Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2018 Nov 5;11(1):13–25. doi: 10.1080/19420862.2018.1532766

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2018 The Author(s). Published by Taylor & Francis Group, LLC

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.

PMC Copyright notice

y = α - \frac{δ}{1 + 10^{β (l o g_{10} x - l o g_{10} γ)}}

(2)