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Deep Learning with Theano

You're reading from Deep Learning with Theano Perform large-scale numerical and scientific computations efficiently

Product type Paperback

Published in Jul 2017

Publisher Packt

ISBN-13 9781786465825

Length 300 pages

Edition 1st Edition

Tools

Theano

Concepts

Deep Learning

Author (1):

Christopher Bourez

View More author details

Table of Contents (15) Chapters

Preface

1. Theano Basics FREE CHAPTER

2. Classifying Handwritten Digits with a Feedforward Network

3. Encoding Word into Vector

4. Generating Text with a Recurrent Neural Net

5. Analyzing Sentiment with a Bidirectional LSTM

6. Locating with Spatial Transformer Networks

7. Classifying Images with Residual Networks

8. Translating and Explaining with Encoding – decoding Networks

9. Selecting Relevant Inputs or Memories with the Mechanism of Attention

10. Predicting Times Sequences with Advanced RNN

11. Learning from the Environment with Reinforcement

12. Learning Features with Unsupervised Generative Networks

13. Extending Deep Learning with Theano

Index

Generative models

A generative model in neural processing is a model that generates data given a noise vector z as input:

Generative models

The purpose of the training is to find the parameters to generate data as close as possible to the real data.

Applications of generative networks include data dimensionality reduction, synthetic data generation, unsupervised feature learning, and pre-training / training efficiency. Pre-training helps generalization because pre-training focuses on the patterns in the data, and less on the data-label relation.

Restricted Boltzmann Machines

A Restricted Boltzmann Machine is the simplest generative net, composed of one fully connected hidden layer, as shown in the picture:

Restricted Boltzmann Machines

The full Boltzmann Machines have also hidden-to-hidden and visible-to-visible loop connections, while the Restricted version does not have any.

In the general case, RBM are defined as energy-based models, which means that they define a probability distribution through an energy function:

Restricted Boltzmann Machines

Restricted Boltzmann Machines

Z is the partition...

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Authors (1)

Bourez

Bourez

Christopher Bourez graduated from Ecole Polytechnique and Ecole Normale Suprieure de Cachan in Paris in 2005 with a Master of Science in Math, Machine Learning and Computer Vision (MVA). For 7 years, he led a company in computer vision that launched Pixee, a visual recognition application for iPhone in 2007, with the major movie theater brand, the city of Paris and the major ticket broker: with a snap of a picture, the user could get information about events, products, and access to purchase. While working on missions in computer vision with Caffe, TensorFlow or Torch, he helped other developers succeed by writing on a blog on computer science. One of his blog posts, a tutorial on the Caffe deep learning technology, has become the most successful tutorial on the web after the official Caffe website. On the initiative of Packt Publishing, the same recipes that made the success of his Caffe tutorial have been ported to write this book on Theano technology. In the meantime, a wide range of problems for Deep Learning are studied to gain more practice with Theano and its application.

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