Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q2670177> ?p ?o }
Showing triples 1 to 86 of
86
with 100 triples per page.
- Q2670177 subject Q5881968.
- Q2670177 subject Q7035969.
- Q2670177 subject Q7334609.
- Q2670177 subject Q7334623.
- Q2670177 subject Q7612002.
- Q2670177 subject Q8383075.
- Q2670177 subject Q8690270.
- Q2670177 abstract "A numerical model determines how a model state at a particular time changes into the model state at a later time. Even if the numerical model were a perfect representation of an actual system (which of course can rarely if ever be the case) in order to make a perfect forecast of the future state of the actual system the initial state of the numerical model would also have to be a perfect representation of the actual state of the system.Data assimilation or, more-or-less synonymously, data analysis is the process by which observations of the actual system are incorporated into the model state of a numerical model of that system. Applications of data assimilation arise in many fields of geosciences, perhaps most importantly in weather forecasting and hydrology. A frequently encountered problem is that the number of observations of the actual system available for analysis is orders of magnitude smaller than the number of values required to specify the model state. The initial state of the numerical model cannot therefore be determined from the available observations alone. Instead, the numerical model is used to propagate information from past observations to the current time. This is then combined with current observations of the actual system using a data assimilation method. Most commonly this leads to the numerical modelling system alternately performing a numerical forecast and a data analysis. This is known as analysis/forecast cycling. The forecast from the previous analysis to the current one is frequently called the background.The analysis combines the information in the background with that of the current observations, essentially by taking a weighted mean of the two; using estimates of the uncertainty of each to determine their weighting factors. The data assimilation procedure is invariably multivariate and includes approximate relationships between the variables. The observations are of the actual system, rather than of the model's incomplete representation of that system, and so may have different relationships between the variables from those in the model. To reduce the impact of these problems incremental analyses are often performed. That is the analysis procedure determines increments which when added to the background yield the analysis. As the increments are generally small compared to the background values this leaves the analysis less affected by 'balance' errors in the analysed increments. Even so some filtering, known as initialisation, may be required to avoid problems, such as the excitement of unphysical wave like activity or even numerical instability, when running the numerical model from the analysed initial state. As an alternative to analysis/forecast cycles, data assimilation can proceed by some sort of continuous process such as nudging, where the model equations themselves are modified to add terms that continuously push the model towards the observations.".
- Q2670177 wikiPageExternalLink pdaf.awi.de.
- Q2670177 wikiPageExternalLink www.CDAcentral.info.
- Q2670177 wikiPageExternalLink www.PDFcentral.info.
- Q2670177 wikiPageExternalLink ide_etal_jmsj97.pdf.
- Q2670177 wikiPageExternalLink www.cdacentral.info.
- Q2670177 wikiPageExternalLink www.data-assimilation.net.
- Q2670177 wikiPageExternalLink Chap1_Overview2.html.
- Q2670177 wikiPageExternalLink frameset.htm.
- Q2670177 wikiPageExternalLink data_assim.html?zoneid=79046.
- Q2670177 wikiPageExternalLink mm5.
- Q2670177 wikiPageExternalLink index.php.
- Q2670177 wikiPageExternalLink www.pdfcentral.info.
- Q2670177 wikiPageExternalLink S0920410513003227.
- Q2670177 wikiPageExternalLink Data+Assimilation+Lecture+Notes.
- Q2670177 wikiPageWikiLink Q10167591.
- Q2670177 wikiPageWikiLink Q102205.
- Q2670177 wikiPageWikiLink Q1036748.
- Q2670177 wikiPageWikiLink Q108376.
- Q2670177 wikiPageWikiLink Q1114042.
- Q2670177 wikiPageWikiLink Q11466.
- Q2670177 wikiPageWikiLink Q11473.
- Q2670177 wikiPageWikiLink Q1274195.
- Q2670177 wikiPageWikiLink Q1287251.
- Q2670177 wikiPageWikiLink Q1507383.
- Q2670177 wikiPageWikiLink Q1516983.
- Q2670177 wikiPageWikiLink Q16240810.
- Q2670177 wikiPageWikiLink Q163016.
- Q2670177 wikiPageWikiLink Q1693522.
- Q2670177 wikiPageWikiLink Q170424.
- Q2670177 wikiPageWikiLink Q182505.
- Q2670177 wikiPageWikiLink Q182868.
- Q2670177 wikiPageWikiLink Q183160.
- Q2670177 wikiPageWikiLink Q1851405.
- Q2670177 wikiPageWikiLink Q18822.
- Q2670177 wikiPageWikiLink Q1971426.
- Q2670177 wikiPageWikiLink Q200726.
- Q2670177 wikiPageWikiLink Q201984.
- Q2670177 wikiPageWikiLink Q206300.
- Q2670177 wikiPageWikiLink Q2068418.
- Q2670177 wikiPageWikiLink Q20736000.
- Q2670177 wikiPageWikiLink Q208042.
- Q2670177 wikiPageWikiLink Q208641.
- Q2670177 wikiPageWikiLink Q209363.
- Q2670177 wikiPageWikiLink Q216320.
- Q2670177 wikiPageWikiLink Q2308831.
- Q2670177 wikiPageWikiLink Q230945.
- Q2670177 wikiPageWikiLink Q23649.
- Q2670177 wikiPageWikiLink Q26540.
- Q2670177 wikiPageWikiLink Q2905654.
- Q2670177 wikiPageWikiLink Q3059012.
- Q2670177 wikiPageWikiLink Q3072268.
- Q2670177 wikiPageWikiLink Q40631.
- Q2670177 wikiPageWikiLink Q42250.
- Q2670177 wikiPageWikiLink Q446191.
- Q2670177 wikiPageWikiLink Q46611.
- Q2670177 wikiPageWikiLink Q47528.
- Q2670177 wikiPageWikiLink Q476773.
- Q2670177 wikiPageWikiLink Q486902.
- Q2670177 wikiPageWikiLink Q5468164.
- Q2670177 wikiPageWikiLink Q5881968.
- Q2670177 wikiPageWikiLink Q643874.
- Q2670177 wikiPageWikiLink Q7035969.
- Q2670177 wikiPageWikiLink Q7334609.
- Q2670177 wikiPageWikiLink Q7334623.
- Q2670177 wikiPageWikiLink Q7358064.
- Q2670177 wikiPageWikiLink Q7612002.
- Q2670177 wikiPageWikiLink Q7978244.
- Q2670177 wikiPageWikiLink Q8092.
- Q2670177 wikiPageWikiLink Q8104.
- Q2670177 wikiPageWikiLink Q81809.
- Q2670177 wikiPageWikiLink Q837552.
- Q2670177 wikiPageWikiLink Q8383075.
- Q2670177 wikiPageWikiLink Q846780.
- Q2670177 wikiPageWikiLink Q852817.
- Q2670177 wikiPageWikiLink Q8690270.
- Q2670177 wikiPageWikiLink Q891766.
- Q2670177 comment "A numerical model determines how a model state at a particular time changes into the model state at a later time.".
- Q2670177 label "Data assimilation".