Sökning: "PDE"

Visar resultat 26 - 30 av 123 avhandlingar innehållade ordet PDE.

  1. 26. Design of High Performance Computing Software for Genericity and Variability

    Författare :Malin Ljungberg; Michael Thuné; Kurt Otto; Hans Petter Langtangen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PDE solver; high-performance; coordinate invariant; curvilinear coordinates; symmetry exploiting; generalized Fourier transform; finite difference; expression templates; feature modeling; variability; Beräkningsvetenskap; Scientific Computing;

    Sammanfattning : Computer simulations have emerged as a cost efficient complement to laboratory experiments, as computers have become increasingly powerful. The aim of the present work is to explore the ideas of some state of the art software development practices, and ways in which these can be useful for developing high performance research codes. LÄS MER

  3. 27. A parallel block-based PDE solver with space-time adaptivity

    Författare :Stefan Söderberg; Per Lötstedt; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Numerical Analysis; Numerisk analys;

    Sammanfattning : A second order space and time adaptive method for parallel solution of hyperbolic PDEs on structured grids is presented. The grid is adapted to the underlying solution by successive refinement in blocks. Therefore, there may be jumps in the cell size at the block faces. LÄS MER

  4. 28. Topics in applied mathematics -- error-correcting codes and homogenization of PDE

    Författare :Erik Alapää; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; homogenization of partial differential equations; error-correcting codes; channel coding; convolutional codes; streaming media; MPEG4; wireless IP; discrete Markov processes; MPEG4;

    Sammanfattning : .... LÄS MER

  5. 29. Adaptive Solvers for High-Dimensional PDE Problems on Clusters of Multicore Processors

    Författare :Magnus Grandin; Sverker Holmgren; Michael Thuné; Michael Bader; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adaptive mesh refinement; anisotropic refinement; exponential integrators; Lanczos algorithm; hybrid parallelization; time-dependent Schrödinger equation; Scientific Computing; Beräkningsvetenskap;

    Sammanfattning : Accurate numerical solution of time-dependent, high-dimensional partial differential equations (PDEs) usually requires efficient numerical techniques and massive-scale parallel computing. In this thesis, we implement and evaluate discretization schemes suited for PDEs of higher dimensionality, focusing on high order of accuracy and low computational cost. LÄS MER

  7. 30. Vascular and metabolic effects of selective PDE-5 inhibition - clinical and experimental studies

    Författare :Lovisa Sjögren; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Type 2 diabetes; MAPK; phosphodiesterase-5 inhibition; JNK; endothelial cells; E-selectine; VCAM-1; HUVEC; TNFa; ICAM-1; inflammation;

    Sammanfattning : ABSTRACT Vascular and metabolic effects of selective PDE-5 inhibition Clinical and experimental studies Lovisa Sjögren Department of Molecular and Clinical Medicine, Institute of Medicine at Sahlgrenska Academy, University of Gothenburg Key words: Type 2 diabetes, phosphodiesterase-5 inhibition, inflammation, endothelial cells, HUVEC. TNFα, ICAM-1, VCAM-1, E-Selectin, JNK, MAPK Background: Type 2 diabetes (T2D) patients show impaired glucose metabolism, endothelial dysfunction, chronic low-grade inflammation as well as an increased risk of cardiovascular disease. LÄS MER