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Visar resultat 1 - 5 av 8 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Optimizing multigrid smoothers using GLT theory

    Master-uppsats, Lunds universitet/Matematik LTH; Lunds universitet/Matematikcentrum

    Författare :Denhanh Huynh; [2020]
    Nyckelord :multigrid; smoothers; GLT; Mathematics and Statistics;

    Sammanfattning : Multigrid algorithms are algorithms used to find numerical solutions to differential equations using a hierarchy of grids of different coarseness. This exploits the fact that short-wavelength components of the solutions converges at a faster rate than the long-wavelength components when using some basic iterative methods, such as the Jacobi method or the Gauss-Seidel method. LÄS MER

  3. 2. Improvement of a Space Surveillance Tracking Analysis Tool

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Ismail Ugur Dundar; [2018]
    Nyckelord :;

    Sammanfattning : Since the beginning of space exploration, the amount of space debris has increased with thedevelopment of new space technologies. In fact, when a collision happens, new space debris aregenerated. Hence, collision risk between space debris and operational satellites rises. LÄS MER

  4. 3. Displacement Estimation for Homodyne Michelson Interferometers Based on Particle Filtering

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen för systemteknik

    Författare :Petter Ersbo; [2018]
    Nyckelord :interferometry; particle filter; state estimation;

    Sammanfattning : The current method for displacement estimation for homodyne Michelson interferometer is biased and gives little information about the statistical properties of the estimate. This thesis suggests an alternative estimation method, which has the potential to address these shortcomings. LÄS MER

  5. 4. Vehicle Speed Estimation for Articulated Heavy-Duty Vehicles

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Markus Rombach; [2018]
    Nyckelord :kalman; smoother; imu; estimation;

    Sammanfattning : Common trends in the vehicle industry are semiautonomous functions and autonomous solutions. This new type of functionality sets high requirements on the knowledge about the state of the vehicle. A precise vehicle speed is important for many functions, and one example is the positioning system which often is reliant on an accurate speed estimation. LÄS MER

  7. 5. Model based pulse shaping for detection of gamma rays

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Fredrik Ödmark; [2017]
    Nyckelord :pulse shaping; FWHM; CR-RC; electric noise model; analyse drill samples; gamma ray detector; matched filter; custom filter; clustering;

    Sammanfattning : To analyse drill samples in a mine, a scanner that uses a gamma ray detector can be used. The scanner can analyse the drill sample to quickly see the elements present in the sample without destroying it. LÄS MER