Sökning: "Urban Canyons"

Visar resultat 6 - 10 av 14 uppsatser innehållade orden Urban Canyons.

  1. 6. 5G Positioning using Machine Learning

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Magnus Malmström; [2018]
    Nyckelord :5G; Positioning; Non Line of Sight NLOS ; Urban Canyons; Machine Learning; Neural Networks; Random Forest; Detection; Neyman-Person; Generalized Likelihood Ratio Test; Kalam Filter;

    Sammanfattning : Positioning is recognized as an important feature of fifth generation (\abbrFiveG) cellular networks due to the massive number of commercial use cases that would benefit from access to position information. Radio based positioning has always been a challenging task in urban canyons where buildings block and reflect the radio signal, causing multipath propagation and non-line-of-sight (NLOS) signal conditions. LÄS MER

  3. 7. Wind Unwind

    Master-uppsats, Lunds universitet/Institutionen för arkitektur och byggd miljö

    Författare :Maëlle Ducreux; [2017]
    Nyckelord :wind; microclimate; design; energy; waterfront; turbines; sustainable; Arts and Architecture;

    Sammanfattning : Wind turbines are most commonly located in remote areas to harness strong and constant winds, however, with the current growing rate of urbanisation, producing clean energy within the city closer to consumers is becoming crucial. Research has shown that the urban morphology has a strong capacity to influence air flow and ‘street canyons’ have the potential to channel the wind towards turbines in the urban scale. LÄS MER

  4. 8. Vegetationens inverkan på det urbana klimatet : en studie om trädens effekt på en gatukanjonen i Malmö

    Master-uppsats, SLU/Dept. of People and Society

    Författare :Linnea Saarela; [2016]
    Nyckelord :urbant lokalklimat; värmeö; klimatanpassning; mikroklimat; albedo; urban grönstruktur; evapotranspiration; termisk komfort;

    Sammanfattning : Fysisk planering i Sverige har sedan länge inneburit att anpassa våra städer för ett kallt klimat. De pågående klimatförändringarna kommer dock kräva att den fysiska planeringen även omfattas av en anpassning för ett varmt sommarhalvårsklimat, där förekomsten av extrema väderhändelser kan komma att öka. LÄS MER

  5. 9. Mass conservative network model for convective net flow in a complex urban geometry

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Linus Olofsson; [2016]
    Nyckelord :Network model; Street canyons; Intersections; Urban dispersion; CFD data; CFD simulations; Atmospheric exchange;

    Sammanfattning : When simulating air flows in an urban environment, for e.g. pollutant dispersion investigations, today's main tool is advanced computational fluid dynamics simulations. These simulations take a lot of time and resources to perform, even for small geometries. LÄS MER

  7. 10. Modelling near ground wind speed in urban environments using high-resolution digital surface models and statistical methods

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Lars Johansson; [2012]
    Nyckelord :Geographic Information System; spatial variability; GIS; digital surface model; wind speed; urban geometry; geomatics; geography; urban climate; physical geography; geografi; naturgeografi; geomatik; stadsklimat; bebyggelsegeometri; vindhastighet; digital höjdmodell; rumslig variation; geografiska informationssystem; Earth and Environmental Sciences;

    Sammanfattning : Wind is a complex phenomenon and a critical factor in assessing climatic conditions and pedestrian comfort within cities. This master’s thesis attempts to quantify and model the relationship between near ground wind speed and urban geometry using two-dimensional raster data and variable selection methods based on Multiple Linear Regression. LÄS MER