Publikationen
Prof. Dr. Clemens Thielen
Forschungsartikel in wissenschaftlichen Zeitschriften
[1] C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten, Approximating multiobjective optimization problems: How exact can you be?, Mathematical Methods of Operations Research (online first), https://doi.org/10.1007/s00186-023-00836-x. [2] J. Boeckmann, C. Thielen, New ways in municipal flood mitigation: A mixed-integer programming approach and its practical application, Operations Research Forum (online first), https://doi.org/10.1007/s43069-023-00246-z. [3] S. Helfrich, A. Herzel, S. Ruzika, C. Thielen, Using scalarizations for the approximation of multiobjective optimization problems: Towards a general theory, Mathematical Methods of Operations Research (online first), https://doi.org/10.1007/s00186-023-00823-2. [4] J. Boeckmann, U. Pferschy, C. Thielen, Approximating single- and multi-objective nonlinear sum and product knapsack problems, Discrete Optimization 48 (2023) 100771. [5] A. Herzel, S. Helfrich, S. Ruzika, C. Thielen, Approximating biobjective minimization problems using general ordering cones, Journal of Global Optimization 86 (2023) 393–415. [6] S. Helfrich, A. Herzel, S. Ruzika, C. Thielen, An approximation algorithm for a general class of multi-parametric optimization problems, Journal of Combinatorial Optimization 44 (2022) 1459-1494. [7] C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten, An approximation algorithm for a general class of parametric optimization problems, Journal of Combinatorial Optimization 43 (2022) 1328-1358. [8] C. Bazgan, S. Ruzika, C. Thielen, D. Vanderpooten, The power of the weighted sum scalarization for approximating multiobjective optimization problems, Theory of Computing Systems 66 (2022) 395-415. [9] S. Boesen, A. Raith, C. Thielen, J. Tidswell, Enforcing fuel-optimal traffic patterns, EURO Journal on Transportation and Logistics 10 (2021) 100060. [10] J. Tidswell, A. Downward, C. Thielen, A. Raith, Minimising emissions in traffic assignment with non-monotonic arc costs, Transportation Research Part B: Methodological 153 (2021) 70-90. [11] J. Boeckmann, C. Thielen, A (B+1)-approximation for network flow interdiction with unit costs, Discrete Applied Mathematics (online first), doi.org/10.1016/j.dam.2021.07.008. [12] A. Giudici, T. Lu, C. Thielen, R. Zuidwijk, An analysis of the stability of hinterland container transport cooperation, Transportation Science 55 (2021) 1170-1186. [13] U. Pferschy, J. Schauer, C. Thielen, Approximating the product knapsack problem, Optimization Letters 15 (2021) 2529-2540. [14] C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten, One-exact approximate Pareto sets, Journal of Global Optimization 80 (2021) 87-115. [15] A. Herzel, S. Ruzika, C. Thielen, Approximation methods for multiobjective optimization problems: A survey, INFORMS Journal on Computing 33 (2021) 1284-1299. [16] Z. Abel, J. Bosboom, M. Coulombe, E. D. Demaine, L. Hamilton, A. Hesterberg, J. Kopinsky, J. Lynch, M. Rudoy, C. Thielen, Who witnesses The Witness? Finding witnesses in The Witness is hard and sometimes impossible, Theoretical Computer Science 839 (2020) 41–102. [17] K. Riga, K. Jahr, C. Thielen, A. Borrmann, Mixed integer programming for dynamic tower crane and storage area optimization on construction sites, Automation in Construction 120 (2020) Article 103384. [18] S. O. Krumke, C. Thielen, P. Weinschenk, S. Westphal, Full implementation of social choice functions in dominant strategies, International Journal of Game Theory 48 (1) (2019) 337–361. [19] A. Herzel, M. Hopf, C. Thielen, Multistage interval scheduling games, Journal of Scheduling 22 (3) (2019) 359–377. [20] C. Thielen, Duty rostering for physicians at a department of orthopedics and trauma surgery, Operations Research for Health Care 19 (2018) 80–91. [21] H. Corsten, M. Hopf, B. Kasper, C. Thielen, Assortment planning for multiple chain stores, OR Spectrum 40 (4) (2017) 875–912. [22] P. Halffmann, S. Ruzika, C. Thielen, D. Willems, A general approximation method for bicriteria minimization problems, Theoretical Computer Science 695 (2017) 1–15. [23] M. Holzhauser, S. O. Krumke, C. Thielen, On the complexity and approximability of budget-constrained minimum cost flows, Information Processing Letters 126 (2017) 24–29. [24] M. Bender, C. Thielen, S. Westphal, Online interval scheduling with a bounded number of failures, Journal of Scheduling 20 (2017) 443–457. [25] M. Hopf, C. Thielen, O. Wendt, Competitive algorithms for multistage online scheduling, European Journal of Operational Research 260 (2) (2017) 468–481. [26] A. Giudici, P. Halffmann, S. Ruzika, C. Thielen, Approximation schemes for the parametric knapsack problem, Information Processing Letters 120 (2017) 11–15. [27] M. Holzhauser, S. O. Krumke, C. Thielen, A network simplex method for the budget-constrained minimum cost flow problem, European Journal of Operational Research 259 (3) (2017) 864–872. [28] M. Holzhauser, S. O. Krumke, C. Thielen, Maximum flows in generalized processing networks, Journal of Combinatorial Optimization 33 (4) (2017) 1226–1256. [29] A. Chassein, S. O. Krumke, C. Thielen, Capacitated network design games with weighted players, Networks 68 (2) (2016) 141–158. [30] C. Thielen, M. Tiedemann, S. Westphal, The online knapsack problem with incremental capacity, Mathematical Methods of Operations Research 83 (2) (2016) 207–242. [31] M. Holzhauser, S. O. Krumke, C. Thielen, Budget-constrained minimum cost flows, Journal of Combinatorial Optimization 31 (4) (2016) 1720–1745. [32] M. Holzhauser, S. O. Krumke, C. Thielen, Convex generalized flows, Discrete Applied Mathematics 190-191 (2015) 86–99. [33] M. Bender, C. Thielen, S. Westphal, Packing items into several bins facilitates approximating the separable assignment problem, Information Processing Letters 115 (6–8) (2015) 570–575. [34] S. O. Krumke, C. Thielen, The generalized assignment problem with minimum quantities, European Journal of Operational Research 228 (1) (2013) 46–55. [35] C. Thielen, S. Westphal, Complexity and approximability of the maximum flow problem with minimum quantities, Networks 62 (2) (2013) 125–131. [36] C. Thielen, S. Westphal, Approximation algorithms for TTP(2), Mathematical Methods of Operations Research 76 (1) (2012) 1–20. [37] S. O. Krumke, C. Thielen, C. Zeck, Extensions to online delay management on a single train line: New bounds for delay minimization and profit maximization, Mathematical Methods of Operations Research 74 (1) (2011) 53–75. [38] S. O. Krumke, C. Thielen, S. Westphal, Interval scheduling on related machines, Computers and Operations Research 38 (12) (2011) 1836–1844. [39] S. O. Krumke, C. Thielen, Minimum cost flows with minimum quantities, Information Processing Letters 111 (11) (2011) 533–537. [40] C. Thielen, S. Westphal, Complexity of the traveling tournament problem, Theoretical Computer Science 412 (4-5) (2011) 345–351. [41] C. Thielen, S. O. Krumke, Truthful mechanisms for selfish routing and two-parameter agents, Theory of Computing Systems 49 (1) (2011) 196–223.
Forschungsartikel in referierten Tagungs- und Sammelbänden
Jan Boeckmann, M.Sc.
Forschungsartikel in wissenschaftlichen Zeitschriften
[1] J. Boeckmann, C. Thielen, New ways in municipal flood mitigation: A mixed-integer programming approach and its practical application, Operations Research Forum (online first), https://doi.org/10.1007/s43069-023-00246-z. [2] J. Boeckmann, U. Pferschy, C. Thielen, Approximating single- and multi-objective nonlinear sum and product knapsack problems, Discrete Optimization 48 (2023) 100771. [3] J. Boeckmann, C. Thielen, A (B+1)-approximation for network flow interdiction with unit costs, Discrete Applied Mathematics (online first), doi.org/10.1016/j.dam.2021.07.008.Forschungsartikel in referierten Tagungs- und Sammelbänden
Dr. Arne Herzel
Forschungsartikel in wissenschaftlichen Zeitschriften
[1] C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten, Approximating multiobjective optimization problems: How exact can you be?, Mathematical Methods of Operations Research (online first), https://doi.org/10.1007/s00186-023-00836-x. [2] S. Helfrich, A. Herzel, S. Ruzika, C. Thielen, Using scalarizations for the approximation of multiobjective optimization problems: Towards a general theory, Mathematical Methods of Operations Research (online first), https://doi.org/10.1007/s00186-023-00823-2. [3] A. Herzel, S. Helfrich, S. Ruzika, C. Thielen, Approximating biobjective minimization problems using general ordering cones, Journal of Global Optimization 86 (2023) 393–415. [4] S. Helfrich, A. Herzel, S. Ruzika, C. Thielen, An approximation algorithm for a general class of multi-parametric optimization problems, Journal of Combinatorial Optimization 44 (2022) 1459-1494. [5] C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten, An approximation algorithm for a general class of parametric optimization problems, Journal of Combinatorial Optimization 43 (2022) 1328-1358. [6] C. Bazgan, A. Herzel, S. Ruzika, C. Thielen, D. Vanderpooten, One-exact approximate Pareto sets, Journal of Global Optimization 80 (2021) 87-115. [7] A. Herzel, S. Ruzika, C. Thielen, Approximation methods for multiobjective optimization problems: A survey, INFORMS Journal on Computing 33 (2021) 1284-1299. [8] A. Herzel, M. Hopf, C. Thielen, Multistage interval scheduling games, Journal of Scheduling 22 (3) (2019) 359–377.
Forschungsartikel in referierten Tagungs- und Sammelbänden