Multifractal analysis of laser Doppler flowmetry signals: partition function and generalized dimensions of data recorded before and after local heating

• Autorzy: Humeau A. , Buard B. , Rousseau D. , Chapeau-Blondeau F. , Abraham P.
• Języki publikacji: EN

Abstrakty

EN

Laser Doppler flowmetry (LDF) signals - that reflect the peripheral cardiovascular system - are now widespread in blood microcirculation research. Over the last few years, the central cardiovascular system has been the subject of many fractal and multifractal works. However, only very few multifractal studies of LDF signals have been published. Such multifractal analyses have shown that LDF data can be weakly multifractal but the origin of such characteristics are still unknown. We therefore herein propose a multifractal analysis of LDF signals recorded on the forearm of twelve healthy subjects, before and after skin local heating. The results show that the partition functions for all the signals have power-law characteristics. Moreover, generalized dimensions present very few variations with q for the signals recorded before heating; these variations are larger 20 minutes after local heating. Physiological activities may therefore play a role in the weak multifractal properties of LDF data.

Słowa kluczowe

EN

generalized dimensions; laser Doppler flowmetry; local heating; microcirculation; multifractal analysis; partition function

PL

metoda laserowo-dopplerowska; mikrokrążenie; analiza multifraktalna; funkcja rozdziału

• Wydawca: Nałęcz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences ; Elsevier
• Czasopismo: Biocybernetics and Biomedical Engineering
• Rocznik: 2012
• Tom: Vol. 32, no. 1
• Strony: 17--26
• Opis fizyczny: Bibliogr. 29 poz., wykr.

Twórcy

autor

Humeau A.

autor

Buard B.

autor

Rousseau D.

autor

Chapeau-Blondeau F.

autor

Abraham P.

• Laboratoire d'Ingénierie des Systémes Automatisés (LISA), Université d'Angers, 62 avenue Notre Dame du Lac, 49000 Angers, France,

Bibliografia

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