Results 1 to 10 of about 2,196,460 (253)

Trend analysis of the airborne fraction and sink rate of anthropogenically released CO2 [PDF]

open access: yesBiogeosciences, 2019
Is the fraction of anthropogenically released CO2 that remains in the atmosphere (the airborne fraction) increasing? Is the rate at which the ocean and land sinks take up CO2 from the atmosphere decreasing?
M. Bennedsen   +5 more
doaj   +1 more source

The Role of Low Temperature Waste Heat Recovery in Achieving 2050 Goals: A Policy Positioning Paper

open access: yesEnergies, 2020
Urban waste heat recovery, in which low temperature heat from urban sources is recovered for use in a district heat network, has a great deal of potential in helping to achieve 2050 climate goals.
Edward Wheatcroft   +4 more
doaj   +1 more source

Investor sentiment and foreign financial flows: Evidence from South Africa [PDF]

open access: yesZbornik radova Ekonomskog fakulteta u Rijeci : časopis za ekonomsku teoriju i praksu, 2019
Foreign financial flows to emerging markets have increasingly become important following the opening of financial markets globally. These financial flows are a function of a country’s fundamentals related to future productivity.
Hilary Tinotenda Muguto   +2 more
doaj   +1 more source

A Parsimonious Test of Constancy of a Positive Definite Correlation Matrix in a Multivariate Time-Varying GARCH Model

open access: yesEconometrics, 2022
We construct a parsimonious test of constancy of the correlation matrix in the multivariate conditional correlation GARCH model, where the GARCH equations are time-varying. The alternative to constancy is that the correlations change deterministically as
Jian Kang   +4 more
doaj   +1 more source

Language time series analysis [PDF]

open access: yesPhysica A: Statistical Mechanics and its Applications, 2006
21 pages, 5 figures, accepted in Physica ...
Kosmidis, Kosmas   +2 more
openaire   +2 more sources

A Three-Stage Nonparametric Kernel-Based Time Series Model Based on Fuzzy Data

open access: yesMathematics, 2023
In this paper, a nonlinear time series model is developed for the case when the underlying time series data are reported by LR fuzzy numbers. To this end, we present a three-stage nonparametric kernel-based estimation procedure for the center as well as ...
Gholamreza Hesamian   +2 more
doaj   +1 more source

Efficient Bayesian inference for natural time series using ARFIMA processes [PDF]

open access: yesNonlinear Processes in Geophysics, 2015
Many geophysical quantities, such as atmospheric temperature, water levels in rivers, and wind speeds, have shown evidence of long memory (LM). LM implies that these quantities experience non-trivial temporal memory, which potentially not only enhances ...
T. Graves   +3 more
doaj   +1 more source

Measuring the Topological Time Irreversibility of Time Series With the Degree-Vector-Based Visibility Graph Method

open access: yesFrontiers in Physics, 2021
Time irreversibility of a time series, which can be defined as the variance of properties under the time-reversal transformation, is a cardinal property of non-equilibrium systems and is associated with predictability in the study of financial time ...
Ryutaro Mori, Ruiyun Liu, Yu Chen
doaj   +1 more source

EVALUATING THE IMPACT OF DATA.GOV.RO ON THE ACADEMIC RESEARCH [PDF]

open access: yesAnalele Universităţii Constantin Brâncuşi din Târgu Jiu : Seria Economie, 2022
In the context of the digital revolution, data is the most valuable resource which gains in value the more it is used. Freely available open source data and institutional data repositories encourage and connect, both academia and industry.
MIRICĂ ANDREEA, PETCU IONELA-ROXANA
doaj  

Time series analysis in environmental epidemiology: challenges and considerations

open access: yesInternational Journal of Occupational Medicine and Environmental Health, 2023
In environmental epidemiology, time series analyses represent a widely used statistical tool. However, though being commonly used, there is soften confusion regarding the specific requirements, such as which link function might be most appropriate, when ...
Sandra Gudziunaite   +3 more
doaj   +1 more source

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