Sökning: "collocation"

Visar resultat 16 - 20 av 46 avhandlingar innehållade ordet collocation.

  1. 16. Potential Flow Panel Methods for the Calculation of Free-surface Flows with Lift

    Författare :Carl-Erik Janson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; desingularized; shape optimization; Rankine source; waves; OCTOPUS; dipole; MMA; Dawson operator; boundary layer; vortex; Method of Moving Asymptotes; nonlinear; sailing yacht; four point operator; surface piercing wing; Navier-Stokes; numerical method; lift force; raised panel method; discrete Fourier transform; collocation point shift; potential flow; CFD; free surface; induced drag; SHIPFLOW; dispersion; damping; analytical method; hydrofoil;

    Sammanfattning : Two non-linear Rankine-source panel methods are developed and implemented in the same computer code. The first method uses a four-point upwind operator on the free-surface to compute the velocity derivatives and to enforce the radiation condition while the second method uses an analytical expression for the velocity derivatives and a collocation point shift one panel upstream to prevent upstream waves. LÄS MER

  3. 17. Some computational aspects of the boundary collocation method for linear partial differential equations and related questions

    Författare :Lothar Reichel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Many problems of Applied Mathematics can be formulated as linear partial differential equations for which a complete set of particular solutions is explicitly known. Solving these problems by the boundary collocation method means that one seeks an approximate solution in the form of a linear combination of particular solutions. LÄS MER

  4. 18. Delexical Verb + Noun Collocations in Swedish and Chinese Learner English

    Författare :Ying Wang; Merja Kytö; Erik Smitterberg; Signe Oksefjell Ebeling; Uppsala universitet; []
    Nyckelord :delexical verb noun collocation; learner English; idiom-principle; L1 influence; learner corpus research; contrastive study; English; Engelska;

    Sammanfattning : This thesis deals with the use of delexical verb + noun collocations such as have no doubt, make a decision and give a speech in Swedish and Chinese learner English. The aim of the study is to investigate interlanguage (IL) developmental patterns as well as the role of L1 influence in the learners’ use of such collocations. LÄS MER

  5. 19. Grey-box Identification of Distributed Parameter Systems

    Författare :Yi Liu; Elling W. Jacobsen; Denis Dochain; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; grey-box modeling; grey-box identification; model reduction; PDE; chromatography; bifurcation; moving mesh methods; orthogonal collocation on moving finite elements; OCMFE; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Sammanfattning : This thesis considers the problem of making dynamic models for industrial processes by combining physical modelling with experimental data. The focus is on distributed parameter systems, that is, systems for which the model structure involves partial differential equations (PDE). Distributed parameter systems are important in many applications, e. LÄS MER

  7. 20. Determination of Land uplift in Areas not covered by Repeated Levellings with application to South-Norway

    Författare :Jan Danielsen; Lars Sjöberg; KTH; []
    Nyckelord :;

    Sammanfattning :  The fennoscandia post glacial uplift rate of today, the time averaged vertical velocity, is usually determined by mareographs and repeated leveling. We consider situations where parts of the levelling not are observed only once. LÄS MER