Results 51 to 60 of about 18,134 (280)

Fractal Analysis of River Flow Fluctuations (with Erratum) [PDF]

, 2006
We use some fractal analysis methods to study river flow fluctuations. The result of the Multifractal Detrended Fluctuation Analysis (MF-DFA) shows that there are two crossover timescales at $s_{1\times}\sim12$ and $s_{2\times}\sim130$ months in the ...
Alados, Ashkenazy, Ashkenazy, Ashkenazy, Ashkenazy, Bacry, Bahar, Barabási, Barbosa, Barmes, Blesic, Buldyrev, Buldyrev, Buldyrev, Bunde, Bunde, Burlando, Burlando, Chen, Chen, Chianca, Eke, Evalds Hermanis, Fano, Feder, Feder, Fraedrich, Hausdorff, Hu, Hurst, Hurst, Ivanov, Ivanov, Ivanova, Ivanova, Kantelhardt, Kantelhardt, Kantelhardt, Kantelhardt, Koscielny-Bunde, Koscielny-Bunde, Koscielny-Bunde, Koscielny-Bunde, Koscielny-Bunde, Kroll, Liu, Livina, Livina, Loboda, M. Sadegh Movahed, Malamud, Mandelbrot, Mantegna, Matsoukas, Murdock, Muzy, Nagarajan, Ossadnik, Oświȩcimka, Pandey, Peitgen, Pelletier, Peng, Peng, Sadegh Movahed, Sadegh Movahed, Schmitt, Talkner, Taqqu, Tessier, Vandewalle, Vandewalle, Xu   +72 more
core   +2 more sources

A new method for abrupt change detection in dynamic structures [PDF]

Nonlinear Processes in Geophysics, 2008
Based on Detrended Fluctuation Analysis (DFA), we propose a new method – Moving Detrended Fluctuation Analysis (MDFA) – to detect abrupt change in dynamic structures.
W. P. He, G. L. Feng, Q. Wu, S. Q. Wan, J. F. Chou   +4 more
doaj  

Long range correlation in cosmic microwave background radiation

, 2011
We investigate the statistical anisotropy and Gaussianity of temperature fluctuations of Cosmic Microwave Background radiation (CMB) data from {\it Wilkinson Microwave Anisotropy Probe} survey, using the multifractal detrended fluctuation analysis ...
C. L. Alados, D. Novikov, F. Bernardeau, F. Ghasemi, H. E. Hurst, H. O. Peitgen, J. A. Peacock, J. Feder, J. M. Hausdorff, J. R. Bond, K. Schwarzschild, M. Reza Rahimi Tabar, M. Sadegh Movahed, P. Coles, R. N. Mantegna, Sohrab Rahvar, T. Fukushige, V. F. Mukhanov   +17 more
core   +1 more source

On the Accuracy of Fault Diagnosis for Rolling Element Bearings Using Improved DFA and Multi-Sensor Data Fusion Method

Sensors, 2020
Rolling element bearings are widely employed in almost every rotating machine. The health status of bearings plays an important role in the reliability of rotating machines. This paper deals with the principle and application of an effective multi-sensor
Qiang Song, Sifang Zhao, Mingsheng Wang
doaj   +1 more source

Long-term power-law fluctuation in Internet traffic [PDF]

, 2006
Power-law fluctuation in observed Internet packet flow are discussed. The data is obtained by a multi router traffic grapher (MRTG) system for 9 months. The internet packet flow is analyzed using the detrended fluctuation analysis.
Csabai I., Fukuda K., Fukuda K., Hu K., Kantelhardt J. W., Kocarev L., Musha T., Pastor-Satorras R., Paxson V., Peng C.-K., Peng C.-K., Ribeiro V. J., Tadaki S., Tadaki S., Takayasu M., Takayasu M., Vjushin D., Wolfram S., Yukawa S.   +18 more
core   +4 more sources

Multifractal Detrended Fluctuation Analysis of Temperature Reanalysis Data over Greece

Atmosphere, 2019
The Multifractal Detrended Fluctuation Analysis (MF-DFA) is used to examine the scaling behavior and the multifractal characteristics of the mean daily temperature time series of the ERA-Interim reanalysis data for a domain centered over Greece.
Kostas Philippopoulos, Nikolaos Kalamaras, Chris G. Tzanis, Despina Deligiorgi, Ioannis Koutsogiannis   +4 more
doaj   +1 more source

Detrended Fluctuation Analysis of EEG Signals

Procedia Technology, 2014
AbstractScaling properties are one of the most important quantifiers of complexity in many events, as time series (TS). To try to have a glimpse how brain is working, we need new methods of analysis. The structural characteristics of biomedical signals are often visually apparent, but not captured by conventional measures (average amplitude, Fourier ...
Márton, L.F., Brassai, S.T., Bakó, L., Losonczi, L.   +3 more
openaire   +1 more source

Multifractal detrended fluctuation analysis of sunspot time series [PDF]

Journal of Statistical Mechanics: Theory and Experiment, 2006
9 pages, 6 ...
Movahed, M. Sadegh, Jafari, G. R., Ghasemi, F., Rahvar, Sohrab, Tabar, M. Reza Rahimi   +4 more
openaire   +2 more sources

Direct Gravity‐Induced Modulation of Cardiac Conduction Pathways Evidenced Through Propagation Features in Electrophysiological Mapping

Advanced Materials Technologies, EarlyView.
A high‐density wearable body‐surface potential mapping array reveals how gravity reshapes cardiac conduction in real time. By resolving spatiotemporal delay patterns invisible to conventional ECG, the platform uncovers posture‐dependent electrophysiological adaptations across the thorax.
Ruben Ruiz‐Mateos Serrano, Matias L. Picchio, Daniele Mantione, David Mecerreyes, George G. Malliaras   +4 more
wiley   +1 more source

Midbrain PAG Astrocytes Modulate Mouse Defensive and Panic‐Like Behaviors

Advanced Science, EarlyView.
Astrocytes in the midbrain periaqueductal gray (PAG) dynamically encode threat intensity and shape defensive action selection in mice. Real‐time Ca2+ imaging reveals robust astrocytic activation during predator odor and CO2 exposure. Aberrant astrocytic Ca2+ overactivation disrupts goal‐directed escape, biases behavior toward freezing, and induces ...
Ellane Barcelon, Kyungchul Noh, Minkyu Hwang, Yoon‐Jung Kim, Unjin Lee, Yeon Joo Ryu, Je‐Kyung Ryu, Sang Beom Jun, Se‐Young Choi, Woo‐Hyun Cho, Sung Joong Lee   +10 more
wiley   +1 more source