Random subsampling improves performance in lexicase selection
Random subsampling improves performance in lexicase selection
复制标题
随机子采样提高了词典选择的性能
DOI:
10.1145/3319619.3326900
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Ofria, Charles
中科院分区:
文献类型:
--
作者:
Hernandez, Jose Guadalupe;Lalejini, Alexander;Dolson, Emily;Ofria, Charles
Lexicase selection has been proven highly successful for finding effective solutions to problems in genetic programming, especially for test-based problems where there are many distinct test cases that must all be passed. However, lexicase (as with most selection schemes) requires all prospective solutions to be evaluated against most test cases each generation, which can be computationally expensive. Here, we propose reducing the number of per-generation evaluations required by applying random subsampling: using a subset of test cases each generation (down-sampling) or by assigning test cases to subgroups of the population (cohort assignment). Tests are randomly reassigned each generation, and candidate solutions are only ever evaluated on test cases that they are assigned to, radically reducing the total number of evaluations needed while ensuring that each lineage eventually encounters all test cases. We tested these lexicase variants on five different program synthesis problems, across a range of down-sampling levels and cohort sizes. We demonstrate that these simple techniques to reduce the number of per-generation evaluations in lexicase can substantially improve overall performance for equivalent computational effort.
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DOI:
--
发表时间:
2016
期刊:
INNS Conference on Big Data
影响因子:
--
作者:
Hmida Hmida;S. B. Hamida;A. Borgi;M. Rukoz
通讯作者:
M. Rukoz
影响因子:
3.9
作者:
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通讯作者:
L. Spector
DOI:
--
发表时间:
2017
期刊:
Journal of experimental and theoretical artificial intelligence (Print)
影响因子:
--
作者:
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通讯作者:
Uriel López
DOI:
10.1109/cec.2018.8477953
发表时间:
2018
期刊:
2018 IEEE Congress on Evolutionary Computation (CEC)
影响因子:
--
作者:
Stefan Forstenlechner;David Fagan;Miguel Nicolau;M. O’Neill
通讯作者:
M. O’Neill