Results 91 to 100 of about 618 (183)

Multifractal Behavior of Energetic Neutral Atom Time Series from IBEX

The Astrophysical Journal
Energetic neutral atom (ENA) flux time series measured by the Interstellar Boundary Explorer (IBEX) from the north and south polar regions have recently revealed persistence, which is in accord with the persistence in the solar wind (SW) flow pressure at
N. V. Sarlis, G. Livadiotis, D. J. McComas, J. S. Rankin, B. L. Shrestha, N. A. Schwadron   +5 more
doaj   +1 more source

Effects of maximal fluctuation moment $q$ and detrending polynomial orders on the observed multifractal features within MFDFA

, 2013
We focus on the importance of $q$ moments range used within multifractal detrended fluctuation analysis (MFDFA) to calculate the generalized Hurst exponent spread and multifractal properties of signals. Different orders of detrending polynomials are also discussed.
Pamuła, Grzegorz, Grech, Dariusz
openaire   +2 more sources

Multifractal long-range dependence pattern of functional magnetic resonance imaging in the human brain at rest. [PDF]

Cereb Cortex, 2023
Guan S, Jiang R, Chen DY, Michael A, Meng C, Biswal B.   +5 more
europepmc   +1 more source

Long‐Range Dependence, Multifractality, and Trends of Drought Across Multiple Accumulation Periods in Türkiye Derived From SPEI

Atmospheric Science Letters
Drought is a scale‐dependent, memory‐driven process, yet its temporal persistence and complexity remain poorly understood relative to its intensity and frequency.
Mehmet Ali Çelik
doaj   +1 more source

Are clean energy markets efficient? A multifractal scaling and herding behavior analysis of clean and renewable energy markets before and during the COVID19 pandemic. [PDF]

Heliyon, 2023
Memon BA, Aslam F, Asadova S, Ferreira P.   +3 more
europepmc   +1 more source

Multifractal Complexity of the Chandler Wobble and Its Anomalous Disappearance (2015--2020): A MFDFA Study

The Chandler wobble (CW) --- the ≈ 433-day free nutation of Earth's rotation pole --- experienced an anomalous near-disappearance between 2015 and 2020, followed by a re-excitation with an approximately 180° phase reversal. Using Multifractal Detrended Fluctuation Analysis (MFDFA) applied to more than six decades (1962--2024) of daily IERS EOP
Sebastian Jaroszewicz, Nahuel Daniel Mendez, Maria Beccar-Varela, Maria Mariani   +3 more
openaire   +2 more sources

Research on Efficiency and Multifractality of Gold Market under Major Events

Fractal and Fractional
(1) Background: As a safe-haven asset, gold attracts a large number of investors during major events. Uncertainties caused by global economic and market conditions lead to increased purchases of gold by investors, which in turn affects the efficiency of ...
Feifei Wang, Jiaxin Chang, Weizhen Zuo, Weijie Zhou   +3 more
doaj   +1 more source

Are rare earth stocks efficient? Novel insights using asymmetric MF-DFA

Financial Innovation
This study investigates the weak-form efficiency and asymmetric multifractal scaling behavior of rare earth stock indices in the global, U.S. and Chinese markets during the trade war and the COVID-19 period. We examine the scaling behavior across overall,
Pengbo Wan, Ghulam Mujtaba, Saira Ashfaq, Song Liangrong, Rana Muhammad Nasir   +4 more
doaj   +1 more source

Directional Reorganization in Multifractal Parameter Space of Precipitation Under Climate Change: The Catalan Internal Basins

Fractal and Fractional
Precipitation in Mediterranean regions is characterized by strong intermittency and complex organization across multiple temporal scales, posing challenges for understanding its future evolution under climate change. This study examines projected changes
María del Carmen Casas-Castillo, Raül Rodríguez-Solà, Ricard Kirchner, Carina Serra   +3 more
doaj   +1 more source

Multifractal detrended fluctuation analysis of insole pressure sensor data to diagnose vestibular system disorders. [PDF]

Biomed Eng Lett, 2023
Günaydın B, İkizoğlu S.
europepmc   +1 more source