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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2022.tde-29032023-145743
Document
Author
Full name
Felipe Nélio Souto de Souza
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2022
Supervisor
Committee
Osório, Fernando Santos (President)
Bianchi, Reinaldo Augusto da Costa
Delbem, Alexandre Cláudio Botazzo
Tinós, Renato
Title in Portuguese
Simulação de ecossistemas e de dinâmicas populacionais: proposta de um operador genético Elemento Estrangeiro"
Keywords in Portuguese
Algoritmo genético
Simulação, Elemento estrangeiro.
Sistema dinâmico,Dinâmica populacional
Abstract in Portuguese
Este trabalho se apoia em conhecimentos oriundos da biologia e da computação, além utilizar da técnica de simulação para analisar e discutir os efeitos de um operador genético, aqui denominado de Elemento Estrangeiro no contexto da teoria de Algoritmos Genéticos. Baseado uma ferramenta recriada a partir do Ecosim, trabalho de Connor Brooks, executam-se simulações de um ecossistema natural com co-evolução, um sistema dinâmico regido por regras de predação, competição por recursos, e com populações de indivíduos que buscam "sobreviver" ou "dominar" o ambiente onde se encontram. Neste ambiente é possível observar dinâmicas populacionais e como essas são influenciadas pelos parâmetros (características do ambiente). Partindo desse ponto foram encontradas condições nas quais ocorrem regimes de equilíbrio, os quais foram utilizados de base para analisar os impactos e perturbações dos operadores genéticos. Os resultados das análises com operador elemento estrangeiro demonstraram que o operador possui propriedades e um impacto interessante no ecossistema, tanto em termos de evolução e dinâmica, quanto em termos de variabilidade da população, porém, se diferenciando de operadores tradicionais, como é o caso do operador de mutação.
Title in English
Simulation of ecosystems and population dynamics: Proposal of a genetic operator Foreign Element
Keywords in English
Dynamic system
Foreign element
Genetic algorithm
Population dynamics
Simulation
Abstract in English
This work is based on knowledge from biology and computing, and uses the simulation technique to analyze and discuss the effects of a genetic operator, here called Foreign Element in the context of the theory of Genetic Algorithms. Based on a tool recreated from Ecosim, work by Connor Brooks, simulations are performed of a natural ecosystem with co-evolution, a dynamic system governed by rules of predation, competition for resources, and with populations of individuals that they seek to "survive" or "dominate" the environment in which they find themselves. In this environment it is possible to observe population dynamics and how these are influenced by parameters (environment characteristics). Starting from this point, conditions were found in which equilibrium regimes occur, which were used as a basis to analyze the impacts and perturbations of genetic operators. The results of the analyzis with the operator foreign element showed that the operator has interesting properties and impact on the ecosystem, both in terms of evolution and dynamics, and in terms of population variability, however, different from traditional operators, such as this is the case of the mutation operator.
 
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Publishing Date
2023-03-29
 
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