| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 8JMKD3MGPBW/U6Q33E |
| Repository | sid.inpe.br/mtc-m17@80/2007/06.26.13.59 (restricted access) |
| Last Update | 2008:11.20.18.29.43 (UTC) administrator |
| Metadata Repository | sid.inpe.br/mtc-m17@80/2007/06.26.13.59.32 |
| Metadata Last Update | 2018:06.05.03.30.24 (UTC) administrator |
| Secondary Key | INPE--PRE/ |
| DOI | 10.1016/j.cageo.2007.09.022 |
| ISSN | 0098-3004 |
| Citation Key | NordemannRigoEcheEche:2008:ApSuGr |
| Title | Principal Components and Iterative Regression Analysis of Geophysical Series: Application to Sunspot Group Number (1750-2004)  |
| Year | 2008 |
| Month | Nov. |
| Access Date | 2024, Apr. 28 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 505 KiB |
| 2. Context | |
| Author | 1 Nordemann, Daniel Jean Roger 2 Rigozo, Nivaor Rodolfo 3 Echer, Ezequiel 4 Echer, Mariza Pereira de Souza |
| Resume Identifier | 1 8JMKD3MGP5W/3C9JGT6 2 3 8JMKD3MGP5W/3C9JH3D |
| Group | 1 DGE-CEA-INPE-MCT-BR 2 DGE-CEA-INPE-MCT-BR 3 DGE-CEA-INPE-MCT-BR 4 DGE-CEA-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas Espaciais (INPE) 4 Instituto Nacional de Pesquisas Espaciais (INPE) |
| Journal | Computers and Geosciences |
| Volume | 34 |
| Number | 11 |
| Pages | 1443-1453 |
| History (UTC) | 2007-06-29 19:12:20 :: rosemary -> simone :: 2007-12-19 14:21:34 :: simone -> administrator :: 2008-06-29 02:34:47 :: administrator -> simone :: 2008-11-20 18:30:00 :: simone -> administrator :: 2012-07-13 22:22:45 :: administrator -> simone :: 2013-02-20 15:19:59 :: simone -> administrator :: 2008 2018-06-05 03:30:24 :: administrator -> marciana :: 2008 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | Principal components analysis Regression analysis Geophysical time series Reconstruction sunspot number Prediction solar activity |
| Abstract | We present here an implementation of a least squares iterative regression method applied to the sine functions embedded in the principal components extracted from geophysical time series. This method seems to represent a useful improvement for the non-stationary time series periodicity quantitative analysis. The principal components determination followed by the least squares iterative regression method was implemented in an algorithm written in the Scilab (2006) language. The main result of the method is to obtain the set of sine functions embedded in the series analyzed in decreasing order of significance, from the most important ones, likely to represent the physical processes involved in the generation of the series, to the less important ones that represent noise components. Taking into account the need of a deeper knowledge of the Sun's past history and its implication to global climate change, the method was applied to the Sunspot Number series (17502004). With the threshold and parameter values used here, the application of the method leads to a total of 441 explicit sine functions, among which 65 were considered as being significant and were used for a reconstruction that gave a normalized mean squared error of 0.146.. |
| Area | CEA |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Principal Components and... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | principal components.pdf |
| User Group | administrator rosemary simone |
| Visibility | shown |
| Archiving Policy | denypublisher denyfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EU29DP |
| Dissemination | WEBSCI; PORTALCAPES. |
| Host Collection | lcp.inpe.br/ignes/2004/02.12.18.39 cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel documentstage e-mailaddress electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |