Sökning: "natural frequency analysis"

Visar resultat 11 - 15 av 327 avhandlingar innehållade orden natural frequency analysis.

  1. 11. A Virtual Design Studio for Low-Frequency Sound from Walking in Lightweight Buildings

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Nata Amiryarahmadi; [2019]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lightweight floors; Walking sound; Low frequency; Annoyance; Virtual design studio;

    Sammanfattning : In recent years there has been a growing interest for building lightweight multistorey wooden residential buildings in countries like Sweden with large and renewable forests. While positive aspects of these buildings, such as sustainability, ease of construction and lightness, motivate building more in wood, poor acoustic performance is a risk which concerns the wooden-building industry. LÄS MER

  2. 12. Wavelet and gabor frames and bases approximation, sampling and applications

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Niklas Grip; Luleå tekniska universitet.; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : This thesis is devoted to both theoretical and practical aspects of applied mathematics. It consists of three main parts: Part I consists of an application-oriented introduction to the theory of frames and bases for separable Hilbert spaces, as well as an introduction to the main tools used in the remaining Chapters: Time-frequency analysis, Gabor frames and wavelet frames. LÄS MER

  3. 13. Homogenization with applications in lubrication theory

    Detta är en avhandling från Luleå tekniska universitet

    Författare :Afonso Fernando Tsandzana; Luleå tekniska universitet.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics;

    Sammanfattning : In this licentiate thesis we study some mathematical problems in hydrodynamic lubrication theory. It is composed of two papers (A and B) and a complementary appendix. Lubrication theory is devoted to fluid flow in thin domains. The main purpose of lubrication is to reduce friction and wear between two solid surfaces in relative motion. LÄS MER

  4. 14. Hilbert space frames and bases a comparison of Gabor and wavelet frames and applications to multicarrier digital communications

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Niklas Grip; Luleå tekniska universitet.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

    Sammanfattning : Several signal processing applications today are based on the use of different transforms. The signals under consideration are written as a linear combination (or series) of some predefined set of functions. Traditionally, orthogonal bases have been used for this purpose, for example, in the discrete Fourier transform. LÄS MER

  5. 15. Homogenization of some new mathematical models in lubrication theory

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Afonso Fernando Tsandzana; Luleå tekniska universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lubrication theory; homogenization theory; Reynolds equation; cavitation; surfaces roughness; Stokes equation; Matematik; Mathematics;

    Sammanfattning : We consider mathematical modeling of thin film flow between two rough surfaces which are in relative motion. For example such flows take place in different kinds of bearings and gears when a lubricant is used to reduce friction and wear between the surfaces. LÄS MER