Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 22 for “"Fitness functions."”.
-
Microevolutionary processes in natural populations of the waterstrider Aquarius remigis
… In this thesis I relate sex-specific fitness functions, opportunity for selection, and genetic correlations among body size components to the adaptive significance of SSD in the waterstrider Aquarius remigis . Laboratory studies have revealed significant genetic correlations among body …
-
Genetic Algorithm Stream Cipher Key Generation Using NIST Functions
… cipher when individual and combinations of fitness functions are used. Furthermore, this study identified which fitness function is the best for a specific scenario. For the genetic algorithm, the fitness tests are thirteen of the tests defined in NIST SP 800-22rla. The thirteen different …
-
Noise, Sampling, and Efficient Genetic Algorithms
… a noisy environments is investigated. Sampling fitness functions are explored, and techniques for determining the optimal sample size that maximizes the performance of a GA within a fixed computational time bound are presented.
-
Genetic Algorithm-Based Methodology for Unstructured Design of Truss Structures
… different kinds of design constraints; and a new fitness functions is developed that is able to handle various kinds of design objectives. The methodology is implemented as a software application. The methodology is demonstrated on some design examples and the results presented. The methodology is …
-
Classifying Imbalanced Financial Fraud Data Utilizing Enhanced Random Forest Algorithm
… optimizing several random forests on different fitness functions. These models are then combined to act as a sieve with increasing tolerance for low precision classifications. The effectiveness of random forest for financial fraud detection is also improved through feature extraction techniques. …
-
Sexual conflict and the evolution of nuptial feeding
… gifts is primarily carried by the male, net fitness of providing or receiving such gifts must be positive for both sexes, if these gifts are to be maintained in a population. If this is not the case, and sexual conflict has exerted a cost-benefit imbalance between the sexes, then the …
-
MRI brain tumour classification using image processing and data mining
… problems as with most other methods. Two fitness functions are defined to describe the features of medical data precisely. The superiority of image analysis methods in each part was demonstrated on synthetic images and real MR images. Classification rules of three types and two grades of …
-
The use of some non-minimal representations to improve the effectiveness of genetic algorithms
… unitation representation against a variety of fitness functions. However, the LVR preferentially converges towards the low end of phenotype space. The phenotype shift representation (PSR), which retains the ability of the LVR to select for attractors that are close to optima, whilst using a …
-
Automatic generation of sound synthesis techniques
… the mapping rules between both representations. Fitness functions that use analytical and perceptual distance metrics between the target and produced sounds are discussed. The AGeSS system (Automatic Generation of Sound Synthesizers) developed in the Media Lab is outlined, and some SSTs and their …
-
Emergent design and image processing : a case study
… the part of the designer. The use of preliminary fitness functions in the interactive genetic programming process allows the designer to specify heuristics to guide the search and manage the complexity of the interactive genetic programming task. This document is structured in the form of a case …
-
Improving Automated Android Test Generation
… intermediate restart operations as well as fitness evaluations. Since search-based algorithms require a substantial number of test executions to play out their strengths, the slow test execution impedes the effectiveness of the search. Third, the guidance offered by search-based algorithms …
-
Using signal processing, evolutionary computation, and machine learning to identify transposable elements in genomes
… detailed analysis of the genetic algorithm, its fitness functions, and its fitness landscapes is performed. The features are used, together with features used in existing exon finding algorithms, to build classifiers that distinguish TE's from other genomic sequences in humans, fruit flies, and …
-
The Automatic Generation of Software Test Data Using Genetic Algorithms
… branch in the software. The investigation uses fitness functions based on the Hamming distance between the expressions in the branch predicate and on the reciprocal of the difference between numerical expressions in the predicate. The input variables are represented in Gray code and as an image …
-
Antenna design using optimization techniques over various computaional electromagnetics. Antenna design structures using genetic algorithm, Particle Swarm and Firefly algorithms optimization methods applied on several electromagnetics numerical solutions and applications including antenna measurements and comparisons
… of small uni-planer Ultra- Wideband antenna. The fitness functions and the geometrical antenna elements required for such design are considered. Two antennas are designed, implemented and measured. The computed and measured outcomes are found in reasonable agreement. Secondly, the work is also …
-
Multivariate Markov networks for fitness modelling in an estimation of distribution algorithm.
… model contains explicit information about the fitness function. This thesis expands on recent work using a Markov network to model fitness in an EDA, resulting in what we call the Markov Fitness Model (MFM). The work has explored the theoretical foundations of the MFM approach which are …
-
Dynamic Signal Coordination Models for a Network With Oversaturated Intersections
… a number of processors (slaves) to evaluate GA's fitness functions. The microscopic simulation model, CORSIM, is used to validate the proposed signal coordination model. The results confirm that signal control and strategies developed within the framework of DSCM can be implemented, and the …
-
Information storage capacity of genetic algorithm fitness maps.
… the amount of information one can store, using a fitness map. The amount of information generated, minus the storage capacity, gives a tighter estimate on the levels of information generated by genetic algorithms. To measure the information storage capacity of fitness maps, we use the method …
-
Finding multi-step attacks in computer networks using heuristic search and mobile ambients
… attack steps into multi-step attacks, and (iii) fitness functions used by the search engine for the selection of attack steps among alternatives, according to automatically computed metrics. Similar to search engines that use the structure of the World Wide Web to score webpages, the MsAMS …
-
Going through the motions : the impacts of frequent fires and grazing pressure on reproduction of Montane grassland birds
… that preferences were adaptive. Estimation of fitness functions relating fitness of individuals to critical habitat features suggests that natural selection might favour preferences for specific habitat features. Although food abundance and thus amount of food available to populations of …
-
Modeling and Measuring Affordability as Fitness
… a broader concept of affordability – one of fitness to perform at the level of quality required by the consumer, to perform at that level whenever the product or service is used, and to do so with minimum consumption of resources. This concept of affordability is applied to technological …
Page 1 of 2