Sökning: "elektromagnetisk modellering"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden elektromagnetisk modellering.

  1. 1. Sensitivity Analysis and Material Parameter Estimation using Electromagnetic Modelling

    Detta är en avhandling från Växjö, Kalmar : Linnaeus University Press

    Författare :Therese Sjödén; Sven Nordebo; Börje Nilsson; Margaret Cheney; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sensitivity analysis; material parameter; Fisher information; Cramér-Rao bound; electromagnetic modelling; grain angle; wood; electrical impedance tomography; inverse problems; känslighetsanalys; estimering; materialparameter; Fisher- information; Cramér-Rao-gränsen; elektromagnetisk modellering; fibervinkel; trä; elektrisk impedanstomografi; inversa problem; Waves and Signals; Vågor och signaler;

    Sammanfattning : Estimating parameters is the problem of finding their values from measurements and modelling. Parameters describe properties of a system; material, for instance, are defined by mechanical, electrical, and chemical parameters. Fisher information is an information measure, giving information about how changes in the parameter effect the estimation. LÄS MER

  2. 2. Electromagnetic Modelling for the Estimation of Wood Parameters

    Detta är en avhandling från Växjö : Matematiska och systemtekniska institutionen

    Författare :Therese Sjödén; Sven Nordebo; Börje Nilsson; Andreas Fhager; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cramér Rao bound; electromagnetic modelling; estimation; grain angle; microwave; wood properties.; Cramér Rao-gräns; elektromagnetisk modellering; estimering; fibervinkel; mikrovågor; träegenskaper.; TECHNOLOGY Engineering physics; TEKNIKVETENSKAP Teknisk fysik; Physics; Fysik;

    Sammanfattning : Spiral grain in trees causes trouble to the wood industry, since boards sawn from trees with large grain angle have severe problems with form stability. Measurements of the grain angle under bark enable the optimisation of the refining process. LÄS MER

  3. 3. Electromagnetic Modeling with Complex Dielectrics A Partial Element Equivalent Circuit Approach

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Andreas Hartman; Jonas Ekman; Jerker Delsing; Frank Gronwald; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

    Sammanfattning : Wireless communication systems have become an integral part of many complex systems in diverse areas of society, for the exchange of data in business and industrial settings. With the advent of Internet of Things (IoT) and wireless sensor network architectures, the tighter demands on interoperability between different devices are putting heavy requirements their ability to exchange data wirelessly among them reliably. LÄS MER

  4. 4. Mathematical Tools Applied in Computational Electromagnetics for a Biomedical Application and Antenna Analysis

    Detta är en avhandling från Luleå : Luleå University of Technology

    Författare :Farid Monsefi; Sergei Silvestrov; Magnus Otterskog; Linus Carlsson; Jean-Pierre Bérenger; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mathematics Applied Mathematics; matematik tillämpad matematik;

    Sammanfattning : To ensure a high level of safety and reliability of electronic/electric systems EMC (electromagnetic compatibility) tests together with computational techniques are used. In this thesis, mathematical modeling and computational electromagnetics are applied to mainly two case studies. LÄS MER

  5. 5. Model Developments to Study Some Aspects of Improving Efficiencies in EAF Plants

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Niloofar Arzpeyma; Mikael Ersson; Lauri Holappa; [2020]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The aim of this thesis is to investigate some aspects of improvements with respect to the energy consumption and raw material selection as well as the understanding of the influence of uncertainties on the performance in electric arc furnace (EAF) plants. The effect of electromagnetic stirring on the scrap melting and post combustion capacity are investigated in two EAFs by using computation fluid dynamic (CFD) models. LÄS MER