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Evolutionary Computation Concepts

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Fitness Function

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A function that quantifies the optimality of a solution in a genetic algorithm, often correlating to how 'fit' or 'well-adapted' a solution is within the given environment or problem space.

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Genetic Algorithm

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A class of optimization algorithms inspired by the process of natural selection, where potential solutions to a problem evolve through processes akin to crossover, mutation, and selection.

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Population

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In evolutionary computation, it refers to a collection of potential solutions evaluated in each iteration of the algorithm, where individuals can be selected for reproduction.

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Mutation

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An operator in evolutionary algorithms that introduces random alterations to the genetic representation of a solution to maintain diversity in the population and prevent premature convergence.

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Selection

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A process in genetic algorithms by which individuals are chosen based on their fitness scores to reproduce and populate the next generation, simulating the 'survival of the fittest' principle.

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Crossover

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A genetic operator used in genetic algorithms to combine the genetic information of two parents to generate new offspring with pieces of each parent's features.

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Gene

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The basic unit of the genetic representation in evolutionary algorithms, typically corresponding to a component of the solution or a variable in the optimization problem.

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Genotype

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The encoded genetic makeup of an individual solution within the context of genetic algorithms, exhibiting the traits or variables that are subjected to evolutionary operations.

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Chromosome

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In the context of genetic algorithms, a chromosome is a single string of genes, which encodes the solution to the problem that the algorithm is attempting to solve.

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Phenotype

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The actual expressed traits or the outward, physical manifestation of the genotype in an individual solution in genetic algorithms, seen through the solution's performance or behavior.

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Evolution Strategy

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A subset of evolutionary computation methods that primarily uses continuous parameter optimization, focusing on the adaptation of strategy parameters such as mutation rate, rather than emphasizing crossover.

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Elitism

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A technique used in genetic algorithms to ensure that the best individuals are preserved from generation to generation, thereby guaranteeing that the fitness of the population does not decrease.

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