Computer Science
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007epsc.conf..213m&link_type=abstract
European Planetary Science Congress 2007, Proceedings of a conference held 20-24 August, 2007 in Potsdam, Germany. Online at ht
Computer Science
Scientific paper
Because of the relative nature of compositional data (CODA), i.e., the constraint that component concentrations sum to 100%, when we need to compare two chemical compositions,ratios among individual entries have to be considered rather than difference vector between absolute values of entries. For example, since this multiplicative point of view, the arithmetic mean of two compositions is not located in its middle point. Instead, the geometric mean is its true compositional average. This fact generalizes in the multiplicative compositional combinations of two endmembers compositions. These compositional combinations could be used for applying the sputter-codes. Exospheric density distributions in 1-D and 3-D for all the expected species under ordinary solar wind conditions could be produced.
Barceló-Vidal C.
Lammer Helmut
Martín-Fernández Josep A.
Wurz Peter
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