Search for dissertations about: "local stability"

Showing result 1 - 5 of 329 swedish dissertations containing the words local stability.

2. 1. Extinctions and Ecosystem Stability

   Author : Susanne Pettersson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; structural stability; ecosystems; interaction structure; Generalised Lotka-Volterra; complexity; local stability; dynamical systems; stability;

   Abstract : Human society's expansion and demand for both biotic and abiotic natural resources exert a large pressure on ecosystems around the globe. Ecosystems are complex networks of species interacting with each other and their physical surroundings. READ MORE

4. 2. Analysis and Design of Hybrid Systems

   Author : Stefan Pettersson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asymptotic stability; Lyapunov theory; exponential stability; piecewise quadratic Lyapunov functions; hybrid systems; stability; linear matrix inequalities; nonlinear systems; LMIs; control theory; fuzzy systems;

   Abstract : Many physical systems today are modeled by interacting continuous and discrete event systems. Such hybrid systems contain both continuous and discrete states that influence the dynamic behavior. READ MORE

5. 3. Stability and transition of three-dimensional boundary layers

   Author : Seyed Mohammad Hosseini; Ardeshir Hanifi; Vassilios Theofilis; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Receptivity; stability; optimal growth; three-dimensional boundary layers; crossflow instability; roughness control; freestream turbulence; secondary instability;

   Abstract : A focus has been put on the stability characteristics of different flow types existing on air vehicles. Flow passing over wings and different junctions on an aircraft face numerous local features, ranging from different pressure gradients, to interacting boundary layers. READ MORE

6. 4. Stability of Bulk-heterojunction blends for Solar Cell Applications

   Author : Camilla Lindqvist; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; nanostructure; PCBM crystallisation; bulk-heterojunction; Polymer solar cells; stability;

   Abstract : Polymer solar cells are a promising alternative to more traditional silicon solar cells. This is mainly due to the good solubility of organic semiconductors, which makes it possible to produce large-scale and mechanically flexible devices with roll-to-roll processes. READ MORE

7. 5. Wrinkling of sandwich panels for marine applications

   Author : Linus Fagerberg; KTH; []
   Keywords : wrinkling; local buckling; imperfection; stability; anisotropy; sandwich;

   Abstract : The recent development in the marine industry with largerships built in sandwich construction and also the use of moreadvanced materials has enforced improvements of design criteriaregarding wrinkling. The commonly used Hoff’s formula isnot suited for the highly anisotropic fibre reinforced sandwichface sheets of today. READ MORE