Sökning: "Helicopter"

Visar resultat 21 - 24 av 24 avhandlingar innehållade ordet Helicopter.

  1. 21. Active Control of Propeller-Induced Noise in Aircraft : Algorithms & Methods

    Författare :Sven Johansson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; active control of sound; active noise control; anc; actuator individual normalized filtered-x lms; filtered-x lms algorithm; newton algorithm; complex lms; multireference algorithm; leaky lms; control effort weighting; feedforward control; feedback contro;

    Sammanfattning : In the last decade acoustic noise has become more and more regarded as a problem. In cars, boats, trains and aircraft, low-frequency noise reduces comfort. Lightweight materials and more powerful engines are used in high-speed vehicles, resulting in a general increase in interior noise levels. LÄS MER

  3. 22. Demand for Rapid and Accurate Regional Medical Response at Major Incidents

    Författare :Heléne Nilsson; Tore Vikström; Carl‐Oscar Jonson; Michel Debacker; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : The ultimate goal in major incidents is to optimize care for the greatest number of patients. This means matching patients with facilities that have the appropriate resources available in sufficient quantities to provide the necessary care. A major incident is a situation where the available resources are inadequate in relation to the urgent need. LÄS MER

  4. 23. Detection and Depth Sounding of Small Targets with Airborne Laser Bathymetry

    Författare :Michael Tulldahl; Rainer Reuter; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The subject of this thesis is an investigation of the potential for detecting small targets (size about 1 m3) with airborne scanning laser depth sounding. Examples of other optical techniques of interest for small target detection are: range gated imaging, polarized detection and passive multispectral imaging. LÄS MER

  5. 24. Tools for design, interactive simulation, and visualization of object-oriented models in scientific computing

    Författare :Vadim Engelson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer science; Datavetenskap;

    Sammanfattning : Mathematical models used in scientific computing are becoming large and complex. In order to handle the size and complexity, the models should be better structured (using objectorientation) and visualized (using advanced user interfaces). Visualization is a difficult task, requiring a great deal of effort from scientific computing specialists. LÄS MER