Sökning: "mean field annealing"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden mean field annealing.
1. Variational Methods in Combinatorial Optimization and Phylogeny Reconstruction
Sammanfattning : Algorithms based on the variational approach, as used in statistical physics, are developed. For constraint satisfaction problems a novel cost function, based on information-theoretic arguments, is introduced, and an algorithm similar to the mean-field annealing algorithm is proposed. LÄS MER
2. Active Noise Control of Enclosed Sound Fields Optimising the Performance
Sammanfattning : Active noise control is the art of reducing a primary unwanted sound field by interference with an actively created secondary sound field. To achieve high reduction, it is crucial to obtain both temporal and spatial matching between the primary and the secondary sound fields. LÄS MER
3. Neural Network Ensembles and Combinatorial Optimization with Applications in Medicine
Sammanfattning : Artificial neural network (ANN) and combinatorial optimization algorithms are developed, and applied to the medical domain. A novel method for training an ensemble of ANN is presented, based on random weight updates alternated with replication of networks with low error. LÄS MER
4. Preparation and Characterization of the Magnetic Semiconductor (GaMn)As
Sammanfattning : The diluted ferromagnetic semiconductor (GaMn)As has been grown by low temperature molecular beam epitaxy and the effects of post growth treatments on the electronic, magnetic and structural properties have been studied. In situ low temperature annealing of (GaMn)As layers has been performed. LÄS MER
5. Ionic impacts on solids and sputtering phenomena : experiments in the low-keV region, using optical and collector methods
Sammanfattning : Energetic ions bombarding the surface of a solid result in a manifold of processes. An ion with sufficient energy can penetrate into the solid. The slowing-down process represents a transfer of energy to the lattice atoms. Part of this energy is deposited on the target surface and may result in sputtering, the release of particles from the target. LÄS MER