Book Image

Hands-On Natural Language Processing with PyTorch 1.x

By : Thomas Dop
Book Image

Hands-On Natural Language Processing with PyTorch 1.x

By: Thomas Dop

Overview of this book

In the internet age, where an increasing volume of text data is generated daily from social media and other platforms, being able to make sense of that data is a crucial skill. With this book, you’ll learn how to extract valuable insights from text by building deep learning models for natural language processing (NLP) tasks. Starting by understanding how to install PyTorch and using CUDA to accelerate the processing speed, you’ll explore how the NLP architecture works with the help of practical examples. This PyTorch NLP book will guide you through core concepts such as word embeddings, CBOW, and tokenization in PyTorch. You’ll then learn techniques for processing textual data and see how deep learning can be used for NLP tasks. The book demonstrates how to implement deep learning and neural network architectures to build models that will allow you to classify and translate text and perform sentiment analysis. Finally, you’ll learn how to build advanced NLP models, such as conversational chatbots. By the end of this book, you’ll not only have understood the different NLP problems that can be solved using deep learning with PyTorch, but also be able to build models to solve them.
Table of Contents (14 chapters)
1
Section 1: Essentials of PyTorch 1.x for NLP
7
Section 3: Real-World NLP Applications Using PyTorch 1.x

Exploring CBOW

The continuous bag-of-words (CBOW) model forms part of Word2Vec – a model created by Google in order to obtain vector representations of words. By running these models over a very large corpus, we are able to obtain detailed representations of words that represent their semantic and contextual similarity to one another. The Word2Vec model consists of two main components:

  • CBOW: This model attempts to predict the target word in a document, given the surrounding words.
  • Skip-gram: This is the opposite of CBOW; this model attempts to predict the surrounding words, given the target word.

Since these models perform similar tasks, we will focus on just one for now, specifically CBOW. This model aims to predict a word (the target word), given the other words around it (known as the context words). One way of accounting for context words could be as simple as using the word directly before the target word in the sentence to predict the target word, whereas...