Sökning: "Dynamical systems"

Visar resultat 1 - 5 av 133 uppsatser innehållade orden Dynamical systems.

  1. 1. Simuleringsdriven inferens av stokastiska dynamiska system

    Kandidat-uppsats, Göteborgs universitet/Institutionen för matematiska vetenskaper

    Författare :Alfred Andersson; Vilgot Jansson; Noah Trädgårdh; Jacob Welander; Victor Wellsmo; [2023-11-28]
    Nyckelord :;

    Sammanfattning : Stokastiska modeller, som ger tillförlitlig och användbar information om ett systems beteende, består ofta av stokastiska differentialekvationer (SDE) vars likelihoodfunktion inte är analytiskt tillgänglig. Mer traditionella Markov Chain Monte Carlo-metoder (MCMC) samt relativt nyligen utvecklade likelihood-fria Approximate Bayesian Computation-metoder (ABC) utgör populära angrepssätt för att utföra inferens på dessa typer av problem. LÄS MER

  3. 2. A Borel-Cantelli lemma for non-stationary dynamical systems

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Teodor Åberg; [2023]
    Nyckelord :Borel-Cantelli lemmas; Dynamical systems; Mathematics and Statistics;

    Sammanfattning : In this thesis we present a Borel–Cantelli lemma for dynamical systems such that the dynamics driving the system varies with time. These results are largely based on a decomposition of transfer operators produced by Rychlik. Some limitations on the structure of sequences that is necessary for the results is given some discussion. LÄS MER

  4. 3. Data Assimilation for Systems with Multiple Timescales

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Dan Vicente Ihanus; [2023]
    Nyckelord :Mathematics; Partial Differential Equations; Numerical analysis; Data assimilation; Numerical weather prediction; Ensemble Kalman Filter;

    Sammanfattning : This text provides an overview of problems in the field of data assimilation. We explore the possibility of recreating unknown data by continuously inserting known data into certain dynamical systems, under certain regularity assumptions. LÄS MER

  5. 4. Start of a new design method for a competitive Small Modular Reactor (SMR) adaptable to future uses

    Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Baptiste Mazurié; [2023]
    Nyckelord :Requirement modelling; Cyber-physical systems; Small Modular Reactor SMR ; Systems Engineering; CRML;

    Sammanfattning : As cyber-physical systems become increasingly complex, the management and verification of requirements during design is essential. A new language called CRML (Common Requirement Modelling Language) has been created during the European EMBrACE project to formalize realistic dynamical requirements, but a method for representing these requirements and a framework for using them as a design aid must be defined to ease appropriation by engineers. LÄS MER

  7. 5. Short-horizon Prediction of Indoor Temperature using Low-Order Thermal Networks : A case study of thermal models for heat-system control applications

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jonas Cederberg; [2023]
    Nyckelord :Lumped Parameter Thermal Network; Resistance-Capacitance model; Parameter estimation; Modelling of Dynamical Systems; Thermal modelling; Temperature Prediction; Termiskt nätverk med klumpade parametrar; Mostånds-kapacitans modell; Parameterestimering; Modellering av dynamiska system; Termisk modellering; Temperaturprediktion.;

    Sammanfattning : Optimizing and controlling the heating systems in buildings is one way to decrease their load on the power grid, as well as introduce load flexibility to be used in Demand Response (DR) applications. A requirement in occupied buildings is that the thermal comfort of the residents is guaranteed, making the optimization of heating systems a constrained problem with respect to indoor temperature. LÄS MER