Sökning: "Generalized Structure Tensor"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Generalized Structure Tensor.

1. 1. Algorithms in data mining using matrix and tensor methods

   Detta är en avhandling från Matematiska institutionen

   Författare :Berkant Savas; Lars Eldén; Lieven De Lathauwer; [2008]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Volume; Minimization criterion; Determinant; Rank deficient matrix; Reduced rank regression; System identification; Rank reduction; Volume minimization; General algorithm; Handwritten digit classification; Tensors; Higher order singular value decomposition; Tensor approximation; Least squares; Tucker model; Multilinear algebra; Notation; Contraction; Tensor matricization; Newton s method; Grassmann manifolds; Product manifolds; Quasi-Newton algorithms; BFGS and L-BFGS; Symmetric tensor approximation; Local intrinsic coordinates; Global embedded coordinates; ; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys;

   Sammanfattning : In many fields of science, engineering, and economics large amounts of data are stored and there is a need to analyze these data in order to extract information for various purposes. Data mining is a general concept involving different tools for performing this kind of analysis. LÄS MER

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

   Detta är en avhandling från Matematiska institutionen

   Författare :Dereje Teferi Lemma; [2009]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Biometrics; eye detection; video synthesis; liveness detection; camera calibration; damascening; Generalized Structure Tensor; symmetry codes;

   Sammanfattning : 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. LÄS MER

4. 3. Simulations of thermoelectric transport in granularsuperconductors

   Detta är en avhandling från Stockholm : KTH

   Författare :Andreas Andersson; Jack Lidmar; Vladimir Krasnov; [2010]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Physics Condensed matter physics Superconductivity; NATURVETENSKAP Fysik Kondenserade materiens fysik Supraledning;

   Sammanfattning : This thesis presents results from numerical simulations of the Nernst effect dueto phase fluctuations in models of two-dimensional granular superconductors. Inaddition other transport properties, such as thermal conductivity and electrical re-sistivity are calculated. LÄS MER

5. 4. Propagation of some coherent and partially coherent laser beams

   Detta är en avhandling från Stockholm : KTH

   Författare :Yangjian Cai; Sailing He; Franco Gori; [2006]
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; : dark hollow beam; elliptical Gaussian beam; flat-topped beam; twisted anisotropic Gaussian Schell-model; partial coherent; propagation; paraxial optical system; TECHNOLOGY Electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik;

   Sammanfattning : In this thesis, we investigate the propagation of some coherent and partially coherent laser beams, including a dark hollow beam (DHB), an elliptical Gaussian beam (EGB), a flat-topped beam and a twisted anisotropic Gaussian Schell-model (TAGSM) beam, through a paraxial optical system or a turbulent atmosphere. Several theoretical models are proposed to describe a DHB of circular or non-circular symmetry. LÄS MER

7. 5. Simple Modules over Lie Algebras

   Detta är en avhandling från Uppsala : Department of Mathematics

   Författare :Jonathan Nilsson; Volodymyr Mazorchuk; Erhard Neher; [2016]
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Lie algebra; Representation; Simple module; Non-weight module; Classification; Construction; Mathematics; Matematik;

   Sammanfattning : Simple modules are the elemental components in representation theory for Lie algebras, and numerous mathematicians have worked on their construction and classification over the last century. This thesis consists of an introduction together with four research articles on the subject of simple Lie algebra modules. LÄS MER