Sökning: "Convex layers"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Convex layers.

1. 1. New Results on Combinatorial Algorithms

   Författare :Anders Dessmark; Data Vetenskap; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sorting; Subgraph isomorphism; Partial k-trees; computer technology; Time complexity; Parallel computation; Data- och systemvetenskap; Convex layers; Systems engineering; Broadcasting;

   Sammanfattning : In this thesis improved upper bounds for several important combinatorial problems are provided. Below is a list of the main results showed in the thesis. The problem of determining whether a k-connected partial k-tree is isomorphic to subgraph of another partial k-tree is shown to be solvable in time O(nk+2). LÄS MER

3. 2. The effect of surface morphology on bed particle layer characteristics in fluidized bed combustion and gasification of woody biomass

   Författare :Ali Valizadeh; Marcus Öhman; Mikael Thyrel; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

   Sammanfattning : A critical process phenomenon in fluidized bed combustion and gasification is the bed particle layer formation which might be problematic in cases where it instigates bed agglomeration and bed material deposition or could improve the process performance in cases where it has a positive effect on tar reduction in biomass gasification. The interactions between ash forming matter for a wide variety of wood-derived fuels with different types of bed materials in fluidized bed combustion and gasification have been profusely studied, and the underlying mechanism of bed particle layer formation has been suggested. LÄS MER

4. 3. Distributed resource allocation in networked systems using decomposition techniques

   Författare :Björn Johansson; Mikael Johansson; Daniel Palomar; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

   Sammanfattning : The Internet and power distribution grids are examples of ubiquitous systems that are composed of subsystems that cooperate using a communication network. We loosely define such systems as networked systems. These systems are usually designed by using trial and error. LÄS MER

5. 4. Cross-layer optimization of wireless multi-hop networks

   Författare :Pablo Soldati; Mikael Johansson; Peter Marbach; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

   Sammanfattning : The interest in wireless communications has grown constantly for the past decades, leading to an enormous number of applications and services embraced by billions of users. In order to meet the increasing demand for mobile Internet access, several high data-rate radio networking technologies have been proposed to offer wide area high-speed wireless communications, eventually replacing fixed (wired) networks for many applications. LÄS MER

7. 5. Control over Low-Rate Noisy Channels

   Författare :Lei Bao; Mikael Skoglund; Sandro Zampier; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sensor networks; linear quadratic cost; stochastic control; joint source–channel coding; joint coding and control; rate allocation; soft source de- coding; Telecommunication; Telekommunikation;

   Sammanfattning : Networked embedded control systems are present almost everywhere. A recent trendis to introduce radio communication in these systems to increase mobility and flex-ibility. LÄS MER