Sökning: "Isotropi"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet Isotropi.

  1. 1. Fibre volume fractions’ and printing directions’ effects on tribological and mechanical properties in FDM printed carbon fibre reinforced PEEK : Suitability assessment of FDM printed PEEK-CF to act in a steam engine’s ball joint, by analysis of compressive properties, impact strength, friction and wear

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :William Tönnberg; [2022]
    Nyckelord :Ranotor; steam engine; PEEK; polyether-ether-ketone; carbon fibre reinforced PEEK; impact strength; compressive strength; compressive modulus; friction; wear; tribology; FFF; FDM; 3D-printing; printing parameters;

    Sammanfattning : The purpose with this study was to investigate FDM/FFF manufactured carbon fibre reinforced PEEK and assess its suitability to act as a sealing- and bearing material in a modern steam engine’s ball joint. The steam engine is totally free from oil due to the risk of water- and steam contamination. LÄS MER

  3. 2. Simulations of anisotropic vibrations in ice induced by a laser

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Victor Freedman; [2022]
    Nyckelord :ice; anisotropy; laser; freedman; molecular dynamics; simulations;

    Sammanfattning : Systems of atoms have their kinetic energy distributed between three parts: translation, rotation and vibration. These are usually kept about the same following a Maxwell distribution, but under certain circumstances, this equilibrium might break. This would lead to, for example, ice melting anisotropically. LÄS MER

  4. 3. Optimizing the Performance of Text Classification Models by Improving the Isotropy of the Embeddings using a Joint Loss Function

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

    Författare :Joseph Attieh; [2022]
    Nyckelord :Text Classification; Isotropy; Embeddings; BERT; IsoScore; Klassificering av Text; Isotropi; Inbäddningar; BERT; IsoScore;

    Sammanfattning : Recent studies show that the spatial distribution of the sentence representations generated from pre-trained language models is highly anisotropic, meaning that the representations are not uniformly distributed among the directions of the embedding space. Thus, the expressiveness of the embedding space is limited, as the embeddings are less distinguishable and less diverse. LÄS MER

  5. 4. Simple cosmological models and their descriptions of the universe

    Kandidat-uppsats, Linköpings universitet/Matematik och tillämpad matematik

    Författare :Emil Gustafsson; [2018]
    Nyckelord :Tensors; General relativity; Einstein s field equations; Cosmology; Friedmann s equation; FLRW-spacetimes; Tensorer; Allmän relativitetsteori; Einsteins fältekvationer; Kosmologi; Friedmanns ekvation; FLRW-rumtider;

    Sammanfattning : Cosmology is the study of the universe as a whole, and attempts to describe the behaviour of the universe mathematically. The simplest relativistic cosmological models are derived from Einstein's field equations with the assumptions of isotropy and homogeneity. LÄS MER

  7. 5. Deformationsstrukturer i ett duplext rostfritt stål (SAF 2507)

    Kandidat-uppsats, Högskolan Dalarna/Materialteknik

    Författare :Adam Ljungberg; Nathalie Schmidt; [2014]
    Nyckelord :Duplex stainless steel; deformation properties; anisotropy; isotropy; texture; Duplext rostfritt stål; deformationsegenskaper; anisotropi; isotropi; textur;

    Sammanfattning : För att kunna förbättra processer och användning av det duplexa rostfria stålet SAF 2507 måste dess deformationsegenskaper undersökas och förklaras. Genom EBSD-analyser har deformationsstrukturer och polfgurer tagits fram för att kunna beskriva materialets beteende vid deformation. LÄS MER