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Chapter 1. What is deep learning?

This chapter covers

  • High-level definitions of fundamental concepts
  • Timeline of the development of machine learning
  • Key factors behind deep learning’s rising popularity and future potential

In the past few years, artificial intelligence (AI) has been a subject of intense media hype. Machine learning, deep learning, and AI come up in countless articles, often outside of technology-minded publications. We’re promised a future of intelligent chatbots, self-driving cars, and virtual assistants—a future sometimes painted in a grim light and other times as utopian, where human jobs will be scarce and most economic activity will be handled by robots or AI agents. For a future or current practitioner of machine learning, it’s important to be able to recognize the signal in the noise so that you can tell world-changing developments from overhyped press releases. Our future is at stake, and it’s a future in which you have an active role to play: after reading this book, you’ll be one of those who develop the AI agents. So let’s tackle these questions: What has deep learning achieved so far? How significant is it? Where are we headed next? Should you believe the hype?

This chapter provides essential context around artificial intelligence, machine learning, and deep learning.

1.1. Artificial intelligence, machine learning, and deep learning

1.1.1. Artificial intelligence

1.1.2. Machine learning

1.1.3. Learning representations from data

1.1.4. The “deep” in deep learning

1.1.5. Understanding how deep learning works, in three figures

1.1.6. What deep learning has achieved so far

1.1.7. Don’t believe the short-term hype

1.1.8. The promise of AI

1.2. Before deep learning: a brief history of machine learning

1.2.1. Probabilistic modeling

1.2.2. Early neural networks

1.2.3. Kernel methods

1.2.4. Decision trees, random forests, and gradient boosting machines

1.2.5. Back to neural networks

1.2.6. What makes deep learning different

1.2.7. The modern machine-learning landscape

1.3. Why deep learning? Why now?

1.3.1. Hardware

1.3.2. Data

1.3.3. Algorithms

1.3.4. A new wave of investment

1.3.5. The democratization of deep learning

1.3.6. Will it last?

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