Viser treff 101-120 av 923

    • MCSINC. Summarising the main findings of work package 1: Demands and requirements for machine sensing infrastructure. 

      Venæs, Janne; Sande, André Bekkevold; Tangrand, Kristoffer Meyer; Seter, Hanne; Arnesen, Petter (Research report; Forskningsrapport, 2023)
      The main objective of the MCSINC project is to identify the opportunities and challenges with Al-based machine vision of road infrastructure under Nordic conditions. Work package 1 focuses specifically on "Demands and requirements for machine sensing infrastructure". This project report summarises the work done in work package 1 in the MCSINC-project: a state of the art on machine sensing under ...
    • Voltage Control in Smart Distribution Network with High Integration of DERs 

      Wagle, Raju (Doctoral thesis; Doktorgradsavhandling, 2023-12-08)
      The thesis aims to address research questions of how the high integration of distributed energy resources (DER) influences the voltage profile of the distribution network and how the smart converters in DERs can be utilized to address voltage violations. For this purpose, the thesis investigates the coordinated active and reactive power control in smart converters to mitigate voltage violations. To ...
    • Effect of pH, COD, and HRT on the Performance of Microbial Fuel Cell Using Synthetic Dairy Wastewater 

      Banerjee, Aritro; Calay, Rajnish K; Das, Subhashis (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-30)
      Microbial fuel cells (MFC) are emerging technologies that can produce electricity while treating wastewater. A series of tests were carried out to evaluate the efficiency of this technology for treating dairy wastewater (DWW). The experiments used Shewanella baltica as an exoelectrogen in a small single MFC to treat simulated DWW. The impacts of various operational factors, specifically pH, ...
    • Post-COVID ventilation design: Infection risk-based target ventilation rates and point source ventilation effectiveness 

      Kurnitski, Jarek; Kiil, Martin; Mikola, Alo; Võsa, Karl-Villem; Aganovic, Amar; Schild, Peter G.; Seppänen, Olli (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-19)
      Ventilation, air filtration and disinfection have been found to be the main engineering measures to control the airborne respiratory infection transmission in shared indoor spaces. Wells-Riley model modifications allow to calculate the infection risk probability, but gaps in viral load data, risk control methods and dealing with incomplete mixing have resulted in ventilation recommendations falling ...
    • Luftfuktighet i bolighus 

      Hansen, Mona (Master thesis; Mastergradsoppgave, 2023-05-14)
      Denne masteroppgaven er en litteraturstudie av luftfuktighet i bolighus, i tillegg til en case studie i bolighus knyttet til luftfuktighet ved planter. Oppgaven dekker litteraturstudie knyttet til forskning og fakta både i Norge og internasjonalt. Ifølge verdens helseorganisasjon (WHO) oppholder en person seg 90 % av tiden innendørs. Luftfuktighet er en av faktorene som er avgjørende for at inneklima ...
    • Technology Modules Providing Solutions for Agile Manufacturing 

      Deniša, Miha; Ude, Aleš; Simonič, Mihael; Kaarlela, Tero; Pitkäaho, Tomi; Pieskä, Sakari; Arents, Janis; Judvaitis, Janis; Ozols, Kaspars; Raj, Levente; Czmerk, András; Dianatfar, Morteza; Latokartano, Jyrki; Schmidt, Patrick Alexander; Mauersberger, Anton; Singer, Adrian; Arnarson, Halldor; Shu, Beibei; Dimosthenopoulos, Dimosthenis; Karagiannis, Panagiotis; Ahonen, Teemu-Pekka; Valjus, Veikko; Lanz, Minna (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-01)
      : In this paper, we address the most pressing challenges faced by the manufacturing sector, particularly the manufacturing of small and medium-sized enterprises (SMEs), where the transition towards high-mix low-volume production and the availability of cost-effective solutions are crucial. To overcome these challenges, this paper presents 14 innovative solutions that can be utilized to support ...
    • Atmospheric Ice Accretion on Railway Overhead Powerline Conductors- A Numerical Case Study 

      Lotfi, Arefeh; Virk, Muhammad Shakeel; Pettersen, Jan-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-16)
      Ice accretion on railway overhead contact wires/conductors can cause various critical operational and safety issues such as overloading, arc formation, mass imbalance, and wire galloping. The focus of this multiphase numerical study is to understand and analyze the ice accretion physics on railway overhead powerline conductors at various operating conditions. In this regard, two different ...
    • Multi-objective optimization of energy-efficient retrofitting strategies for single-family residential homes: Minimizing energy consumption, CO2 emissions and retrofit costs 

      Kadrić, Džana; Aganovic, Amar; Kadrić, Edin (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-08)
      The retrofitting of buildings for improved energy efficiency has been recognized as crucial for achieving climate mitigation goals in Bosnia and Herzegovina (B&H). However, performing multi-objective optimizations for retrofitting existing buildings poses challenges, as it requires balancing conflicting objectives such as retrofit costs, energy savings, and CO<sub>2</sub> reduction. To tackle ...
    • Study of Airflow Behavior for Duplex Circular Cylinders 

      Sokolov, Pavlo; Virk, Muhammad Shakeel (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-16)
      The modeling of atmospheric ice accretion on duplex cylinders received a limited attention, with modeling carried by Wagner and Qing et al. The publicly available experimental data about the ice accretion on the duplex cylinders is limited to experiments of Qing et al. and Veerakumar et al. When comparing the data of Wagner and Qing et al. with the results of Veerakumar et al., the major ...
    • Comparing optimization schemes for solving case studies with multiple heat exchangers using high-order pinch point temperature difference methods 

      Brodal, Eivind; Jackson, Steven Richard; Eiksund, Oddmar (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-21)
      Heat exchangers (HEs) are often modeled using pinch point temperature difference (ΔT<sub>pinch</sub>) methods when optimizing systems with HEs. However, even small inaccuracies in model predictions of HEs will introduce numerical noise that can cause optimization algorithms to fail. A recent study of single HEs suggests that highorder interpolation methods can compute ΔT<sub>pinch</sub> much faster ...
    • Mapping Marine Macroalgae along the Norwegian Coast Using Hyperspectral UAV Imaging and Convolutional Nets for Semantic Segmentation 

      Skjelvareid, Martin Hansen; Rinde, Eli; Hancke, Kasper; Blix, Katalin; Hoarau, Galice Guillaume (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-20)
      Marine macroalgae form underwater "blue forests" with several important functions. Hyperspectral imaging from unmanned aerial vehicles provides a rich set of spectral and spatial data that can be used to map the distribution of such macroalgae. Results from a study using 81 annotated hyper-spectral images from the Norwegian coast are presented. A U-net convolutional network was used for classification, ...
    • A Novel Technique to Mitigate the Overlap-Time Effect in Current Source Inverters 

      Sohail, Umer; Østrem, Trond; Hoff, Bjarte (Chapter; Bokkapittel, 2023-08-31)
      Generally, the current source inverter is considered more reliable than the voltage source inverter due to the presence of inductor as an energy storage element on the DC link, but a disruption in the inductor current could significantly risk its reliability. To guarantee the reliable operation of current source inverter, an overlap time must be added to the gate signals of its switches. This ensures ...
    • Clustering of clinical multivariate time-series utilizing recent advances in machine-learning 

      Asgari, Asal (Master thesis; Mastergradsoppgave, 2023-05-14)
      The purpose of this thesis is to set the groundwork for future research on developing a machine-learning based anomaly detection system for hospitalized patients. Our first step was to study and analyze the project’s needs, background, and literature examining similar criteria. In the second step, we interviewed medical experts and researchers. Based on our research and the suggestions received ...
    • Co-simulation-based optimal reactive power control in smart distribution network 

      Wagle, Raju; Pham, Le Nam Hai; Tricarico, Gioacchino; Sharma, Pawan; Rueda, Jose Luis; Gonzalez-Longatt, Francisco (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-30)
      The increasing integration of distributed energy resources such as photovoltaic (PV) systems into distribution networks introduces intermittent and variable power, leading to high voltage fluctuations. High PV integration can also result in increased terminal voltage of the network during periods of high PV generation and low load consumption. These problems can be solved by optimal utilization ...
    • A Two-Stage Decision-Support System for Floating Debris Collection in Reservoir Areas 

      Gao, Pan; Du, Wangmiao; Yu, Hao; Zhao, Xu (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-14)
      The accumulation of floating debris is one of the main challenges of water conservancy projects, which may pollute the vulnerable ecosystem of the reservoir area and impose significant risks on waterway transportation and dam operations. Due to the dynamicity and uncertainty caused by water flow, the collection of floating debris is much more complicated than on-land waste collection. In this paper, ...
    • Supply Chain Control Tower and the Adoption of Intelligent Dock Booking for Improving Efficiency 

      Wyciślak, Sławomir; Pourhejazy, Pourya (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-13)
      Poor coordination at distribution centers is a prime source of supply chain delays and energy waste that can be avoided through real-time planning and enhanced visibility. As a modern logistics topic with implications for supply chain transformation, Intelligent Dock Booking (IDB) coordinates the incoming and outgoing shipments at distribution centers. The research on IDB is at the early development ...
    • Real-Time Voxel-based 2D to 3D CT Visualisation Framework for Volumetric Capacity Estimation 

      Schuchter, Arthur; Petrarolo, Giovanni; Grießner, Dominik (Journal article; Tidsskriftartikkel, 2022)
      Over the decades medical analyses have grown in importance and practice possibilities. Digital operations like split-image procedures have become an integral part of modern medical practices and are still gaining momentum. Through the application of this technique medical computed tomography (CT) and magnetic resonance imaging scans (MRI) can be converted to three-dimensional bodies. This paper ...
    • A Co-simulation Procedure for Optimal Reactive Power Control in Active Distribution Networks 

      Tricarico, Gioacchino; Wagle, Raju; Martinez, Jesus Castro; Gonzalez-Longatt, Francisco; Dicorato, Maria; Forte, Giusenne; Rueda, Jose Luis (Chapter; Bokkapittel, 2023)
      Distribution grids are subject to a drastic evolution in their operating conditions due to the high integration of renewable energy resources (RES) and their ability to regulate voltage. To cope with this issue, modern solar photovoltaic (PV) systems are equipped with smart inverters enabled with communication capabilities that allow the coordinated operation to offer services such as controlling ...
    • Computational fluid dynamics - a stepping stone of multiphysics 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022)
    • Statistical Prediction of Rate Constants for the Pyrolysis of High-Density Plastic Waste 

      Un Nabi, Rao Adeel; Naz, Yasin; Shukrullah, Shazia; Khawaja, Hassan (Conference object; Konferansebidrag, 2022)
      The 400 million tons of waste plastic are disposed of around the world. A study reported by SINTEF estimates that the Norwegian fishing fleet dumps around 380 tons of plastic material in the ocean each year. This waste is increasing at an alarming rate, threatening aquatic life, polluting the environment, and causing serious diseases. Since this waste includes hydrocarbons and is a massive source ...