Sökning: "geodesics"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet geodesics.

  1. 1. Analysis and Design of Conformal Array Antennas

    Detta är en avhandling från Stockholm : KTH

    Författare :Patrik Persson; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Conformal antennas; conformal arrays; UTD; high frequency method; MoM; hybrid method; mutual coupling; singly curved surface; doubly curved surface; geodesics; dielectric covered circular cylinder; non-paraxial region. paraxial region; waveguide fed; TECHNOLOGY Electrical engineering; electronics and photonics Electrical engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektroteknik;

    Sammanfattning : Today there is a great need for communication between people and even between things, using systems onboard e.g. aircraft, cars, ships and satellites. As a consequence, these communications needs require antennas mounted on or integrated in the surfaces of different vehicles or platforms, i. LÄS MER

  2. 2. Salient Region Detection Methods with Application to Traffic Sign Recognition from Street View Images

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Keren Fu; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; normalized cut; traffic sign recognition; saliency propagation; color distribution; continuous conditional random field; manifold; Salient region detection; adaptive graph edge weights; color contrast; geodesics;

    Sammanfattning : In the computer vision community, saliency detection refers to modeling the selective mechanism in human visual attentions. Outputs of saliency detection algorithms are called saliency maps, which represent conspicuousness levels of different scene areas. LÄS MER

  3. 3. Electromagnetic Fields in Moving and Inhomogeneous Media

    Detta är en avhandling från Stockholm : Alfvénlaboratoriet

    Författare :Paul Piwnicki; [2001]
    Nyckelord :Moving Media; Light; Genaral Relativity;

    Sammanfattning : The present thesis deals with electromagnetic effectscreated by the motion or inhomogeneity of a dielectricmedium.In the first paper the quantum R\"ontgen effect isdiscussed. Here a rotating Bose-Einstein condensate -- oranother kind of quantum fluid -- is placed in a chargedcapacitor. The medium's rotation creates a magnetic field. LÄS MER

  4. 4. Exploring the Set of Quantum States

    Detta är en avhandling från Stockholm : Fysikum

    Författare :Åsa Ericsson; Ingemar Bengtsson; Christopher Fuchs; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum mechanics; quantum states; density matrices; quantum information; geometry; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; Theoretical Physics; teoretisk fysik;

    Sammanfattning : Quantum mechanical properties of finite dimensional quantum systems are used within the field of quantum information. In this thesis the set of states (density matrices) for such systems is studied and described, largely in geometrical terms. LÄS MER

  5. 5. Continuum Percolation in non-Euclidean Spaces

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Johan Tykesson; Göteborgs universitet.; Gothenburg University.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bernoulli percolation; continuum percolation; dependent percolation; double phase transition; hyperbolic space; Poisson Boolean model; geodesic percolation; continuum percolation; Poisson Boolean model; dependent percolation; hyperbolic space; double phase transition; geodesic percolation;

    Sammanfattning : In this thesis we first consider the Poisson Boolean model ofcontinuum percolation in $n$-dimensional hyperbolic space ${\mathbb H}^n$. Let $R$ be the radius of the balls in the model, and$\lambda$ the intensity of the underlying Poisson process. LÄS MER