Search for dissertations about: "multipole analysis"

Showing result 1 - 5 of 12 swedish dissertations containing the words multipole analysis.

2. 1. Analysis of Industrial Microwave Ovens

   Author : Magnus Sundberg; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; source model; heat transfer; moment method; finite difference time domain; TM applicator; GMT; edge diffraction; thermal simulation; MMP; FDTD; generalized multipole technique; cost function; MM; optimization; magnetron; simulated annealing; multiple multipole program; microwave heating; edge overheating; TE applicator; tunnel-oven; applicator;

   Abstract : This thesis deals with the analysis and design of microwave ovens used in the food industry. Such analysis is desirable in order to optimize the performance of the ovens and to reduce the time and expenses of developing new or improved ovens. READ MORE

4. 2. Fast Numerical Techniques for Electromagnetic Problems in Frequency Domain

   Author : Martin Nilsson; Per Lötstedt; Abderrahmane Bendali; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fast Multipole Method; Minimal Residual Interpolation; Sparse Approximate Inverse preconditioning; Method of Moments; fast solvers; iterative methods; multiple right-hand sides; error analysis; Numerical Analysis; Numerisk analys;

   Abstract : The Method of Moments is a numerical technique for solving electromagnetic problems with integral equations. The method discretizes a surface in three dimensions, which reduces the dimension of the problem with one. A drawback of the method is that it yields a dense system of linear equations. READ MORE

5. 3. Applications of Magnetic Tracers in the Human Lung and Gastrointestinal Tract

   Author : Mikael Forsman; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; inverse solution; gastrointestinal motility; inhaled particles; gastric emptying; welding dust; MPG; pulmonary clearance; occupational health; magnetopneumography; multipole analysis; transit time;

   Abstract : The use of ferrimagnetic material as a tracer represents a noninvasive approach in physiological measurements. Concerning the lung, magnetopneumography, MPG, is a unique technique to estimate retained dust in the lung, using the magnetizable dust fraction as a tracer. First a strong constant magnetic field is briefly applied to the thorax. READ MORE

6. 4. Iterative solution of Maxwell's equations in frequency domain

   Author : Martin Nilsson; Per Lötstedt; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Numerical Analysis; Numerisk analys;

   Abstract : We have developed an iterative solver for the Moment Method. It computes a matrix–vector product with the multilevel Fast Multipole Method, which makes the method scale with the number of unknowns. The iterative solver is of Block Quasi-Minimum Residual type and can handle several right-hand sides at once. READ MORE

7. 5. Theoretical Description of Electronic Transitions in Large Molecular Systems in the Optical and X-Ray Regions

   Author : Nanna Holmgaard List; Jacob Kongsted; Hans Jørgen Aagaard Jensen; Roberto Cammi; Jeppe Olsen; Jens Oddershede; Denmark University of Southern Denmark Chemistry and Biology Department of Physics; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Polarizable embedding; multiscale modeling; localized electronic transitions; response theory; QM MM; damped linear response; non-dipolar effects; light-matter interactions; multipole expansion; embedding potentials; local field effects; fluorescent proteins; computational chemistry; MCSCF; Teoretisk kemi och biologi; Theoretical Chemistry and Biology;

   Abstract : The size and conformational complexity of proteins and other large systems represent major challenges for today's methods of quantum chemistry.This thesis is centered around the development of new computational tools to gain molecular-level insight into electronic transitions in such systems. READ MORE