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Visar resultat 1 - 5 av 13 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Gravity water waves over constant vorticity flows: from laminar flows to touching waves

    Master-uppsats, Lunds universitet/Matematik (naturvetenskapliga fakulteten); Lunds universitet/Matematikcentrum

    Författare :Francisco Gonçalves Jorge Dias de Carvalho; [2023]
    Nyckelord :Partial differential equations; Water waves; Euler equations; Free boundary problem; Bifurcation theory; Nonlinear functional analysis; Hilbert transform; Mathematics and Statistics;

    Sammanfattning : In a recent paper, Hur and Wheeler proved the existence of periodic steady water waves over an infinitely deep, two-dimensional and constant vorticity flow and subject to gravity whose profile overhangs, among which, waves whose surface touches at a point, enclosing a bubble of air. We take this further, proving the existence of a continuous curve of water waves from a laminar flow up to a touching wave for fixed non-zero gravity. LÄS MER

  3. 2. Automatised detection of sources for power curve deviations of horizontal axis wind turbines

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Marius Walter; [2022]
    Nyckelord :Wind Power; Automation; Power Curve; SCADA; Predictive Maintenance;

    Sammanfattning : To face climate change and transform the electricity supply to an environmentally friendly generation, wind plays an important role. Due to a yearly increase in installed wind power turbines, in the European Union, the need for maintenance increases as well. LÄS MER

  4. 3. Mescape - A probabilistic mesoscopic model for fire evacuation in large gatherings

    Master-uppsats, Lunds universitet/Avdelningen för Brandteknik

    Författare :Lorenzo Contini; [2022]
    Nyckelord :Human behaviour; crowd evacuation; mesoscopic modelling; hydraulic model; large gatherings; fire safety; performance-based design; quantitative risk assessment; consequence analysis; uncertainty analysis; probabilistic modelling; Technology and Engineering;

    Sammanfattning : This study presents a mesoscopic model that predicts pedestrian evacuation in large gatherings with probabilistic methods. The model is based on a coarse network representation of buildings, where occupants are treated at a different scale according to their location. LÄS MER

  5. 4. Numerisk modellering av deformationer och portryck i en experimentdamm : Jämförelse mellan in-situmätningar och FE-simuleringar i PLAXIS 2D

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Adam Sjödin; [2021]
    Nyckelord :Fully-coupled flow deformation; Embankment dam; Hardening Soil; Unsaturated conditions; Optimisation; PLAXIS; SoilTest; Triaxial test; van Genuchten; Soil-water characteristic curve; Soil-water retention curve; Saturation; Flödes-deformationsanalys; Fyllningsdamm; Hardening Soil; Omättade förhållanden; Optimering; PLAXIS; SoilTest; Triaxialförsök; van Genuchten; Vattenbindningskurva; Vattenmättnad;

    Sammanfattning : Under hösten 2019 har Vattenfall Research & Development byggt en experimentell jordfyllningsdamm i Älvkarleby med dimensionerna 20x15x4 meter. Delar av experimentdammen är konventionellt konstruerade och har installerats med geoteknisk utrustning som utgörs av bland annat inklinometrar och portrycksgivare. LÄS MER

  7. 5. Volatility Curves of Incomplete Markets

    Master-uppsats, Göteborgs universitet/Institutionen för matematiska vetenskaper

    Författare :Kateryna Chechelnytska; [2020-06-23]
    Nyckelord :Implied volatility; Incomplete markets; Trinomial option pricing model; Black-Scholes option pricing model; Risk-neutral probability;

    Sammanfattning : The graph of the implied volatility of call options as a function of the strike price is called volatility curve. If the options market were perfectly described by the Black-Scholes model, the implied volatility would be independent of the strike price and thus the volatility curve would be a at horizontal line. LÄS MER