Results 11 to 20 of about 10,501 (161)

Investigation of the performance and accuracy of multivariate timeseries models in predicting EC and TDS values of the rivers of Urmia Lake Basin [PDF]

open access: yesJournal of Advances in Environmental Health Research, 2017
Considering the complexity of hydrological processes, it seems that multivariate methods may enhance the accuracy of time series models and the results obtained from them by taking more influential factors into account.
Mohammad Soleimani   +2 more
doaj   +1 more source

Assessment and Analysis of River Drought Volume by Using Historical and Forecasted Data (Case Study: Western Rivers of Lake Urmia) [PDF]

open access: yesعلوم و مهندسی آبیاری, 2015
Flood and drought analysis accuracy and estimating return period of droughts depend on selecting type of distribution functions and method of estimating parameters.
Keivan Khalili   +2 more
doaj   +1 more source

PROJECTION OF THE INFLATION RATE IN PANGKALPINANG CITY USING THE AUTOREGRESSIVE MOVING AVERAGE (ARMA)

open access: yesBarekeng, 2023
Inflation is one of the variables in the macro economy that can affect people's welfare and is defined as a complex phenomenon due to general and continuous price increases.
Desy Yuliana Dalimunthe   +4 more
doaj   +1 more source

Modelling The Volatility of Frankfurt Stock Exchange (DAX) Returns Using hybrid Models [PDF]

open access: yesFinancial Markets, Institutions and Risks
Recently, the interest of researchers in the use of hybrid models in the process of analyzing model time series with fluctuations and forecasting fluctuations in financial time series has increased significantly. Hybrid ARMA-GARCH models were created for
Hadj Khelifa   +2 more
doaj   +1 more source

Análises estratégicas de conflitos pela região da Cachemira

open access: yesColeção Meira Mattos, 2007
O presente artigo apresenta uma análise estratégica do conflito pela região da Cachemira. De jeito nenhum pretende esgotar o assunto, mas apresentar o jeito de fazer esse tipo de análise na Escola Superior de Guerra do Exército Argentino (equivalente à ...
Luis Pablo Guimpel
doaj   +2 more sources

Volatility analysis and forecasting of vegetable prices using an ARMA‐GARCH model: An application of the CF filter and seasonal adjustment method to Korean green onions

open access: yesAgribusiness, EarlyView.
Abstract The vegetable market experiences significant price fluctuations due to the complex interplay of trend, cyclical, seasonal, and irregular factors. This study takes Korean green onions as an example and employs the Christiano–Fitzgerald filter and the CensusX‐13 seasonal adjustment methods to decompose its price into four components: trend ...
Yiyang Qiao, Byeong‐il Ahn
wiley   +1 more source

The Relationship Between Interest Rates and Agricultural Commodity Price Dynamics

open access: yesAgribusiness, EarlyView.
ABSTRACT The U.S. Federal Reserve has undertaken several interest rate interventions in the past decade. This study explores the relationship between U.S. corn and soybean prices and Federal Reserve monetary policy interventions, in the short and long run.
Zhining Sun, Ani L. Katchova
wiley   +1 more source

A emergência do Brasil: consequências para o país e para o mundo

open access: yesColeção Meira Mattos, 2008
O objetivo do autor é apresentar a ascensão do Brasil, particularmente nos campos econômico, militar e político, e as conseqüências para o país e o mundo, bem como esclarecer a forma como ele é hoje visto na Europa, mais especificamente na França: uma ...
José Carlos Braga Avellar
doaj   +2 more sources

Origin, evolution and biogeographic dynamics of the European rabbit (Oryctolagus cuniculus) in Southwestern Europe

open access: yesThe Anatomical Record, EarlyView.
Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley   +1 more source

Necessidade x disponibilidade de infra-estrutura de transporte para a defesa nacional

open access: yesColeção Meira Mattos, 2007
A problemática da necessidade versus disponibilidade de rodovias e ferrovias para o desenvolvimento nacional é um assunto prioritário que transcende governos, sendo mesmo uma questão de Estado.
Riyuzo Ikeda
doaj   +2 more sources

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