# American Institute of Mathematical Sciences

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On the basic reproduction number $R_0$ in sexual activity models for HIV/AIDS epidemics: Example from Yunnan, China
2007, 4(4): 609-615. doi: 10.3934/mbe.2007.4.609

## Improved integrate-and-fire model for RSA

 1 Istituto di Biofisica, CNR, Via G. Moruzzi 1, 56124 - Pisa, Italy, Italy 2 Istituto di Fisiologia Clinica, CNR, Via G. Moruzzi 1, 56124 - Pisa, Italy

Received  November 2006 Revised  July 2007 Published  August 2007

A simple operational model of heart rate variability is described, accounting in particular for the respiratory sinus arrhythmia, and is fitted to some interbeat interval sequences recorded from normal subjects at rest. The model performance is evaluated using a test based on the nonlinear prediction approach. Moreover, a short comparative account of two similar models described in the literature is given.
Citation: Michele Barbi, Angelo Di Garbo, Rita Balocchi. Improved integrate-and-fire model for RSA. Mathematical Biosciences & Engineering, 2007, 4 (4) : 609-615. doi: 10.3934/mbe.2007.4.609
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