Sökning: "null field approach"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden null field approach.

  1. 1. Elastic wave scattering from corrugated surfaces in anisotropic media

    Författare :Tatiana Krasnova; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; corrugated surface; perturbation approach; scattering; anisotropy; ultrasonic waves; null field approach; integral equation; Green s function;

    Sammanfattning : .... LÄS MER

  3. 2. Rough Scatterers in Acoustics and Elastodynamics

    Författare :Per-Åke Jansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; acoustic scattering; penny-shaped crack; rough surfaces; elastodynamic scattering; T matrix; null field approach;

    Sammanfattning : The purpose of this thesis is to investigate the influence of roughness on wave scattering from finite-sized surfaces, in particular elastic wave scattering from cracks. Acoustic scattering from a sphere is considered using the null field approach. LÄS MER

  4. 3. Ultrasonic NDT in Defect Detection - Mathematical modelling

    Författare :Håkan Wirdelius; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crack; null field approach; transducers; optimisation; ultrasonics; elastic waves; nondestructive testing; T matrix method; inverse problem;

    Sammanfattning : This thesis is concerned with the mathematical modelling of the ultrasonic nondestructive testing situation. The first part of the thesis treats a simplified model of an ultrasonic transducer and its implementation into a T-matrix method-based solution to a crack scattering problem. LÄS MER

  5. 4. An investigation into the static, rigid, and acoustic limits of the null field approach to elastodynamic

    Författare :Peter Olsson; Jönköping University; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 5. True and False Intentions: A Mental Representational Approach

    Författare :Sofia Calderon; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; deception; true and false intentions; construal level theory; mental representation; abstraction; action identification theory;

    Sammanfattning : The study of true and false intentions is a specific case of deception-detection research. The focus is on how to discriminate between lies and truths about future behavior, as opposed to previous deception research that focused almost exclusively on past behavior. LÄS MER