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Visar resultat 1 - 5 av 100 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Optimization of low-cost integration of wind and solar power in multi-node electricity systems: Mathematical modelling and dual solution approaches

   Författare :Caroline Granfeldt; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; variable renewable electricity; Lagrangian relaxation; ADMM; electricity system modelling; variable splitting; capacity expansion; cost optimization; variation management; consensus algorithm; subgradient algorithm;

   Sammanfattning : The global production of electricity contributes significantly to the release of CO2 emissions. Therefore, a transformation of the electricity system is of vital importance in order to restrict global warming. LÄS MER

3. 2. Optimization, Design, and Analysis of Flexible-Grid Optical Networks with Physical-Layer Constraints

   Författare :Li Yan; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GN model; optimization; resource allocation; Flexible-grid optical network; heuristic algorithm; DCNs; regenerator location;

   Sammanfattning : The theme of this thesis is the optimization, design, and analysis of flexible-grid optical networks that are constrained by physical-layer impairments (PLIs). We consider three flexible-grid network scenarios. LÄS MER

4. 3. On some sparsity related problems and the randomized Kaczmarz algorithm

   Författare :Liang Dai; Kristiaan Pelckmans; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering with specialization in Signal Processing; Elektroteknik med inriktning mot signalbehandling;

   Sammanfattning : This thesis studies several problems related to recovery and estimation. Specifically, these problems are about sparsity and low-rankness, and the randomized Kaczmarz algorithm. This thesis includes four papers referred to as Paper A, Paper B, Paper C, and Paper D. LÄS MER

5. 4. Advances in Functional Decomposition: Theory and Applications

   Författare :Andrés Martinelli; Elena Dubrova; Jon Muzio; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; computer science; electronic system design; Boolean decomposition; binary decision diagram; logic synthesis; graph algorithm; Computer science; Datavetenskap;

   Sammanfattning : Functional decomposition aims at finding efficient representations for Boolean functions. It is used in many applications, including multi-level logic synthesis, formal verification, and testing. This dissertation presents novel heuristic algorithms for functional decomposition. LÄS MER

7. 5. Development of New Methods for Inferring and Evaluating Phylogenetic Trees

   Författare :Tobias Hill; Helgi Schiöth; Robert Fredriksson; Mark Wilkinson; Uppsala universitet; []
   Nyckelord :Pharmacology; Evolution; Phylogeny; SPR; Genetic Algorithm; Tree metrics; Farmakologi;

   Sammanfattning : Inferring phylogeny is a difficult computational problem. Heuristics are necessary to minimize the time spent evaluating non optimal trees. In paper I, we developed an approach for heuristic searching, using a genetic algorithm. Genetic algorithms mimic the natural selections ability to solve complex problems. LÄS MER