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Hands-On Neuroevolution with Python

You're reading from   Hands-On Neuroevolution with Python Build high-performing artificial neural network architectures using neuroevolution-based algorithms

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Product type Paperback
Published in Dec 2019
Publisher Packt
ISBN-13 9781838824914
Length 368 pages
Edition 1st Edition
Languages
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Author (1):
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Iaroslav Omelianenko Iaroslav Omelianenko
Author Profile Icon Iaroslav Omelianenko
Iaroslav Omelianenko
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Table of Contents (18) Chapters Close

Preface 1. Section 1: Fundamentals of Evolutionary Computation Algorithms and Neuroevolution Methods FREE CHAPTER
2. Overview of Neuroevolution Methods 3. Python Libraries and Environment Setup 4. Section 2: Applying Neuroevolution Methods to Solve Classic Computer Science Problems
5. Using NEAT for XOR Solver Optimization 6. Pole-Balancing Experiments 7. Autonomous Maze Navigation 8. Novelty Search Optimization Method 9. Section 3: Advanced Neuroevolution Methods
10. Hypercube-Based NEAT for Visual Discrimination 11. ES-HyperNEAT and the Retina Problem 12. Co-Evolution and the SAFE Method 13. Deep Neuroevolution 14. Section 4: Discussion and Concluding Remarks
15. Best Practices, Tips, and Tricks 16. Concluding Remarks 17. Other Books You May Enjoy

Tuning hyperparameters

With proper tuning of the hyperparameters, you can make tremendous improvements in the training speed and efficiency of the neuroevolution process. Here are some practical tips:

  • Do short runs with different seed values of the random number generator and note how the algorithm performance changes. After that, choose the seed value that gives the best performance and use it for the long runs.
  • You can increase the number of species in the population by decreasing the compatibility threshold and by slightly increasing the value of the disjoint/excess weight coefficient.
  • If the process of neuroevolution has stumbled while trying to find a solution, try to decrease the value of the NEAT survival threshold. This coefficient maintains the ratio of the best organisms within a population that got the chance to reproduce. By doing this, you increase the quality of...
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