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Definition of "backpropagation algorithm" |
a supervised learning algorithm that uses a form of steepest descent to assign changes to the weights in a feedforward network so as to reduce the network error for a particular input or set of inputs. Calculation of the modifications to be made to the weights in the output layer allows calculation of the required modifications in the preceding layer, and modifications to any further preceding layers are made a layer at a time proceeding backwards toward the input layer; hence the name of the algorithm. |
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