Sökning: "Time-series"

Visar resultat 41 - 45 av 1458 uppsatser innehållade ordet Time-series.

  1. 41. Jämförelse av datakomprimeringsalgoritmer för sensordata i motorstyrenheter

    M1-uppsats, KTH/Hälsoinformatik och logistik

    Författare :Malin Möller; Dominique Persson; [2023]
    Nyckelord :data compression; time-series data; embedded systems; engine control units; inverters; datakomprimering; tidsseriedata; inbyggda system; motorstyrenheter; växelriktare;

    Sammanfattning : Begränsad processor- och minneskapacitet är en stor utmaning för loggning avsensorsignaler i motorstyrenheter. För att kunna lagra större mängder data i dessakan komprimering användas. LÄS MER

  3. 42. A cross-correlation analysis of a warm super-Neptune using transit spectroscopy

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

    Författare :Elias Önerud; [2023]
    Nyckelord :Cross-correlation; cross-correlation spectroscopy; cross-correlation analysis; super-Neptune; astronomy; astrophysics; WASP-107; WASP-107 b; CRIRES ; SysRem; exoplanet; transmission spectrum; transit;

    Sammanfattning : A study was made in order to deduce whether certain chemical species, namely water (H2O) and carbon monoxide (CO), are present in the atmosphere of the exoplanet WASP-107 b, which lies about 200 light-years away from Earth in the constellation Virgo. The project was carried out at Uppsala University at the Department of Physics and Astronomy. LÄS MER

  4. 43. Robust Statistical Jump Models with Feature Selection

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Jonatan Persson; [2023]
    Nyckelord :Clustering; Jump; Feature selection; Robust; Mathematics and Statistics;

    Sammanfattning : A large area in statistics and machine learning is cluster analysis. This field of research concerns the design of algorithms that allow computers to automatically categorize a set of observations into different groups in a reasonable way, without any prior information about which observations belongs to which group. LÄS MER

  5. 44. On modelling OMXS30 stocks - comparison between ARMA models and neural networks

    Master-uppsats, Uppsala universitet/Matematiska institutionen

    Författare :Irina Zarankina; [2023]
    Nyckelord :ARMA; ARIMA; LSTM; time series; statistics;

    Sammanfattning : This thesis compares the results of the performance of the statistical Autoregressive integrated moving average (ARIMA) model and the neural network Long short-term model (LSTM) on a data set, which represents a market index. Both models are used to predict monthly, daily, and minute close prices of the OMX Stockholm 30 Index. LÄS MER

  7. 45. The Time-Varying Correlation between Regional Home Prices and The Impact of Central Bank Balance Sheet Policies on Home Prices : A Graphical Descriptive Statistics Approach on The US Housing Market

    Master-uppsats, KTH/Fastighetsföretagande och finansiella system

    Författare :Claudia Patricia Moros Martinez; [2023]
    Nyckelord :Quantitative easing; Quantitative tapering; Quantitative Research; Stock Prices; Real Estate; Central Banks; Federal Reserve; COVID-19; Kvantitativa lättnader; Kvantitativ nedtrappning; Kvantitativ forskning; Aktiekurser; Fastigheter; Centralbanker; Federal Reserve; COVID-19;

    Sammanfattning : There has been a growing interest in economic policies and their impact within a country among the real estate economics research community in recent years. After the economic crisis of 2008, an unconventional monetary policy was created, and it has been called quantitative easing (QE), an instrument of economic policy applied through central banks to boost the economy in periods when conventional monetary policy is not satisfactory. LÄS MER