Sökning: "Maximum principles"

Visar resultat 1 - 5 av 45 avhandlingar innehållade orden Maximum principles.

1. 1. Energy Constrained Wireless Sensor Networks : Communication Principles and Sensing Aspects

   Författare :Erik Björnemo; Anders Ahlén; Mikael Sternad; Erik Larsson; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wireless sensor network; communication under processing cost; wireless channels; fading; probability theory as logic; uncertainty; measurement capacity; Signal processing; Signalbehandling;

   Sammanfattning : Wireless sensor networks are attractive largely because they need no wired infrastructure. But precisely this feature makes them energy constrained, and the consequences of this hard energy constraint are the overall topic of this thesis. LÄS MER

3. 2. On Steady Water Waves and Their Properties

   Författare :Mats Ehrnström; Matematik (naturvetenskapliga fakulteten); []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Particle trajectories; Water waves; Vorticity; Maximum principles; Elliptic equations;

   Sammanfattning : Abstract: This thesis consists of four papers related to various aspects of steady water waves. Paper I: Deep-water waves with vorticity: symmetry and rotational behaviour. We show that for steady, periodic, and rotational gravity deep-water waves, a monotone surface profile between troughs and crests implies symmetry. LÄS MER

4. 3. Detection of Bio-analytes with Streaming Current : From Fundamental Principles to Novel Applications

   Författare :Siddharth S. Sahu; Apurba Dev; Shi-Li Zhang; Michel Calame; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Streaming current; Electrokinetic biosensor; Size and Charge effects; membrane protein profiling of extracellular vesicles; sandwich immunoassay; charge-labelled antibodies; multiplexed detection; exosome heterogeneity;

   Sammanfattning : A biosensor based on streaming current is a new and relatively unexplored subject with significant potential. This thesis attempts to gain a deeper understanding of the governing principles, and then exploit them to further improve its performance as well as develop novel applications. LÄS MER

5. 4. First-principles description of planarfaults in metals and alloys

   Författare :Wei Li; Levente Vitos; Ujfalassy Habil Balazs; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Phase interface and stacking fault are two common planar defects in metallic materials. In the present thesis, the interfacial energy and the generalized stacking fault energy of random alloys are investigated using density functional theory formulated within the exact muffin-tin orbitals (EMTO) method in combination with the coherent-potential approximation (CPA). LÄS MER

7. 5. Describing Interstitials in Close-packed Lattices: First-principles Study

   Författare :Noura Al-Zoubi; Levente Vitos; Se Kyun Kwon; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Describing interstitial atoms in intermetallics or simple mono-atomic close-packed metals is a straightforward procedure in common full-potential calculations. One establishes a sufficiently large supercell, introduces the interstitial impurity and performs the electronic structure and total energy calculation. LÄS MER