Viser treff 881-900 av 919

    • Utilizing Local Flexibility Resources to Mitigate Grid Challenges at Electric Vehicle Charging Stations 

      Ilieva, Iliana; Bremdal, Bernt Arild (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-12)
      Charging of electric vehicles (EVs) on a large scale can cause problems for the grid. Utilizing local flexibility resources, such as smart charging, stationary battery, vehicle-to-grid applications, and local generation can be an efficient way to contain the grid challenges and mitigate the need for grid reinforcement. Focusing on the INSPIRIA charging station located in Norway, this paper investigates ...
    • Utnyttelse av digitale data i byggefasen for småhusentreprenører 

      Pedersen, Kristian; Lindberg, Emil (Master thesis; Mastergradsoppgave, 2022-05-14)
      Digital transformasjon i bygge-, anleggs- og eiendomsnæringen (BAE-næringen) sees på som en felles løsning for å motvirke produktivitetsnedgangen i bransjen. Utveksling av data mellom aktører, høy automatiseringsgrad og utnyttelse av data og trekkes frem som hovedpunkter i den digitale transformasjonen. Bygningsinformasjonsmodellering (BIM) har en sentral rolle i dette og beskrives som et nav i ...
    • Utnytting av energi i vannforsyning for oppvarming av større bygg 

      Chen, Liguo (Master thesis; Mastergradsoppgave, 2017-06-08)
      Det anbefales et varmepumpeanlegg med tre sammenkoblete varmepumper som benytter kommunes backup drikkevannsforsyning som varmekilde. Anlegget kan levere 262 kW varmeeffekt til Salangen bo- og eldresenter og Vasshaug barnehage. Økonomisk vurdering viser at prosjektet har en positiv nåverdi på 3,8 mil. kroner og 2,9 år inntjeningstid.
    • Utvikling av digitale læringsressurser for forkurs for ingeniørutdanning på tvers av studiesteder 

      Esjeholm, Bjørn Tore; Fredriksen, Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-25)
      Fra høsten 2019 har forkursene for ingeniørutdanning ved UiT -Norges arktiske universitet deltatt i prosjektet «Sammen 2021» der målet er å bedre gjennomstrømmingen og øke rekrutteringen til ingeniørstudiene gjennom å forbedre studieopplegget og læ ringsprosessene i alle fagene på forkursene. Forkurs/realfagskurs tilbys i dag ved studiestedene Alta, Tromsø, Narvik og ...
    • Validation of air ventilation in tunnels, using experiments and computational fluid dynamics 

      Myrvang, Torgeir; Khawaja, Hassan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018)
      The study presented in this paper concerns the ventilation system inside tunnels. The ventilation system is responsible for the removal of exhaust gases produced by vehicles and for providing a clear view throughout the tunnels in routine operations and in the event of fire. The ventilation system has several stages, which are equipped with one or more fans and can be activated together or separately. ...
    • A value chain analysis for bioenergy production from biomass and biodegradable waste: a case study in Northern Norway 

      Yu, Hao; Roman, Elisabeth; Solvang, Wei Deng (Peer reviewed; Chapter, 2018-09-12)
      During the past decades, the concerns of the depletion of fossil fuels and global warming caused by excess GHG emissions have become the most important driving force for the development and utilization of renewable energy resources. The successful experiences from the EU-28 have proved that bioenergy production from biomass and biodegradable waste is the most reliable and promising solution in ...
    • Variable Neighborhood-based Cuckoo Search for Production Routing with Time Window and Setup Times 

      Wu, Gen-Han; Cheng, Chen-Yang; Pourhejazy, Pourya; Fang, Bai-Lyn (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-23)
      Major corporations compete over the strengths of their supply chains. Integrating production and distribution operations helps improve supply chain connectedness and responsiveness beyond the standalone optimization norms. This study proposes an original Mixed-Integer Linear Programming (MILP) formulation for the Production scheduling-based Routing Problem with Time Window and Setup Times (PRP-TWST). ...
    • Ventilation and environmental control of underground spaces: A short review 

      Li, Angui; Kosonen, Risto; Melikov, Arsen; Yang, Bin; Olofsson, Thomas; Sørensen, Bjørn Reidar; Zhang, Linhua; Cui, Ping; Han, Ou (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-13)
      More and more underground spaces were used in 21st century because of rapid urbanization, traffic problems, etc. Underground city, metro, tunnel, mine, industrial and agriculture engineering, civil air defence engineering need large underground spaces. Underground spaces with different thermal, ventilation and lighting environments may cause comfort, health and safety problems. Concrete problems ...
    • Ventilation design conditions associated with airborne bacteria levels within the wound area during surgical procedures: a systematic review 

      Aganovic, Amar; Cao, Guangyu; Fečer, Tomáš; Ljungqvist, Bengt L.; Lytsy, Birgitta; Radtke, Andreas; Reinmüller, Berit; Traversari, Roberto A.A.L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-26)
      Without confirmation of the ventilation design conditions (typology and airflow rate), the common practice of identifying unidirectional airflow (UDAF) systems as equivalent to ultra-clean air ventilation systems may be misleading, but also any claims about the ineffectiveness of UDAF systems should be doubted. The aim of this review was to assess and compare ventilation system design conditions for ...
    • Verdiskapende samspill i prosjekteringsprosessen med VDC som prosjektform 

      Nordbakk, Kornelia Rognmo (Master thesis; Mastergradsoppgave, 2018-08-16)
      Virtual Design and Construction er en arbeidsmetodikk som bygger på Lean-tankegangen og setter mennesker, prosesser og nye verktøy i en logisk rekkefølge og sammenheng. VDC består av 4 byggesteiner; Bygningsinformasjonsmodellering (BIM), Integrated Concurrent Engineering (ICE), målinger og prosesser. Ved bruk av ICE-sesjoner vil det optimalt sett føre til integrert og tverrfaglig prosjektering. For ...
    • Vilenkin–Lebesgue Points and Almost Everywhere Convergence for Some Classical Summability Methods 

      Nadirashvili, Nato; Persson, Lars-Erik; Tephnadze, George; Weisz, Ferenc (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-17)
      The concept of Vilenkin–Lebesgue points was introduced in [12], where the almost everywhere convergence of Fejer means of Vilenkin–Fourier series was proved. In this paper, we present a different (and simpler) approach to prove a similar result, which can be used to prove that the corresponding result holds also in a more general context, namely for regular Norlund and T-means.
    • Vision-based Robotic Grasping in Simulation using Deep Reinforcement Learning 

      Danielsen, Jostein René (Master thesis; Mastergradsoppgave, 2021-05-18)
      This thesis will investigate different robotic manipulation and grasping approaches. It will present an overview of robotic simulation environments, and offer an evaluation of PyBullet, CoppeliaSim, and Gazebo, comparing various features. The thesis further presents a background for current approaches to robotic manipulation and grasping by describing how the robotic movement and grasping can be ...
    • Visual SLAM Approach with a Low-Power Remote Robot Agent 

      Jakobsen, Stian Endrè (Master thesis; Mastergradsoppgave, 2023-05-15)
      This master’s thesis examines the viability of using a low-performance, low- power-consumption remote robot agent to collect sensor data for use in a vSLAM system. Selections for the components of the robot agent were made based on results from a small initial study, the robot was assembled, and software to run it was created. A remote server application was created to communicate with the robot ...
    • The Volcanic Hazards of Jan Mayen Island (North-Atlantic) 

      Gjerløw, Eirik; Höskuldsson, Ármann; Bartolini, Stefania; Biass, Sebastien; Mossoux, Sophie; Gilbert, Jennie S.; Pedersen, Rolf Birger Svarstad; Marti, Joan (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-04)
      Hazard assessment of remote volcanic islands provides many challenges compared to other volcanoes and volcanic fields. Here we present the first systematic volcanic hazard assessment of Jan Mayen Island, a remote island located in the North-Atlantic Ocean and home to the northernmost active subaerial volcano in the world (Beerenberg Volcano), and we discuss some of the challenges and characteristics ...
    • 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 ...
    • Wavelet neural networks versus wavelet-based naural networks 

      Dechevski / Dechevsky, Lubomir Todorov; Tangrand, Kristoffer Meyer (Journal article; Tidsskriftartikkel; Peer reviewed, 2023)
      This is the first paper in a sequence of studies including also [#!llhm2022!#] and [#!llhm2022_1!#] in which we introduce a new type of neural networks (NNs) – wavelet-based neural networks (WBNNs) – and study their properties and potential for applications. We begin this study with a comparison to the currently existing type of wavelet neural networks (WNNs) and show that WBNNs vastly outperform ...
    • Weighted Boundedness of Certain Sublinear Operators in Generalized Morrey Spaces on Quasi-Metric Measure Spaces Under the Growth Condition 

      Samko, Natasha Gabatsuyevna (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-17)
      We prove weighted boundedness of Calderón–Zygmund and maximal singular operators in generalized Morrey spaces on quasi-metric measure spaces, in general non-homogeneous, only under the growth condition on the measure, for a certain class of weights. Weights and characteristic of the spaces are independent of each other. Weighted boundedness of the maximal operator is also proved in the case when ...
    • Weighted fractional Hardy operators and their commutators on generalized Morrey spaces over quasi-metric measure spaces 

      Samko, Natasha Gabatsuyevna (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-22)
      We study commutators of weighted fractional Hardy-type operators within the frameworks of local generalized Morrey spaces over quasi-metric measure spaces for a certain class of “radial” weights. Quasi-metric measure spaces may include, in particular, sets of fractional dimentsions. We prove theorems on the boundedness of commutators with CMO coefficients of these operators. Given a domain ...
    • Weighted Hardy Operators in Complementary Morrey Spaces 

      Lukkassen, Dag; Persson, Lars Erik; Samko, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
    • Weighted Hardy Operators in Complementary Morrey Spaces 

      Lukkassen, Dag; Persson, Lars-Erik; Samko, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-11-11)
      We study the weighted -boundedness of the multidimensional weighted Hardy-type operators and with radial type weight , in the generalized complementary Morrey spaces defined by an almost increasing function . We prove a theorem which provides conditions, in terms of some integral inequalities imposed on and , for such a boundedness. These conditions are sufficient in the general case, but we ...