Sökning: "complexity reduction"

Visar resultat 1 - 5 av 227 avhandlingar innehållade orden complexity reduction.

  1. 1. Simplicity within Complexity : Understanding dynamics of cellular networks by model reduction

    Detta är en avhandling från Stockholm : Institutionen för biokemi och biofysik

    Författare :Olivia Eriksson; Stockholms universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; model reduction; cellular networks; dynamical modules; delayed piecewise linear; systems biology; NATURAL SCIENCES Chemistry Biochemistry; NATURVETENSKAP Kemi Biokemi; biokemi; Biochemistry;

    Sammanfattning : Cellular networks composed of interactions between genes, proteins and metabolites, determines the behavioural repertoire of the cell. Recent developments in high-throughput experimental techniques and computational methods allow static descriptions of these networks on a genome scale. LÄS MER

  2. 2. Model Order Reduction Based on Semidefinite Programming

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology, Lund University

    Författare :Aivar Sootla; Lunds universitet.; Lund University.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; model reduction; parameterized model reduction; nu-gap metric; semidefinite programming; frequency response matching.;

    Sammanfattning : The main topic of this PhD thesis is complexity reduction of linear time-invariant models. The complexity in such systems is measured by the number of differential equations forming the dynamical system. This number is called the order of the system. LÄS MER

  3. 3. Model Reduction Using Semidefinite Programming

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology, Lund University

    Författare :Aivar Sootla; Lunds universitet.; Lund University.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semidefinite programming; model reduction; convex optimization;

    Sammanfattning : In this thesis model reduction methods for linear time invariant systems are investigated. The reduced models are computed using semidefinite programming. Two ways of imposing the stability constraint are considered. However, both approaches add a positivity constraint to the program. LÄS MER

  4. 4. Structural and evolutionary aspects of stochastic processes

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology, Lund University

    Författare :Olof Görnerup; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Proto-cells.; Emergence; Self-organization; Coarse graining; Model reduction; Hierarchical dynamics; Pre-biotic evolution; Complexity;

    Sammanfattning : Stochastic processes constitute a broad class of objects of central importance in complex systems. The main structural aspect of stochastic processes that is treated in this thesis is their hierarchical dynamics. LÄS MER

  5. 5. Modeling and Model Reduction in Automotive Systems

    Detta är en avhandling från Department of Automatic Control, Lund Institute of Technology, Lund University

    Författare :Oskar Nilsson; Lunds universitet.; Lund University.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Automotive systems; Lambda sensor; Model reduction; Modeling; Engine air path;

    Sammanfattning : The current control design development process in automotive industry and elsewhere involves many expensive experiments and hand-tuning of control parameters. Model based control design is a promising approach to reduce costs and development time. In this process low complexity models are essential. LÄS MER