Blar i NTNU Open på forfatter "Andersson, Henrik"
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Offshore supply planning in a rolling time horizon
Fernandez Cuesta, Eirik; Andersson, Henrik; Fagerholt, Kjetil (Journal article; Peer reviewed, 2018)This paper presents a real transportation problem stemming from offshore oil and gas logistics and shows how optimization models used in a rolling horizon simulation framework can be very valuable to assess and improve the ... -
Optimal Charging and Repositioning of Electric Vehicles in a Free-Floating Carsharing System
Folkestad, Carl Axel Aadne; Hansen, Nora Åsheim; Fagerholt, Kjetil; Andersson, Henrik; Pantuso, Giovanni (Journal article; Peer reviewed, 2019)Carsharing has received increased attention from the Operations Research community in recent years. Currently, many systems are adopting electric vehicles that require charging when battery levels fall below a given level. ... -
Optimal Handling and Repositioning of Modern Carsharing Systems - A Hybrid Genetic Search with Adaptive Diversity Control Approach
Folkestad, Carl Axel Aadne; Hansen, Nora Åsheim (Master thesis, 2017)Carsharing systems have emerged as an attractive form of transport in urban areas since the beginning of the 21st century. Effective carsharing systems carry significant environmental advantages as well as economic advantages ... -
Optimal Repositioning in Bike Sharing Systems
Kristianslund, Johannes; Espegren, Hans Martin (Master thesis, 2016)This thesis examines the static bicycle repositioning problem (SBRP) and the dynamic bicycle repositioning problem (DBRP) which deal with optimal re-balancing of bike sharing systems (BSSs) during the night and during the ... -
Optimeringsbasert beslutningsstøtte for distribusjon av fornybar energi i maritime verdikjeder
Andersen, Kristian; Sjamsutdinov, Aslanbek (Master thesis, 2011)Trevirke som er blitt tørket og komprimert til pellets har et høyt energiinnhold og er gunstig til oppvarmingsformål. I Norge i dag foregår distribusjonen av trepellets ved landbasert transport, og det eksisterer få ... -
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. ... -
Optimisation-Based Nurse Scheduling for Real-Life Instances
Beckmann, Francesco R; Klyve, Kjartan Kastet (Master thesis, 2016)In this master s thesis we present a planning problem at Maternity Ward West (MWW) at St. Olavs Hospital, concerning the scheduling of 69 employees for a planning horizon of 27 weeks. The scheduling problem involves covering ... -
Optimization and Simulation of Platform Supply Pickup and Delivery - Case from the Brazilian Petroleum Industry
Hagen, Martine Rambøl (Master thesis, 2014)The oil industry has a vital role in energy provision and the economic aspects of its operations, which is associated with high values and risks. Continuous oil production from fields is essential, and it is important that ... -
Optimization of investment decisions and production planning in aging offshore petroleum fields
Storvold, Vegard Svarlien (Master thesis, 2012)This thesis suggests that an optimization model can be used as decision support when different subsea solutions are evaluated in order to increase hydrocarbon recovery and production lifetime of a field. The Marlim field ... -
Optimization of Offshore Oil and Gas Logistics
Cuesta, Eirik Fernández Cuesta (Doctoral theses at NTNU;2017:103, Doctoral thesis, 2017)Summary of the thesis This thesis considers the logistical task of supplying offshore oil and gas platforms using methodology from the field of Operations Research (OR) and is part of the research performed by the Center ... -
Optimization of Oil Production - Applied to the Marlim Field
Langvik, Andrea Sundby; Dzubur, Lamija (Master thesis, 2012)This thesis considers short-term petroleum production planning at the Marlim field operated by the Brazilian energy company, Petrobras. The production asset to be optimized is an Floating Production and Storage Operating ... -
Optimization of subsea investments: A combined investment and production strategy problem solved by combining optimization and simulation
Alfsen, Mats (Master thesis, 2013)Petroleum is one of our most valued resources, and our industrial civilization heavily relies on it. To meet the demand for petroleum, provide the highest economic contribution to the society and still comply with the ... -
Optimizing environmental and economic aspects of collaborative transportation and logistics related to construction and demolition projects
Halvorsen, Eirik Oskari (Master thesis, 2019)Overskuddsmasser fra bygg- og anleggsprosjekter representerer den største avfallskategorien i mange regioner rundt omkring i verden. Slike masser har et stort, uutnyttet resirkuleringspotensial. For å imøtekomme nasjonale ... -
Optimizing environmental and economic aspects of collaborative transportation and logistics related to infrastructure projects - A case study from Norway
Halvorsen, Eirik Oskari; Andersson, Henrik (Peer reviewed; Journal article, 2022)The main challenge addressed in this paper is how to handle and recycle the large amount of C&D waste that is generated from infrastructure projects. The study is motivated by Bærum Ressursbank in Norway and their aim of ... -
Optimizing Maritime Preparedness Under Uncertainty – Locating Tugboats Along the Norwegian Coast
Musæus, Julie Lovise; Nøstvik, Håkon M.; Andersson, Henrik; Schütz, Peter (Peer reviewed; Journal article, 2021)We study the strategic problem of locating tugboats along the Norwegian coast to optimize maritime preparedness. The problem is formulated as a two-stage stochastic program. In the first stage, we locate the tugboats such ... -
Optimizing Resource Allocation during Epidemic Outbreaks: An Approximate Dynamic Programming Approach for Cholera
Olstad, Martin Willoch (Master thesis, 2020)Epidemiutbrudd påvirker mennesker over hele kloden. COVID-19 pandemien viser at til tross for store mediniske framskritt de siste tiårene, er det stadig behov for en effektiv respons ved epidemiutbrudd. Selv for sykdommer ... -
Personnel Planning in Health Care: Optimization of Nurse and Physician Rosters with real-life applications
Klyve, Kjartan Kastet (Doctoral theses at NTNU;2021:344, Doctoral thesis, 2021)Personnel rostering is challenging in multiple ways. Firstly, creating rosters is an inherently complex task from a combinatorial perspective. Secondly, as rosters reflect operations at a ward and affect the lives of staff, ... -
Predicting Retail Revenues in Norway Using Machine Learning: A Data-Driven Approach
Kjærran, Adrian; Strømstad, Simen (Master thesis, 2022)Butikkeiere og innehavere av kommersiell eiendom har felles utfordringer knyttet til å forstå de underliggende faktorene som påvirker inntekter og definerer passende lokasjoner for ulike typer butikker innen detaljhandel, ... -
Real-Time Data-Driven and Hybrid Modeling of Two-Phase Flow in Oil and Gas Wells - A study on how data quality affects model accuracy and the application of neural networks for flow estimation
Sjulstad, Christine Foss; Almås, Ingeborg Victoria Aarsvold (Master thesis, 2020)Denne avhandlingen forsøker å estimere to-fase-flyt for olje- og gassbrønner i sanntid ved bruk av den nyeste teknologien innenfor datadrevne og hybride modeller. Siden fokuset er på enkeltbrønner, modellerer vi brønnspesifikke ... -
Rebalancing and Charging Strategies in Electric Bike Sharing Systems - A Two-Stage Stochastic Programming Column Generation Heuristic
Fosen, Sigrid; Haldorsen, Øyvor Salvesen (Master thesis, 2020)Denne oppgaven undersøker hvordan man kan maksimere kundetilfredshet i et elektrisk bysykkelsystem ved bruk av servicebiler som utfører batteribytter og rebalansering av sykler. I et elektrisk bysykkelsystem tilbys elektriske ...