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. 2019 Feb 25;64(4):937–949. doi: 10.1007/s00466-019-01688-1

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© The Author(s) 2019

OpenAccessThis 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.

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Fig. 5 — A comparison between different noise intensify measure, i.e., $σ = 0$ (top left), $σ = 0.1$ (top right), $σ = 0.2$ (bottom left) and $σ = 0.3$ (bottom right) at $T = 1$