| dc.creator | NOGUEIRA, ANDRE L. | |
| dc.creator | MUNITA, CASIMIRO S. | |
| dc.date | 2020 | |
| dc.date | 2020-10-23T18:52:35Z | |
| dc.date | 2020-10-23T18:52:35Z | |
| dc.date.accessioned | 2023-09-28T14:16:32Z | |
| dc.date.available | 2023-09-28T14:16:32Z | |
| dc.identifier | 0236-5731 | |
| dc.identifier | http://repositorio.ipen.br/handle/123456789/31485 | |
| dc.identifier | 3 | |
| dc.identifier | 325 | |
| dc.identifier | 10.1007/s10967-020-07186-6 | |
| dc.identifier | 0000-0003-0546-1044 | |
| dc.identifier | 23.61 | |
| dc.identifier | 38.71 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/9001708 | |
| dc.description | The aim of this paper is to evaluate the impact of three standardization methods (z-score, log10
and improved min???max)
in determining the number of clusters for a dataset of 146 archaeological ceramic fragments in which mass fractions of
chemical elements were determined by INAA. The results showed a tendency towards clustering, which did not occur to
the non-standardized data. The standardization methods indicated the presence of three groups within the database. Quality
evaluation of these clusters, by means of internal validation indexes, showed that the best performance was obtained with
the log10
transformation. This transformation also performed well in the calculation of compactness, while the improved
min???max showed better performance in terms of separability. | |
| dc.format | 719-724 | |
| dc.relation | Journal of Radioanalytical and Nuclear Chemistry | |
| dc.rights | openAccess | |
| dc.subject | archaeological sites | |
| dc.subject | cesium | |
| dc.subject | europium | |
| dc.subject | thorium | |
| dc.subject | isotope dating | |
| dc.subject | neutron activation analysis | |
| dc.subject | quantitative chemical analysis | |
| dc.subject | standardization | |
| dc.title | Quantitative methods of standardization in cluster analysis | |
| dc.type | Artigo de peri??dico | |
| dc.coverage | I | |
