Un multilayer réseau feedforward (MLFN) is a structured modèle de réseau neuronal comprised of an couche d'entrée, one or more hidden layers, and an couche de sortie. Each node, or neuron, in these layers is connected to the nodes in the adjacent layers, allowing for complex traitement des données. The network operates by receiving inputs through the input layer, passing these inputs through hidden layers where they undergo transformations, and producing outputs in the output layer.
In a multilayer feedforward network, the information flows in one direction—from the input nodes to the output nodes—without any backward connections. This architecture is essential for learning complex patterns in data, making it particularly useful for tasks such as classification, regression, and function approximation. Each neuron applies an fonction d'activation to its inputs, which determines whether it should be activated or not, contributing to the network’s ability to model non-linear relationships.
Training a multilayer feedforward network typically involves using a method called backpropagation, which adjusts the weights of the connections based on the error of the predicted outputs compared to the actual outputs. This iterative process helps the network learn to make accurate predictions over time. With sufficient data and proper tuning of parameters such as learning rate and activation functions, multilayer feedforward networks can achieve high performance across a variety of applications in intelligence artificielle.