Results 21 to 30 of about 12,105 (264)

The Estimation of Arma Models

open access: yesThe Annals of Statistics, 1975
In estimating a vector model, $\Sigma B(j)x(n-j)=\Sigma A(j)\epsilon(n-j), A(0)=I_r, E(\epsilon(m)\epsilon(n)')=\delta_{mn}K$ it is suggested that attention be confined to cases where $g(z) =\Sigma A(j)z^j, h(z)=\Sigma B(j)z^j$ have determinants with no zeroes inside the unit circle and have $I_r$ as greatest common left divisor and where $\1brack A(p)\
openaire   +2 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

Comparative Study Among Different Time Series Models for Monthly Rainfall Forecasting in Shiraz Synoptic Station, Iran [PDF]

open access: yesWater Harvesting Research, 2018
In this research, monthly rainfall of Shiraz synoptic station from March 1971 to February 2016 was studied using different time series models by ITSM Software.
Mehdi Bahrami   +4 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  

Forecasting of currency exchange rates using an adaptive ARMA model with differential evolution based training

open access: yesJournal of King Saud University: Computer and Information Sciences, 2014
To alleviate the limitations of statistical based methods of forecasting of exchange rates, soft and evolutionary computing based techniques have been introduced in the literature.
Minakhi Rout   +3 more
doaj   +1 more source

System identification using neuro fuzzy approach for IoT application

open access: yesMeasurement: Sensors, 2022
The Internet of Things (IoT) has become a popular application in recent years. However, it is the wireless communication mode. In such a scenario, the user would have to send information either nonlinear or dynamic data type in the form of a signal or an
Rakesh Kumar Pattanaik   +3 more
doaj   +1 more source

Testing a linear ARMA model against threshold-ARMA models: A Bayesian approach [PDF]

open access: yesCommunications in Statistics - Simulation and Computation, 2016
We introduce a Bayesian approach to test linear autoregressive moving-average (ARMA) models against threshold autoregressive moving-average (TARMA) models. Firstly, the marginal posterior densities of all parameters, including the threshold and delay, of a TARMA model are obtained by using Gibbs sampler with Metropolis-Hastings algorithm.
Liang, Rubing   +3 more
openaire   +3 more sources

Two level Differential Evolution algorithms for ARMA parameters estimatio [PDF]

open access: yes, 2013
The problem of determining simultaneously the model order and coefficient of an Autoregressive Moving Average (ARMA) model is examined in this paper. An Evolutionary Algorithm (EA) comprising two-level Differential Evolution (DE) optimization scheme ...
Tijani, Ismaila   +2 more
core   +1 more source

Estimation of the unemployment rate in Turkey: A comparison of the ARIMA and machine learning models including Covid-19 pandemic periods

open access: yesHeliyon, 2023
The article focuses on analyzing the robustness of Auto Regressive Integrated Moving Average (ARIMA) and Artificial Neural Networks (ANN) methods in unemployment rate estimation. In this context, a stochastic trend in the unemployment rate was determined
Dilek Surekci Yamacli, Serhan Yamacli
doaj   +1 more source

ARMA model for random periodic processes [PDF]

open access: yes, 2018
In this thesis, we construct ARMA model for random periodic processes. We stress on the mixed periodicity and randomness of the model and redefined the definition of sample autocovariance function.
Yujia Liu (1250571)
core   +1 more source

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