Blar i NTNU Open på forfatter "Stålhane, Magnus"
-
An iterative matheuristic for the inventory routing problem
Vadseth, Simen Tung; Andersson, Henrik; Stålhane, Magnus (Peer reviewed; Journal article, 2021)The paper considers the inventory routing problem with the Maximum Level replenishment policy. Here, the supplier is in charge of replenishing goods to a number of customers and can decide when, and in what order, these ... -
Maritime fleet composition under future greenhouse gas emission restrictions and uncertain fuel prices
Loennechen, Olav; Fagerholt, Kjetil; Lagemann, Benjamin; Stålhane, Magnus (Peer reviewed; Journal article, 2024)This paper studies the maritime fleet composition problem with uncertain future fuel and carbon prices under the restriction of complying with future greenhouse gas (GHG) emission restrictions. We propose a two-stage ... -
Matheuristic Approaches to the Short-term LNG Routing and Scheduling Problem
Svensson, Henrik Klauset; Alhayek, Mohammed; Manheim, Bjørn Løvland (Master thesis, 2019)Naturgass er forventet å spille en viktig rolle i en overgang mot energiproduksjon med lavere klimagassutslipp, som for eksempel $CO_2$. I forbindelse med langdistanse handel og transport av naturgass, er gassen kjølt ... -
Modelling Off-Ball Decision Making in Swedish Top Division Football
Cook, Tristan Kristoffer; Keil, Eivind; Sætherø, Inge Dovre (Master thesis, 2020)Den publiserte analytiske forskningen innen fotball er voksende, men fortsatt finnes flere interessante aspekter ved idretten som ikke er belyst gjennom akademisk forskning. Denne masteroppgaven søker å supplementere ... -
Multi-Depot Periodic Vehicle Routing Problem under Cleaning Constraints at the Oslo Metro
Ljønes, Jørgen Ringvold (Master thesis, 2020)Kollektivtransportsystemer som T-banen i Oslo dekker en essensiell del av storbyers behov for persontransport. Verden opplever en økende urbanisering og etterspørsel etter klimavennlige transportløsninger. Større og mer ... -
Multi-Product, Multi-Period Supply Chain Network Optimization for Offshore Wind Projects under Uncertainty
Bergem, Kristoffer Strand (Master thesis, 2023)Sammendrag I denne oppgaven studeres forsyningskjeden til et offshore vindprosjekt. Problemet som studeres er planlegging og koordinasjon forsyningskjeden med hensikt å minimere total kostnad. Problemet tar hensyn til ... -
A multi-start route improving matheuristic for the production routing problem
Vadseth, Simen Tung; Andersson, Henrik; Stålhane, Magnus; Chitsaz, Masoud (Peer reviewed; Journal article, 2023)This paper considers the multi-vehicle production routeing problem with a maximum-level replenishment policy. This is a well-established problem within vendor managed inventory where production, inventory and routeing ... -
New benchmark instances for the inventory routing problem
Skålnes, Jørgen; Ben Ahmed, Mohamed; Hvattum, Lars Magnus; Stålhane, Magnus (Journal article; Peer reviewed, 2023)The existing sets of benchmark instances for the inventory routing problem (IRP) have been beneficial for investigating and illustrating the properties of the problem. However, they possess certain features and design ... -
A new formulation for the liner shipping network design problem
Ameln, Marie; Fuglum, Julie Sand; Thun, Kristian; Andersson, Henrik; Stålhane, Magnus (Peer reviewed; Journal article, 2019)The liner shipping network design problem (LSNDP) is an important problem within liner shipping because a good network can reduce costs and increase profits. Given sets of ports, vessel classes, and demands between the ... -
New Mathematical Programming-based Algorithms for Solving Rich Vehicle Routing Problems
Vadseth, Simen Tung (Doctoral theses at NTNU;2023:370, Doctoral thesis, 2023)This thesis addresses rich vehicle routing problems (VRPs) and introduces innovative algorithms for solving them. VRPs are vital in logistics, optimizing routes for the delivery of goods. Rich VRPs which incorporate ... -
Operation and Maintenance Modelling
Welte, Thomas Michael; Sperstad, Iver Bakken; Halvorsen-Weare, Elin Espeland; Netland, Øyvind; Nonås, Lars Magne; Stålhane, Magnus (Chapter, 2018)Operational expenditure (OPEX) is one of the major contributors to the levelized cost of energy (LCoE) for offshore wind farms. To assess different solutions and select the best ones, good models for maintenance and logistics ... -
Operational Planning and Disruption Management in Offshore Logistics
Krey, Stian; Albjerk, Nils Blegeberg; Danielsen, Teodor Kristoffer (Master thesis, 2015)This thesis considers operational planning and disruption management in the offshore supply service in Statoil, the biggest Norwegian oil and gas company. A significant amount of time is needed for operational planning, ... -
Operational planning for routes and schedules for a fleet of fuel supply vessels
Christiansen, Marielle; Fagerholt, Kjetil; Rachaniotis, Nikos; Stålhane, Magnus (Journal article; Peer reviewed, 2017)This paper considers a real operational problem of routing and scheduling a fleet of fuel supply vessels used to service customer ships anchored outside a major port. The problem can be formulated as a rich multi-trip ... -
Optimal maritime fleet composition under future greenhouse gas emissions restrictions and uncertain fuel prices
Loennechen, Olav (Master thesis, 2023)Shippingindustrien er en stor bidragsyter til globale klimagassutslipp. En viktig faktor for industrien sine store utslipp er dens avhengighet av tung fyringsolje med høyt karboninnhold. For å redusere utslippene, bør ... -
Optimal Scheduling of Maintenance Tasks and Routing of a Joint Vessel Fleet for Multiple Offshore Wind Farms
Ødeskaug, Katrine; Raknes, Nora Tangen (Master thesis, 2015)Wind energy is among the fastest growing electricity generation systems in the world. However, the offshore wind industry is challenged with still being far more costly than conventional energy sources. Operation and ... -
Optimisation of Manganese Alloy Multi-plant Production Planning
Digernes, Martin Naterstad; Rudi, Lars (Master thesis, 2017)The average concentration of manganese in the earth s crust is nearly 0.1%, making it the fourth most abundant of the metals in commercial use. Manganese alloys are mainly consumed as alloying elements in the steel industry. ... -
Optimization in Roll-on Roll-off Shipping : Applications to ship stowage and single trade ship routing
Hansen, Jone Reinlund (Doctoral theses at NTNU;2021:359, Doctoral thesis, 2021)Summary of the thesis This thesis considers planning problems arising in the Roll-on Roll-off (RoRo) shipping industry. The problems are formulated and described mathematically, and methodology from the field of Operations ... -
Optimization of maritime routing and scheduling problems with complicating inter-route constraints
Stålhane, Magnus (Doktoravhandlinger ved NTNU, 1503-8181; 2013:55, Doctoral thesis, 2013) -
Optimization of routing and scheduling for performing maintenance at offshore wind farms
Skaar, Vidar (Master thesis, 2014)As the demand for energy in general and renewable energy in particular grows, so does the wind energy industry. As the more easily accessible sites available for wind turbines are exhausted, new sites must be found elsewhere. ... -
Optimization of routing and scheduling of vessels to perform maintenance at offshore wind farms
Stålhane, Magnus; Hvattum, Lars Magnus; Skaar, Vidar (Journal article; Peer reviewed, 2015)This paper studies the problem of finding the optimal routes and schedules for a fleet of vessels that are to perform maintenance tasks at an offshore wind farm. To solve the problem two alternative models are presented: ...