Sökning: "geometric phase"

Visar resultat 1 - 5 av 26 uppsatser innehållade orden geometric phase.

  1. 1. Messing With The Gap: On The Modality Gap Phenomenon In Multimodal Contrastive Representation Learning

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Industriell teknik

    Författare :Mohammad Al-Jaff; [2023]
    Nyckelord :Multimodal machine learning; Representation learning; Self-supervised learning; contrastive learning; computer vision; computational biology; bioinformatics;

    Sammanfattning : In machine learning, a sub-field of computer science, a two-tower architecture model is a specialised type of neural network model that encodes paired data from different modalities (like text and images, sound and video, or proteomics and gene expression profiles) into a shared latent representation space. However, when training these models using a specific contrastive loss function, known as the multimodalinfoNCE loss, seems to often lead to a unique geometric phenomenon known as the modality gap. LÄS MER

  3. 2. Geometric Phases In Weak Measurements

    L3-uppsats, Uppsala universitet/Materialteori

    Författare :Isabela Dias; [2023]
    Nyckelord :Geometric phase; Weak measurements; Weak values;

    Sammanfattning : We explore a natural extension of the Abelian geometric phase factor in sequences of incomplete measurements to include high dimensional quantum states in the weak measurement scenario. To achieve the goal, we focus on sequential weak measurements of non-commuting projectors and combine the idea of weak measurements and the notion of a non-Abelian geometric phase. LÄS MER

  4. 3. Modelling Gas Flow Behaviour in Gas Atomizer

    Master-uppsats, KTH/Materialvetenskap

    Författare :Aravind Senan Vasanthasenan Reji; [2022]
    Nyckelord :Gas atomization; Nozzle; Velocity; Static pressure; Discrete phase model; Gasatomisering; Munstycke; Hastighet; Statiskt tryck; Diskret fasmodell;

    Sammanfattning : Gas atomization is regarded as a reliable method for creating high-quality metal powders from molten metal. The liquid metal is fed into the chamber as a free-falling stream through a nozzle, where it is impinged by high-velocity gas jets, causing degeneration and production of metal droplets, which solidify to create metal powders. LÄS MER

  5. 4. Classical motion in synthetic monopole fields

    Kandidat-uppsats, Uppsala universitet/Materialteori

    Författare :Ola Carlsson; [2022]
    Nyckelord :;

    Sammanfattning : In the Born-Oppenheimer approximation for a quantum system the emergent synthetic magnetic field can be seen as generated by monopoles at points of degeneracy, in full analogue to the synthetic fields generating the geometric phase of adiabatically evolving quantum systems. The plausibility of using these synthetic magnetic monopoles as a means to study magnetic monopole dynamics in the absence of fundamental magnetic monopoles has been explored. LÄS MER

  7. 5. Semi-Automatic calculation of the stability of shear walls in multi-storey buildings

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Avdelningen för Konstruktionsteknik

    Författare :Erik Bolin; Emil Sjöstedt; [2022]
    Nyckelord :Horizontal stabilisation; Dynamo; Shear walls; Stability; Conceptual design phase; Visual programming; Openings in shear walls; Load distribution; Relative stiffness; Technology and Engineering;

    Sammanfattning : Performing horizontal stability analysis in the conceptual design phase is time consuming and adjustments in the geometry of the building require new time consuming calculations. Often buildings are modelled in 3D modelling software such as Revit and Tekla but the calculations are often performed in a separate software. LÄS MER