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. 2017 Mar 29;17(4):712. doi: 10.3390/s17040712

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Relationship between $λ$ and $σ$ on JAFFE database; (b) Relationship between $λ$ and recognition rates from different classifiers on JAFFE database.