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Content Provider | ACM Digital Library |
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Author | McKinley, Philip K. Ofria, Charles Beckmann, Benjamin E. Clune, Jeff |
Abstract | HyperNEAT represents a class of neuroevolutionary algorithms that captures some of the power of natural development with a computationally efficient high-level abstraction of development. This class of algorithms is intended to provide many of the desirable properties produced in biological phenotypes by natural developmental processes, such as regularity, modularity and hierarchy. While it has been previously shown that HyperNEAT produces regular artificial neural network (ANN) phenotypes, in this paper we investigated the open question of whether HyperNEAT can produce modular ANNs. We conducted such research on problems where modularity should be beneficial, and found that HyperNEAT failed to generate modular ANNs. We then imposed modularity on HyperNEAT's phenotypes and its performance improved, demonstrating that modularity increases performance on this problem. We next tested two techniques to encourage modularity in HyperNEAT, but did not observe an increase in either modularity or performance. Finally, we conducted tests on a simpler problem that requires modularity and found that HyperNEAT was able to rapidly produce modular solutions that solved the problem. We therefore present the first documented case of HyperNEAT producing a modular phenotype, but our inability to encourage modularity on harder problems where modularity would have been beneficial suggests that more work is needed to increase the likelihood that HyperNEAT and similar algorithms produce modular ANNs in response to challenging, decomposable problems. |
Starting Page | 635 |
Ending Page | 642 |
Page Count | 8 |
File Format | |
ISBN | 9781450300728 |
DOI | 10.1145/1830483.1830598 |
Language | English |
Publisher | Association for Computing Machinery (ACM) |
Publisher Date | 2010-07-07 |
Publisher Place | New York |
Access Restriction | Subscribed |
Subject Keyword | Indirect encodings Developmental encodings Neuroevolution Artificial neural networks Hyperneat Generative encodings Modularity Neat |
Content Type | Text |
Resource Type | Article |
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