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GECCO '96 Proceedings of the 1st annual conference on Genetic and evolutionary computation
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Aflatoxin contamination in peanut crops is a problemof significant health and financial importance. Predicting aflatoxinlevels prior to crop harvest is useful for minimizing the impact of acontaminated crop and is the goal of our research. Backpropagationneural networks have been used to model problems of this type,however development of networks poses the complex problem of settingvalues for architectural features and backpropagationparameters. Genetic algorithms have been used in other studies todetermine parameters for backpropagation neural networks. This paperdescribes the development of a genetic algorithm/backpropagationneural network hybrid (GA/BPN) in which a genetic algorithm is usedto find architectures and backpropagation parameter valuessimultaneously for a backpropagation neural network that predictsaflatoxin contamination levels in peanuts based on environmentaldata. Learning rate, momentum, and number of hidden nodes are theparameters that are set by the genetic algorithm. A three-layerfeed-forward network with logistic activation functions is used.Inputs to the network are soil temperature, drought duration, cropage, and accumulated heat units. The project showed that the GA/BPNapproach automatically finds highly fit parameter sets forbackpropagation neural networks for the aflatoxin problem.