Sökning: "noise measurement"

Visar resultat 1 - 5 av 318 avhandlingar innehållade orden noise measurement.

  1. 1. Development and Application of Reactor Noise Diagnostics

    Författare :Joakim K.-H. Karlsson; [1999]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BWR stability; noise decomposition; reactor noise; control rod vibrations; core barrel vibration; density wave oscillations; noise diagnostics; PWR noise; localisation; channel instability;

    Sammanfattning : A number of problems in reactor noise diagnostics have been investigated within the framework of the present thesis. The six papers presented cover three relatively different areas, namely the use of analytical calculations of the neutron noise in simple reactor models, some aspects of boiling water reactor (BWR) stability and diagnostics of core barrel motion in pressurized water reactors (PWRs). LÄS MER

  2. 2. Noise from wind turbines

    Detta är en avhandling från Stockholm : Institutionen för byggnader och installationer

    Författare :Olivier Fégeant; [2001]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; masking; vibration transmission; diffraction; ambient noise; pseudo-noise; cylindrical shell. Perturbation methods; structural mobility; axoustic outdoor measurement; TECHNOLOGY Civil engineering and architecture Building engineering; TEKNIKVETENSKAP Samhällsbyggnadsteknik och arkitektur Byggnadsteknik;

    Sammanfattning : A rapid growth of installed wind power capacity is expectedin the next few years. However, the siting of wind turbines ona large scale raises concerns about their environmental impact,notably with respect to noise. LÄS MER

  3. 3. Classroom noise exposure and subjective response among pupils

    Detta är en avhandling från Stockholm : Institutionen för byggnader och installationer

    Författare :Pär Lundquist; Rauno Pääkkönen; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; school; teaching; students; annoyance children; sound; mood;

    Sammanfattning : In Sweden, all children must have access to education of equal value and the curriculum points out the importance of a good environment for development and learning. Modern working methods differ a lot from the traditional. Teaching nowadays is focused on problem-solving. Students are more interactive, working in groups and projects. LÄS MER

  4. 4. Flow Pulsations in Fluid Power Machines - a Measurement and Simulation Study

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :Liselott Ericson; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; noise; pump; motor; measurement; optimisation; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Stricter requirements for better working environment involve noise and vibration control of hydraulic machines. The operational conditions for hydraulic machines, such as pressure and rotational speed, are also increasing and this makes it even more difficult to develop a quiet, vibration-free machine due to the interdependence between noise and escalating operational conditions. LÄS MER

  5. 5. Cryogenic low noise amplifiers for microwave frequencies

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :Jianguo Xu; [1995]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MODFET; cryogenic; millimeter-wave; low-noise amplifier; FET noise model; microwave; TEGFET; HEMT; noise measurement; HFET; computer-aided design;

    Sammanfattning : .... LÄS MER