Stephan Westphal

Publication Activity (10 Years)

Years Active: 2006-2022
Publications (10 Years): 12

Top Topics

Decision Tree Induction

Top Venues

Ann. Oper. Res.

Ann. Math. Artif. Intell.

J. Comb. Optim.

Publications

Ferdinand Bollwein, Stephan Westphal
Oblique decision tree induction by cross-entropy optimization based on the von Mises-Fisher distribution. Comput. Stat. 37 (5) (2022)
Felix Merz, Christoph Schwindt, Stephan Westphal, J. Zimmermann
An Auction-based Mechanism for the Formation and Scheduling of Heterogeneous Human-machine Teams. IEEM (2021)
Ferdinand Bollwein, Stephan Westphal
A branch & bound algorithm to determine optimal bivariate splits for oblique decision tree induction. Appl. Intell. 51 (10) (2021)
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
Engineering Human-Machine Teams for Trusted Collaboration. Big Data Cogn. Comput. 4 (4) (2020)
Ferdinand Bollwein, Martin Dahmen, Stephan Westphal
A branch & bound algorithm to determine optimal cross-splits for decision tree induction. Ann. Math. Artif. Intell. 88 (4) (2020)
Felix Merz, Christoph Schwindt, Stephan Westphal, Juergen Zimmermann
A Multi-Round Auction for Staff to Job Assignment Under Myopic Best Response Dynamics. IEEM (2020)
Sînziana-Maria Sebe, Philipp Kraus, Jörg P. Müller, Stephan Westphal
Cross-provider Platoons for Same-day Delivery. VEHITS (2019)
Sven O. Krumke, Clemens Thielen, Philipp Weinschenk, Stephan Westphal
Full implementation of social choice functions in dominant strategies. Int. J. Game Theory 48 (1) (2019)
Marco Bender, Clemens Thielen, Stephan Westphal
Online interval scheduling with a bounded number of failures. J. Sched. 20 (5) (2017)
Marc Goerigk, Stephan Westphal
A combined local search and integer programming approach to the traveling tournament problem. Ann. Oper. Res. 239 (1) (2016)
Julia Zillies, Stephan Westphal, Dinesh Thakur, Vijay Kumar, George J. Pappas, David Scheidt
A column generation approach for optimized routing and coordination of a UAV fleet. SSRR (2016)
Clemens Thielen, Morten Tiedemann, Stephan Westphal
The online knapsack problem with incremental capacity. Math. Methods Oper. Res. 83 (2) (2016)
Marco Bender, Stephan Westphal
An optimal randomized online algorithm for the k-Canadian Traveller Problem on node-disjoint paths. J. Comb. Optim. 30 (1) (2015)
Marco Bender, Clemens Thielen, Stephan Westphal
Packing items into several bins facilitates approximating the separable assignment problem. Inf. Process. Lett. 115 (6-8) (2015)
Jonas Ide, Morten Tiedemann, Stephan Westphal, Felix Haiduk
An application of deterministic and robust optimization in the wood cutting industry. 4OR 13 (1) (2015)
Stephan Westphal, Karl Noparlik
A 5.875-approximation for the Traveling Tournament Problem. Ann. Oper. Res. 218 (1) (2014)
Marco Bender, Stephan Westphal
Maximum Generalized Assignment with Convex Costs. ISCO (2014)
Marc Goerigk, Richard Hoshino, Ken-ichi Kawarabayashi, Stephan Westphal
Solving the Traveling Tournament Problem by Packing Three-Vertex Paths. AAAI (2014)
Stephan Westphal
Scheduling the German Basketball League. Interfaces 44 (5) (2014)
Clemens Thielen, Stephan Westphal
Complexity and approximability of the maximum flow problem with minimum quantities. Networks 62 (2) (2013)
Sven O. Krumke, Rob van Stee, Stephan Westphal
Online Job Admission. Fundamental Problems in Computing (2013)
Marco Bender, Clemens Thielen, Stephan Westphal
A Constant Factor Approximation for the Generalized Assignment Problem with Minimum Quantities and Unit Size Items. MFCS (2013)
Clemens Thielen, Stephan Westphal
Approximation algorithms for TTP(2). Math. Methods Oper. Res. 76 (1) (2012)
Sven Oliver Krumke, Alfred Taudes, Stephan Westphal
Online scheduling of weighted equal-length jobs with hard deadlines on parallel machines. Comput. Oper. Res. 38 (8) (2011)
Janick V. Frasch, Sven Oliver Krumke, Stephan Westphal
MIP Formulations for Flowshop Scheduling with Limited Buffers. TAPAS (2011)
Clemens Thielen, Stephan Westphal
Complexity of the traveling tournament problem. Theor. Comput. Sci. 412 (4-5) (2011)
Sven Oliver Krumke, Clemens Thielen, Stephan Westphal
Interval scheduling on related machines. Comput. Oper. Res. 38 (12) (2011)
Clemens Thielen, Stephan Westphal
Approximating the Traveling Tournament Problem with Maximum Tour Length 2. ISAAC (2) (2010)
Irene Fink, Sven Oliver Krumke, Stephan Westphal
New lower bounds for online k-server routing problems. Inf. Process. Lett. 109 (11) (2009)
Stephan Westphal, Sven Oliver Krumke
Pruning in column generation for service vehicle dispatching. Ann. Oper. Res. 159 (1) (2008)
Kerstin Bauer, Thomas Fischer, Sven Oliver Krumke, Katharina Gerhardt, Stephan Westphal, Peter Merz
Improved Construction Heuristics and Iterated Local Search for the Routing and Wavelength Assignment Problem. EvoCOP (2008)
Sven Oliver Krumke, Anne Schwahn, Rob van Stee, Stephan Westphal
A monotone approximation algorithm for scheduling with precedence constraints. Oper. Res. Lett. 36 (2) (2008)
Sven Oliver Krumke, Sleman Saliba, Tjark Vredeveld, Stephan Westphal
Approximation algorithms for a vehicle routing problem. Math. Methods Oper. Res. 68 (2) (2008)
Stephan Westphal
A note on the k-Canadian Traveller Problem. Inf. Process. Lett. 106 (3) (2008)
Stephan Westphal, Sven Oliver Krumke, Rob van Stee
Competitive Algorithms for Cottage Rental. Electron. Notes Discret. Math. 25 (2006)
Sleman Saliba, Sven Oliver Krumke, Stephan Westphal
Online-Optimization of Large-Scale Vehicle Dispatching Problems. Electron. Notes Discret. Math. 25 (2006)