Sökning: "Diskreta element"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden Diskreta element.

  1. 1. Evaluation of load distribution on ballasted reinforced concrete railway trough bridges

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Byggkonstruktion och brand

    Författare :Alex Eriksson; [2023]
    Nyckelord :Concrete; numerical analysis; trough bridge; railway bridge; finite element model; discrete element method; Betong; numeriskanalys; trågbro; tågbro; finita elementmetoden; diskreta elementmetoden;

    Sammanfattning : A significant portion of the reinforced concrete railway bridges in Sweden are reaching their designed lifespan and are scheduled to be demolished and replaced in the upcoming years. To limit the econom-icand environmental impact related to the replacement of existing railway infrastructure, a comprehen-siveevaluation of their capacity is required with the aim of extending its lifespan. LÄS MER

  3. 2. Modulation of the optical properties of quantum dots by surface acoustic waves

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Tanguy Schetelat; [2023]
    Nyckelord :Nanophotonics; Quantum dots; Surface acoustic waves; Interdigital tansducers; Optomechanical coupling; Nanofotonik; Kvantprickar; Akustika yt-vågor; Interdigital tansducers; Optomekanisk koppling;

    Sammanfattning : Semiconductor quantum dots (QDs) are considered to be a crucial part of future quantum technologies due to their enormous potential as efficient sources of single and indistinguishable photons. Single photons are necessary to transport quantum information over large distances through the existing global fibre optic network. LÄS MER

  4. 3. Numeriska fouriertransformen och dess användning : En introduktion

    Kandidat-uppsats, Linköpings universitet/Tillämpad matematik; Linköpings universitet/Tekniska fakulteten

    Författare :Kristoffer Tondel; [2022]
    Nyckelord :Fast Fourier Transform; FFT; Discrete Fourier transform; DFT; Scientific Computing; Partial differential equation; PDE; Williamsons Runga-Kutta; Fast Fourier Transform; FFT; Diskreta fouriertransformen; DFT; Beräkningsmatematik; Partiella differential ekvation; PDE; Williamsons Runga-Kutta;

    Sammanfattning : The aim of this bachelor's thesis is to use three variants of the discrete Fourier transform (DFT) and compare their computational cost. The transformation will be used to numerically solve partial differential equations (PDE). In its simplest form, the DFT can be regarded as a matrix multiplication. LÄS MER

  5. 4. Berättelser från ett kulturlandskap : ett gestaltningsförslag för Nikkaluokta turistanläggnings utemiljö

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Urban and Rural Development

    Författare :Alexander Morell; [2022]
    Nyckelord :Landskapsnarrativ; fjällen; kulturlandskap; Sápmi; samisk arkitektur;

    Sammanfattning : Samernas traditionella marker, Sápmi, har en lång historia av kolonialism och förtryck. I bygget av den svenska nationella identitet har fjällen ofta porträtterats som en orörd natur, vars storslagenhet symboliserade nationens storhet. LÄS MER

  7. 5. Performance Evaluation of a High Temperature Borehole Thermal Energy Storage Under Influence of Groundwater Flow

    Master-uppsats, KTH/Energiteknik

    Författare :Max Hesselbrandt; [2021]
    Nyckelord :;

    Sammanfattning : Recent years have seen a growing interest in large-scale high-temperature borehole thermal energy storage (HT-BTES) as a means to store industrial waste heat and solar energy between the seasons. A profound understanding and characterization of the thermal and hydraulic processes involved in such systems is required for the optimal design as well as for environmental assessments of the storage. LÄS MER