Dr. Anton Schiela

Member of the research group:   Computational Medicine   of   Dr. Martin Weiser   at the   Konrad-Zuse-Zentrum für Informationstechnik Berlin (ZIB).


Address

Konrad-Zuse-Zentrum für
Informationstechnik Berlin (ZIB)

Numerical Analysis and Modelling, Room 4305
Takustraße 7
14195 Berlin
Germany



Phone:  +49-30-8 41 85-360
Email:   schiela@zib.de


Scientific Interests:

Function space oriented interior point methods
Optimal control with partial differential equations
State constraints
Newton methods in function space
Optimization in Function Space
Dynamical Contact Problems

Publications:

  1. C. Meyer, L. Panizzi, A. Schiela: Uniqueness criteria for solutions of the adjoint equation in state-constrained optimal control, (Accepted for publication in "Numerical Functional Analysis and Optimization") (Preprint)
  2. A. Schiela, A. Günther: An interior point algorithm with inexact step computation in function space for state constrained optimal control (Numerische Mathematik 119(2): 373-407(2011)) (Preprint)
  3. C. Klapproth, A. Schiela, P. Deuflhard: Adaptive Timestep Control for the Contact-Stabilized Newmark Method (Accepted for publication in "Numerische Mathematik") (Preprint)
  4. A. Schiela, W. Wollner: Barrier Methods for Optimal Control Problems with Convex Nonlinear Gradient Constraint (Accepted for publication in "SIAM Journal on Optimization") (Preprint)
  5. A. Schiela, M. Weiser: Barrier methods for a control problem from hyperthermia treatment planning (Accepted for publication in "Recent Advantages in Optimization and its Applications in Engineering") (Preprint)
  6. C. Klapproth, A. Schiela, P. Deuflhard: Consistency Results for the Contact-Stabilized Newmark Method (Numerische Mathematik 116(1): 65-94 (2010)) (Preprint)
  7. M. Hinze, A. Schiela: Discretization of Interior Point Methods for State Constrained Elliptic Optimal Control Problems: Optimal Error Estimates and Parameter Adjustment. (Comp. Opt. and Appl. 48(3): 581-600 (2011) ), (Preprint)
  8. A. Schiela: Barrier Methods for Optimal Control Problems with State Constraints. (SIAM J. on Optimization 20(2): 1002-1031 (2009)) , (Preprint)
  9. U. Prüfert, A. Schiela: The Minimization of a maximum-norm functional subject to an elliptic PDE and state constraints. (Z. angew. Math. Mech., 89(7): 536-551, 2009), (Preprint)
  10. A. Schiela: State constrained optimal control problems with states of low regularity. (SIAM J. on Control and Optimization 48(4): 2407-2432 (2009)) , (Preprint)
  11. R. Haller-Dintelmann, Chr. Meyer, J. Rehberg, and A. Schiela: Hölder continuity and optimal control for nonsmooth elliptic problems. (Applied Mathematics and Optimization: 60(3) 397-428 (2009)), DOI: 10.1007/s00245-009-9077-x
  12. C. Klapproth, P. Deuflhard, A. Schiela: A Perturbation Result for Dynamical Contact Problems. (Numerical Mathematics: Theory, Methods and Applications, 2(3), 237-257 (2009)) (Preprint)
  13. A. Schiela: An Extended Mathematical Framework for Barrier Methods in Function Space. ("Domain Decomposition Methods in Science and Engineering XVIII" Series: Lecture Notes in Computational Science and Engineering, Vol.70: 201-208 (2009)) (Preprint)
  14. A. Schiela: A Simplified Approach to Semismooth Newton Methods in Function Space. (SIAM J. Optimization, 19(3): 1417-1432, 2008)
  15. A. Schiela, M. Weiser: Superlinear Convergence of the Control Reduced Interior Point Method for PDE Constrained Optimization. (Comp. Opt. and Appl. 39(3): 369-393, 2008) (Preprint)
  16. M. Weiser, T. Gänzler, A. Schiela: A Control Reduced Primal Interior Point Method for PDE Constrained Optimization. (Comp. Opt. and Appl. 41(1): 127-145, 2008) (Preprint) Awarded by the COAP Best Paper Award 2008
  17. M. Weiser, A. Schiela, P. Deuflhard: Asymptotic Mesh Independence of Newton's Method Revisited. (SIAM J. Num. Anal. 42(5) : 1830-1845, 2005), (Preprint)
  18. M. Weiser, A. Schiela: Function space interior point methods for PDE constrained optimization. (PAMM 4 (1): 43-46, 2004) (Preprint)
  19. A. Schiela, F. Bornemann: Sparsing in Real Time Simulation. (Z. angew. Math. Mech. 83 : pp. 637-647 ,2003)
  20. A. Schiela, H. Olsson: Mixed-mode integration for Real-time Simulation. (Modelica Workshop 2000 Proceedings, pp. 69-75)

ZIB-Reports:

  1. ZIB Report 11-37: A. Schiela, M. Hintermüller: On the Length of the Primal-Dual Path in Moreau-Yosida-based Path-following for State Constrained Optimal Control: Analysis and Numerics
  2. ZIB Report 11-23: A. Schiela, D. Wachsmuth: Convergence Analysis of Smoothing Methods for Optimal Control of Stationary Variational Inequalities
  3. ZIB Report 10-25: S. Götschel, M. Weiser, A. Schiela: Solving Optimal Control Problems with the Kaskade 7 Finite Element Toolbox, submitted
  4. ZIB Report 07-44: A. Schiela: An Interior Point Method in Function Space for the Efficient Solution of State Constrained Optimal Control Problems, submitted
  5. ZIB Report 07-35: A. Schiela: Optimality Conditions for Convex State Constrained Optimal Control Problems with Discontinuous States.
  6. ZIB Report 06-41: A. Schiela: A continuity result for Nemyckii Operators and some applications in PDE constrained optimal control.
  7. ZIB Report 06-16: A. Schiela: Convergence of the Control Reduced Interior Point Method for PDE Constrained Optimal Control with State Constraints.


Dissertation:

A. Schiela, The Control Reduced Interior Point Method. A Function Space Oriented Algorithmic Approach. Verlag Dr. Hut, München 2006.


Presentations:

Towards inexact algorithms in functions space for the solution of optimal control problems with non-linear PDEs. München, 3/2010
Regularity Issues in State Contstrained Optimal Control. Berlin, 12/2009
Techniques for the Analysis of Path-following Methods in Function Space. Linz, 10/2009
Interior Point Methods in Function Space for Hyperthermia Treatment Planning. Leuven, 9/2009
Interior Point Methods in Function Space for Hyperthermia Treatment Planning. Chicago, 8/2009
State Constrained Optimal Control with States of low Regularity. Buenos-Aires, 7/2009
Inexact Algorithms in Function Space and Adaptivity. Berlin, 6/2009
Inexact Algorithms in Function Space and Adaptivity. Trier, 6/2009
Techniques for the Analysis of Semi-Smooth Newton Methods. Berlin, 5/2009
Techniques for the Analysis of Semi-Smooth Newton Methods. Chemnitz, 4/2009
Algorithmic Variants of Interior Point Methods in Function Space. Gdansk, 2/2009
Interior Point Methods in Function Space - Newton Path-following and Adaptivity. Oberwolfach, 1/2009
Interior Point Methods in Function Space - Newton Path-following and Adaptivity. Erlangen, 9/2008
Interior Point Methods in Function Space for State Constrained Optimal Control. Heidelberg, 8/2008
Interior Point Methods in Function Space for State Constrained Optimal Control. München, 7/2008
State Constrained Optimal Control with Discontinuous States. Berlin, 5/2008
State Constrained Optimal Control with Discontinuous States. Cottbus, 5/2008
An all-at-once approach to the analysis of optimal control problems. Bremen, 4/2008
State Constrained Optimal Control with Discontinuous States. Hamburg, 3/2008
Interior Point Methods for State Constrained Optimal Control. Jerusalem, 1/2008
Interior Point Methods for State Constrained Optimal Control. Rouen, 12/2007
The Sum-Rule and Custom made spaces for Optimality Conditions. Berlin, 11/2007
Path-Following Methods in Function Space for State Constrained Optimal Control. Zürich, 7/2007
Homotopy Methods for Optimal Control Problems with State Constraints. San Francisco, 6/2007
Barrier Methods for Optimal Control Problems with State Constraints. Berlin, 5/2007
Theoretic and Algorithmic Aspects of Newton Methods in Function Space. Berlin, 3/2007
Nichtlineare Approximationstheorie und adaptive Algorithmen. Berlin, 11/2006. Literature
The Control Reduced Interior Point Method. Dresden, 7/2006
The Control Reduced Interior Point Method. Graz, 6/2006
The Control Reduced Interior Point Method. Berlin, 3/2006
Control Reduced Interior Point Methods for PDE constrained Optimization. Tomar, 7/2005
A Function Space oriented Interior Point Optimization Algorithm for Hyperthermia Treatment Planning. Coimbra, 7/2005
Interior Point Methods in Function Space. Oberwolfach, 10/2004.


Teaching:

WS 10/11: Lecture: Optimization of Complex Systems at Universität Hamburg
SS 10: Lecture: Nonlinear Optimization
SS 09: Vorlesung: Höhere Analysis
SS 09: Vorlesung: Numerik im Funktionenraum
WS 07/08: Vorlesung: Nichtlineare Optimierung (mit Martin Weiser)
WS 05/06: Seminar: Modellierung und Simulation in Medizin und Biologie.
WS 03/04: �bung zur Vorlesung: Numerik der Optimalsteuerung. Übungsaufgaben


Curriculum Vitae

06.12.1975:   Born at Dachau, Germany
1982 - 1995:   School Education
1996 - 2002:  Technische Universität München: Studies of Technomathematik
Diploma in Technomathematik: Sparsing in Real-Time Simulation
since September 2002:    Scientific assistant at Zuse Institute Berlin (ZIB)
since February 2007:  PhD in Mathematics at FU Berlin
October 2010-March 2011:    Interim Professor at Universität Hamburg