Viser treff 487-506 av 916

    • Modeling and Simulation of Heat Transfer in Blocks with Thin Pipes 

      Karlsen, Renate (Master thesis; Mastergradsoppgave, 2017-06-13)
      "The report presents modified Stokes equations and natural convection-diffusion equations that are needed to implement a system which uses natural convection to transport energy from one area to another. The thesis also includes results from a numerical simulations that used these equations as arguments."
    • Modeling and simulation of space debris distribution 

      Bredeli, Thomas Iversen (Master thesis; Mastergradsoppgave, 2013-07-01)
    • Modeling Bottom-Up Visual Attention Using Dihedral Group D4 

      Sharma, Puneet (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-15)
      In this paper, first, we briefly describe the dihedral group D4 that serves as the basis for calculating saliency in our proposed model. Second, our saliency model makes two major changes in a latest state-of-the-art model known as group-based asymmetry. First, based on the properties of the dihedral group D4, we simplify the asymmetry calculations associated with the measurement of saliency. ...
    • Modeling of Pressure and Temperature Profiles for the Flow of CO2 through a Restriction 

      Leyli, Amir Nadem; Jackson, Steven; Khawaja, Hassan; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-19)
      CO<sub>2</sub> emissions due to massive industrialization have led to several environmental issues. Carbon Capture and Storage (CCS) is one of the most important technologies that can be used to reduce anthropogenic CO<sub>2</sub> emissions worldwide. CCS projects mainly involve three processes: carbon capture, transportation, and storage. In the transportation process, the modeling of the flow in ...
    • Modeling the impact of indoor relative humidity on the infection risk of five respiratory airborne viruses 

      Aganovic, Amar; Bi, Yang; Cao, Guangyu; Kurnitski, Jarek; Wargocki, Pawel (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-07)
      With a modified version of the Wells-Riley model, we simulated the size distribution and dynamics of five airborne viruses (measles, influenza, SARS-CoV-2, human rhinovirus, and adenovirus) emitted from a speaking person in a typical residential setting over a relative humidity (RH) range of 20–80% and air temperature of 20–25 °C. Besides the size transformation of virus-containing droplets due to ...
    • Modell for kontroll av innlevert FDV-dokumentasjon for bygg. Model for control of management, operation and maintenances documentation for construction works 

      Dibaba, Dejenu Zerga (Master thesis; Mastergradsoppgave, 2018-08-16)
      The report discuss requirement established/set by Planning and Building Act (PBL), Technical Regulations (TEK) and responsibilities that client representant has for the control of FDV handover. The consequences due to loss of FDV -documents for those who manage, operate, maintain and develop a building can be a cost and quality concern after the project is completed and handed over. NS 3456:2010 ...
    • Modelled and observed sea-spray icing in Arctic-Norwegian waters 

      Samuelsen, Eirik Mikal; Edvardsen, Kåre; Graversen, Rune (Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-11-15)
      Hazardous marine icing is a major concern for ships operating in Arctic waters during freezing conditions. Sea spray generated by the interaction between a ship and ocean waves is the most important water source in these dangerous icing events. Although there exist several data sets with observations of ice accretion in conjunction with meteorological and oceanographic parameters, these data sets ...
    • Modelling An Improved Ship Appointment System for Lockage Operations of Waterway Transport 

      Zhao, Xu; Liu, Shun; Gao, Pan; Yu, Hao (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-10)
      The traffic congestion problem has become a significant challenge for green shipping of inland waterway transport, resulting in long waiting times and high carbon emissions. Several studies have been conducted to optimize the use of the passing facilities and lockage efficiency, but the improvement of the ship appointment system has not been investigated. In this paper, we formulate new mathematical ...
    • Modelling and analysis of long cables on the generator side of generator transformers 

      Jørgensen, Kjetil N. (Master thesis; Mastergradsoppgave, 2023-05-22)
      Denne oppgaven presenterer en studie om modellering og analyse av lengre kraftkabler på generatorsiden av en enhetstransformator i et generisk kraftsystem. Studien fokuserer på det teoretiske rammeverket som er nødvendig for å forstå problemet. De teoretiske delene inkluderer grunnleggende elektriske sannheter og deres effekter på hovedkomponentene i et kraftsystem. Den gjenværende teorien ...
    • Modelling and simulating a hybrid electric vehicle 

      Leikarnes, Ivar Roskifte (Master thesis; Mastergradsoppgave, 2017-06-12)
      This thesis presents an overview of the different types of hybrid electric vehicle structures and basic guidelines regarding choice of components. The simulation model of a hybrid electric vehicle was created for this thesis to investigate the impact on fuel efficiency in relation to rolling resistance coefficient and vehicle weight. Although the model is not designed for optimal engine operation, ...
    • Modelling and simulation of interaction forces in tugboat-assisted docking of large marine vessels 

      Kristiansen, Raymond; Ørke, Henning; Gravdahl, Jan Tommy (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-22)
      In this paper, we address modelling and simulation of dynamics involved in docking of large marine vessels with aid of tugboats, with the aim of providing a tool for improved design of control algorithms for autonomous docking operations. Mathematical models of the docking vessel and tugboats in 3DOF are derived, with a special focus on realistic interactions through towline, contact and friction ...
    • Modelling and Simulation of the HDPE Pyrolysis Process 

      Eidesen, Hans-Kristian; Khawaja, Hassan; Jackson, Steven (Conference object; Konferansebidrag, 2017)
      Pyrolysis is a thermochemical decomposition of organic compounds such as High-density polyethylene (HDPE) plastics. The product of the HDPE pyrolysis is usually diesel with other wastes (such as carbon black, etc.). A pyrolysis reaction is essentially a decomposition reaction performed at elevated temperatures in the absence of oxygen. This work aims to describe some of the primary driving reactions ...
    • Modelling Multi-layer Hydronic Radiators 

      Chen, Liguo; Sørensen, Bjørn Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-30)
      This report simulates Purmo type C22 and C33 radiators with both standard calculation and heat transfer method with help of Matlab/Simulink. Simulation results are presented to describe the radiators’ thermal performances with different simulation strategies. The deviations between two different calculation methods are identified and the heat transfer radiator model can be improved with more ...
    • Modified demagnetisation control strategy for low-voltage ride-through enhancement in DFIG-based wind systems 

      Senapati, Manoj Kumar; Nayak, Paresh Kumar; Padmanaban, Sanjeevikumar; Gjengedal, Terje (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-16)
      The large-scale wind energy conversion systems (WECSs) based on doubly-fed induction generators (DFIGs) are very popular in recent years due to the numerous technical and economic benefits. With the increasing penetration level of wind energy, the latest grid codes require the DFIG-based WECSs to remain connected to the grid under grid fault scenarios and deliver the required reactive power into ...
    • A Modified Version of the IEEE 39-bus Test System for the Day-Ahead Market 

      Tricarico, Gioacchino; Wagle, Raju; Dicorato, Maria; Forte, Giuseppe; Gonzalez-Longatt, Francisco; Rueda, Jose Luis (Chapter; Bokkapittel, 2023-03-28)
      Reaching net-zero emissions within the proposed time requires an enormous effort from the energy sector, and it is even more challenging for the electricity infrastructure. This article offers a modified version of the IEEE 39-bus system specifically created to allow zonal day-ahead market (ZDAM) simulations. The system representation is based on the original version of the IEEE 39-bus system but ...
    • Modular Design of Integrated Duct Fan Quadrotor Structure 

      Rones, Andre; Hoff, Sven Ole (Master thesis; Mastergradsoppgave, 2017-06-15)
      This thesis will continue the work done by Sethuram Balakrishnan in his master thesis “Duct fanned shielding design for quadrotors”. It includes studies of integrating Balakrishnan’s solution to the outer structure of the DJI Flame Wheel F450 Quadrotor in order to save weight. A report with preliminary work will cover investigation of existing solutions and technology, setting design requirements ...
    • Monitoring of nitrogen oxides at Svalbard: measurements in Adventdalen 

      Dekhtyareva, Alena; Holmén, Kim; Hermanson, Mark H (Conference object; Konferansebidrag, 2017)
    • Motion capturing machine learning. Bluetooth motion sensors 

      Gangenes, Elisabeth Razafimandimby (Master thesis; Mastergradsoppgave, 2016-04-06)
      Good and efficient care for our elderly is a major concern in our ever aging popu- lation. The elderly’s greatest fear is falling to the ground, not being able to get up or get help. Use of Bluetooth motion sensors and appropriate agents can help alert for in the event of a person falling. In this master thesis an experimental sensor rig has been created together with an android application which ...
    • Moving from Industry 4.0 to Industry 5.0: What Are the Implications for Smart Logistics? 

      Jafari, Niloofar; Azarian, Mohammad; Yu, Hao (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-01)
      Given the importance of human centricity, resilience, and sustainability, the emerging concept of Industry 5.0 has pushed forward the research frontier of the technology-focused Industry 4.0 to a smart and harmonious socio-economic transition driven by both humans and technologies, where the role of the human in the technological transformation is predominantly focused on. Several studies discuss ...
    • Multi-agent Reinforcement Learning for Structured Symbolic Music Generation 

      Dadman, Shayan; Bremdal, Bernt Arild (Chapter; Bokkapittel, 2023-07-12)
      Generating structured music using deep learning methods with symbolic representation is challenging due to the complex relationships between musical elements that define a musical composition. Symbolic representation of music, such as MIDI or sheet music, can help overcome some of these challenges by encoding the music in a format that allows manipulation and analysis. However, the symbolic ...