Results 81 to 90 of about 19,704 (219)

Denoising for satellite laser altimetry full-waveform data based on EMD-Hurst analysis

International Journal of Digital Earth, 2020
Full-waveform decomposition is crucial for obtaining accurate satellite-ground distance, the accuracy of which is severely affected by noises. However, the traditional filters all depend on filtering parameters.
Zhijie Zhang, Huan Xie, Xiaohua Tong, Hanwei Zhang, Yang Liu, Binbin Li   +5 more
doaj   +1 more source

Endogenous and exogenous dynamics in the fluctuations of capital fluxes: An empirical analysis of the Chinese stock market [PDF]

, 2007
A phenomenological investigation of the endogenous and exogenous dynamics in the fluctuations of capital fluxes is investigated on the Chinese stock market using mean-variance analysis, fluctuation analysis and their generalizations to higher orders. Non-
Albert, Alessio, Alvarez-Ramirez, Barabási, Boccaletti, Carbone, Carbone, Chessa, Deschatres, Duch, Eisler, Eisler, Eisler, Eisler, Eisler, Eisler, Fama, Fama, Gu, Heymann, Holschneider, Hu, Hurst, Johansen, Johansen, Kantelhardt, L. Guo, Lambiotte, Mandelbrot, Mandelbrot, Mandelbrot, Mandelbrot, Mandelbrot, Menezes, Menezes, Mitnitski, Montanari, Muzy, Muzy, Muzy, Muzy, Nacher, Newman, Peng, Peng, Roehner, Sornette, Sornette, Sornette, Sornette, Sornette, Sornette, Sornette, Taqqu, Taylor, W.-X. Zhou, Xu, Z.-Q. Jiang, Zhou, Zhou, Ziemelis, Zumbach, Živković   +62 more
core   +2 more sources

Using National Survey Data to Estimate Healthcare Communication Disparities for Adults With Intellectual and Developmental Disabilities

Journal of Intellectual Disability Research, EarlyView.
ABSTRACT Background Previous studies have identified considerable health outcome disparities for adults with intellectual and developmental disabilities (IDD) as well as poor or ineffective communication between adults with IDD and their medical providers.
Jamie Koenig, Lauren Bishop
wiley   +1 more source

A fast algorithm for robust estimates of the Hurst exponent when analyzing small samples of biometric and market data

Известия высших учебных заведений. Поволжский регион:Технические науки
Background. Currently, the Hurst exponent is quite easily interpreted in relation to biometric, medical and economic data, but it is customary to evaluate it on large samples.
V.I. Volchikhin, A.I. Ivanov, V.A. Tikhomirov, D.V. Tarasov   +3 more
doaj   +1 more source

Deep Neural Network Model for Hurst Exponent: Learning from R/S Analysis

Mathematics
This paper proposes a deep neural network (DNN) model to estimate the Hurst exponent, a crucial parameter in modelling stock market price movements driven by fractional geometric Brownian motion.
Luca Di Persio, Tamirat Temesgen Dufera
doaj   +1 more source

Adaptive Estimation for Weakly Dependent Functional Times Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT We propose adaptive mean and autocovariance function estimators for stationary functional time series under 𝕃p−m‐approximability assumptions. These estimators are designed to adapt to the regularity of the curves and to accommodate both sparse and dense data designs.
Hassan Maissoro, Valentin Patilea, Myriam Vimond   +2 more
wiley   +1 more source

Fractional Black–Scholes option pricing, volatility calibration and implied Hurst exponents in South African context

South African Journal of Economic and Management Sciences, 2017
Background: Contingent claims on underlying assets are typically priced under a framework that assumes, inter alia, that the log returns of the underlying asset are normally distributed.
Emlyn Flint, Eben Maré
doaj   +1 more source

Snow metamorphism: a fractal approach

, 2010
Snow is a porous disordered medium consisting of air and three water phases: ice, vapour and liquid. The ice phase consists of an assemblage of grains, ice matrix, initially arranged over a random load bearing skeleton.
A. D. Frolov, Anna Carbone, Barbara Frigo, Bernardino M. Chiaia, C. W. Emerson, Christian Türk, D. L. Turcotte, V. N. Golubev   +7 more
core   +1 more source

Federalism in Post‐Assad Syria: Toward Durable Peace in a Pluralist Society

Middle East Policy, EarlyView.
Abstract Syria's civil war has left behind a fractured state. While the new president, Ahmed al‐Sharaa, seeks to unify the country and restore centralized governance, this appears unworkable. Instead, this article contends, asymmetrical federalism offers a pathway toward stability.
Dilan Okcuoglu
wiley   +1 more source

Use of EIS and Electrochemical Noise Fractal Analysis to StudySalvia hispanica as Green Corrosion Inhibitor for Carbon Steel

International Journal of Electrochemical Science, 2016
A study on the use of Salvia hispanica (Chia) as green corrosion inhibitor for 1018 carbon steel in 0.5 M H2SO4 has been carried out by using electrochemical impedance (EIS) and electrochemical noise measurements (EN). Parameters such as polarization and
I.A. Hermoso-Diaz, J.G. Gonzalez-Rodriguez, J. Uruchurtu-Chavarin   +2 more
doaj   +1 more source