Consulta: subjectFacets:"Transfer function"
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Data/hora: 27/07/2024 02:02:47

From the help desk: Transfer functions
Provedor de dados: 31
Autores: McDowell,   Allen.
The question often arises as to whether one can estimate a transfer function model using Stata. While Stata does not currently have a convenience command for doing so, this article will demonstrate that estimating such a model can be accomplished quite easily using Stata’s arima command. The classic text for transfer function modeling is Box, Jenkins, and Reinsel (1994); however, a more concise presentation can be found in Brockwell and Davis (1991).
Tipo: Journal Article
Palavras-chave: Arima; Xcorr; Corrgram; Transfer function; Impulse-response function; Autocorrelation function; Cross-correlation function; Pre-whitened; Linear filter; Difference equation; Research Methods/ Statistical Methods.
Ano: 2002
URL: http://purl.umn.edu/115952

Late Holocene oceanographic and climate change from the western European margin: the results of the HOLSMEER project
Provedor de dados: 5
Autores: Scourse, James; Sejrup, Hans Petter; Jones, Phil D.
The underlying aim of the HOLSMEER project has been to improve our understanding of natural climate variability through the search for, interpretation and quantification of, climatic variability in very high-resolution shallow marine records from Atlantic Europe covering the last 2000 years. This has been achieved through detailed analyses of a series of coastal and shallow marine sites spanning the Atlantic seaboard from Iberia to western Norway, and extending across to Iceland. HOLSMEER partners have documented pronounced instability in the thermohaline circulation (THC) during the period immediately prior to the recent significant anthropogenic impact on the environment. For the first time we have been able to document that these changes in the coastal...
Tipo: Text
Palavras-chave: Holocene; Palaeoclimate; Marine; Thermohaline circulation; Sea level; Arctica islandica; Transfer function; HOLSMEER project; North Atlantic Ocean; Western European margin.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/00234/34504/33458.pdf

Paleo-depths reconstruction of the last 550,000 years based on the transfer function on recent and Quaternary benthic foraminifers of the East Corsica margin
Provedor de dados: 5
Autores: Minto'O, Charlie Morelle Angue; Silva Jacinto, Ricardo; Bassetti, Maria-angela; Jouet, Gwenael.
In this study, the model H(i) = 109.6103 + C1 × F1(i) + C2 × F2(i) + … + C33 × F33(i) obtained from depth modelling based on 33 recent benthic foraminifer species distribution, has been applied to the fossil benthic foraminifers from the borehole GDEC-4-2 drilled at a water depth of 491 m, in the East-Corsica basin, covering the last 550,000 years. The obtained variations of the paleo-depths show a medium correlation with the oscillations of the relative sea level and also with the fluctuations of the oxygen isotopic ratio (δ18O G. bulloides and δ18O C. pachyderma–C. wuellerstorfi). This newly developed transfer function is accompanied by an error margin of ± 86 m, suggesting that this model will probably be more suitable for a time scale of the order of a...
Tipo: Text
Palavras-chave: Benthic foraminifers; East-Corsica basin; Paleo-depths; Transfer function.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00463/57477/64237.pdf

Sea Surface Ka-Band Doppler Measurements: Analysis and Model Development
Provedor de dados: 5
Autores: Yurovsky, Yury; Kudryavtsev, Vladimir; Grodsky, Semyon; Chapron, Bertrand.
Multi-year field measurements of sea surface Ka-band dual-co-polarized (vertical transmit–receive polarization (VV) and horizontal transmit–receive polarization (HH)) radar Doppler characteristics from an oceanographic platform in the Black Sea are presented. The Doppler centroid (DC) estimated using the first moment of 5 min averaged spectrum, corrected for measured sea surface current, ranges between 0 and ≈1 m/s for incidence angles increasing from 0 to 70∘ . Besides the known wind-to-radar azimuth dependence, the DC can also depend on wind-to-dominant wave direction. For co-aligned wind and waves, a negative crosswind DC residual is found, ≈−0.1 m/s, at ≈20 ∘ incidence angle, becoming negligible at ≈ 60 ∘ , and raising to, ≈+0.5 m/s, at 70∘ . For our...
Tipo: Text
Palavras-chave: Radar; Scatterometer; Ocean; Backscatter; Doppler shift; Doppler centroid; Sea surface current; Wind drift; Modulation; Transfer function; Empirical model.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60077/63399.pdf