Sökning: "four point operator"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden four point operator.

1. 1. 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. 2. Critical point theory with applications to semilinear problems without compactness

   Författare :Sara Maad; Jacqueline Fleckinger; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; MATEMATIK; MATHEMATICS; MATEMATIK; Mathematics; Matematik;

   Sammanfattning : The thesis consists of four papers which all regard the study of critical point theory and its applications to boundary value problems of semilinear elliptic equations. More specifically, let Ω be a domain, and consider a boundary value problem of the form -L u + u = f(x,u) in Ω, and with the boundary condition u=0. LÄS MER

4. 3. Computer Support for Preparatory Training in Automotive Assembly

   Författare :Lennart Malmsköld; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Job Instruction Training; Automotive Operator Training; Virtual Assembly Training; Lean Production;

   Sammanfattning : The automotive industry is facing new challenges constantly. Reduction of waste and time-to-market, the ability to offer the customer a unique combination of options and high product quality are examples of issues that have been in focus during the last decade and are still considered very important. LÄS MER

5. 4. Virtual Training - Preparatory Training in Automotive Assembly

   Författare :Lennart Malmsköld; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Lean Production; Virtual Assembly Training; Standardized Work; Automotive Operator Training;

   Sammanfattning : The automotive industry is constantly facing new challenges. Reduction of waste and time-to-market, ability to offer the customer a unique combination of options as well as high product quality are examples of issues that have been in focus during the past decade and still considered extremely important. LÄS MER

7. 5. A CFT perspective on holographic correlators

   Författare :Giulia Fardelli; Agnese Bissi; Paul Heslop; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Superconformal field theories; Analytic bootstrap; Correlation functions; Quantum gravity; Theoretical Physics; Teoretisk fysik;

   Sammanfattning : Conformal symmetry is ubiquitous in physics. It emerges in a variety of situations from critical phenomena, through condensed matter systems and jets at the LHC to string theory. Conformal field theories (CFTs) describe the universal behavior underlying these very different setups. LÄS MER