вейвлет-анализ.

Wavelet transform is described as a new tool for investigation of data generated by the chaotic dynamic systems. Its usage is illustrated by the analysis of the temporal oscillation of the atmosphere zonal circulation index.

Based on the wavelet­analysis of experimental data, we study in this paper the phenomenon of synchronization of oscillations in the dynamics of small groups of structural units of the kidney (paired nephrons and triplets). Distinctions between synchronous dynamics of interacting nephrons in normal and hypertensive rats are discussed. We show that mean duration of synchronous oscillations is about 3 times less in hypertensive rats. We state that in­phase synchronization is the most typical case in the dynamics of interacting nephrons (more than 90% of experimental data).

Renal blood flow autoregulation at the level of individual nephrons includes two interacting mechanisms that produce oscillations with different time scales: the tubolo­glomerular feedback (TGF) and the myogenic response. Based on the wavelet­analysis of experimental data, we study in this work phenomena of amplitude and frequency modulation of myogenic oscillations by the TGF­rhythm. Features of nonlinear depen­dencies of amplitude and frequency deviation of modulated process versus the amplitude of modulating oscillations are revealed.