F. Harder
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View article: Finding global solutions of some inverse optimal control problems using penalization and semismooth Newton methods
Finding global solutions of some inverse optimal control problems using penalization and semismooth Newton methods Open
We present a method to solve a special class of parameter identification problems for an elliptic optimal control problem to global optimality. The bilevel problem is reformulated via the optimal-value function of the lower-level problem. …
View article: Bilevel Optimal Control: Theory, Algorithms, and Applications
Bilevel Optimal Control: Theory, Algorithms, and Applications Open
In this chapter, we are concerned with inverse optimal control problems, i.e., optimization models which are used to identify parameters in optimal control problems from given measurements. Here, we focus on linear-quadratic optimal contro…
View article: Finding global solutions of some inverse optimal control problems using penalization and semismooth Newton methods
Finding global solutions of some inverse optimal control problems using penalization and semismooth Newton methods Open
We present a method to solve a special class of parameter identification problems for an elliptic optimal control problem to global optimality. The bilevel problem is reformulated via the optimal-value function of the lower-level problem. …
View article: M-stationarity for a class of MPCCs in Lebesgue spaces
M-stationarity for a class of MPCCs in Lebesgue spaces Open
We show that an optimality condition of M-stationarity type holds for minimizers of a class of mathematical programs with complementarity constraints (MPCCs) in Lebesgue spaces. We apply these results also to local minimizers of an inverse…
View article: The Grip Concept of Incisional Hernia Repair—Dynamic Bench Test, CT Abdomen With Valsalva and 1-Year Clinical Results
The Grip Concept of Incisional Hernia Repair—Dynamic Bench Test, CT Abdomen With Valsalva and 1-Year Clinical Results Open
Incisional hernia is a frequent consequence of major surgery. Most repairs augment the abdominal wall with artificial meshes fixed to the tissues with sutures, tacks, or glue. Pain and recurrences plague at least 10–20% of the patients aft…
View article: Reformulation of the M-stationarity conditions as a system of\n discontinuous equations and its solution by a semismooth Newton method
Reformulation of the M-stationarity conditions as a system of\n discontinuous equations and its solution by a semismooth Newton method Open
We show that the Mordukhovich-stationarity system associated with a\nmathematical program with complementarity constraints (MPCC) can be\nequivalently written as a system of discontinuous equations which can be\ntackled with a semismooth N…
View article: Increasing hernia size requires higher GRIP values for a biomechanically stable ventral hernia repair
Increasing hernia size requires higher GRIP values for a biomechanically stable ventral hernia repair Open
Background: Increasing hernia sizes lead to higher recurrence rates after ventral hernia repair. A better grip might reduce the failure rates. Material and methods: A biomechanical model delivering dynamic intermittent strain (DIS)was used…
View article: Assessing the GRIP of Ventral Hernia Repair: How to Securely Fasten DIS Classified Meshes
Assessing the GRIP of Ventral Hernia Repair: How to Securely Fasten DIS Classified Meshes Open
Recurrences are frequently observed after ventral hernia repair. Based on clinical data, the mesh-defect area ratio (MDAR) can lead to lower recurrence rates. Using dynamic intermittent strain (DIS) in a pig tissue model, MDAR can be modif…