نتایج جستجو برای: time series model

تعداد نتایج: 3811299  

Journal: :journal of advances in computer research 2014
haleh nazari homayun motameni babak shirazi

since the pioneering work of zadeh, fuzzy set theory has been applied to amyriad of areas. song and chissom introduced the concept of fuzzy time series andapplied some methods to the enrolments of the university of alabama. thereafter weapply fuzzy techniques for system identification and apply statistical techniques tomodelling system. an automatic methodology framework that combines fuzzytech...

Journal: :Bhartiya Krishi Anusandhan Patrika 2018

In this paper, we propose a new residual analysis method using Fourier series transform into fuzzy time series model for improving the forecasting performance. This hybrid model takes advantage of the high predictable power of fuzzy time series model and Fourier series transform to fit the estimated residuals into frequency spectra, select the low-frequency terms, filter out high-frequency term...

Abstract. Count data over time are observed in many application areas. Many researchers use time series patterns to analyze this data. In this paper, the poisson count time series linear models and negative binomials on this type of data with the explanatory variables are studied. The Likelihood analysis and the evaluation of count time series model based on generalized linear models are pres...

Farimah Mokhatab Rafiei, Mehdi Bijari , Mehdi Khashei ,

  In recent years, various time series models have been proposed for financial markets forecasting. In each case, the accuracy of time series forecasting models are fundamental to make decision and hence the research for improving the effectiveness of forecasting models have been curried on. Many researchers have compared different time series models together in order to determine more efficien...

Journal: :مدیریت آب و آبیاری 0
سلمان شریف آذری مربی گروه مهندسی آب، دانشکدة آب و خاک، دانشگاه زابل، زابل - ایران شهاب عراقی نژاد استادیار گروه مهندسی آبیاری و آبادانی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج - ایران

one of the water resources modeling requirements is sufficient knowledge of long-term series of meteorological and hydrological parameters. in this study the nearest neighbor resampling method presented by lall and sharma was developed. in the developed model, the knn regression was used for time series forecasting instead of local polynomial used in the developed algorithm by prairie. in this ...

Journal: :Asian Journal of Mathematics & Statistics 2010

Journal: :international journal of health policy and management 2013
alireza razzaghi abbas bahrampour mohammad reza baneshi farzaneh zolala

background road traffic accidents and their related deaths have become a major concern, particularly in developing countries. iran has adopted a series of policies and interventions to control the high number of accidents occurring over the past few years. in this study we used a time series model to understand the trend of accidents, and ascertain the viability of applying arima models on data...

Journal: :اکو هیدرولوژی 0
علی حقی زاده استادیار، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه لرستان حسین یوسفی استادیار، دانشکدۀ علوم و فنون و نوین، دانشگاه تهران یزدان یاراحمدی دانشجوی کارشناسی ارشد مهندسی اکو هیدرولوژی، دانشکدۀ علوم و فنون نوین، دانشگاه تهران پروین نورمحمدی دانشجوی کارشناسی ارشد مهندسی آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه لرستان رضوان علیجانی دانشجوی دکتری مهندسی آبخیزداری، دانشکدۀ کشاورزی و منابع طبیعی، دانشگاه لرستان

kahman is the most beneficial river in alashtar city for agriculture and aquiculture. as hydrology processes have random nature, statistics and probability are base of analysis of these processes and time series are used for this purpose. the first step in time series analysis includes parameters variation through time. second step is to stationary data, third is normalization and forth is mode...

Journal: :The Annals of Statistics 1999

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