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

Building a bidirectional LSTM

So far, we have trained and tested a simple RNN model on the sentiment analysis task, which is a binary classification task based on textual data. In this section, we will try to improve our performance on the same task by using a more advanced recurrent architecture – LSTMs.

LSTMs, as we know, are more capable of handling longer sequences due to their memory cell gates, which help retain important information from several time steps before and forget irrelevant information even if it was recent. With the exploding and vanishing gradients problem in check, LSTMs should be able to perform well when processing long movie reviews.

Moreover, we will be using a bidirectional model as it broadens the context window at any time step for the model to make a more informed decision about the sentiment of the movie review. The RNN model we looked at in the previous exercise overfitted the dataset during training, so to tackle that, we will be using dropouts...