Sökning: "detrending"

Visar resultat 1 - 5 av 10 uppsatser innehållade ordet detrending.

  1. 1. Predicting Quality of Experience from Performance Indicators : Modelling aggregated user survey responses based on telecommunications networks performance indicators

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

    Författare :Christian Vestergaard; [2022]
    Nyckelord :Quality of Experience; Telecommunication; Regression; Long Short Term Memmory; Clustering; K-means; Gaussian Mixture Models; Användarupplevelse; Telekommunikation; Regression; Long Short Term Memmory; Klusteranalys; K-means; Gaussian Mixture Models;

    Sammanfattning : As user experience can be a competitive edge, it lies in the interest of businesses to be aware of how users perceive the services they provide. For telecommunications operators, how network performance influences user experience is critical. To attain this knowledge, one can survey users. LÄS MER

  3. 2. Using blue light reflectance from high-resolution images (6000 dpi) of Scots pine tree rings to reconstruct three centuries of Scottish summer temperatures

    Kandidat-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Alice De Schutter; Karin Markendahl; [2021]
    Nyckelord :summer temperature reconstruction; climate change; Scotland; Scots pines; ultra-high image resolution; blue intensity; rekonstruktion av sommartemperatur; klimatförändringar; Skottland; skotska tallar; hög bildupplösning; blå intensitet;

    Sammanfattning : Advances in scanner technology have made it possible to obtain high resolution (6000 dpi) images of tree samples. Due to the images’ increased capability of resolving anatomical wood structures, the new technology could be of benefit to dendroclimatology.  This study attempts to expand on Rydval et al. LÄS MER

  4. 3. Evaluation of Homogeneity in Drug Seizures Using Near-Infrared (NIR) Hyperspectral Imaging and Principal Component Analysis (PCA)

    Kandidat-uppsats, Linköpings universitet/Kemi

    Författare :Olle Strindlund; [2020]
    Nyckelord :Homogeneity; drug seizures; pharmaceuticals; NIR hyperspectral imaging; chemometrics; PCA;

    Sammanfattning : The selection of a representative sample is a delicate problem when drug seizures comprised of large number of units arrive at the Swedish National Forensic Centre (NFC). If deviating objects in the selected sample size are found, additional analyzes are required to investigate how representative the results are for the entire population. LÄS MER

  5. 4. A study on the quality of the NKG2015 geoid model over the Nordic countries

    Uppsats för yrkesexamina på grundnivå, Högskolan Väst/Avdelningen för Matematik, Data- och Lantmäteriteknik

    Författare :Jenny Berntsson; [2019]
    Nyckelord :Geodesi; modell; kvalitet;

    Sammanfattning : Geoidmodellen NKG2015 (Nordiska kommissionen för geodesi) är den senaste geoidmodellen över Norden. Det har inte publicerats någon forskning om kvaliteten på den här nya modellen, därför kan den här studien bidra till forskningen inom ämnet. LÄS MER

  7. 5. Data processing of Controlled Source Audio Magnetotelluric (CSAMT) Data

    Kandidat-uppsats, Uppsala universitet/Geofysik

    Författare :Oskar Rydman; [2019]
    Nyckelord :CSAMT; detrending; coherency; transients; time series; processing; CSAMT; detrending; koherens; transienter; tidserier; processering;

    Sammanfattning : During this project three distinct methods to improve the data processing of Controlled Source Audio Magnetotellurics (CSAMT) data are implemented and their advantages and disadvantages are discussed. The methods in question are: Detrending the time series in the time domain, instead of detrending in the frequencydomain. LÄS MER