June 2018
Intermediate to advanced
546 pages
13h 30m
English
book
Deep Reinforcement Learning Hands-On
by Oleg Vasilev, Maxim Lapan, Martijn van Otterlo, Mikhail Yurushkin, Basem O. F. Alijla
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A2C using ACKTR
The third method that we'll compare uses a different approach to address SGD stability. In the paper by Yuhuai Wu and others called Scalable Trust-Region Method for Deep Reinforcement Learning Using Kronecker-Factored Approximation published in 2017 (arXiv:1708.05144), the authors combined the second-order optimization methods and trust region approach.
The idea of the second-order methods is to improve the traditional SGD by taking the second-order derivatives of the optimized function (in other words, its curvature) to improve the convergence of the optimization process. To make things more complicated, working with the second derivatives usually requires you to build and invert a Hessian matrix, which can be prohibitively large, ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.