Results 11 to 20 of about 10,065 (268)

Regime-Switching Discrete ARMA Models for Categorical Time Series [PDF]

open access: yesEntropy, 2020
For the modeling of categorical time series, both nominal or ordinal time series, an extension of the basic discrete autoregressive moving-average (ARMA) models is proposed.
Christian H. Weiß
doaj   +2 more sources

Revisiting inference for ARMA models: Improved fits and superior confidence intervals. [PDF]

open access: yesPLoS ONE
Autoregressive moving average (ARMA) models are widely used for analyzing time series data. However, standard likelihood-based inference methodology for ARMA models has avoidable limitations.
Jesse Wheeler, Edward L Ionides
doaj   +2 more sources

Hybrid models combining trend and seasonality components with machine learning algorithms provide accurate forecasting of malaria incidence. [PDF]

open access: yesPLOS Global Public Health
Forecasting malaria incidence is vital for effective resource allocation during malaria elimination. In this study, we highlight robust models for forecasting incidence using climatic and malaria data from Goa, India.
Syed Shah Areeb Hussain   +8 more
doaj   +2 more sources

Are We in Control? How Best to Include a Control Group in Interrupted Time Series Designs: A Simulation Study [PDF]

open access: yesJournal of Evaluation in Clinical Practice, Volume 32, Issue 4, June 2026.
ABSTRACT Background While controlled interrupted time series (CITS) are commonly used to evaluate public health policies, how to incorporate control(s) into their statistical modelling has received limited attention. We aimed to compare the statistical performance of different model formulations for including control groups in various segmented ...
Francesco Manca   +2 more
wiley   +2 more sources

Bayesian analysis of ARMA models [PDF]

open access: yes, 2000
Root cancellation in Auto Regressive Moving Average (ARMA) models leads tolocal non-identification of parameters. When we use diffuse or normal priorson the parameters of the ARMA model, posteriors in Bayesian analyzes show ana posteriori favor for this local non-identification. We show that the priorand posterior of the parameters of an ARMA model are
Kleibergen, F.R., Hoek, H.-
openaire   +5 more sources

SchWARMA: A model-based approach for time-correlated noise in quantum circuits

open access: yesPhysical Review Research, 2021
Temporal noise correlations are ubiquitous in quantum systems, yet often neglected in the analysis of quantum circuits due to the complexity required to accurately characterize and model them.
Kevin Schultz   +3 more
doaj   +1 more source

Bayesian Inference for Seasonal ARMA Models [PDF]

open access: yesThe Egyptian Statistical Journal, 1987
An essential ingredient of any time series anatysis is the estimation of the modcl parameters. The main objective of this paper is to develop a convenient Rayesian technique for estimation which can be used to analyze ‘seasonal autoregressive moving ...
Samir Shaarawy, Mohamed Ismail
doaj   +1 more source

Groundwater Depth Forecasting Using a Coupled Model

open access: yesDiscrete Dynamics in Nature and Society, 2021
Accurate and reliable prediction of groundwater depth is a critical component in water resources management. In this paper, a new method based on coupling wavelet decomposition method (WA), autoregressive moving average (ARMA) model, and BP neural ...
Manfei Zhang   +3 more
doaj   +1 more source

Exchange Market Liquidity Prediction with the K-Nearest Neighbor Approach: Crypto vs. Fiat Currencies

open access: yesMathematics, 2020
In this paper, we compare the predictions on the market liquidity in crypto and fiat currencies between two traditional time series methods, the autoregressive moving average (ARMA) and the generalized autoregressive conditional heteroskedasticity (GARCH)
Klender Cortez   +2 more
doaj   +1 more source

Modelling The Volatility of Frankfurt Stock Exchange (DAX) Returns Using hybrid Models [PDF]

open access: yesFinancial Markets, Institutions and Risks
Recently, the interest of researchers in the use of hybrid models in the process of analyzing model time series with fluctuations and forecasting fluctuations in financial time series has increased significantly. Hybrid ARMA-GARCH models were created for
Hadj Khelifa   +2 more
doaj   +1 more source

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