Sökning: "singular perturbation"
Visar resultat 11 - 12 av 12 avhandlingar innehållade orden singular perturbation.
11. Knotted Nodal Band Structures
Sammanfattning : It is well known that in conventional three dimensional (3D) Hermitian two band models, the intersections between the energy bands are generically given by points. The typical example are Weyl semimetals, where these singular points can be effectively described as Weyl fermions in the low energy regime. LÄS MER
12. Automatic Reduction Procedures for Chemical Mechanisms in Reactive Systems
Sammanfattning : To deal with complex physical and chemical processes in reactive systems, such as combustion processes, it is necessary to find methods that simplify modelling in such a way that it becomes both more comprehensible and practically useful. In the work reported here a method for automatically reducing chemical reaction mechanisms has been developed for use in computer simulations of various combustion systems. LÄS MER
