نتایج جستجو برای: temperature time series

تعداد نتایج: 2488426  

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
e. milani h. poorazarang sh. vatan khah h. vakilian

inulin is widely used in functional foods throughout the world for its health-promoting and technological properties. helianthus tuberosus is cultivated widely in the northern part of iran. helianthus tuberosus can be a valuable source of inulin. to optimize conventional extraction of inulin, various combinations of time, temperature, and solvent: solid ratio, were used. in this research, a ser...

Journal: :Oceanography 2013

ژورنال: پژوهش های ریاضی 2015
Iranpanah , N., Mikelani , P,

One of the main goals of studying the time series is estimation of prediction interval based on an observed sample path of the process. In recent years, different semiparametric bootstrap methods have been proposed to find the prediction intervals without any assumption of error distribution. In semiparametric bootstrap methods, a linear process is approximated by an autoregressive process. The...

 The study of meteorological characteristics and its variability is important in assessing the climate change impacts for water resources management. Trend analysis of hydrological and meteorological time series is a method for determining the change in climate variables that is performed with different parametric and non-parametric methods. In this research, the annual, seasonal and monthly tr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی 1393

abstract: the present study is an attempt to find out cultural exophoric references in iranian high-school elt textbooks and touch stone series to compare the frequency of occurrence of such references in these books. the purpose is to find out which of the series of the books under investigation impose a greater referential burden on efl learners as far as their reading comprehension of the ...

2015
Yoosoon Chang Chang Sik Kim Joon Y. Park Sungkeun Park William Nord

We analyze a time series of global temperature anomaly distributions to identify and estimate persistent features in climate change. In our study, temperature densities, obtained from globally distributed data over the period from 1850 to 2012, are regarded as a time series of functional observations that are changing over time. We employ a formal test for the existence of functional unit roots...

Journal: :international journal of advanced biological and biomedical research 2013
pezhman alahbakhshian farsani mahmoud habibnejad roshan ghorban vahbzade karim solaimani

climatic parameters in time and space scales of change are for many reasons of changes and how they should be based on observations using a statistical method to be determined. analysis of the most widely used statistical methods that assess potential climate change on hydrological time series, such series of precipitation, temperature and flow rate used. this study of 11 synoptic,rain gage and...

Journal: :تحقیقات اقتصادی 0
غلامعلی شرزه ای دانشیار دانشکدة اقتصاد دانشگاه تهران مهدی احراری پژوهشگر اقتصادی دانشکدة اقتصاد دانشگاه تهران حسن فخرایی کارشناس ارشد اقتصاد محیط زیست دانشکدة اقتصاد دانشگاه تهران

conventionally, regression and time series analyses have been employed in modeling water demand forecasts. in recent years, the relatively new technique of neural networks (nns) has been proposed as an efficient tool for modeling and forecasting. the objective of this study is to investigate the relatively new technique of gmdh – type neural networks for the use of forecasting long – term urban...

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