Results 21 to 30 of about 25,752 (301)
Phylogenetic structure of aquatic plant assemblages in a climate sequence [PDF]
Rodriguésia, 2022 Floristic studies of aquatic plants and flora associated with aquatic ecosystems carried out in the Neotropical region have demonstrated the predominance and co-occurrence of the same plant families under different climatic conditions.
Hermes de Oliveira Machado-Filho +2 more
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A Cointegrated Regime-Switching Model Approach with Jumps Applied to Natural Gas Futures Prices
Risks, 2017 Energy commodities and their futures naturally show cointegrated price movements. However, there is empirical evidence that the prices of futures with different maturities might have, e.g., different jump behaviours in different market situations ...
Daniel Leonhardt +2 more
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Frontiers in Plant Science, 2020 Due to the environmental conditions presented in arid zones, it is expected to have a high influence of deterministic processes over the community assemblages.
Nguyen E. López-Lozano +4 more
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JTAM (Jurnal Teori dan Aplikasi Matematika), 2023 Limitation within the WFTS model, which relies on midpoints within intervals and linguistic variable relationships for assigning weights. This reliance can result in reduced accuracy, especially when dealing with extreme values during trend to ...
Agus Fachrur Rozy +2 more
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Deterministic seasonality in Dickey–Fuller tests: should we care? [PDF]
Empirical Economics, 2006 This paper investigates the properties of Dickey–Fuller tests for seasonally unadjusted quarterly data when deterministic seasonality is present but it is neglected in the test regression. While for the random walk case the answer is straightforward, an extensive Monte Carlo study has to be performed for more realistic processes and testing strategies.
openaire +2 more sources
PLoS ONE, 2015 Ecological communities are structured by both deterministic and stochastic processes. We investigated phylogenetic patterns at regional and local scales to understand the influences of seasonal processes in shaping the structure of anuran communities in ...
Clarissa de Araújo Martins +5 more
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Gestão & Produção, 2007 Pretendeu-se com este trabalho de pesquisa detectar a existência dos componentes estocásticos e/ou determinísticos de tendência, ciclo, e sazonalidade nos preços do mercado spot da principal commodity agrícola do Brasil: o café.
Wagner Moura Lamounier
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Testing for Deterministic Components in Vector Seasonal Time Series
Open Journal of Statistics, 2011 Certain locally optimal tests for deterministic components in vector time series have associated sampling distributions determined by a linear combination of Beta variates. Such distributions are nonstandard and must be tabulated by Monte Carlo simulation.
Gallego Gómez, José Luis +1 more
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Generalized seasonal autoregressive integrated moving average models for count data with application to malaria time series with low case numbers. [PDF]
PLoS ONE, 2013 INTRODUCTION: With the renewed drive towards malaria elimination, there is a need for improved surveillance tools. While time series analysis is an important tool for surveillance, prediction and for measuring interventions' impact, approximations by ...
Olivier J T Briët +2 more
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A Two-Strain Deterministic Dengue Model With Seasonality Effect
Science Proceedings Series, 2019 A compartmental model is proposed to describe the dynamics of vector-host interations for dengue disease transmission with coexistence of two virus serotypes. The model is modified to incorporate seasonal-dependent mosquito birth rate in order to examine the influence of climatic factors such as rainfall and temperature on the dynamics of mosquito ...
Afeez Abidemi +2 more
openaire +2 more sources