Sökning: "hybrid methods"

Visar resultat 21 - 25 av 482 avhandlingar innehållade orden hybrid methods.

  1. 21. Weak Boundary and Interface Procedures for Wave and Flow Problems

    Författare :Qaisar Abbas; Jan Nordström; Peter Eliasson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; weak boundary conditions; multiple penalty; finite difference methods; summation-by-parts; high order scheme; hybrid methods; MUSCL scheme; shocks; stability; energy estimate; steady-state; non-reflecting; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

    Sammanfattning : In this thesis, we have analyzed the accuracy and stability aspects of weak boundary and interface conditions (WBCs) for high order finite difference methods on Summations-By-Parts (SBP) form. The numerical technique has been applied to wave propagation and flow problems. LÄS MER

  3. 22. Hybrid printing on fibre-based packaging : Performance, Quality and Market

    Författare :Marcus Rehberger; Nils Enlund; Gunter Hübner; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; packaging; corrugated board; surface topography; print quality; variable data printing; hybrid printing; flexography; inkjet; print quality; market survey; Cellulose and paper engineering; Cellulosa- och pappersteknik;

    Sammanfattning : Variable data will play a decisive role in the future of packaging and product promotion. Variable data printing (VDP) is a technique whereby certain information can be altered in an otherwise static layout with the help of a digital printing system, and in the packaging industry a wide range of applications is possible. LÄS MER

  4. 23. Development of Numerical Methods for Accurate and Efficient Scale-Resolving Simulations

    Författare :Magnus Carlsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-order gradient reconstruction; Hybrid RANS-LES; Scale-resolving simulation; Synthetic Turbulence; Numerical methods; Turbulence modelling;

    Sammanfattning : Hybrid RANS (Reynolds-Averaged Navier-Stokes)-LES (Large-Eddy Simulation) techniques are considered to be sufficiently accurate and computationally affordable for the aeronautical industry. Scale-resolving simulations is a powerful tool that can accurately predict complex unsteady compressible high-Reynolds-number turbulent flows, as often encountered aeronautical applications. LÄS MER

  5. 24. Computational Methods for Optimal Control of Hybrid Systems

    Författare :Sven Hedlund; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; reglerteknik; Automation; robotics; control engineering; robotteknik; Automatiska system;

    Sammanfattning : This thesis aims to find algorithms for optimal control of hybrid systems and explore them in sufficient detail to be able to implement the ideas in computational tools. By hybrid systems is meant systems with interacting continuous and discrete dynamics. Code for computations has been developed in parallel to the theory. LÄS MER

  7. 25. Civil structural health monitoring : strategies, methods and applications

    Författare :Arvid Hejll; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : This thesis describes a Civil Structural Health Monitoring (CSHM) method for assessment of civil structures by using a combination of advanced monitoring equipment with probabilistic based assessment. The numbers of civil structures such as bridges, tunnels, retaining walls, dams, etc. LÄS MER