Dr. Kai Schäfer

Research Areas

• Parameter identification for dynamical systems
• Optimization
• Bilevel optimization

Projects

1. TOPA³S - Transfer center for the optimized, Assisted, highly Automated and Autonomous Systems (01.06.2019 - 30.06.2021)

Courses (Selection)complete list

1. Übungen Einführung in die Optimierung und optimale Steuerung (Wintersemester 2020/2021)
2. Übungen Numerik 2 (Sommersemester 2020)

Theses (Selection)complete list

1. Dynamische Parameteridentifikation mittels simultaner Datenregression und Gradientenvergleich (Sally Schiewelbein)
2. Parameteridentifikation dynamischer System mittels eines Single-Shooting-Homotopieansatzes (Petr Shulpyakov)

Publications (Selection)complete list

1. M. Wiesner, K. Schäfer, P. Shulpyakov, C. Büskens.
   TOPAS Model Fitting: A Tool for Parameter Identification of Dynamical Systems.
   Operations Research Proceedings 2023, Conference paper , pp 201–207, Springer Nature Switzerland, 2025.

   DOI: doi.org/10.1007/978-3-031-58405-3_26

2. K. Schäfer.
   Decomposition Methods for Parameter Identification and Bilevel Programming.
   Dissertationsschrift, Universität Bremen, 2023.

   DOI: 10.26092/elib/2735

3. I. Mykhailiuk, K. Schäfer, C. Büskens.
   Parametric stability score and its application in optimal control.
   IFAC-PapersOnLine, 55(16):172-177, Elsevier, 2022.

   DOI: 10.1016/j.ifacol.2022.09.019

4. K. Schäfer, J. Fliege, K. Flaßkamp, C. Büskens.
   Reformulating Bilevel Problems by SQP Embedding.
   GAMM 91st Annual Meeting of the international Association of Applied Mathematics and Mechanics, online, 15.03.2021 - 19.03.2021.
   Proceedings in Applied Mathematics & Mechanics, WILEY-VCH, 2021.

   DOI: 10.1002/pamm.202000302

5. I. Mykhailiuk, K. Flaßkamp, C. Büskens, K. Schäfer.
   On the Computation of Convergence Regions for Sequential Nonlinear Programming Problems.
   GAMM 91st Annual Meeting of the international Association of Applied Mathematics and Mechanics, online, 15.03.2021 - 19.03.2021.
   Proceedings in Applied Mathematics & Mechanics, 20(1), WILEY-VCH, 2021.

   DOI: 10.1002/pamm.202000281