Search for dissertations about: "Integral inversion"

Showing result 1 - 5 of 14 swedish dissertations containing the words Integral inversion.

  1. 1. Inversion and Joint Inversion of Electromagnetic and Potential Field Data

    Author : Jochen Kamm; Ari Tryggvason; Laust B Pedersen; Mehrdad Bastani; Douglas Oldenburg; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Inversion; Electromagnetic methods; Joint inversion; Potential Field methods; Inversion; Elektromagnetische Verfahren; Joint-Inversion; Potentialverfahren; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

    Abstract : In this thesis, four inversion problems of different scale and difficulty are solved. Two of them are electromagnetic inverse problems. Two more are joint inversion problems of potential field data and other types of data. READ MORE

  2. 2. Inversion of circular averages and application of backprojection methods to radar imaging

    Author : Stefan Nilsson; Linköpings universitet; []
    Keywords : inverse problem; backprojection; tomography; integral geometry;

    Abstract : In this report we study two mathematical inverse problems concerning the determination of a function from spherical averages, which appear in certain radar applications. The first inverse problem consists of determining a function from its spherical averages over all circles with center on a straight line and with arbitrary radius. READ MORE

  3. 3. Retrieval of equivalent currents by the use of an integral representation and the extinction theorem --- radome applications

    Author : Kristin Persson; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; extinction theorem; inverse source problem; integral representation; radome diagnosis; near-field transformation;

    Abstract : The aim of this thesis is to solve an inverse source problem. The approach is based on an integral representation together with the extinction theorem. Both a scalar and a full-wave integral representation are implemented and solved by a Method of Moment procedure. READ MORE

  4. 4. Some Applications of Integral Formulas in Several Complex Variables

    Author : Jörgen Boo; Chalmers tekniska högskola; []
    Keywords : ;

    Abstract : The thesis gives three examples of how integral formulas can be used in complex analysis. We say that a set S in Cn is quadratically convex if through any point in its complement there is a quadratic hypersurface that does not intersect S. READ MORE

  5. 5. Some Applications of Integral Formulas in Several Complex Variables

    Author : Jörgen Boo; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : ;

    Abstract : The thesis gives three examples of how integral formulas can be used in complex analysis. We say that a set S in Cn is quadratically convex if through any point in its complement there is a quadratic hypersurface that does not intersect S. READ MORE