Book Image

Deep Learning with TensorFlow and Keras – 3rd edition - Third Edition

By : Amita Kapoor, Antonio Gulli, Sujit Pal
5 (2)
Book Image

Deep Learning with TensorFlow and Keras – 3rd edition - Third Edition

5 (2)
By: Amita Kapoor, Antonio Gulli, Sujit Pal

Overview of this book

Deep Learning with TensorFlow and Keras teaches you neural networks and deep learning techniques using TensorFlow (TF) and Keras. You'll learn how to write deep learning applications in the most powerful, popular, and scalable machine learning stack available. TensorFlow 2.x focuses on simplicity and ease of use, with updates like eager execution, intuitive higher-level APIs based on Keras, and flexible model building on any platform. This book uses the latest TF 2.0 features and libraries to present an overview of supervised and unsupervised machine learning models and provides a comprehensive analysis of deep learning and reinforcement learning models using practical examples for the cloud, mobile, and large production environments. This book also shows you how to create neural networks with TensorFlow, runs through popular algorithms (regression, convolutional neural networks (CNNs), transformers, generative adversarial networks (GANs), recurrent neural networks (RNNs), natural language processing (NLP), and graph neural networks (GNNs)), covers working example apps, and then dives into TF in production, TF mobile, and TensorFlow with AutoML.
Table of Contents (23 chapters)
21
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22
Index

Backpropagation

Now that we have computed the derivative of the activation functions, we can describe the backpropagation algorithm — the mathematical core of deep learning. Sometimes, backpropagation is called backprop for short.

Remember that a neural network can have multiple hidden layers, as well as one input layer and one output layer.

In addition to that, recall from Chapter 1, Neural Network Foundations with TF, that backpropagation can be described as a way of progressively correcting mistakes as soon as they are detected. In order to reduce the errors made by a neural network, we must train the network. The training needs a dataset including input values and the corresponding true output value. We want to use the network for predicting output as close as possible to the true output value. The key intuition of the backpropagation algorithm is to update the weights of the connections based on the measured error at the output neuron(s). In the remainder of this...