Sökning: "free boundary problem"
Visar resultat 1 - 5 av 29 uppsatser innehållade orden free boundary problem.
1. Symmetry in a free boundary problem
Master-uppsats, KTH/Matematik (Avd.)Sammanfattning : We consider a variational formulation of a Bernoulli-type free boundary problem for the Laplacian operator with discontinuous boundary data. We show the existence of a weak solution to the problem. Moreover, we show that the solution has symmetry properties inherited by symmetric data. LÄS MER
2. Evaluation of Physics Informed Neural Networks in engineering simple structural analysis problems
Master-uppsats, Uppsala universitet/Institutionen för informationsteknologiSammanfattning : Neural Networks have found many applications for a long time in Machine Learning in different disciplines, and have especially flourished in the last decade because of the ever-increasing processing power especially from GPUs. Because of their ability to operate as universal function approximators and model nonlinear processes, attempts have been made in recent years to be also used for modeling partial differential equation (PDE) solutions. LÄS MER
3. Gravity water waves over constant vorticity flows: from laminar flows to touching waves
Master-uppsats, Lunds universitet/Matematik (naturvetenskapliga fakulteten); Lunds universitet/MatematikcentrumSammanfattning : In a recent paper, Hur and Wheeler proved the existence of periodic steady water waves over an infinitely deep, two-dimensional and constant vorticity flow and subject to gravity whose profile overhangs, among which, waves whose surface touches at a point, enclosing a bubble of air. We take this further, proving the existence of a continuous curve of water waves from a laminar flow up to a touching wave for fixed non-zero gravity. LÄS MER
4. Value of decision control mechanisms in avoiding free cash flow drawbacks in the first place
Magister-uppsats, Lunds universitet/Företagsekonomiska institutionenSammanfattning : This thesis examines the utilization of internal controls as means of facilitating effective use of free cash flow (FCF) by managers, with the aim of preventing potential issues that may distort their relationship with shareholders. The objective was to understand the means of mitigating FCF issues by identifying internal controls within the companies to guarantee the effective utilization of cash available while aligning decision making with companies’ strategy and performance. LÄS MER
5. Influence of hydrogen and carbides on high temperature cracking in cast Inconel
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad mekanikSammanfattning : Hydrogen embrittlement is a well-known source of cracking in metallic mechanical elements. This work studies the influence of hydrogen and carbides on the crack formation in a castnickel-alloy-component in a selective catalytic reduction system. LÄS MER