Sökning: "Euler Lagrange equations"

Hittade 5 uppsatser innehållade orden Euler Lagrange equations.

  1. 1. Calculating scattering amplitudes in φ3 and Yang-mills theory using perturbiner methods

    L3-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Daniel Nilsson; Magnus Bertilsson; [2022]
    Nyckelord :QFT; Quantum; Quantum field theory; scattering amplitudes; Berends Giele Currents; feynman diagrams; n particle scattering;

    Sammanfattning : We calculate tree-level scattering amplitudes in φ^3 theory and Yang-Mills theory by means of the perturbiner expansion. This involves solving the Euler-Lagrange equations of motion perturbatively via a multi-particle ansatz, and using Berends-Giele recursion relations to extract the solution from simple on-shell data. LÄS MER

  3. 2. Development and Implementation of a Mass Balancing System for CubeSat Attitude Hardware-in-the-Loop Simulations

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Guillermo Ledo López; [2019]
    Nyckelord :hil; hardware in the loop; simulation; satellite; simulator; platform; simulink; matlab; least squares; aocs; testing; attitude; dynamics; control;

    Sammanfattning : Spacecraft simulator platforms can simulate the microgravity environment of space on Earth, for the purposes of testing the Attitude and Orbit Control Subsystem of satellites. In order to do this, the satellite is mounted on a bench and the combined center of mass of this assembly is controlled by a series of moving masses. LÄS MER

  4. 3. Vessel segmentation for time resolved phase contrast MRI

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Sebastian Bidhult; [2013]
    Nyckelord :Medical image analysis; Active contours; Euler Lagrange equations; Expectation Maximization algorithm.; Mathematics and Statistics;

    Sammanfattning : Quantication of cardiovascular flow and blood volumes are useful tools in diagnosing cardiovascular disease such as congenital heart defects and different kinds of valve leakage. Medical imaging techniques enables non-invasive analysis of anatomy and physiology. LÄS MER

  5. 4. Holonomic versus nonholonomic constraints

    Kandidat-uppsats, Avdelningen för fysik och elektroteknik

    Författare :Mattias Flygare; [2012]
    Nyckelord :analytical mechanics; classical mechanics; lagrangian; d alembert s principle; hamilton s principle; holonomic; nonholonomic; constraints; differential geometry; fibre bundle; curvature; falling disc;

    Sammanfattning : Courses in analytical mechanics for undergraduate students are often limited to treatment of holonomic constraints, which are constraints on coordinates. The concept of nonholonomic constraints, constraints on velocities, is usually only mentioned briefly and it is easy to get a wrongful idea of what they are and how to treat them. LÄS MER

  7. 5. Super-Helices for Hair Modeling and Dynamics

    Magister-uppsats, Institutionen för teknik och naturvetenskap

    Författare :Mattias Bergbom; [2007]
    Nyckelord :hair modeling simulation;

    Sammanfattning : We present core components of a hair modeling and dynamics solution for the feature film industry. Recent research results in hair simulation are exploited as a dynamics model based on solving the Euler-Lagrange equations of motion for a discretized Cosserat curve is implemented in its entirety. LÄS MER