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  • Book Overview & Buying Python Deep Learning
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Python Deep Learning

Python Deep Learning

By : Valentino Zocca, Gianmario Spacagna, Daniel Slater, Peter Roelants
4.1 (10)
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Python Deep Learning

Python Deep Learning

4.1 (10)
By: Valentino Zocca, Gianmario Spacagna, Daniel Slater, Peter Roelants

Overview of this book

With an increasing interest in AI around the world, deep learning has attracted a great deal of public attention. Every day, deep learning algorithms are used broadly across different industries. The book will give you all the practical information available on the subject, including the best practices, using real-world use cases. You will learn to recognize and extract information to increase predictive accuracy and optimize results. Starting with a quick recap of important machine learning concepts, the book will delve straight into deep learning principles using Sci-kit learn. Moving ahead, you will learn to use the latest open source libraries such as Theano, Keras, Google's TensorFlow, and H20. Use this guide to uncover the difficulties of pattern recognition, scaling data with greater accuracy and discussing deep learning algorithms and techniques. Whether you want to dive deeper into Deep Learning, or want to investigate how to get more out of this powerful technology, you’ll find everything inside.
Table of Contents (12 chapters)
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11
Index

Asynchronous methods


We have seen a lot of interesting methods in this chapter, but they all suffer from the constraint of being very slow to train. This isn't such a problem when we are running on basic control problems, such as the cart-pole task. But for learning Atari games, or the even more complex human tasks that we might want to learn in the future, the days to weeks of training time are far too long.

A big part of the time constraint, for both policy gradients and actor-critic, is that when learning online, we can only ever evaluate one policy at a time. We can get significant speed improvements by using more powerful GPUs and bigger and bigger processors; the speed of evaluating the policy online will always act as a hard limit on performance.

This is the problem that asynchronous methods aim to solve. The idea is to train multiple copies of the same neural networks across multiple threads. Each neural network trains online against a separate instance of the environment running on...

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Python Deep Learning
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