Viser treff 281-300 av 926

    • Synaptus: A Matlab/Octave toolbox for synthetic aperture ultrasound imaging. 

      Skjelvareid, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-08)
      Underlying patterns and factors behind suicides of patients in treatment are still unclear and there is a pressing need for more studies to address this knowledge gap. We analysed 278 cases of suicide reported to The Norwegian System of Patient Injury Compensation, drawing on anonymised data, i.e., age group, gender, diagnostic category, type of treatment provided, inpatient vs. outpatient status, ...
    • Comparison of Deep Learning Models for the Classification of Noctilucent Cloud Images 

      Sapkota, Rajendra; Sharma, Puneet; Mann, Ingrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-10)
      Optically thin layers of tiny ice particles near the summer mesopause, known as noctilucent clouds, are of significant interest within the aeronomy and climate science communities. Groundbased optical cameras mounted at various locations in the arctic regions collect the dataset during favorable summer times. In this paper, first, we compare the performances of various deep learningbased image ...
    • Continuous refinements of some Jensen-type inequalities via strong convexity with applications 

      Nikolova, Ludmila; Persson, Lars-Erik; Varošanec, Sanja (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-23)
      In this paper we prove new continuous refinements of some Jensen type inequalities in both direct and reversed forms. As applications we also derive some continuous refinements of Hermite–Hadamard, Hölder, and Popoviciu type inequalities. As particular cases we point out the corresponding results for sums and integrals showing that our results contain both several well-known but also some new ...
    • Comparison of “Zero Emission” Vehicles with Petrol and Hybrid Cars in Terms of Total CO2 Release—A Case Study for Romania, Poland, Norway and Germany 

      Lieutenant, Klaus; Borissova, Ana Vassileva; Mustafa, Mohamad; McCarthy, Nick; Iordache, Ioan (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-27)
      The authors compare the energy consumption and CO<sub>2</sub> emissions from vehicles using internal combustion engines (ICE), battery electric vehicles (BEV), fuel cell electric vehicles (FCEV), and two types of hybrid vehicles, BEV‐ICE hybrid and BEV‐FCEV hybrid. This paper considers several scenarios for four countries’ electricity production from primary energy sources to estimate total ...
    • A Field Programmable and Dynamic Configurable Power Electronic Converter Concept 

      Hoff, Bjarte (Chapter; Bokkapittel, 2022)
      This paper proposes the concept of a field programmable and configurable power electronic converter together with a new synthesis method. By considering the converter as a pack of resources, the converter topology and configuration of inputs and outputs can be programmed in the field through, utilising the available device resources.
    • 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 ...
    • Cascade-Based Controlled Attitude Synchronization and Tracking of Spacecraft in Leader-Follower Formation 

      Schlanbusch, Rune; Loria, Antonio; Nicklasson, Per Johan (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-05-05)
      We propose controllers for leader-follower attitude synchronization of spacecraft formations in the presence of disturbances, that is, the leader spacecraft is controlled to follow a given reference, while a follower spacecraft is controlled to synchronize its motion with the leader’s. In the ideal disturbance-free scenario, we show that synchronization takes place asymptotically. Moreover, we ...
    • Conformal Transformation Analysis of Capacitive Wireless Charging 

      Al-Sallami, Hussein Mahdi Yaseen; Hoff, Bjarte; Ellingsen, Pål Gunnar; Østrem, Trond (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-30)
      This paper studies the capacitive coupling in a capacitive power transfer (CPT) system designed for charging applications. It proposes mathematical models using the conformal transformation for calculating air-gapped and underwater capacitance and verifies the proposed models using COMSOL multiphysics and measurements. The measured results show that we can achieve nano-farad capacitance ranges ...
    • Multiphysics Perspective of Microspray 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022-09-22)
    • Finite Element Analysis to determine the impact of Infill density on Mechanical Properties of 3D Printed Materials 

      Andleeb, Zahra; Khawaja, Hassan; Andersen, Kristian; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-29)
      Additive manufacturing (AM) is the process in which objects are created through the layer-by-layer deposition of material that is controlled by a computer. The infill is the internal structure of the 3D printed model. It determines the strength, weight, cost, time, and overall quality of the part. Ranging from simple lines to more complex geometric shapes, infill patterns can affect a part's ...
    • Some new iterated Hardy-type inequalities: the case theta=1 

      Gogatishvili, Amiran; Mustafayev, Rza; Persson, Lars Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-11-08)
      In this paper we characterize the validity of the Hardy-type inequality &#8741 &#8741 &#8747 <sub>s</sub>&#8734) h(z)dz &#8741 p,u,(0,t) &#8741 q,w,(=,&#8734≤ c&#8741h&#8741 1,v(0,&#8734) where 0 < p < ∞,0< q ≤ +∞, u, w and v are weight functions on (0,∞). It is pointed out that this characterization can be used to obtain new characterizations for the boundedness between weighted Lebesgue spaces ...
    • Homogenization of a singular random one-dimensional PDE with time-varying coefficients 

      Pardoux, Etienne; Piatnitski, Andrey (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-05-04)
      In this paper we study the homogenization of a nonautonomous parabolic equation with a large random rapidly oscillating potential in the case of one-dimensional spatial variable. We show that if the potential is a statistically homogeneous rapidly oscillating function of both temporal and spatial variables, then, under proper mixing assumptions, the limit equation is deterministic, and convergence ...
    • 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 ...
    • A Decision-Support Framework for Smart and Sustainable Reverse Logistics Network Design 

      Sun, Xu (Doctoral thesis; Doktorgradsavhandling, 2022-10-06)
      The Fourth Industrial Revolution, namely Industry 4.0, has provided opportunities for digitalization and paradigm shifts in many industries and business sectors. Reverse logistics is currently being increasingly focused on by worldwide companies and governments due to the pressure on sustainable development and circular economy. Through the gradual but steady adoption of several disruptive ...
    • Addressing Uncertainty by Designing an Intelligent Fuzzy System to Help Decision Support Systems for Winter Road Maintenance 

      Hatamzad, Mahshid; Polanco Pinerez, Geanette Cleotilde; Casselgren, Johan (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-17)
      One of the main challenges in developing efficient and effective winter road maintenance is to design an accurate prediction model for the road surface friction coefficient. A reliable and accurate prediction model of road surface friction coefficient can help decision support systems to significantly increase traffic safety, while saving time and cost. High dynamicity in weather and road surface ...
    • Roach Infestation Optimization MPPT Algorithm for Solar Photovoltaic System 

      Calay, Rajnish K; Pradhan, Chittaranjan; Senapati, Manoj Kumar; Ntiakoh, Nicholas Kakra (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-16)
      Solar photovoltaic (PV) power has several advantages such as free availability, absence of rotating parts, can be easily integrated with building architecture, and need little maintenance. However, the PV cell current–voltage (I–V) characteristics are non-linear and power generated from a PV array depends on solar insolation/irradiation and panel temperature. The extracted PV output power is ...
    • Measuring Cold Exposure 

      Khawaja, Hassan (Conference object; Konferansebidrag, 2022-08-22)
    • Isogeometric analysis using a tensor product blending spline construction 

      Kravetc, Tatiana (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-01)
      In this paper, we introduce a blending spline type construction into the isogeometric analysis. We consider a general algorithm for solving a number of boundary value problems, including heat equation, wave equation, linear elasticity, etc. The usage of blending spline construction in the isogeometric context mixes standard finite element and NURBS-based approaches while accumulating the benefits ...
    • Experiments on turbulence from colliding ice floes 

      Løken, Trygve Kvåle; Marchenko, Aleksey; Ellevold, Thea Josefine; Rabault, Jean; Jensen, Atle (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-16)
      Increased knowledge about energy dissipation processes around colliding ice floes is important for improved understanding of atmosphere-ice-ocean energy transfer, wave propagation through sea ice, and the polar climates. The aim of this study is to obtain such information by investigating colliding ice floe dynamics in a large-scale experiment and directly measuring and quantifying the turbulent ...
    • Cost-related analysis of implementing energy-efficient retrofit measures in the residential building sector of a middle-income country – A case study of Bosnia and Herzegovina 

      Kadrić, Džana; Aganovic, Amar; Martinović, Sandra; Delalić, Nijaz; Delalić-Gurda, Berina (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-15)
      This study presents an in-depth analysis of the cost structure when planning EE retrofit measures in the residential sector in Bosnia and Herzegovina. The analysis showed that implementing EE retrofit measures would result in substantial energy savings in single-family houses, however, the specific cost of implementing EE retrofit measures per resident for single-family houses is on average 2.8 ...