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. 2016 Jun 29;9:22. doi: 10.1186/s13040-016-0101-9

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© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 11 — Periodic fitting functions f(t) (left) and $f (t + \frac{T}{4})$ : sinusoidal (green), square (blue) and triangular (cyan) wave functions; colors correspond to those used in Fig. 9