Sökning: "Time adaptivity"

Visar resultat 1 - 5 av 34 avhandlingar innehållade orden Time adaptivity.

  1. 1. Automation of Computational Mathematical Modeling

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Anders Logg; Göteborgs universitet.; Gothenburg University.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; computational mathematical modeling; automation; adaptivity; multi-adaptivity; individual time steps; dual problem; a priori; a posteriori; model reduction;

    Sammanfattning : This thesis concerns the Automation of Computational Mathematical Modeling (CMM), involving the key steps of automation of (i) discretization, (ii) discrete solution, (iii) error control, (iv) modeling, and (v) optimization. The automation of (i)--(ii) is realized through multi-adaptive Galerkin methods on general discretizations of space-time with time steps variable in space. LÄS MER

  2. 2. Adaptive Middleware for Self-Configurable Embedded Real-Time Systems Experiences from the DySCAS Project and Remaining Challenges

    Detta är en avhandling från Stockholm : KTH

    Författare :Magnus Persson; KTH.; [2009]
    Nyckelord :adaptivity; embedded real-time systems; DySCAS; DyLite; quality of service QoS ; load balancing; resource constraints; model-based design; component-based design; software architecture; adaptive middleware;

    Sammanfattning : Development of software for embedded real-time systems poses severalchallenges. Hard and soft constraints on timing, and usually considerableresource limitations, put important constraints on the development. Thetraditional way of coping with these issues is to produce a fully static design,i.e. LÄS MER

  3. 3. Partitioned methods for time-dependent thermal fluid-structure interaction

    Detta är en avhandling från Lund University, Faculty of Science, Centre for Mathematical Sciences

    Författare :Azahar Monge; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2018-09]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal FSI; Conjugate heat transfer; Domain decomposition; Time adaptivity; Coupled problems; multirate;

    Sammanfattning : The invention of computers revolutionized the way of doing science and in particular the field of mathematics. Computers were faster than any human mind in doing calculations and they did not make mistakes opening a wide range of possibilities that earlier where in practice uncomputable. LÄS MER

  4. 4. Construction of Adaptive Multistep Methods for Problems with Discontinuities, Invariants, and Constraints

    Detta är en avhandling från Lund University, Faculty of Science, Centre for Mathematical Sciences

    Författare :Fatemeh Mohammadi; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2018-09]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; multistep methods; Initialization; beta-blocking; Discontinuity; Time adaptivity; Strong stability preserving; Differential algebraic equations;

    Sammanfattning : The wide variety of physical phenomena, such as motion of objects, reaction among chemical substances, electricity flow in a circuit can be described by equations with quantities that vary along time.The rate at which a quantity is changing with respect to its independent variable (time), is represented by its derivative. LÄS MER

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

    Detta är en avhandling från Uppsala University

    Författare :Stefan Söderberg; Uppsala universitet.; Uppsala universitet.; [2001]
    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