Sökning: "Evolution algorithm"

Visar resultat 1 - 5 av 126 avhandlingar innehållade orden Evolution algorithm.

  1. 1. 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

  3. 2. Inference of Hierarchical Structure in Complex Systems

    Författare :Olof Görnerup; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Protein evolution; Substitution groups; Modularity; Hierarchical dynamics; RNA world; Genetic code; Aggregation; Primordial evolution; Molecular evolution; Model reduction; Self-organization; Lumping; Emergence; Coarse graining;

    Sammanfattning : Hierarchical organization is a central property of complex systems. It is even argued that a system is required to be hierarchical in order to evolve complexity within reasonable time. A hierarchy of a system is defined as the set of self-contained levels at which the system operates and can be described on. LÄS MER

  4. 3. Computational problems in evolution : Multiple alignment, genome rearrangements, and tree reconstruction

    Författare :Isaac Elias; Jens Lagergren; Lior Pachter; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Distance Methods; Tree reconstruction; Sorting by Transpositions; multiple alignment; ancestral sequences; Computer science; Datavetenskap;

    Sammanfattning : Reconstructing the evolutionary history of a set of species is a fundamental problem in biology. This thesis concerns computational problems that arise in different settings and stages of phylogenetic tree reconstruction, but also in other contexts. LÄS MER

  5. 4. Enhancing Differential Evolution Algorithm for Solving Continuous Optimization Problems

    Författare :Miguel Leon; Ning Xiong; Yigen Zenlander; Peter Funk; Ronnie Johansson; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer Science; datavetenskap;

    Sammanfattning : Differential Evolution (DE) has become one of the most important metaheuristics during the recent years, obtaining attractive results in solving many engineering optimization problems. However, the performance of DE is not always strong when seeking optimal solutions. It has two major problems in real world applications. LÄS MER

  7. 5. Meso-Mechanical Modeling and Analysis of Adhesive Layers

    Författare :Kent Salomonsson; Ulf Stigh; Per Ståhle; Högskolan i Skövde; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adhesive layer; Meso-mechanical; Representative Volume Element; Large curvatures; Interphase elements; Evolution algorithm; Engineering mechanics; Teknisk mekanik; Technology; Teknik;

    Sammanfattning : This thesis is concerned with the modeling, simulation and analysis of adhesive layers. By use of an in situ scanning electron microscopy study it is found that the adhesive studied in the present thesis has a very complex structure with two different compounds, a mineral and an epoxy/thermoplastic blend. LÄS MER