Now showing items 24-43 of 64

    • Identification of signals describing pairwise interaction in plankton, bacteria and bacteriophage : a study of model, microcosm and lake 

      Sandvik, Gunnar (Doctoral theses at NTNU;2003:54, Doctoral thesis; Peer reviewed, 2003)
      This study concerns interaction between organisms. Such interactions are often studied through organism abundances over periods of time (time-series). Time-series reflect both internal (biological) and external (environmental) ...
    • An Image Processing Framework for High Speed Videos from Combustion and Gas Explosion Experiments 

      Maharjan, Samee (Doctoral dissertations at the University of South-Eastern Norway;83, Doctoral thesis, 2020-12-18)
      The method of high speed photography is used to visualize those phenomena which occur so fast that it is impossible to visualize by the normal human eyes. One of those phenomena is a shock wave propagation during gas ...
    • Image-based sizing techniques for fire water droplets 

      Lundberg, Joachim (Doctoral dissertations at TUC;2015:5, Doctoral thesis; Peer reviewed, 2015-11-12)
      The Norwegian petroleum industry has developed a standard for the technical safety of offshore installations (NORSOK S-001, 2008). When dimensioning accidental load with this standard, the deluge or fire water spray may ...
    • Impact erosion by solid particles in gas-particle flows 

      Ediriweera, Mahesh (Doctoral thesis, 2021-06-18)
      Mass loss of inner wall surface due to particle impact, also referred as erosive wear, is a common challenge encountered in industrial pneumatic conveying systems. Previous studies have shown that erosion is a process ...
    • Intelligent frequency control for the secure operation of modern power system 

      Acosta Montalvo, Martha Nohemi (Doctoral dissertations at the University of South-Eastern Norway;103, Doctoral thesis, 2021-09-23)
      The modern power system is experiencing several changes to meet the objective to become in a zero CO2 emissions industry. The principal changes are the high penetration of renewable energy sources (RESs) into the power ...
    • Low temperature methanol synthesis catalysed by a copper nanoparticle-alkoxide system 

      Ahoba-Sam, Christian (Doctoral dissertations at the University of South-Eastern Norway;6, Doctoral thesis, 2018-06-28)
      Methanol (MeOH) synthesis at low temperature in a liquid medium presents the possibility of achieving full syngas conversion per pass. The Low temperature MeOH synthesis (LTMS) process is advantageous over the current ...
    • Mass transfer characteristics of CO2 absorption into liquid droplets 

      Han, Jingyi (Doctoral dissertations at TUC;2014:1, Doctoral thesis; Peer reviewed, 2014-01-21)
      CO2 capture from exhaust gases has been paid more and more attention in order to avoid global warming. One of the methods for removing CO2 from the flue gas streams is the use of absorption and aqueous alkanolamine solutions ...
    • Mass Transfer Kinetics of Carbon Dioxide into Concentrated Aqueous Solutions of Monoethanolamine 

      Ying, Jiru (Doctoral dissertations at TUC;2013:2, Doctoral thesis; Peer reviewed, 2013-02-15)
      Global warming arguments have gained more and more attention due to the new regulations of carbon dioxide (CO2) emission in the world. Monoethanolamine (MEA) has been employed as an important industrial absorbent for CO2 ...
    • Methane production from lignocellulosic residues 

      Ghimire, Nirmal (Doctoral dissertations at the University of South-Eastern Norway;93, Doctoral thesis, 2021-05-25)
      Aims: Biochar production by intermediate pyrolysis of renewable lignocellulosic biomass to replace traditional carbon material as a reducing agent and energy source in the metallurgical industries produces carbon rich waste ...
    • Modeling for Automatic Control and Estimation of Influx and Loss During Drilling Operations 

      Berg, Christian (Doctoral dissertations at the University of South-Eastern Norway;61, Doctoral thesis, 2020-03-20)
      In the modern energy driven world, oil and gas will be important resources, at least in the foreseeable future. Wells with challenging pressure windows are more com-monly drilled, and in recent years the drop in oil prices ...
    • Modeling, Control and Optimization of a Hydropower Plant 

      Zhou, Wenjing (Doctoral dissertations at the University College of Southeast Norway;33, Doctoral thesis, 2017-12-19)
      Hydropower is a crucial power resource for everyday life in Norway, and a traditional industry that could be improved along with new updated technologies. The PhD work focuses on exploring new solutions, in aspect of ...
    • Modelling and simulations of bubbling fluidized bed and entrained flow biomass gasification reactors 

      Timsina, Ramesh (Doctoral dissertations at the University of South-Eastern Norway;118, Doctoral thesis, 2022-02-24)
      The world needs sustainable energy solutions to replace fossil fuels. Climate change is the defining challenge of our time. New reports from the International Energy Agency (IEA, 2021)1 have developed a roadmap for max ...
    • Modelling of ash melts in gasification of biomass 

      Furuvik, Nora Cecilie Ivarsdatter Skau (Doctoral dissertations at the University of South-Eastern Norway;120, Doctoral thesis, 2022-03-04)
      The need for advanced biofuels produced from sustainable sources is stressed, both on national and international level due to a global agreement to limit the Earth’s global warming. The major goals in the Norwegian agreement ...
    • Modelling of gas explosions 

      Vågsæther, Knut (Doctoral theses at NTNU;2010:221, Doctoral thesis; Peer reviewed, 2010-12-03)
      The content of this thesis is a study of gas explosions in complex geometries and presentation and validation of a method for simulating flame acceleration and deflagration to detonation transition. The thesis includes a ...
    • Models and Estimators for Flow of Topside Drilling Fluid 

      Jinasena, Asanthi (Doctoral dissertations at the University of South-Eastern Norway;44, Doctoral thesis, 2019-10-08)
      The reduction of risk and non-productive time in oil drilling is a key research interest in the oil and gas industry. The early detection of kick and loss is a crucial part in safe well control operations, thus, it plays ...
    • Multivariable process control in high temperature and high pressure environment using non-intrusive multi sensor data fusion 

      Nygaard, Olav Gerhard Haukenes (Doctoral theses at NTNU;2006:38, Doctoral thesis; Peer reviewed, 2006)
      The main objective of this thesis is to use available knowledge about a process and combine this with measurement data from the same process to extract more information about the process. The combination of knowledge and ...
    • Multivariate image regression (MIR) for quantitative predictions : prototype software implementation and selected industrial-technological pilot studies 

      Lied, Thorbjørn Tønnesen (Doctoral theses at NTNU;2000:99, Doctoral thesis; Peer reviewed, 2000)
      In large and important sectors of modern production, there is an increased demand for on-line or at-line information. Both consumers and governmental regulations require that producers can document the quality of their ...
    • On Process Simulation and Learning Technologies 

      Marcano Canelones, Laura Andreína (Doctoral dissertations at the University of South-Eastern Norway;45, Doctoral thesis, 2019-10-16)
      This thesis provides additional insights into the field of simulator training. Al-though numerous studies have identified how to improve simulator technologies and team training practices, little analytic attention has ...
    • One-step Conversion of Ethylene to Propylene by a NiSO₄-ReO x/γ-A1₂O₃ Catalyst 

      Li, Lu (Doctoral dissertations at the University College of Southeast Norway;4, Doctoral thesis, 2016-06-22)
      The demand for propylene has dramatically increased due to the discovery of propylene’s derivatives (e.g. polypropylene). The propylene production from the conventional processes (steam cracking process and a refinery fluid ...
    • Optimization of flow behavior in biomass gasification reactor 

      Thapa, Rajan Kumar (Doctoral dissertations at TUC;2015:2, Doctoral thesis, 2015)
      Dual fluidized bed reactor for steam gasification of biomass is a promising technology and can be used in Combined Heat and Power (CHP) production. The producer gas from the reactor can have a calorific value up to 14 ...