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    Landscape Aware Algorithm Configuration

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    Brock_Dennis_Cody_2021.pdf
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    Author
    Dennis, Cody
    Keyword
    Fitness Landscape Analysis
    Algorithm Configuration
    Particle Swarm Optimization
    Parameter Tuning
    Parameter Control
    
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    URI
    http://hdl.handle.net/10464/15482
    Abstract
    The issue of parameter selection cannot be ignored if optimal performance is to be obtained from an algorithm on a specific problem or if a collection of algorithms are going to be compared in a fair manner. Unfortunately, adequately addressing the issue of parameter selection is time consuming and computationally expensive. Searching for appropriate control parameters generally requires much more time than actually solving the problem at hand due to the need to perform many complete runs of the target algorithm. The number of runs required to obtain thorough and equal coverage of the parameter space grows exponentially with the number of parameters. As a result, costs associated with parameter selection become a limiting factor in the scale of problems that can be investigated. The primary goal of this work is to reduce the costs of parameter selection. In pursuit of this goal, this thesis examines the use of neural networks to intelligently select appropriate control parameter values based on the characteristics of the problem at hand. Two general purpose approaches are evaluated: one that predicts a single set of control parameters to use throughout a run of the target algorithm; and, another that dynamically adjusts algorithm control parameters at run time. These approaches are examined in detail using the Particle Swarm Optimization algorithm. A comparison with state of the art automated tools for control parameter selection indicates that the cost of parameter selection can be significantly reduced.
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