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Neural Networks with Keras Cookbook

You're reading from   Neural Networks with Keras Cookbook Over 70 recipes leveraging deep learning techniques across image, text, audio, and game bots

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Product type Paperback
Published in Feb 2019
Publisher Packt
ISBN-13 9781789346640
Length 568 pages
Edition 1st Edition
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Authors (2):
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V Kishore Ayyadevara V Kishore Ayyadevara
Author Profile Icon V Kishore Ayyadevara
V Kishore Ayyadevara
Srinivas Pradeep Srinivas Pradeep
Author Profile Icon Srinivas Pradeep
Srinivas Pradeep
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Toc

Table of Contents (18) Chapters Close

Preface 1. Building a Feedforward Neural Network 2. Building a Deep Feedforward Neural Network FREE CHAPTER 3. Applications of Deep Feedforward Neural Networks 4. Building a Deep Convolutional Neural Network 5. Transfer Learning 6. Detecting and Localizing Objects in Images 7. Image Analysis Applications in Self-Driving Cars 8. Image Generation 9. Encoding Inputs 10. Text Analysis Using Word Vectors 11. Building a Recurrent Neural Network 12. Applications of a Many-to-One Architecture RNN 13. Sequence-to-Sequence Learning 14. End-to-End Learning 15. Audio Analysis 16. Reinforcement Learning 17. Other Books You May Enjoy

Introduction

In the traditional approach of solving text-related problems, we would one-hot encode the word. However, if the dataset has thousands of unique words, the resulting one-hot-encoded vector would have thousands of dimensions, which is likely to result in computation issues. Additionally, similar words will not have similar vectors in this scenario. Word2Vec is an approach that helps us to achieve similar vectors for similar words.

To understand how Word2Vec is useful, let's explore the following problem.

Let's say we have two input sentences:

Intuitively, we know that enjoy and like are similar words. However, in traditional text mining, when we one-hot encode the words, our output looks as follows:

Notice that one-hot encoding results in each word being assigned a column. The major issue with one-hot encoding such as this is that the Eucledian distance...

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