Updated on 2024/10/29

Information

 

写真a

 
THEMELIS ANDREAS
 
Organization
Faculty of Information Science and Electrical Engineering Department of Electrical Engineering Associate Professor
School of Engineering Department of Electrical Engineering and Computer Science（Concurrent）
Graduate School of Information Science and Electrical Engineering Department of Electrical and Electronic Engineering（Concurrent）
Joint Graduate School of Mathematics for Innovation （Concurrent）
Title
Associate Professor
Contact information
メールアドレス
Tel
0928023718
Profile
The increase of computing capability and the development of powerful (micro)processors that we have witnessed in the last years has motivated engineers to design more sophisticated ad-hoc control strategies based on "Optimization". The importance of this science is dictated by the fact that virtually any engineering problem is (or can be reduced to) a functional minimization. For instance, finding the "best" route in path planning amounts to finding the one that minimizes a cost (function), which is the contribution of factors such as distance, time, fuel consumption, and so on. The main challenge is to find a suitable balance between convergence speed, low computational requirements, and range of problems that can be solved. Our group aims at developing efficient algorithms to be employed in a wide area of engineering applications, including, but not limited to, control and signal processing.
External link

Degree

  • PhD

Research History

  • KU Leuven (Postdoctoral researcher)

Research Interests・Research Keywords

  • Research theme：The increase of computing capability and the development of powerful (micro)processors that we have witnessed in the last years has motivated engineers to design more sophisticated ad-hoc control strategies based on "Optimization". The importance of this science is dictated by the fact that virtually any engineering problem is (or can be reduced to) a functional minimization. For instance, finding the "best" route in path planning amounts to finding the one that minimizes a cost (function), which is the contribution of factors such as distance, time, fuel consumption, and so on. The main challenge is to find a suitable balance between convergence speed, low computational requirements, and range of problems that can be solved. Our group aims at developing efficient algorithms to be employed in a wide area of engineering applications, including, but not limited to, control and signal processing.

    Keyword：Optimization algorithms for engineering

    Research period： 2021.1 - 2021.6

Papers

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Presentations

  • Adaptive proximal gradient methods for convex bilevel optimization Invited International conference

    Andreas Themelis, Puya Latafat, Silvia Villa, Panagiotis Patrinos

    Control & Optimisation (ContrOpt) Pisa 2023  2023.5 

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    Event date： 2023.5

    Language：English   Presentation type：Oral presentation (general)  

    Country：Italy  

    Other Link： https://contropt2023.ec.unipi.it

    Repository Public URL： https://hdl.handle.net/2324/6790346

  • Inertia and relative smoothness in nonconvex minimization: a case study on the forward-reflected-backward algorithm Invited International conference

    Andreas Themelis, @Ziyuan Wang, #Hongjia Ou, Xianfu Wang

    2022 International Workshop on Continuous Optimization  2022.12 

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    Event date： 2022.12

    Language：English   Presentation type：Symposium, workshop panel (public)  

    Country：Japan  

    Other Link： http://www.opt.c.titech.ac.jp/DecemberWorkshop/

    Repository Public URL： https://hdl.handle.net/2324/6790347

  • Splitting algorithms for nonconvex optimization: unified analysis and Newton-type acceleration Invited International conference

    Andreas Themelis

    Northwestern Polytechnical University Optimization Seminar  2022.10 

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    Event date： 2022.10

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：China  

    Repository Public URL： https://hdl.handle.net/2324/6790348

  • Efficient lightweight solvers for real-time embedded nonlinear MPC Invited

    Andreas Themelis

    60th SICE Annual Conference 2021  2021.9 

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    Event date： 2021.9

    Language：English   Presentation type：Oral presentation (general)  

    Country：Japan  

    Other Link： https://www.imi.kyushu-u.ac.jp/wp-content/uploads/2022/07/mil_84.pdf

  • Optimization for real-time control with limited resources Invited International conference

    Andreas Themelis

    6th IFAC Conference on Engine and Powertrain Control, Simulation and Modeling  2021.8 

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    Event date： 2021.8

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：Japan  

    Other Link： https://ifac.papercept.net/conferences/conferences/ECOSM21/program/ECOSM21_ContentListWeb_1.html#suts1

    Repository Public URL： https://hdl.handle.net/2324/6790350

  • Bregman proximal algorithms for composite and finite-sum nonconvex minimization problems Invited International conference

    Andreas Themelis, Puya Latafat, Masoud Ahookhosh, Panagiotis Patrinos

    SIAM Conference on Optimization (OP21)  2021.7 

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    Event date： 2021.7

    Language：English   Presentation type：Symposium, workshop panel (public)  

    Other Link： https://meetings.siam.org/sess/dsp_programsess.cfm?SESSIONCODE=72026

    Repository Public URL： https://hdl.handle.net/2324/6790349

  • A universal majorization-minimization framework for the convergence analysis of nonconvex proximal algorithms Invited International conference

    Andreas Themelis, Panagiotis Patrinos

    6th International Conference on Continuous Optimization  2019.8 

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    Event date： 2021.6

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：Germany  

  • Proximal envelopes Invited International conference

    Andreas Themelis, Panagiotis Patrinos

    17th IEEE European Control Conference  2018.6 

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    Event date： 2021.6

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：Cyprus  

  • A simple and efficient algorithm for Nonlinear MPC International conference

    Lorenzo Stella, Andreas Themelis, Pantelis Sopasakis, Panagiotis Patrinos

    56th IEEE Conference on Decision and Control  2017.12 

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Country：Australia  

  • Accelerated Douglas-Rachford splitting and ADMM for structured nonconvex optimization Invited International conference

    Panagiotis Patrinos, Andreas Themelis

    CMO-BIRS Workshop on Splitting Algorithms, Modern Operator Theory and Applications  2017.9 

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    Event date： 2021.6

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：Mexico  

  • Newton-type proximal algorithms for nonconvex optimization Invited International conference

    Andreas Themelis

    LCCC focus period on large scale and distributed optimization  2017.6 

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    Event date： 2021.6

    Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

    Country：Sweden  

  • Newton-type operator splitting algorithms International conference

    Andreas Themelis, Puya Latafat, Panagiotis Patrinos

    4th European Conference on Computational Optimization  2016.9 

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Country：Belgium  

  • A variable metric Stochastic Gradient method for large scale optimization International conference

    Andreas Themelis, Silvia Villa, Panagiotis Patrinos, Alberto Bemporad

    28th European Conference on Operational Research  2016.7 

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Country：Poland  

  • Stochastic Gradient Methods for Stochastic Model Predictive Control Invited International conference

    Andreas Themelis, Silvia Villa, Alberto Bemporad, Panagiotis Patrinos

    15th IEEE European Control Conference  2016.6 

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Country：Denmark  

  • A globally and superlinearly convergent algorithm for finding fixed points of nonexpansive operators Invited International conference

    Andreas Themelis, Puya Latafat, Panagiotis Patrinos

    50th Anniversary of the Center for Operations Research and Econometrics  2016.5 

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    Event date： 2021.6

    Language：English   Presentation type：Oral presentation (general)  

    Country：Belgium  

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Academic Activities

  • Screening of academic papers

    Role(s)： Peer review

    2022

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：6

    Proceedings of International Conference Number of peer-reviewed papers：2

  • Screening of academic papers

    Role(s)： Peer review

    2021

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：7

  • Screening of academic papers

    Role(s)： Peer review

    2020

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：5

    Proceedings of International Conference Number of peer-reviewed papers：3

  • Screening of academic papers

    Role(s)： Peer review

    2019

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：2

  • Screening of academic papers

    Role(s)： Peer review

    2018

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

  • Screening of academic papers

    Role(s)： Peer review

    2017

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    Type：Peer review 

    Number of peer-reviewed articles in foreign language journals：1

    Proceedings of International Conference Number of peer-reviewed papers：1

  • Screening of academic papers

    Role(s)： Peer review

    2016

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    Type：Peer review 

    Proceedings of International Conference Number of peer-reviewed papers：1

  • Screening of academic papers

    Role(s)： Peer review

    2015

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    Type：Peer review 

    Proceedings of International Conference Number of peer-reviewed papers：2

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Research Projects

  • The main objective of the project is to develop learning-based techniques for devising ad-hoc tuning-free optimization algorithms for convex and nonconvex optimization problems. A novel universal framework will be developed, which will serve as a solid theoretical ground for the development of new learning paradigms to train optimization methods subject to certificates of (speed of) conver-gence and quality of output solution.

    2021.6

    共同研究

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    Authorship：Coinvestigator(s)  Grant type：Other funds from industry-academia collaboration

  • The project is concerned with optimization algorithms for engineering, in compliance with the application challenges: efficiency, limited power of microprocessors, and nonconvexity of the problems. The final goal is to provide efficient open‑source multi‑purpose software with theoretical guarantees.

    Grant number：21K17710  2021 - 2023

    日本学術振興会  科学研究費助成事業  若手研究

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    Authorship：Principal investigator  Grant type：Scientific research funding

Class subject

  • プログラミング演習Ⅲ

    2023.12 - 2024.2   Winter quarter

  • Presentations in EEE Studies(Group3)

    2023.10 - 2024.3   Second semester

  • 電気電子工学研究調査(第3ｸﾞﾙｰﾌﾟ)

    2023.10 - 2024.3   Second semester

  • (IUPE)Mathematics for EECS

    2023.4 - 2023.6   Spring quarter

  • プログラミング演習Ⅲ

    2022.12 - 2023.2   Winter quarter

  • (IUPE)Mathematics for EECS

    2022.4 - 2022.6   Spring quarter

  • (IUPE)Mathematics for EECS

    2021.4 - 2021.6   Spring quarter

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Travel Abroad

  • 2023.8

    Staying countory name 1：Japan   Staying institution name 1：10th International Congress on Industrial and Applied Mathematics

  • 2023.8

    Staying countory name 1：China   Staying institution name 1：Chongqing Normal University

  • 2023.5

    Staying countory name 1：Italy   Staying institution name 1：University of Pisa

  • 2022.11 - 2022.12

    Staying countory name 1：Japan   Staying institution name 1：Tokyo Institute of Technology

  • 2019.6

    Staying countory name 1：Italy   Staying institution name 1：IMT School for Advanced Studies Lucca

  • 2018.8

    Staying countory name 1：Germany   Staying institution name 1：6th International Conference on Continuous Optimization

  • 2018.6

    Staying countory name 1：Cyprus   Staying institution name 1：17th IEEE European Control Conference

  • 2017.12

    Staying countory name 1：Australia   Staying institution name 1：56th IEEE International Conference on Decision and Control

  • 2017.6

    Staying countory name 1：Sweden   Staying institution name 1：Department of Automatic Control

  • 2016.7

    Staying countory name 1：Poland   Staying institution name 1：28th European Conference on Operational Research

  • 2016.6

    Staying countory name 1：Denmark   Staying institution name 1：15th IEEE European Control Conference

  • 2015.10 - 2016.4

    Staying countory name 1：Belgium   Staying institution name 1：KU Leuven

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