Neural Network Based Machine Learning Techniques
摘要
A valuable introduction to neural networks can be found in [1], with numerous variants revisited in the next sections, enabling the construction of nonlinear regressions operating on different typologies of data (lists, images, graphs, time series, ...). Deep-learning is based on the use of neural networks, NN, with several layers (hence the adjective “deep”). Roughly speaking, NNs take some input data and generate an output, after transiting throughout the different neurons of the different layers. To describe NNs in more detail, take a look to the sketch in Fig. 20.1. This simple (the simplest, in fact) artificial neuron receives two input data, \(x_1\) and \(x_2\) , and produces an output y.