نتایج جستجو برای: مدل sarima
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آگاهی از روند متغیرهای کلان اقتصادی همواره برای اقتصاددانان، برنامه¬ریزان و سیاست¬گذاران اهمیت بسیاری داشته است. از این¬رو، همواره سعی شده¬است که پیش¬بینی این متغیرها با کمترین خطای ممکن صورت بگیرد. هدف مطالعه حاضر، مقایسه مدل¬های پیش¬بینی تک¬متغیره شامل روش¬های اقتصادسنجی و شبکه¬های هوش¬مصنوعی برای پیش¬بینی رشد بخش کشاورزی ایران است. بدین منظور روش¬های، اقتصادسنجی مدل خودرگرسیون میانگین متحرک ...
Influenza as a severe infectious disease has caused catastrophes throughout human history, and every pandemic of influenza has produced a great social burden. We compiled monthly data of influenza incidence from all provinces and autonomous regions in mainland China from January 2004 to December 2011, comprehensively evaluated and classified these data, and then randomly selected 4 provinces wi...
BACKGROUND Acute diabetic emergencies are often managed by prehospital Emergency Medical Services (EMS). The projected growth in prevalence of diabetes is likely to result in rising demand for prehospital EMS that are already under pressure. The aims of this study were to model the temporal trends and provide forecasts of prehospital attendances for diabetic emergencies. METHODS A time series...
BACKGROUND The past decade witnessed an increment in the incidence of hand foot mouth disease (HFMD) in the Pacific Asian region; specifically, in Guangzhou China. This emphasized the requirement of an early warning system designed to allow the medical community to better prepare for outbreaks and thus minimize the number of fatalities. METHODS Samples from 1,556 inpatients (hospitalized) and...
Inflation forecasting has been and continues to be an important issue for the world’s economies. Governments, through their central banks, watch closely inflation indicators make national decisions policies. This study proposes forecast rate in five Latin American emerging economies based on commonly used seasonal autoregressive integrated moving average (SARIMA) approach combined with long sho...
Accurate incidence forecasting of infectious disease is critical for early prevention and for better government strategic planning. In this paper, we present a comprehensive study of different forecasting methods based on the monthly incidence of typhoid fever. The seasonal autoregressive integrated moving average (SARIMA) model and three different models inspired by neural networks, namely, ba...
This paper describes the development of an empirical model to forecast epidemics of Ross River virus (RRV) disease using the multivariate seasonal auto-regressive integrated moving average (SARIMA) technique in Brisbane, Australia. We obtained computerized data on notified RRV disease cases, climate, high tide, and population sizes in Brisbane for the period 1985-2001 from the Queensland Depart...
This study aims at modelling Nigerian total livebirths data, and to select the appropriate model for the disaggregated livebirths series among the proposed univariate stochastic time series models, based on in-sample fitting. Forecast of demographic variables such as births has a great influence on the growth of a population with respect to its demands on various systems such as education, heal...
Analysing and modelling efforts on production throughput are getting more complex due to random variables in today’s dynamic production systems. The objective of this study is to take multiple random variables of production into account when aiming for production throughput with higher accuracy of prediction. In the dynamic manufacturing environment, production lines have to cope with changes i...
This paper proposes a hybrid methodology that exploits the unique strength of the seasonal autoregressive integrated moving average (SARIMA) model and the support vector machines (SVM) model in forecasting seasonal time series. The seasonal time series data of Taiwan’s machinery industry production values were used to examine the forecasting accuracy of the proposed hybrid model. The forecastin...
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