Sökning: "discrete Fourier transform"

Visar resultat 21 - 23 av 23 avhandlingar innehållade orden discrete Fourier transform.

  1. 21. High frequency scattering and spectral methods

    Författare :Imad Akeab; Sven-Erik Sandström; Andreas Asheim; Linnéuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Waves; Signals and Systems; Vågor; signaler och system;

    Sammanfattning : This thesis consists of five parts. The first part is an introduction with references to some recent work on 2D electromagnetic scattering problems at high frequencies. It also presents the basic integral equation types for impenetrable objects and the standard elements of the method of moments. LÄS MER

  3. 22. Some aspects of the dynamic soil-structure interaction of a portal frame bridge

    Författare :Mahir Ülker-Kaustell; Raid Karoumi; Mohammed Hjiaj; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building engineering; Byggnadsteknik;

    Sammanfattning : For certain bridge types, the influence of soil-structure interaction (SSI) may have an important contribution to the stiffness and damping of the structural system. From a design point of view, this influence may be both conservative and non-conservative and therefore, an increased knowledge within this field could lead to better design assumptions. LÄS MER

  4. 23. Regulation of energy balance in Caenorhabditis elegans 

    Författare :Ming Sheng; Simon Tuck; Lars Nilsson; Carina Holmberg-Still; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; C.elegans; fat metabolism; S6 Kinase; FT-IR; molekylär medicin genetik och patologi ; molecular medicine  genetics and pathology ;

    Sammanfattning : Obesity is a medical condition in which excess body fat has been accumulated. It is most commonly caused by imbalance between energy intake and energy expenditure (lack of physical activity and lower metabolic rate, etc.). LÄS MER