Results 21 to 30 of about 31,033 (265)
Slow and fast dynamics in coupled systems: A time series analysis view [PDF]
Physica D: Nonlinear Phenomena, 1998 We study the dynamics of systems with different time scales, when access only to the slow variables is allowed. We use the concept of Finite Size Lyapunov Exponent (FSLE) and consider both the case when the equations of motion for the slow components are known, and the situation when a scalar time series of one of the slow variables has been measured ...
G. BOFFETTA +4 more
openaire +5 more sources
Frontiers in Physiology, 2020 Interacting dynamical systems abound in nature, with examples ranging from biology and population dynamics, through physics and chemistry, to communications and climate.
Dushko Lukarski +5 more
doaj +1 more source
Journal of Function Spaces, 2022 The Lorenz-Stenflo mathematical model describes a complex dynamical behavior related to atmospheric acoustic-gravity waves. In this study, qualitative analysis of the four-dimensional hyperchaotic Lorenz-Stenflo system via the Caputo fractional ...
Chernet Tuge Deressa +3 more
doaj +1 more source
Nonlinear Analysis of Return Time Series Model by Oriented Percolation Dynamic System [PDF]
Abstract and Applied Analysis, 2013 Fluctuation dynamics of financial price changes is developed and investigated by oriented percolation system; oriented percolation is percolation with a special direction along which the activity can only propagate one way but not the other. Then, nonlinear behaviors of distribution and leverage effect of return time series are studied for the proposed
Pei, Anqi, Wang, Jun
openaire +4 more sources
ANALYSIS OF TIME SERIES RECONSTRUCTION FOR DYNAMIC SYSTEM
Acta Physica Sinica, 1996 The topological properties of the delay-time reconstruction transformation of dynamic system are analysed by means of the Jacobian of the transformation. Results show that the topological properties depend not only on the reconstructing dimension, but also on the delay time, and on the conditional stability of a time series itself.
null YANG ZHI-AN +2 more
openaire +1 more source
Metapopulation dynamics of a persisting predator–prey system in the laboratory: time series analysis [PDF]
Experimental & Applied Acarology, 1997 The scarcity of experimental evidence for the persistence of predator–prey systems at the metapopulation level inspired us to develop a simple predator–prey experiment that could be used for testing several theoretical predictions concerning persistence and its causes.
Janssen, A. +4 more
openaire +3 more sources
PLoS ONE, 2023 This study investigated temporal variations of the COVID-19 pandemic in Japan using a time series analysis incorporating maximum entropy method (MEM) spectral analysis, which produces power spectral densities (PSDs). This method was applied to daily data
Ayako Sumi
doaj +1 more source
Land, 2021 Dynamics of arable and pastoral farming systems in Scotland over the period 1867–2020 are documented using time series analysis methods, including for nonlinear dynamical systems. Results show arable and pastoral farming, at a national scale, are dynamic
Richard Aspinall +2 more
doaj +1 more source
Spurious Results of Fluctuation Analysis Techniques in Magnitude and Sign Correlations
Entropy, 2017 Fluctuation Analysis (FA) and specially Detrended Fluctuation Analysis (DFA) are techniques commonly used to quantify correlations and scaling properties of complex time series such as the observable outputs of great variety of dynamical systems, from ...
Pedro Carpena +4 more
doaj +1 more source
A Novel Method for Detection of Epilepsy in Short and Noisy EEG Signals Using Ordinal Pattern Analysis [PDF]
Iranian Journal of Medical Physics, 2010 Introduction: In this paper, a novel complexity measure is proposed to detect dynamical changes in nonlinear systems using ordinal pattern analysis of time series data taken from the system.
Iman Veisi +3 more
doaj +1 more source