Schreiber, Korbinian und Modest, Heike I. und Räth, Christoph (2018) Phase walk analysis of leptokurtic time series. Chaos, 28 (6), 063120. American Institute of Physics (AIP). doi: 10.1063/1.5018301. ISSN 1054-1500.
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Offizielle URL: https://doi.org/10.1063/1.5018301
Kurzfassung
The Fourier phase information play a key role for the quantified description of nonlinear data. We present a novel tool for time series analysis that identifies nonlinearities by sensitively detecting correlations among the Fourier phases. The method, being called phase walk analysis, is based on well established measures from random walk analysis, which are now applied to the unwrapped Fourier phases of time series. We provide an analytical description of its functionality and demonstrate its capabilities on systematically controlled leptokurtic noise. Hereby, we investigate the properties of leptokurtic time series and their influence on the Fourier phases of time series. The phase walk analysis is applied to measured and simulated intermittent time series, whose probability density distribution is approximated by power laws. We use the day-to-day returns of the Dow-Jones industrial average, a synthetic time series with tailored nonlinearities mimicing the power law behavior of the Dow-Jones and the acceleration of the wind at an Atlantic offshore site. Testing for nonlinearities by means of surrogates shows that the new method yields strong significances for nonlinear behavior. Due to the drastically decreased computing time as compared to embedding space methods, the number of surrogate realizations can be increased by orders of magnitude. Thereby, the probability distribution of the test statistics can very accurately be derived and parameterized, which allows for much more precise tests on nonlinearities.
elib-URL des Eintrags: | https://elib.dlr.de/120693/ | ||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||
Titel: | Phase walk analysis of leptokurtic time series | ||||||||||||||||
Autoren: |
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Datum: | Juni 2018 | ||||||||||||||||
Erschienen in: | Chaos | ||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||
Open Access: | Ja | ||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||
Band: | 28 | ||||||||||||||||
DOI: | 10.1063/1.5018301 | ||||||||||||||||
Seitenbereich: | 063120 | ||||||||||||||||
Verlag: | American Institute of Physics (AIP) | ||||||||||||||||
ISSN: | 1054-1500 | ||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||
Stichwörter: | time series analysis, Fourier transformation, turbulence, econophysics | ||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||
HGF - Programmthema: | Forschung unter Weltraumbedingungen | ||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||
DLR - Forschungsgebiet: | R FR - Forschung unter Weltraumbedingungen | ||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Komplexe Plasmen / Datenanalyse (alt) | ||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||
Institute & Einrichtungen: | Institut für Materialphysik im Weltraum > Gruppe Komplexe Plasmen | ||||||||||||||||
Hinterlegt von: | Räth, Christoph | ||||||||||||||||
Hinterlegt am: | 02 Jul 2018 07:05 | ||||||||||||||||
Letzte Änderung: | 13 Jun 2023 14:36 |
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