Results 91 to 100 of about 14,770 (221)

Random fields of variable order on multifractal domains [PDF]

, 2004
We introduce a class of random …eld models with variable regularity/singularity order on multifractal\ud domains. The derivation of results on atomic decomposition of functions in fractional\ud Sobolev spaces of variable order, and traces of these spaces
Anh, Vo V., Angulo, Jose M., Ruiz-Medina, Maria D.   +2 more
core  

Multifractal Spectrum Curvature of RR Tachograms of Healthy People and Patients with Congestive Heart Failure, a New Tool to Assess Health Conditions

Entropy, 2019
We calculate the multifractal spectra of heartbeat RR-interval time series (tachograms) of healthy subjects and patients with congestive heart failure (CHF).
Ana María Aguilar-Molina, Fernando Angulo-Brown, Alejandro Muñoz-Diosdado   +2 more
doaj   +1 more source

A Comparison of Realized Measures of Integrated Volatility: Price Duration‐ vs. Return‐Based Approaches

Journal of Forecasting, Volume 45, Issue 4, Page 1579-1600, July 2026.
ABSTRACT We study the accuracy of a variety of parametric price duration‐based realized variance estimators constructed via various financial duration models and compare their forecasting performance with the performance of various nonparametric return‐based realized variance estimators.
Björn Schulte‐Tillmann, Mawuli Segnon, Timo Wiedemann   +2 more
wiley   +1 more source

Interplay Between Green Investment and Market Price Premia in Global Shipping

International Journal of Finance &Economics, Volume 31, Issue 3, Page 3849-3868, July 2026.
ABSTRACT Existing research emphasises that the driver of green investment is its future profitability. This paper shows that other investors' decisions also influence green investment. We take the example of scrubber installation in shipping, which is optional by regulation but has an established market for trading its underlying asset.
Yao Shi, Nikos C. Papapostolou, Malvina Marchese, Ioannis C. Moutzouris, Angelos Efstathiou   +4 more
wiley   +1 more source

Multifractal characteristics of combustor dynamics close to lean blowout

, 2015
In classical literature, blowout is described as loss of static stability of the combustion system whereas thermoacoustic instability is seen as loss of dynamic stability of the system. At blowout, the system transitions from a stable reacting state to a
Unni, Vishnu R., Sujith, R. I.
core   +1 more source

Distribution of Air Temperature Multifractal Characteristics Over Greece

Atmosphere, 2019
In this study, Multifractal Detrended Fluctuation Analysis (MF-DFA) is applied to daily temperature time series (mean, maximum and minimum values) from 22 Greek meteorological stations with the purpose of examining firstly their scaling behavior and then
Nikolaos Kalamaras, Chris G. Tzanis, Despina Deligiorgi, Kostas Philippopoulos, Ioannis Koutsogiannis   +4 more
doaj   +1 more source

Decoding Compound Flood Risk Under Nonstationary Conditions: A Separable Parametric Framework Revealing the Heterogeneous Effects of Driving Mechanisms

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract Compound flooding in coastal environments arises from the interaction of extreme precipitation and elevated coastal water levels. Existing approaches typically rely either on process‐based hydrodynamic simulations or statistical characterizations of hazard drivers, constraining the capacity to quantify the contribution of individual mechanisms
Stergios Emmanouil, Andreas Langousis, Elizabeth Perry, Joshua P. Hacker, Emmanouil N. Anagnostou   +4 more
wiley   +1 more source

A Multivariate Method for Dynamic System Analysis: Multivariate Detrended Fluctuation Analysis Using Generalized Variance

Topics in Cognitive Science, Volume 18, Issue 3, July 2026.
Abstract Fractal fluctuations are a core concept for inquiries into human behavior and cognition from a dynamic systems perspective. Here, we present a generalized variance method for multivariate detrended fluctuation analysis (mvDFA). The advantage of this extension is that it can be applied to multivariate time series and considers intercorrelation ...
Sebastian Wallot, Julien Patrick Irmer, Monika Tschense, Nikita Kuznetsov, Andreas Højlund, Martin Dietz   +5 more
wiley   +1 more source

A bivariate multifractal analysis approach to understanding socio-spatial segregation dynamics

Scientific Reports
Although the study of multifractal properties is now an established approach for the statistical analysis of urban data, the joint multifractal analysis of several spatial signals remains largely unexplored.
Janka Lengyel, Stéphane G. Roux, Olivier Bonin, Stéphane Jaffard, Patrice Abry   +4 more
doaj   +1 more source

A Mathematical Review and Improvement of the Multifractal Analysis

IEEE Access
This article presents a focused mathematical study of multifractal analysis, building on previous applications to reservoir rock characterization. Here, we revisit the theoretical foundations by summarizing key multifractal measures and classification ...
Fawaz Hjouj, Mohamed Soufiane Jouini
doaj   +1 more source