Stephan Westphal

According to our database, Stephan Westphal authored at least 37 papers between 2006 and 2022.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2022

Oblique decision tree induction by cross-entropy optimization based on the von Mises-Fisher distribution.

Ferdinand Bollwein, Stephan Westphal

Comput. Stat., 2022

2021

A branch & bound algorithm to determine optimal bivariate splits for oblique decision tree induction.

Ferdinand Bollwein, Stephan Westphal

Appl. Intell., 2021

An Auction-based Mechanism for the Formation and Scheduling of Heterogeneous Human-machine Teams.

Felix Merz, Christoph Schwindt, Stephan Westphal, Jürgen Zimmermann

Proceedings of the IEEE International Conference on Industrial Engineering and Engineering Management, 2021

2020

Engineering Human-Machine Teams for Trusted Collaboration.

Basel Alhaji, Janine Beecken, Rüdiger Ehlers, Jan Gertheiss, Felix Merz, Jörg P. Müller, Michael Prilla, Andreas Rausch, Andreas Reinhardt, Delphine Reinhardt, Christian Rembe, Niels-Ole Rohweder, Christoph Schwindt, Stephan Westphal, Jürgen Zimmermann

Big Data Cogn. Comput., 2020

A branch & bound algorithm to determine optimal cross-splits for decision tree induction.

Ferdinand Bollwein, Martin Dahmen, Stephan Westphal

Ann. Math. Artif. Intell., 2020

A Multi-Round Auction for Staff to Job Assignment Under Myopic Best Response Dynamics.

Felix Merz, Christoph Schwindt, Stephan Westphal, Jürgen Zimmermann

Proceedings of the IEEE International Conference on Industrial Engineering and Engineering Management, 2020

2019

Full implementation of social choice functions in dominant strategies.

Sven O. Krumke, Clemens Thielen, Philipp Weinschenk, Stephan Westphal

Int. J. Game Theory, 2019

Cross-provider Platoons for Same-day Delivery.

Sînziana-Maria Sebe, Philipp Kraus, Jörg P. Müller, Stephan Westphal

Proceedings of the 5th International Conference on Vehicle Technology and Intelligent Transport Systems, 2019

2017

Online interval scheduling with a bounded number of failures.

Marco Bender, Clemens Thielen, Stephan Westphal

J. Sched., 2017

2016

The online knapsack problem with incremental capacity.

Clemens Thielen, Morten Tiedemann, Stephan Westphal

Math. Methods Oper. Res., 2016

A combined local search and integer programming approach to the traveling tournament problem.

Marc Goerigk, Stephan Westphal

Ann. Oper. Res., 2016

A column generation approach for optimized routing and coordination of a UAV fleet.

Julia Zillies, Stephan Westphal, Dinesh Thakur, Vijay Kumar, George J. Pappas, David Scheidt

Proceedings of the 2016 IEEE International Symposium on Safety, 2016

2015

An optimal randomized online algorithm for the k-Canadian Traveller Problem on node-disjoint paths.

Marco Bender, Stephan Westphal

J. Comb. Optim., 2015

Packing items into several bins facilitates approximating the separable assignment problem.

Marco Bender, Clemens Thielen, Stephan Westphal

Inf. Process. Lett., 2015

An application of deterministic and robust optimization in the wood cutting industry.

Jonas Ide, Morten Tiedemann, Stephan Westphal, Felix Haiduk

4OR, 2015

2014

Scheduling the German Basketball League.

Stephan Westphal

Interfaces, 2014

A 5.875-approximation for the Traveling Tournament Problem.

Stephan Westphal, Karl Noparlik

Ann. Oper. Res., 2014

Maximum Generalized Assignment with Convex Costs.

Marco Bender, Stephan Westphal

Proceedings of the Combinatorial Optimization - Third International Symposium, 2014

Solving the Traveling Tournament Problem by Packing Three-Vertex Paths.

Marc Goerigk, Richard Hoshino, Ken-ichi Kawarabayashi, Stephan Westphal

Proceedings of the Twenty-Eighth AAAI Conference on Artificial Intelligence, 2014

2013

Sports Scheduling: Minimizing Travel for English Football Supporters.

Graham Kendall, Stephan Westphal

Proceedings of the Automated Scheduling and Planning - From Theory to Practice, 2013

Complexity and approximability of the maximum flow problem with minimum quantities.

Clemens Thielen, Stephan Westphal

Networks, 2013

A Constant Factor Approximation for the Generalized Assignment Problem with Minimum Quantities and Unit Size Items.

Marco Bender, Clemens Thielen, Stephan Westphal

Proceedings of the Mathematical Foundations of Computer Science 2013, 2013

Online Job Admission.

Sven O. Krumke, Rob van Stee, Stephan Westphal

Proceedings of the Fundamental Problems in Computing, 2013

2012

Approximation algorithms for TTP(2).

Clemens Thielen, Stephan Westphal

Math. Methods Oper. Res., 2012

2011

Complexity of the traveling tournament problem.

Clemens Thielen, Stephan Westphal

Theor. Comput. Sci., 2011

Interval scheduling on related machines.

Sven Oliver Krumke, Clemens Thielen, Stephan Westphal

Comput. Oper. Res., 2011

Online scheduling of weighted equal-length jobs with hard deadlines on parallel machines.

Sven Oliver Krumke, Alfred Taudes, Stephan Westphal

Comput. Oper. Res., 2011

MIP Formulations for Flowshop Scheduling with Limited Buffers.

Janick V. Frasch, Sven Oliver Krumke, Stephan Westphal

Proceedings of the Theory and Practice of Algorithms in (Computer) Systems, 2011

2010

Approximating the Traveling Tournament Problem with Maximum Tour Length 2.

Clemens Thielen, Stephan Westphal

Proceedings of the Algorithms and Computation - 21st International Symposium, 2010

2009

New lower bounds for online k-server routing problems.

Irene Fink, Sven Oliver Krumke, Stephan Westphal

Inf. Process. Lett., 2009

2008

A monotone approximation algorithm for scheduling with precedence constraints.

Sven Oliver Krumke, Anne Schwahn, Rob van Stee, Stephan Westphal

Oper. Res. Lett., 2008

Approximation algorithms for a vehicle routing problem.

Sven Oliver Krumke, Sleman Saliba, Tjark Vredeveld, Stephan Westphal

Math. Methods Oper. Res., 2008

A note on the k-Canadian Traveller Problem.

Stephan Westphal

Inf. Process. Lett., 2008

Pruning in column generation for service vehicle dispatching.

Stephan Westphal, Sven Oliver Krumke

Ann. Oper. Res., 2008

Improved Construction Heuristics and Iterated Local Search for the Routing and Wavelength Assignment Problem.

Kerstin Bauer, Thomas Fischer, Sven Oliver Krumke, Katharina Gerhardt, Stephan Westphal, Peter Merz

Proceedings of the Evolutionary Computation in Combinatorial Optimization, 2008

2006

Competitive Algorithms for Cottage Rental.

Stephan Westphal, Sven Oliver Krumke, Rob van Stee

Electron. Notes Discret. Math., 2006

Online-Optimization of Large-Scale Vehicle Dispatching Problems.

Sleman Saliba, Sven Oliver Krumke, Stephan Westphal

Electron. Notes Discret. Math., 2006