4 citations · 15 across the 21 of their papers we have counts for
3 papers · 1 filter
Extremal behaviour of a periodically controlled sequence with imputed values
Helena Ferreira, Ana Paula Martins, Maria da Graça Temido
Extreme events are a major concern in statistical modeling. Ran\-dom missing data can constitute a problem when modeling such rare events. Imputation is crucial in these situations…
A crossinggram for random fields on lattices
Helena Ferreira, Marta Ferreira, Luís A. Alexandre
The modeling of risk situations that occur in a space-time framework can be done using max-stable random fields on lattices. Although the summary coefficients for the spatial and t…
Tail dependence and smoothness
Helena Ferreira, Marta Ferreira
The risk of catastrophes is related to the possibility of occurring extreme values. Several statistical methodologies have been developed in order to evaluate the propensity of a p…