Sökning: "sparse matrices"

Visar resultat 11 - 15 av 31 avhandlingar innehållade orden sparse matrices.

  1. 11. Gradient Methods for Large-Scale and Distributed Linear Quadratic Control

    Författare :Karl Mårtensson; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Large-Scale Control; Distributed Control; Linear Quadratic Gaussian Control; Gradient method; Controller Synthesis;

    Sammanfattning : This thesis considers methods for synthesis of linear quadratic controllers for large-scale, interconnected systems. Conventional methods that solve the linear quadratic control problem are only applicable to systems with moderate size, due to the rapid increase in both computational time and memory requirements as the system size increases. LÄS MER

  3. 12. Methods from Statistical Computing for Genetic Analysis of Complex Traits

    Författare :Behrang Mahjani; Sverker Holmgren; Lars Rönnegård; Carl Nettelblad; Silvia Delgado Olabarriaga; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Statistical Computing; QTL mapping; Global Optimization; Linear Mixed Models; Scientific Computing; Beräkningsvetenskap;

    Sammanfattning : The goal of this thesis is to explore, improve and implement some advanced modern computational methods in statistics, focusing on applications in genetics. The thesis has three major directions.First, we study likelihoods for genetics analysis of experimental populations. LÄS MER

  4. 13. Iteratively Decodable Convolutional Codes: Analysis and Implementation Aspects

    Författare :Alberto Jimenez Feltström; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; systems theory; Informatics; Intersymbol Interference; BPSK; Product Codes; Braided Codes; Low-Density Parity-Check Codes; Convolutional Codes; Iterative Decoding; Informatik; systemteori; Systems engineering; computer technology; Data- och systemvetenskap;

    Sammanfattning : This thesis addresses the theory and implementation aspects of iteratively decodable codes. Iteratively decodable codes include, in particular, Gallager's regular low-density parity-check (LDPC) codes, Tanner's generalized LDPC (GLDPC) codes, turbo codes due to Berrou et. al. and expander codes. LÄS MER

  5. 14. Iterative solution of Maxwell's equations in frequency domain

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

    Sammanfattning : We have developed an iterative solver for the Moment Method. It computes a matrix–vector product with the multilevel Fast Multipole Method, which makes the method scale with the number of unknowns. The iterative solver is of Block Quasi-Minimum Residual type and can handle several right-hand sides at once. LÄS MER

  7. 15. High Performance Computing for the Optimization of Radiation Therapy Treatment Plans

    Författare :Felix Liu; Stefano Markidis; Artur Podobas; Albin Fredriksson; David Keyes; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; HPC; Radiation Therapy; Optimization; Numerical Linear Algebra; Interior Point Methods; Datalogi; Computer Science;

    Sammanfattning : Radiation therapy is a clinical field in which computer simulations play a crucial role. Before patients undergo radiation therapy, an individual treatment plan for each patient needs to be created based on the specifics of their case (a process often referred to as \emph{treatment planning}). LÄS MER