
dc.format.pageii, 31 p.-
dc.contributor.examiner김선영-
dc.contributor.examiner윤정호-
dc.contributor.examiner민조홍-
dc.identifier.thesisdegreeMaster-
dc.identifier.major대학원 수학과-
dc.date.awarded2018. 8-
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