Results 11 to 20 of about 7,605 (274)

Factor ARMA representation of a Markov process [PDF]

open access: yesEconomics Letters, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Darolles, Serge   +2 more
openaire   +6 more sources

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   +3 more sources

Effect of the COVID-19 pandemic on the number of deaths in Peru: 2017.03-2020.07

open access: yesSemestre Economico, 2021
The objective of the research is to estimate the excess deaths during the COVID-19 epidemic in Peru. The methodology used for the ARMA models with structural with a structural change in mean. In the first place, the results show that the behavior of the
Rene-Paz Paredes
doaj   +1 more source

A Continuous Time GARCH Process of Higher Order [PDF]

open access: yes, 2005
A continuous time GARCH model of order (p,q) is introduced, which is driven by a single Lévy process. It extends many of the features of discrete time GARCH(p,q) processes to a continuous time setting.
Lindner, Alexander M.   +2 more
core   +1 more source

On a Misspecified ARMA Model Fitting to a Data from Gaussian ARMA Process [PDF]

open access: yes, 2014
This paper provides computer simulations concerning a misspecified ARMA(p, q) model fitting to (a data generated from) an ARMA(p, q+1) process, and also a misspecified ARMA(p+h, q) model fitting to an ARMA(p, q+k) process.
Tanaka, Minoru
core   +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

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

A fractionally integrated ECOGARCH process [PDF]

open access: yes, 2006
In this paper we introduce a fractionally integrated exponential continuous time GARCH(p,d,q) process. It is defined in such a way that it is a continuous time extension of the discrete time FIEGARCH(p,d,q) process.
Haug, Stephan   +3 more
core   +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  

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

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