Results 21 to 30 of about 13,873,042 (261)

Survey of Temporal and Special Changes of Nisan Rainfalls and Prediction of Them in East Azarbayjan Province [PDF]

open access: yesنشریه جغرافیا و برنامه‌ریزی, 2015
In this paper, Nisan rainfalls of East Azerbaijan Province in the period of 1980 to 2009 were investigated. Initially changes of Nisan rainfalls trend were analyzed using the non-parametric Mann-Kendall test and Sen's estimator slope that are the most ...
Tahere Jalali Ansaroodi   +3 more
doaj  

GA-ARMA Model for Predicting IGS RTS Corrections

open access: yesInternational Journal of Aerospace Engineering, 2017
The global navigation satellite system (GNSS) is widely used to estimate user positions. For precise positioning, users should correct for GNSS error components such as satellite orbit and clock errors as well as ionospheric delay. The international GNSS
Mingyu Kim, Jeongrae Kim
doaj   +1 more source

Auto Regressive Moving Average (ARMA) Modeling Method for Gyro Random Noise Using a Robust Kalman Filter

open access: yesSensors, 2015
To solve the problem in which the conventional ARMA modeling methods for gyro random noise require a large number of samples and converge slowly, an ARMA modeling method using a robust Kalman filtering is developed.
Lei Huang
doaj   +1 more source

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

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

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   +4 more sources

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  

A methodology for stochastic inventory modelling with ARMA triangular distribution for new products

open access: yesCogent Business & Management, 2017
This paper proposes a stochastic inventory policy of continuous review with random demand described with temporal dependence through an autoregressive moving average (ARMA) model with explicative variables, of usefulness in new products without a history
Fernando Rojas
doaj   +1 more source

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

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

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