Results 111 to 120 of about 25,546 (258)
Permutation Tests Based on the Copula-Graphic Estimator and Their Use for Survival Tree Construction. [PDF]
Stat MedABSTRACT Survival trees are popular alternatives to Cox or Aalen regression models that offer both modeling flexibility and graphical interpretability. This paper introduces a new algorithm for survival trees that relaxes the assumption of independent censoring. To this end, we use the copula‐graphic estimator to estimate survival functions.
Baur P, Pauly M, Emura T.
europepmc +2 more sources
Transactions of the Philological Society, EarlyView.Abstract In Welsh, in certain tenses, unique forms of the verb for ‘be’ are used in positive clauses. These specialised forms of ‘be’ are incompatible with positive main‐clause declarative complementizers, despite their apparent featural compatibility. For most speakers, they are also blocked from if‐clauses; although, I report on data regarding their ...
Frances Dowle
wiley +1 more source
Transactions of the Philological Society, EarlyView.Abstract Based on an analysis of the Old Literary Tibetan corpus—a corpus of the oldest documented Tibetic language—the present study provides evidence that literary Tibetan v3 verb stems (commonly termed ‘future’) initially encoded passive voice. New arguments put forward in this article range from Trans‐Himalayan nominal morphology to early Tibetan ...
Joanna Bialek
wiley +1 more source
In this paper, we present a new methodology based on vine copulas to estimate multivariate distributions in high dimensions, taking advantage of the diversity of vine copulas.
Dominique Guegan, Pierre-André Maugis
core
Journal of Multivariate Analysis, 2012 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mai, Jan-Frederik, Scherer, Matthias
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Exploring marking methods for the predatory hoverfly Sphaerophoria rueppellii (Diptera: Syrphidae)
Insect Science, EarlyView.As important pollinators and predators of aphids, hoverflies play an important role in ecosystems. This study focuses on identifying the best marking technique for the model species Sphaerophoria rueppellii that can be used to track hoverfly feeding and oviposition sites, evaluating three methods: rubidium (RbCl), fluorescein, and fluorescent dusts ...
Michele Violi +4 more
wiley +1 more source
MODELLING RANDOM COUPLES USING COPULAS MODELADO DE PAREJAS ALEATORIAS USANDO CÓPULAS
Revista Colombiana de Estadística, 2009 Copulas have become a useful tool for the multivariate modelling in both stochastics and statistics. In this article, fundamental properties that allow the characterization of the dependence structure of families of the bivariate distributions defined by
Escarela Gabriel, Hernández Angélica
doaj
Insect Science, EarlyView.Abstract The Sterile Insect Technique (SIT) is an effective strategy for controlling insect pests, such as the Mediterranean fruit fly (Ceratitis capitata, Wiedemann). The effectiveness of the SIT depends on the ability of the sterile males to mate and their capacity to induce sterility in wild females.
Edwin Mauricio Ramírez‐Santos +4 more
wiley +1 more source
Improved Frechet bounds and model-free pricing of multi-asset options
, 2011 Improved bounds on the copula of a bivariate random vector are computed when partial information is available, such as the values of the copula on a given subset of $[0,1]^2$, or the value of a functional of the copula, monotone with respect to the ...
Tankov, Peter
core
Electronic Journal of StatisticsWhen modeling multivariate phenomena, properly capturing the joint extremal behavior is often one of the many concerns. Archimax copulas appear as successful candidates in case of asymptotic dependence. In this paper, the class of Archimax copulas is extended via their stochastic representation to a clustered construction.
Chatelain, Simon +3 more
openaire +3 more sources