Cited by 94Control Systems and IdentificationNeural Networks and ApplicationsAdvanced Adaptive Filtering Techniques

Modeling methology for nonlinear physiological systems

Marmarelis, Vasilis Z.·1997·Annals of Biomedical Engineering

Abstract

A general modeling approach for a broad class of nonlinear systems is presented that uses the concept of principal dynamic modes (PDMs). These PDMs constitute a filter bank whose outputs feed into a multi-input static nonlinearity of multinomial (polynomial) form to yield a general model for the broad class of Volterra systems. Because the practically obtainable models (from stimulus-response data) are of arbitrary order of nonlinearity, this approach is applicable to many nonlinear physiological systems heretofore beyond our methodological means. Two specific methods are proposed for the estimation of these PDMs and the associated nonlinearities from stimulus-response data. Method I uses eigendecomposition of a properly constructed matrix using the first two kernel estimates (obtained by existing methods). Method II uses a particular class of feedforward artificial neural networks with polynomial activation functions. The efficacy of these two methods is demonstrated with computer-simulated examples, and their relative performance is discussed. The advent of this approach promises a practicable solution to the vexing problem of modeling highly nonlinear physiological systems, provided that experimental data be available for reliable estimation of the requisite PDMs.

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Crossref · 10.1007/bf02648038

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Authors
Marmarelis, V. Z.
Affiliations
University of Southern California (US)
Corresponding author
Marmarelis, Vasilis Z.
Venue
Annals of Biomedical Engineering
Published
1997-03
Volume
25
Issue
2
Pages
239-251
ISSN
  • 0090-6964 (ISSN-L)
  • 1573-9686
OpenAlex
W1227425701
Cited by
94
References
18
Citations by year
2024: 1 · 2023: 3 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 4 · 2017: 7 · 2016: 7 · 2015: 2 · 2014: 4 · 2013: 8 · 2012: 6
FWCI
7.59
Type
journal article
Language
en
Open access
closed
Locations
  • Annals of Biomedical Engineering (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Center for Research Resources (P41RR001861, RR01861)
Topics
  • Physical Sciences › Engineering › Control and Systems Engineering › Control Systems and Identification
  • Physical Sciences › Computer Science › Artificial Intelligence › Neural Networks and Applications
  • Physical Sciences › Engineering › Computational Mechanics › Advanced Adaptive Filtering Techniques
Keywords
nonlinear system modeling, Volterra systems, filter banks, polynomial nonlinearity, kernel estimation, eigenvalue decomposition, feedforward neural networks, polynomial activation functions, physiological systems, nonlinear system identification
MeSH terms
Algorithms, Computer Simulation, Mathematics, Models, Theoretical, Physiology, Models, Statistical, Neural Networks, Computer, Nonlinear Dynamics

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