Book Image

Mastering PyTorch

By : Ashish Ranjan Jha
Book Image

Mastering PyTorch

By: Ashish Ranjan Jha

Overview of this book

Deep learning is driving the AI revolution, and PyTorch is making it easier than ever before for anyone to build deep learning applications. This PyTorch book will help you uncover expert techniques to get the most out of your data and build complex neural network models. The book starts with a quick overview of PyTorch and explores using convolutional neural network (CNN) architectures for image classification. You'll then work with recurrent neural network (RNN) architectures and transformers for sentiment analysis. As you advance, you'll apply deep learning across different domains, such as music, text, and image generation using generative models and explore the world of generative adversarial networks (GANs). You'll not only build and train your own deep reinforcement learning models in PyTorch but also deploy PyTorch models to production using expert tips and techniques. Finally, you'll get to grips with training large models efficiently in a distributed manner, searching neural architectures effectively with AutoML, and rapidly prototyping models using PyTorch and fast.ai. By the end of this PyTorch book, you'll be able to perform complex deep learning tasks using PyTorch to build smart artificial intelligence models.
Table of Contents (20 chapters)
1
Section 1: PyTorch Overview
4
Section 2: Working with Advanced Neural Network Architectures
8
Section 3: Generative Models and Deep Reinforcement Learning
13
Section 4: PyTorch in Production Systems

Reviewing reinforcement learning concepts

In a way, RL can be defined as learning from mistakes. Instead of getting the feedback for every data instance, as is the case with supervised learning, the feedback is received after a sequence of actions. The following diagram shows the high-level schematic of an RL system:

Figure 9.1 – Reinforcement learning schematic

Figure 9.1 – Reinforcement learning schematic

In an RL setting, we usually have an agent, which does the learning. The agent learns to make decisions and take actions according to these decisions. The agent operates within a provided environment. This environment can be thought of as a confined world where the agent lives, takes actions, and learns from its actions. An action here is simply the implementation of the decision the agent makes based on what it has learned.

We mentioned earlier that unlike supervised learning, RL does not have an output for each and every input; that is, the agent does not necessarily receive a feedback...