Sökning: "derivation"

Visar resultat 31 - 35 av 271 avhandlingar innehållade ordet derivation.

  1. 31. Reconstruction Techniques and Finite Volume Schemes for Hyperbolic Conservation Laws

    Författare :Robert Artebrant; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; numerical analysis; Computer science; high order reconstruction; Conservation law; finite volume method; Datalogi; control; systems; kontroll; numerisk analys; system;

    Sammanfattning : This thesis concerns the numerical approximation of the solutions to hyperbolic conservation laws. In particular the research work focuses on reconstruction techniques; the reconstruction being the key ingredient in modern finite volume schemes aiming to increase spatial order of accuracy. LÄS MER

  3. 32. Complexities of Parsing in the Presence of Reordering

    Författare :Martin Berglund; Frank Drewes; Bruce Watson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; parsing; membership problems; complexity theory; reordering; shuffle; mildly context-sensitive; formal languages; Computer Science; datalogi;

    Sammanfattning : The work presented in this thesis discusses various formalisms for representing the addition of order-controlling and order-relaxing mechanisms to existing formal language models. An immediate example is shuffle expressions, which can represent not only all regular languages (a regular expression is a shuffle expression), but also features additional operations that generate arbitrary interleavings of its argument strings. LÄS MER

  4. 33. Asthmatics as a susceptible population in health risk assessment of airborne chemicals

    Författare :Mia Johansson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Asthma is a common chronic airway disease and about 235-300 million individuals of all ages are affected by the disease around the world. A precondition of asthma has been suggested to increase individual susceptibility to acute exposure from airborne irritant chemicals. LÄS MER

  5. 34. The age of transported scalars in fluid mechanics

    Författare :Federico Ghirelli; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; grate furnace; velocity correlation; fluid age; scalar age; turbulence model; residence time; energy spectrum; turbulence age;

    Sammanfattning : Computational fluid dynamics (CFD) is applied to the reacting flow in the freeboard of a 30MW biofuel fired grate furnace and results are validated by comparison with data from an extensive measurement campaign. The influence of the fuel bed model on the results of the freeboard model is investigated. LÄS MER

  7. 35. Liquidity and Portfolio Optimisation

    Författare :Björn Hagströmer; Jane M. Binner; Aston University Aston Business School; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; stock market; liquidity; systematic liquidity; portfolio optimisation; high-frequency data; Economics; Nationalekonomi;

    Sammanfattning : This thesis presents research within empirical financial economics with focus on liquidity and portfolio optimisation in the stock markets. The discussion on liquidity is focussed on measurement issues, including TAQ data processing and measurement of systematic liquidity factors. LÄS MER