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Publications by Torbjörn Larsson in international journals
A meta-heuristic extension of the Lagrangian heuristic framework, Optimization Methods & Software, vol. 39, 2024, pp. 1008-1039 (with Uledi Ngulo and Nils-Hassan Quttineh)
Dwell time shaping in inverse treatment planning for cervical brachytherapy, Physics and Imaging in Radiation Oncology, vol. 32, 2024, art. no. 100672 (with Åsa Carlsson Tedgren, Frida Dohlmar, Björn Morén, Michael Sandborg)
A steepest feasible direction method for linear programming: Derivation and embedding in the simplex method, Operations Research and Decisions, vol. 34, 2024, pp. 163-182 (with Biressaw C. Wolde)
A Lagrangian bounding and heuristic principle for bi-objective discrete optimization, Operational Research: An International Journal, vol. 24, 2024, art. no. 14 (with Nils-Hassan Quttineh and Ida Åkerholm)
One-parametric analysis of column-oriented linear programs, Operations Research Perspectives, vol. 10, 2023, art. no. 100278 (with Nils-Hassan Quttineh)
Validation of automated post-adjustments of HDR prostate brachytherapy treatment plans by quantitative measures and oncologist observer study, Brachytherapy, vol. 22, 2023, pp. 407-415 (with Åsa Carlsson Tedgren, Frida Dohlmar, Björn Morén, Michael Sandborg, Örjan Smedby and Alexander Valdman)
Dosimetric impact of a robust optimization approach to mitigate effects from rotational uncertainty in prostate intensity-modulated brachytherapy, Medical Physics, vol. 50, 2023, pp. 1029-1043 (with Majd Antaki, Åsa Carlsson Tedgren, Shirin A. Enger, Gabriel Famulari, Marc Morcos and Björn Morén)
Evaluation of a spatial optimization model for prostate high dose-rate brachytherapy in a clinical treatment planning system, Medical Physics, vol. 50, 2023, pp. 688-693 (with Björn Andersson, Rasmus Bokrantz, Åsa Carlsson Tedgren, Frida Dohlmar, Björn Morén and Erik Setterquist)
Column generation extensions of set covering greedy heuristics, Operations Research Letters, vol. 50, 2022, pp. 738-744 (with Nils-Hassan Quttineh)
Long term projection of the demographic and financial evolution of the parliamentary pension scheme of Uganda, Operations Research and Decisions, vol. 32, no. 3, 2022, pp. 92-123 (with Juma Kasozi, Fred Mayambala and Herbert Mukalazi)
Approximating the Pareto frontier for a challenging real-world bi-objective covering problem, INFOR: Information Systems and Operational Research, vol. 60, 2022, pp. 342-358 (with Uledi Ngulo and Nils-Hassan Quttineh)
A theoretical justification of the set covering greedy heuristic of Caprara et al., Discrete Optimization, vol. 45, 2022, art. no. 100700 (with Nils-Hassan Quttineh)
Asset liability management for the Bank of Uganda defined benefits scheme by stochastic programming, Operations Research and Decisions, vol. 32, no. 2, 2022, pp. 105-124 (with Juma Kasozi, Fred Mayambala and Herbert Mukalazi)
Dissecting the duality gap: The supporting hyperplane interpretation revisited, Optimization Letters, vol. 16, 2022, pp. 1093-1102 (with Nils-Hassan Quttineh)
An optimization approach to the design of outdoor thermal fire detection systems, Fire Safety Journal, vol. 129, 2022, art. no. 103548 (with Hugo Lindell, Per-Magnus Olsson and Nils-Hassan Quttineh)
Emerging technologies in brachytherapy, Physics in Medicine & Biology, vol. 66, 2021, art. no. 23TR01 (with Åsa Carlsson Tedgren, Xun Jia, Björn Morén, James L. Robar and William Y. Song)
Optimization in treatment planning of high dose-rate brachytherapy — Review and analysis of mathematical models, Medical Physics, vol. 48, 2021, pp. 2057-2082 (with Åsa Carlsson Tedgren and Björn Morén)
Asset liability management for the parliamentary pension scheme of Uganda by stochastic programming, Afrika Statistika, vol. 16, 2021, pp. 2689-2716 (with Juma Kasozi, Fred Mayambala and Herbert Mukalazi)
An audit of high dose-rate prostate brachytherapy treatment planning at six Swedish clinics, Journal of Contemporary Brachytherapy, vol. 13, 2021, pp. 59-71 (with Frida Dohlmar, Sakarias Johansson, Michael Sandborg and Åsa Carlsson Tedgren)
Analysis of a reform option for the Tanzanian pension system, Tanzania Journal of Science, vol. 47, 2021, pp. 354-365 (with Andongwisye John)
Automating the planning of container loading for Atlas Copco: Coping with real-life stacking and stability constraints, European Journal of Operational Research, vol. 280, 2020, pp. 1018-1034 (with Jonas Olsson and Nils-Hassan Quttineh)
An integer programming column generation principle for heuristic search methods, International Transactions in Operational Research, vol. 27, 2020, pp. 665-695 (with Elina Rönnberg and Yixin Zhao)
A mathematical optimization model for spatial adjustments of dose distributions in high dose-rate brachytherapy, Physics in Medicine & Biology, vol. 64, 2019, art. no. 225012 (with Åsa Carlsson Tedgren and Björn Morén)
An extended dose-volume model in high dose-rate brachytherapy — Using mean-tail-dose to reduce tumor underdosage, Medical Physics, vol. 46, 2019, pp. 2556-2566 (with Åsa Carlsson Tedgren and Björn Morén)
An integer optimality condition for column generation on zero-one linear programs, Discrete Optimization, vol. 31, 2019, pp. 79-92 (with Elina Rönnberg)
The fixed charge transportation problem: A strong formulation based on Lagrangian decomposition and column generation, Journal of Global Optimization, vol. 72, 2018, pp. 517-538 (with Panos M. Pardalos, Elina Rönnberg and Yixin Zhao)
Mathematical optimization of high dose-rate brachytherapy — Derivation of a linear penalty model from a dose-volume model, Physics in Medicine & Biology, vol. 63, 2018, art. no. 065011 (with Åsa Carlsson Tedgren and Björn Morén)
Asset liability management for Tanzania pension funds by stochastic programming, Afrika Statistika, vol. 13, 2018, pp. 1733-1758 (with Andongwisye John, Allen Mushi and Martin Singull)
Ergodic, primal convergence in dual subgradient schemes for convex programming, II: The case of inconsistent primal problems, Mathematical Programming, vol. 163, 2017, pp. 57-84 (with Emil Gustavsson, Michael Patriksson, Ann-Brith Strömberg and Magnus Önnheim)
Projecting Tanzania pension fund system, African Journal of Applied Statistics, vol. 4, 2017, pp. 193-218 (with Andongwisye John, Allen Mushi and Martin Singull)
Power efficient uplink scheduling in SC-FDMA: Benchmarking by column generation, Optimization and Engineering, vol. 17, 2016, pp. 695-725 (with Lei Lei, Elina Rönnberg, Di Yuan and Yixin Zhao)
"Subben's checklist" and the assessment of articles in mathematical optimization/operations research: In memoriam of Subhash C. Narula, Computers and Operations Research, vol. 71, 2016, pp. 163-164 (with Michael Patriksson)
Heuristics for integrated optimization of catheter positioning and dwell time distribution in prostate HDR brachytherapy, Annals of Operations Research, vol. 236, 2016, pp. 319-339 (with Åsa Carlsson Tedgren and Åsa Holm)
Military aircraft mission planning — Efficient model-based metaheuristic approaches, Optimization Letters, vol. 9, 2015, pp. 1625-1639 (with Nils-Hassan Quttineh)
A generic column generation principle: Derivation and convergence analysis, Operational Research: An International Journal, vol. 15, 2015, pp. 163-198 (with Athanasios Migdalas and Michael Patriksson)
Subgradient optimization prior to column generation — A means for predicting optimal columns, International Journal of Pure and Applied Mathematics, vol. 103, 2015, pp. 797-818 (with Maud Göthe-Lundgren, Andreas Westerlund and Di Yuan)
A maximum flow formulation of a multi-period open-pit mining problem, Operational Research: An International Journal, vol. 14, 2014, pp. 1-10 (with Henry Amankwah and Björn Textorius)
All-integer column generation for set partitioning: Basic principles and extensions, European Journal of Operational Research, vol. 233, 2014, pp. 529-538 (with Elina Rönnberg)
A duality-based derivation of the maximum flow formulation of the open-pit design problem, International Journal of Pure and Applied Mathematics, vol. 92, 2014, pp. 449-457 (with Henry Amankwah and Björn Textorius)
A linear programming model for optimizing HDR brachytherapy dose distributions with respect to mean dose in the DVH-tail, Medical Physics, vol. 40, 2013, art. no. 081705 (with Åsa Carlsson Tedgren and Åsa Holm)
Military aircraft mission planning: A generalized vehicle routing model with synchronization and precedence, EURO Journal on Transportation and Logistics, vol. 2, 2013, pp. 109-127 (with Kaj Holmberg, Kristian Lundberg and Nils-Hassan Quttineh)
Impact of using linear optimization models in dose planning for HDR brachytherapy, Medical Physics, vol. 39, 2012, pp. 1021-1028 (with Åsa Carlsson Tedgren and Åsa Holm)
A comparison of feasible direction methods for the stochastic transportation problem, Computational Optimization and Applications, vol. 46, 2010, pp. 451-466 (with Maria Daneva, Michael Patriksson and Clas Rydergren)
Automating the self-scheduling process of nurses in Swedish healthcare: A pilot study, Health Care Management Science, vol. 13, 2010, pp. 35-53 (with Elina Rönnberg)
Allocation of link flow detectors for origin-destination matrix estimation — A comparative study, Computer-Aided Civil and Infrastructure Engineering, vol. 25, 2010, pp. 116-131 (with Jan Lundgren and Anders Peterson)
Column generation in the integral simplex method, European Journal of Operational Research, vol. 192, 2009, pp. 333-342 (with Elina Rönnberg)
Convergent Lagrangian heuristics for nonlinear minimum cost network flows, European Journal of Operational Research, vol. 189, 2008, pp. 324-346 (with Johan Marklund, Caroline Olsson and Michael Patriksson)
Lagrangian relaxation via ballstep subgradient methods, Mathematics of Operations Research, vol. 32, 2007, pp. 669-686 (with Krzysztof C. Kiwiel and Per Olov Lindberg)
A stabilized column generation scheme for the traveling salesman subtour problem, Discrete Applied Mathematics, vol. 154, 2006, pp. 2212-2238 (with Maud Göthe-Lundgren and Andreas Westerlund)
Global optimality conditions for discrete and nonconvex optimization — With applications to Lagrangian heuristics and column generation, Operations Research, vol. 54, 2006, pp. 436-453 (with Michael Patriksson)
A note on relatives to the Held and Karp 1-tree problem, Operations Research Letters, vol. 34, 2006, pp. 275-282 (with Maud Göthe-Lundgren and Andreas Westerlund)
An augmented Lagrangian algorithm for large scale multicommodity routing, Computational Optimization and Applications, vol. 27, 2004, pp. 187-215 (with Di Yuan)
A column generation procedure for the side constrained traffic equilibrium problem, Transportation Research Part B, vol. 38, 2004, pp. 17-38 (with Michael Patriksson and Clas Rydergren)
Inverse nonlinear multicommodity flow optimization by column generation, Optimization Methods and Software, vol. 18, 2003, pp. 601-613 (with Michael Patriksson and Clas Rydergren)
On the convergence of conditional ε-subgradient methods for convex programs and convex-concave saddle-point problems, European Journal of Operational Research, vol. 151, 2003, pp. 461-473 (with Michael Patriksson and Ann-Brith Strömberg)
Ergodic, primal convergence in dual subgradient schemes for convex programming, Mathematical Programming, vol. 86, 1999, pp. 283-312 (with Michael Patriksson and Ann-Brith Strömberg)
The efficiency of ballstep subgradient level methods for convex optimization, Mathematics of Operations Research, vol. 24, 1999, pp. 237-254 (with Krzysztof C. Kiwiel and Per Olov Lindberg)
Side constrained traffic equilibrium models — Analysis, computation and applications, Transportation Research Part B, vol. 33, 1999, pp. 233-264 (with Michael Patriksson)
Ergodic convergence in subgradient optimization, Optimization Methods and Software, vol. 9, 1998, pp. 93-120 (with Michael Patriksson and Ann-Brith Strömberg)
An efficient Lagrangean relaxation scheme for linear and integer equal flow problems, Optimization, vol. 44, 1998, pp. 49-67 (with Zhuangwei Liu)
A dual scheme for traffic assignment problems, Optimization, vol. 42, 1997, pp. 323-358 (with Zhuangwei Liu and Michael Patriksson)
A Lagrangean relaxation scheme for structured linear programs with application to multicommodity network flows, Optimization, vol. 40, 1997, pp. 247-284 (with Zhuangwei Liu)
Conditional subgradient optimization — Theory and applications, European Journal of Operational Research, vol. 88, 1996, pp. 382-403 (with Michael Patriksson and Ann-Brith Strömberg)
An augmented Lagrangean dual algorithm for link capacity side constrained traffic assignment problems, Transportation Research Part B, vol. 29, 1995, pp. 433-455 (with Michael Patriksson)
Simultaneous structural analysis and design based on augmented Lagrangian duality, Structural Optimization, vol. 9, 1995, pp. 1-11 (with Mikael Rönnqvist)
Sequential quadratic programming for non-linear elastic contact problems, International Journal for Numerical Methods in Engineering, vol. 38, 1995, pp. 137-165 (with Gunnar Björkman, Anders Klarbring, Mikael Rönnqvist and Björn Sjödin)
Equilibrium characterizations of solutions to side constrained asymmetric traffic assignment models, Le Matematiche, vol. 49, 1994, pp. 249-280 (with Michael Patriksson)
A Lagrangean heuristic for the capacitated concave minimum cost network flow problem, European Journal of Operational Research, vol. 78, 1994, pp. 116-129 (with Athanasios Migdalas and Mikael Rönnqvist)
A class of gap functions for variational inequalities, Mathematical Programming, vol. 64, 1994, pp. 53-79 (with Michael Patriksson)
A set covering reformulation of the pure fixed charge transportation problem, Discrete Applied Mathematics, vol. 48, 1994, pp. 245-259 (with Maud Göthe-Lundgren)
A streamlined approximation and duality scheme for structural optimization, Structural Optimization, vol. 7, 1994, pp. 103-111 (with Örjan Jonsson and Mikael Rönnqvist)
A partial linearization method for the traffic assignment problem, Optimization, vol. 28, 1993, pp. 47-61 (with Athanasios Migdalas and Michael Patriksson)
On scaling linear programs — Some experimental results, Optimization, vol. 27, 1993, pp. 355-373
A method for structural optimization which combines second-order approximations and dual techniques, Structural Optimization, vol. 5, 1993, pp. 225-232 (with Mikael Rönnqvist)
A characterization of the uncapacitated network design polytope, Operations Research Letters, vol. 12, 1992, pp. 159-163 (with Johan Hellstrand and Athanasios Migdalas)
Simplicial decomposition with disaggregated representation for the traffic assignment problem, Transportation Science, vol. 26, 1992, pp. 4-17 (with Michael Patriksson)
An entropy model with variable target, Environment and Planning A, vol. 22, 1990, pp. 493-506 (with Kurt Jörnsten, Jan Lundgren and Athanasios Migdalas)
Lagrangean relaxation and subgradient optimization applied to optimal design with discrete sizing, Engineering Optimization, vol. 16, 1990, pp. 221-233 (with Örjan Jonsson)
A note on step-size restrictions in approximation procedures for structural optimization, Computers and Structures, vol. 37, 1990, pp. 259-263 (with Örjan Jonsson)
A Benders decomposition based heuristic for the hierarchical production planning problem, European Journal of Operational Research, vol. 45, 1990, pp. 4-14 (with Karen Aardal)
An algorithm for nonlinear programs over Cartesian product sets, Optimization, vol. 21, 1990, pp. 535-542 (with Athanasios Migdalas)
A Lagrangean relaxation scheme for a scheduling problem, Asia-Pacific Journal of Operational Research, vol. 7, 1990, pp. 155-162 (with Örjan Jonsson and Peter Värbrand)
Page responsible: Torbjörn Larsson
Last updated: 2024-12-03