Sökning: "Magnetisk resonans"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden Magnetisk resonans.

  1. 1. Design and construction of a reliable wireless power transfer system for an embedded device : With emphasis on industrial applications

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Dhruvi Ajit Shukla; [2022]
    Nyckelord :Wireless Power Transfer WPT ; ferrites; Litz wire; skin effect; proximity effect; electromagnetic induction; electromagnetic resonance; magnetic coupling; power efficiency; LC circuits; Trådlös kraftöverföring WPT ; ferrit; litz-tråd; hudeffekt; närhetseffekt; elektromagnetisk induktion; elektromagnetisk resonans; magnetisk koppling; effekteffektivitet; LC-kretsar;

    Sammanfattning : This thesis deals with wireless power transfer from an external source to embedded small devices (such as for conditioning monitoring, control etc.) located at different distances from the source. The proposed designs can be used in a variety of applications, including mobile phones, electric cars, unmanned aerial vehicles, robots, etc. LÄS MER

  3. 2. Designing k-Space Filters to Improve Spatiotemporal Resolution with Sector-Wise Golden Angle (SWIG)

    Master-uppsats, KTH/Medicinteknik och hälsosystem

    Författare :Jonas Ström Seez; [2022]
    Nyckelord :Cardiovascular Magnetic Resonance Imaging CMR ; k-Space Filter; Sector Wise Golden-angle SWIG ; Kardiovaskulär Magnetisk Resonans Tomografi CMR ; k-rumsfilter; Sektorsvis Gyllene Vinkel SWIG ;

    Sammanfattning : The aim of this thesis is to design and evaluate k-space weighting filters for simultaneously improving the spatial and temporal resolution of cardiovascular MRI, with the ultimate goal of improving the accuracy of quantitative flow measurements, which are important for diagnosis and follow-up of heart dysfunction. Two different k-space filters were implemented and evaluated retrospectively to already acquired data. LÄS MER

  4. 3. Magnetically tunable microwave resonator/filter

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Zhi Ye; [2022]
    Nyckelord :Magnetic tuning; Ferrite; Substrate integrated waveguide resonator; Substrate integrated waveguide filter; Magnetisk inställning; Ferrit; Substratintegrerad vågledarresonator; Substratintegrerad vågledarfilter;

    Sammanfattning : The magnetic tunability of ferrites has been studied and applied on many electric components for working in various frequency bands. Filters or resonators loaded by ferrites can thus work for different frequency requirements by tunning external biasing field. However, filters or resonators built by traditional waveguides are large in size. LÄS MER

  5. 4. Electromagnetic Phase Engineering With Metamaterials

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Olof Sjödin; [2021]
    Nyckelord :Applied Physics; Electromagnetism; Metamaterials; MIM; Plasmonics; FEM; Reflector design; Phase engineering; Tillämpad fysik; Elektromagnetism; Metamaterial; MIM; Plasmonics; FEM; Reflektor design; Fasdesign;

    Sammanfattning : Metamaterials are artificially designed materials with desired electromagneticresponses for advanced wave manipulation. Their key constituent is often somenoble metal, thanks to its well localized plasmonic effects with highextinction cross section. LÄS MER

  7. 5. Advanced tractography methods: Applied to patients with carpal tunnel syndrome

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Tobias Rosholm; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Introduction: Carpal tunnel syndrome (CTS) is a common condition especially for people with diabetes, obesity or women who are pregnant. Diagnosing CTS has primarily been performed using electroneuronography. LÄS MER