Sökning: "Discrete models"

Visar resultat 21 - 25 av 390 avhandlingar innehållade orden Discrete models.

  1. 21. Causal Combinatorics : Edges of the Characteristic Imset Polytopes

    Författare :Petter Restadh; Svante Linusson; Liam Solus; James Cussens; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics;

    Sammanfattning : Explaining data in a concise and efficient manner has become increasingly important in today's society. This thesis pertains to the problem of finding causal links within data, and how that can be done from a mathematical perspective. Using the framework of graphical models has several advantages, from interpretability to efficiency. LÄS MER

  3. 22. On Half-Space and Shock-Wave Problems for Discrete Velocity Models of the Boltzmann Equation

    Författare :Niclas Bernhoff; Alexander Bobylev; Giuseppe Toscani; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boltzmann equation; discrete velocity models; boundary value problems; shock waves; MATHEMATICS; MATEMATIK; Matematik; Mathematics;

    Sammanfattning : We study some questions related to general discrete velocity (with arbitrarily number of velocities) models (DVMs) of the Boltzmann equation. In the case of plane stationary problems the typical DVM reduces to a dynamical system (system of ODEs). Properties of such systems are studied in the most general case. LÄS MER

  4. 23. Modular Learning and Optimization for Planning of Discrete Event Systems

    Författare :Fredrik Hagebring; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; discrete optimization; large-scale optimization; modular learning; automation; discrete event systems; active learning; Compositional optimization;

    Sammanfattning : Optimization of industrial processes, such as manufacturing cells, can have great impact on their performance. Finding optimal solutions to these large-scale systems is, however, a complex problem. They typically include multiple subsystems, and the search space generally grows exponentially with each subsystem. LÄS MER

  5. 24. Synchronization Techniques in Parallel Discrete Event Simulation

    Författare :Jonatan Lindén; Bengt Jonsson; Christopher D. Carothers; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Parallel discrete event simulation; Discrete event simulation; PDES; Optimism control; Computer Science; Datavetenskap;

    Sammanfattning : Discrete event simulation is an important tool for evaluating system models in many fields of science and engineering. To improve the performance of large-scale discrete event simulations, several techniques to parallelize discrete event simulation have been developed. LÄS MER

  7. 25. From Declarative Models to Local Search

    Författare :Gustav Björdal; Pierre Flener; Justin Pearson; Laurent Michel; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; discrete optimisation; combinatorial optimisation; local search; large-neighbourhood search; MiniZinc; constraint programming; declarative modelling; declarative neighbourhoods; Computer Science; Datavetenskap;

    Sammanfattning : A solver is a general-purpose software for solving optimisation problems. It takes as input a description of a problem, called a model, and uses a collection of algorithms, called its solving technology, to ideally produce an optimal solution as output. Most solvers have a modelling language that cannot be processed by other solvers. LÄS MER