نتایج جستجو برای: روش arima

تعداد نتایج: 372572  

ژورنال: :فصلنامه مطالعات اقتصادی کاربردی ایران (علمی - پژوهشی) 2015
حمید ابریشمی فرخنده جبل عاملی معصومه ابوالحسنی افشین جوان

باتوجه به افزایش روزافزون مصرف گاز طبیعی، برنامه ریزی در بخش گاز طبیعی و بررسی و پیش بینی تقاضای گاز طبیعی جهت دستیابی به امنیت عرضه انرژی گاز طبیعی و به دنبال آن توسعه پایداراهمیت فراوانی دارد. از این رو در این تحقیق تقاضای گاز طبیعی در بخش های خانگی-تجاری، صنعت و نیروگاه که جزء مصرف کنندگان عمده گاز طبیعی هستند مورد بررسی قرار گرفته و از دو روش arima (autoregressive integrated moving average)...

Journal: :Bulletin of the World Health Organization 1998
R Allard

This article reviews the practical aspects of the use of ARIMA (autoregressive, integrated, moving average) modelling of time series as applied to the surveillance of reportable infectious diseases, with special reference to the widely available SSS1 package, produced by the Centers for Disease Control and Prevention. The main steps required by ARIMA modelling are the selection of the time seri...

2013
Xia Long Yong Wei Jie Li

As to the established gray model based on the linear time-variant and individual prediction model of ARIMA, this article constructs the combined forecasting model based on the gray model and the time series model by means of relative error weighing. This prediction indicates that both the gray model and ARIMA model exert efficient function on the Torpedo development cost prediction, and the com...

Journal: :Fuzzy Sets and Systems 2008
Olga Valenzuela Ignacio Rojas Fernando Rojas Ruiz Héctor Pomares Luis Javier Herrera Alberto Guillén Luisa Marquez Miguel Pasadas

Traditionally, the autoregressivemoving average (ARMA)model has been one of themost widely used linear models in time series prediction. Recent research activities in forecasting with artificial neural networks (ANNs) suggest that ANNs can be a promising alternative to the traditional ARMA structure. These linear models and ANNs are often compared with mixed conclusions in terms of the superior...

Journal: :Entropy 2015
Maria Cristina Carrisi Rita Enoh Tchame Marcel Obounou Sebastiano Pennisi

Extended Thermodynamics of dense gases is characterized by two hierarchies of field equations, which allow one to overcome some restrictions on the generality of the previous models. This idea has been introduced by Arima, Taniguchi, Ruggeri and Sugiyama. In the case of a 14-moment model, they have found the closure of the balance equations up to second order with respect to equilibrium. Here, ...

2004
D. A. Dickey

This paper presents an overview of and introduction to some of the standard time series modeling and forecasting techniques as implemented in SAS with PROC ARIMA and PROC AUTOREG, among others. Examples are presented to illustrate the concepts. In addition to a few initial ARIMA examples, more sophisticated modeling tools will be addressed. Included will be regression models with time series er...

2004
Maria Camargo Walter Priesnitz Filho Marcelo Pinto Angela Santos

This paper presents the use of times series AutoRegressive Integrated Moving Average ARIMA(p,d,q) model with interventions, and neural network back-propagation model in analyzing the behavior of sales in a medium size enterprise located in Rio Grande do Sul Brazil for the period January 1984 – December 2000. The forecasts obtained using the neural network back-propagation model were found to be...

1994
Joseph N. Ginocchio Calvin W. Johnson

We briefly review various mappings of fermion pairs to bosons, including those based on mapping operators, such as Belyaev-Zelevinskii, and those on mapping states, such as Marumori; in particular we consider the work of Otsuka-Arima-Iachello, aimed at deriving the Interacting Boson Model. We then give a rigorous and unified description of state-mapping procedures which allows one to systematic...

2006
Ernest S. Shtatland Ken Kleinman Emily M. Cain

The main objective of this paper is to show potential usefulness of the combination of autoregressive integrated moving average (ARIMA) models and logistic regression with automatic model selection (see our work presented at SUGI’28 and SUGI’29.) Timeseries analysis with ARIMA provides only one perspective of the information in the surveillance data (i.e. the number of patients as a function of...

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