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Publications by Torbjörn Larsson in international journals


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)

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Last updated: 2022-11-28