Results 51 to 60 of about 42,928 (197)

Precise Estimation of Cosmological Parameters Using a More Accurate Likelihood Function

, 2010
The estimation of cosmological parameters from a given data set requires a construction of a likelihood function which, in general, has a complicated functional form.
A. Sklar, Kiyotomo Ichiki, Masanori Sato, R. B. Nelsen, S. Miyazaki, Tsutomu T. Takeuchi   +5 more
core   +1 more source

Pair-copula constructions of multiple dependence [PDF]

, 2006
Building on the work of Bedford, Cooke and Joe, we show how multivariate data, which exhibit complex patterns of dependence in the tails, can be modelled using a cascade of pair-copulae, acting on two variables at a time.
Aas, Kjersti, Bakken, Henrik, Czado, Claudia, Frigessi, Arnoldo   +3 more
core   +2 more sources

Constructing a bivariate distribution function with given marginals and correlation: application to the galaxy luminosity function

, 2010
We show an analytic method to construct a bivariate distribution function (DF) with given marginal distributions and correlation coefficient. We introduce a convenient mathematical tool, called a copula, to connect two DFs with any prescribed dependence ...
Ball, Benabed, Binggeli, Blanton, Boissier, Boquien, Boselli, Buat, Buat, Buat, Buat, Cambanis, Chapman, Chołoniewski, Cowie, Cross, D'Este, Damen, Damen, De Lapparent, Driver, Farlie, Feulner, Fontanot, Gumbel, Heavens, Hettmansperger, Hirashita, Hollander, Huang, Iglesias-Páramo, Iglesias-Páramo, Jiang, Johnson, Koen, Kotz, Lin, Martin, Morgenstern, Nelsen, Noeske, Noeske, Panter, Salpeter, Saunders, Saunders, Schafer, Schechter, Scherrer, Schucany, Sklar, Stuart, Takeuchi, Takeuchi, Takeuchi, Takeuchi, Takeuchi, Trivedi, Valz, Willmer, Wyder   +60 more
core   +1 more source

From anaphoric pronoun to copula in Zande [PDF]

, 2012
In Zande there is a particle ni which has two syntactic functions. The first one is that of an ana¬phoric pronoun (cf. ex. 1. for its use as a possessive pronoun) which is neutral with regard to gender, number, and syntactic function. The second function
Pasch, Helma
core  

Weak convergence of the weighted empirical beta copula process

, 2017
The empirical copula has proved to be useful in the construction and understanding of many statistical procedures related to dependence within random vectors.
Berghaus, Betina, Segers, Johan
core   +1 more source

Types of dependence and time-dependent association between two lifetimes in single parameter copula models [PDF]

, 2006
Most publications on modeling insurance contracts on two lives, assuming dependence of the two lifetimes involved, focus on the time of inception of the contract.
Spreeuw, J.
core   +1 more source

Spatial Copula Model for Imputing Traffic Flow Data from Remote Microwave Sensors

Sensors, 2017
Issues of missing data have become increasingly serious with the rapid increase in usage of traffic sensors. Analyses of the Beijing ring expressway have showed that up to 50% of microwave sensors pose missing values.
Xiaolei Ma, Sen Luan, Bowen Du, Bin Yu
doaj   +1 more source

Extreme value copula estimation based on block maxima of a multivariate stationary time series [PDF]

, 2013
The core of the classical block maxima method consists of fitting an extreme value distribution to a sample of maxima over blocks extracted from an underlying series. In asymptotic theory, it is usually postulated that the block maxima are an independent
Bücher, Axel, Segers, Johan
core   +2 more sources

RELIABILITY ANALYSIS OF FAILURE RELATED MECHANICAL PARTS BASED ON VINE COPULA MODEL

Jixie qiangdu, 2019
Aiming at mechanical parts for multi-failure modes,the advantages of using Copula functions to describe correlations,a reliability modeling method for multi-failure mode related mechanical parts is proposed.
HU QiGuo, ZHOU Song
doaj  

Modeling of multi-variable correlation degradation process based on copula function and improved particle swarm optimization algorithm [PDF]

AIP Advances
With the increasing complexity of modern equipment systems, ignoring the correlation between multi-component and multi-performance degradation processes can lead to significant deviations in reliability assessment.
Xinjian Gao, Enzhi Dong, Zhonghua Cheng, Tielu Gao, Liang Wen, Zhiyuan Yang   +5 more
doaj   +1 more source