Book Image

Neural Networks with Keras Cookbook

By : V Kishore Ayyadevara
Book Image

Neural Networks with Keras Cookbook

By: V Kishore Ayyadevara

Overview of this book

This book will take you from the basics of neural networks to advanced implementations of architectures using a recipe-based approach. We will learn about how neural networks work and the impact of various hyper parameters on a network's accuracy along with leveraging neural networks for structured and unstructured data. Later, we will learn how to classify and detect objects in images. We will also learn to use transfer learning for multiple applications, including a self-driving car using Convolutional Neural Networks. We will generate images while leveraging GANs and also by performing image encoding. Additionally, we will perform text analysis using word vector based techniques. Later, we will use Recurrent Neural Networks and LSTM to implement chatbot and Machine Translation systems. Finally, you will learn about transcribing images, audio, and generating captions and also use Deep Q-learning to build an agent that plays Space Invaders game. By the end of this book, you will have developed the skills to choose and customize multiple neural network architectures for various deep learning problems you might encounter.
Table of Contents (18 chapters)

Performing vector arithmetic using pre-trained word vectors

In the previous section, one of the limitations that we saw is that the number of sentences is too small for us to build a model that is robust (we saw that the correlation of month and year is around 0.4 in the previous section, which is relatively low, as they belong to the same type of words).

To overcome this scenario, we will use the word vectors trained by Google. The pre-trained word vectors from Google include word vectors for a vocabulary of 3,000,000 words and phrases that were trained on words from Google News dataset.

How to do it...

  1. Download the pre-trained word vectors from Google News (the code file is available as word2vec.ipynb in GitHub):
$wget...