Results 51 to 60 of about 222,813 (203)

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

A Novel Fault Diagnosis Approach for Rolling Bearing Based on High-Order Synchrosqueezing Transform and Detrended Fluctuation Analysis

IEEE Access, 2020
Time-frequency analysis always plays an important role in machine health monitoring owing to its advantage in extracting the fault information contained in non-stationary signal.
Wei Liu, Wei Chen, Zhihua Zhang
semanticscholar   +1 more source

Dynamics of Bid-ask Spread Return and Volatility of the Chinese Stock Market

, 2011
Bid-ask spread is taken as an important measure of the financial market liquidity. In this article, we study the dynamics of the spread return and the spread volatility of four liquid stocks in the Chinese stock market, including the memory effect and ...
Admati, Bouchaud, Bouchaud, Cajueiro, Challet, Chan, Cont, Dacorogna, Daniels, Eguiluz, Farmer, Farmer, Giardina, Gopikrishnan, Gu, Gu, Guang Chen, Halsey, Harris, Horvatic, Huang, Jiang, Laloux, Li-Xin Zhong, Lillo, Lillo, Liu, Lux, Mantegna, Mcinish, Mike, Miskiewicz, Moyano, Ni, Peng, Peng, Plerou, Podobnik, Podobnik, Podobnik, Potters, Qiu, Qiu, Qiu, Ren, Roll, Stauffer, Stoll, Tenenbaum, Tian Qiu, Tóth, Tóth, Wang, Wei, Wood, Xiao-Run Wu, Zhao, Zhou, Zhou, Zhou, Zunino   +60 more
core   +1 more source

Fluctuation Analysis of Human Electroencephalogram [PDF]

, 2001
The scaling behaviors of the human electroencephalogram (EEG) time series are studied using detrended fluctuation analysis. Two scaling regions are found in nearly every channel for all subjects examined. The scatter plot of the scaling exponents for all
C.-K. Peng, C.-K. Peng, K. Lehnertz, K. Nagata, P. A. Watters, P. Luu, R. C. Hwa, Rudolph C. Hwa, S. Blanco, S. Blanco, Thomas C. Ferree   +10 more
core   +3 more sources

Multifractal Detrended Cross-Correlation Analysis of Global Methane and Temperature

Remote Sensing, 2020
Multifractal Detrended Cross-Correlation Analysis (MF-DCCA) was applied to time series of global methane concentrations and remotely-sensed temperature anomalies of the global lower and mid-troposphere, with the purpose of investigating the multifractal ...
Chris G. Tzanis, Ioannis Koutsogiannis, Kostas Philippopoulos, Nikolaos Kalamaras   +3 more
doaj   +1 more source

Detrended Fluctuation analysis of Bach's Inventions and Sinfonias pitches

, 2007
Detrended Fluctuation Analysis (DFA), suitable for the analysis of nonstationary time series, is used to investigate power law in some of the Bach's pitches series. Using DFA method, which also is a well-established method for the detection of long-range
Jafari, G. R., Pedram, P., Tabrizi, K. Ghafoori   +2 more
core   +2 more sources

Detrended fluctuation analysis for fractals and multifractals in higher dimensions

, 2006
One-dimensional detrended fluctuation analysis (1D DFA) and multifractal detrended fluctuation analysis (1D MF-DFA) are widely used in the scaling analysis of fractal and multifractal time series because of being accurate and easy to implement.
B. B. Mandelbrot, D. Maraun, E. Alessio, Gao-Feng Gu, H. E. Hurst, J. W. Kantelhardt, M. Holschneider, P. Grassberger, Wei-Xing Zhou   +8 more
core   +1 more source

Investigating Long-Range Dependence of Emerging Asian Stock Markets Using Multifractal Detrended Fluctuation Analysis

Symmetry, 2020
The use of multifractal approaches has been growing because of the capacity of these tools to analyze complex properties and possible nonlinear structures such as those in financial time series.
Faheem Aslam, Saima Latif, P. Ferreira
semanticscholar   +1 more source

Task-dependent fractal patterns of information processing in working memory

Scientific Reports, 2022
We applied detrended fluctuation analysis, power spectral density, and eigenanalysis of detrended cross-correlations to investigate fMRI data representing a diurnal variation of working memory in four visual tasks: two verbal and two nonverbal.
Jeremi K. Ochab, Marcin Wątorek, Anna Ceglarek, Magdalena Fafrowicz, Koryna Lewandowska, Tadeusz Marek, Barbara Sikora-Wachowicz, Paweł Oświęcimka   +7 more
doaj   +1 more source