Sökning: "Perturbations"

Visar resultat 1 - 5 av 398 avhandlingar innehållade ordet Perturbations.

1. 1. On Supersingular Perturbations

   Författare :Christoph Neuner; Annemarie Luger; Rostyslav Hryniv; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; matematik;

   Sammanfattning : This thesis consists of four papers and deals with supersingular rank one perturbations of self-adjoint operators and their models in Hilbert or Pontryagin spaces. Here, the term supersingular describes perturbation elements that are outside the underlying space but still obey a certain regularity conditions. LÄS MER

3. 2. Renormalization of perturbations in the spin-1/2 chain

   Författare :David Gustafsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; non-abelian bosonization; renormalization group; perturbations; operator product expansion; Spin- 1 2 chain;

   Sammanfattning : .... LÄS MER

4. 3. Neutronics in reactors with propagating perturbations

   Författare :Anders Jonsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; one-group theory; Green s function; Molten Salt Reactors; two-group theory; neutron noise; propagating perturbations;

   Sammanfattning : This thesis contains several studies of the properties of neutron noise, primarily in Molten Salt Reactors and other reactors with propagating perturbations. Both one- and two-group diffusion theory are employed to investigate the differences that arise from the movement of the fuel. LÄS MER

5. 4. Robustness quantification in yeast: A methodology to study phenotypic, evolutionary, and genomic aspects of microbial robustness

   Författare :Cecilia Trivellin; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; bioproduction; Saccharomyces cerevisiae; adaptive laboratory evolution; High-throughput; fluctuating conditions; perturbations;

   Sammanfattning : Bioprocesses contribute to the shift towards a more sustainable economy. In bioprocesses, valuable chemicals can be generated from renewable resources while, at the same time, reducing carbon emissions. A major hurdle in bringing bio-based products to market is the time and cost involved in designing efficient cell factories. LÄS MER

7. 5. Numerical computations of the unsteady flow in turbochargers

   Författare :Fredrik Hellström; Laszlo Fuchs; Ricardo Martinez-Botas; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbochargers; turbine; compressor; unsteady pulsatile flow; perturbations; Large Eddy Simulation; Fluid mechanics; Strömningsmekanik;

   Sammanfattning : Turbocharging the internal combustion (IC) engine is a common technique to increase the power density. If turbocharging is used with the downsizing technique, the fuel consumption and pollution of green house gases can be decreased. LÄS MER