Search for dissertations about: "harmonic detection"

Showing result 1 - 5 of 32 swedish dissertations containing the words harmonic detection.

  2. 1. Recognition and Evaluation by Video Synthesis Methods and Symmetry Features

    Author : Dereje Teferi Lemma; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Biometrics; eye detection; video synthesis; liveness detection; camera calibration; damascening; Generalized Structure Tensor; symmetry codes;

    Abstract : Biometrics is being increasingly utilized for person authentication. It requires little or no efforts from the user as compared to traditional non-biometric systems where the user has to memorize PIN codes and passwords or carry pass cards and keys that can be easily forgotten or lost. READ MORE

  4. 2. Harmonic Mitigation in Traction Drives

    Author : Hans Bängtsson; Industriell elektroteknik och automation; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydraulics; Mechanical engineering; converter; line interference; track circuit; Railway signalling system; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Abstract : In railway traffic the low friction between wheel and rail causes long braking distances, normally much longer than the sight distance of the driver, i.e. if the driver starts the braking when a problem on the track is discovered, it might be too late to brake the train. Therefore, safe railway traffic can not only rely on the driver. READ MORE

  5. 3. Resonance-enhanced Second Harmonic Generation from spherical microparticles in aqueous suspension

    Author : Sviatlana Viarbitskaya; Tony Hansson; Micha Bonn; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nonlinear optics; second harmonic generation; adsorption; molecules; Physics; Fysik; Physics; fysik;

    Abstract : Second harmonic generation (SHG) is a nonlinear optical effect sensitive to interfaces between materials with inversion symmetry. It is used as an effective tool for detection of the adsorption of a substance to microscopic particles, cells, liposomes, emulsions and similar structures, surface analysis and characterization of microparticles. READ MORE

  6. 4. Enhancement, Detection, and Visualization of 3D Volume Data

    Author : Qingfen Lin; Tony Lindeberg; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Three-dimensional (3D) volume data become increasingly common with the emergence and wide availability of modern 3D image acquisition techniques. The demand for computerized analysis and visualization techniques is constantly growing to utilize the abundant information embedded in these data.This thesis consists of two parts. READ MORE

  7. 5. Exploring Polymer-Shelled Microbubbles: Detection Modeling and Application

    Author : Hongjian Chen; Dmitry Grishenkov; Birgitta Janerot-Sjöberg; Tomas Jansson; KTH; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ultrasound contrast agent; polymer-shelled microbubble; ultrasound imaging; contrast pulse sequence; microbubble model; hydrodynamic cavitation; Technology and Health; Teknik och hälsa;

    Abstract : Ultrasound imaging (US) is widely used in clinical practice. Given the low cost and easy access to the ultrasound machine, US has a great potential to improve the health care condition for the majority of the population in the world. The US could be significantly improved by injecting ultrasound contrast agents to opacify the bloodstream. READ MORE