منابع مشابه
Punctuated Equilibria in Publishing
Some species change little over long periods and then suddenly (at least on geological timescales) yield evolutionary innovations or diversify in creating new species. This herky-jerky relationship between time and change is known in evolutionary terms as punctuated equilibrium. Take, for instance, two extremes: the royal fern and the African cichlid fish. A time-traveling biologist visiting th...
متن کاملPunctuated Equilibria in Genetic Search
A bstract. We introd uce a formaliza tion of a simple genetic algori thm. Mathemati cally, two mat rices F and M determine select ion and recombination operators. Fixed points and their stability for these operators ar e investiga ted in terms of the eigenvalues of the associated matrices. We apply our results to one-po int crossover wit h muta tion to illustrate how the interaction between the...
متن کاملTransposable elements and an epigenetic basis for punctuated equilibria.
Evolution is frequently concentrated in bursts of rapid morphological change and speciation followed by long-term stasis. We propose that this pattern of punctuated equilibria results from an evolutionary tug-of-war between host genomes and transposable elements (TEs) mediated through the epigenome. According to this hypothesis, epigenetic regulatory mechanisms (RNA interference, DNA methylatio...
متن کاملAn Analysis of Punctuated Equilibria in Simple Genetic Algorithms
In the running of a genetic algorithm, the population is liable to be con ned in the local optimum, that is the metastable state, making an equilibrium. It is known that, after a long time, the equilibrium is punctuated suddenly and the population transits into the better neighbor optimum. We adopt the formalization of Computational Ecosystems to show that the dynamics of the Simple Genetic Alg...
متن کاملPunctuated Equilibria in Simple Genetic Algorithms for Functions of Unitation
During a genetic search, the population may get stuck in a local optimum. The population can escape from this after a long duration. This phenomenon is called punctuated equilibrium. The punctuated equilibria observed in nature and computational ecosystems are known to be well described by diffusion equations. In this paper, simple genetic algorithms are theoretically analyzed to show that they...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2008
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.3806