Results 11 to 20 of about 4,545 (215)

Significance and Causality in Continuous Wavelet and Wavelet Coherence Spectra Applied to Hydrological Time Series

open access: yesHydrology, 2020
Wavelet transform, wavelet spectra, and coherence are popular tools for studying fluctuations in time series in the form of a bidimensional time and scale representation.
Juan Carlos Rodríguez-Murillo   +1 more
doaj   +1 more source

Prognosis of Bearing Degradation Using Gradient Variable Forgetting Factor RLS Combined With Time Series Model

open access: yesIEEE Access, 2018
Rolling element bearing is a critical component in many mechanical systems in view of its critical functionality. One of the major issues industries face today is the failure of bearings, which results in catastrophic consequences.
Yanfei Lu   +3 more
doaj   +1 more source

Clinical Characteristics and Outcomes of Incomplete Cardia Reconstruction Cases Following Multiple Anti-reflux Mucosectomy/Anti-reflux Mucosal Ablation Treatments. [PDF]

open access: yesDEN Open
ABSTRACT Introduction Anti‐reflux mucosectomy (ARMS) and anti‐reflux mucosal ablation (ARMA) are novel endoscopic treatments for proton pump inhibitor or potassium‐competitive acid blocker‐refractory gastroesophageal reflux disease. These procedures induce scarring of the artificial ulcer at the gastric cardia, which tightens the enlarged cardiac ...
Tanaka I   +8 more
europepmc   +2 more sources

On model fitting and estimation of strictly stationary processes

open access: yesModern Stochastics: Theory and Applications, 2017
Stationary processes have been extensively studied in the literature. Their applications include modeling and forecasting numerous real life phenomena such as natural disasters, sales and market movements.
Marko Voutilainen   +2 more
doaj   +1 more source

Linear and nonlinear dynamic systems in financial time series prediction [PDF]

open access: yesManagement Science Letters, 2012
Autoregressive moving average (ARMA) process and dynamic neural networks namely the nonlinear autoregressive moving average with exogenous inputs (NARX) are compared by evaluating their ability to predict financial time series; for instance the S&P500 ...
Salim Lahmiri
doaj  

ARMA model for short-term forecasting of solar potential: application to a horizontal surface of Dakar site

open access: yesMaterials and Devices, 2019
This paper presents a model for short-term forecasting of solar potential on a horizontal surface. This study is carried out in to the context of valuing of energy production from photovoltaic solar sources in the Sahelian zone.
A. Mbaye   +8 more
doaj   +1 more source

The Learning Outcomes of Figurenotes Music Activities for Children With Special Needs Based on the ARMA Models

open access: yesSAGE Open, 2023
This study explores Learning Performance Analytics in the context of the Figurenotes Music course for young children aged 2 to 6 with special needs in Taiwan.
Liza Lee, Ying-Sing Liu
doaj   +1 more source

α-spectrum estimation method for ARMA SαS process based on FLOC

open access: yesTongxin xuebao, 2007
The drawback of the parameter estimation method for ARMA SαS process based on fractional lower order moments(FLOM) was analyzed,and based on the conception of fractional lower order covariance(FLOC),a new parameter estimation method of ARMA SαS process ...
WANG Shou-yong1, ZHU Xiao-bo2
doaj   +2 more sources

Prediction and Analysis of Meteorological Drought Based on Time Series(Case Study: SALMAS Watershed) [PDF]

open access: yesمحیط زیست و مهندسی آب, 2016
Time series analyses is a base method for more decisions about hydrological process and water operation. In Iran, drought is a continues and normal condition happening frequently and can be predicted by statistical and mathematical methods and models. In
Motaleb Byzedi   +2 more
doaj  

The distribution of the maximum of an ARMA(1, 1) process

open access: yesComptes Rendus. Mathématique, 2020
We give the cumulative distribution function of $M_n=\max \left(X_1, \ldots , X_n \right)$, the maximum of a sequence of $n$ observations from an ARMA(1, 1) process.
Withers, Christopher S.   +1 more
doaj   +1 more source

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