Sökning: "eigenvalue problem"
Visar resultat 1 - 5 av 37 uppsatser innehållade orden eigenvalue problem.
1. The Collapse of Decoherence : Can Decoherence Theory Solve The Problems of Measurement?
Master-uppsats, Uppsala universitet/MaterialteoriSammanfattning : In this review study, we ask ourselves if decoherence theory can solve the problems of measurement in quantum mechanics. After an introduction to decoherence theory, we present the problem of preferred basis, the problem of non-observability of interference and the problem of definite outcomes. LÄS MER
2. Dirichlet-to-Neumann maps and Nonlinear eigenvalue problems
Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)Sammanfattning : Differential equations arise frequently in modeling of physical systems, often resulting in linear eigenvalue problems. However, when dealing with large physical domains, solving such problems can be computationally expensive. LÄS MER
3. Approximating Quasistationary Distributions Using Deep Learning
Master-uppsats, KTH/Matematisk statistikSammanfattning : We study a class of It\={o} diffusion processes on domains with smooth boundary, at which the process is killed. Such a process, when conditioned on non-extinction, gives rise to a stationary state known as a \emph{quasistationary distribution} (QSD). LÄS MER
4. Computationally Efficient Methods in Topology Optimization
Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Hållfasthetslära; Lunds universitet/Institutionen för byggvetenskaperSammanfattning : In topology optimization, iterative, gradient-based methods are used to find the material distribution of structures which maximizes some objective function, typically the structures' stiffness, or in some cases the fundamental frequency. Finite element analysis is used to compute the structural response in each iteration, leading to large systems of equations. LÄS MER
5. Embedded eigenvalues for asymptotically periodic ODE Systems
Master-uppsats, Lunds universitet/Matematik LTHSammanfattning : In this thesis we investigate the persistance of embedded eigenvalues under perturbations of a certain self-adjoint Schrödinger-type differential operator in L^2(\mathbb{R},\mathbb{R}^n), with an asymptotically periodic potential. The studied perturbations are small and belong to a certain Banach space with a specified decay rate, in particular, a weighted space of continuous matrix valued functions. LÄS MER