Results 101 to 110 of about 5,520 (288)

Modelling joint distribution of crop plant yields and prices with use of a copula function

open access: yes, 2013
The paper constitutes an attempt at modelling the joint distribution of crop plant yields and prices in Poland. The main objective of the paper was to examine the usefulness of the copula function for the task and the selection of suitable marginal ...
Kobus, P.
core  

Statistical analysis of dependent competing risks model in constant stress accelerated life testing with progressive censoring based on copula function

open access: yes, 2018
In this paper, we consider the statistical analysis for the dependent competing risks model in the constant stress accelerated life testing with Type-II progressive censoring. It is focused on two competing risks from Lomax distribution.
Yimin Shi   +3 more
core   +1 more source

Extending the hyper‐logistic model to the random setting: New theoretical results with real‐world applications

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
We develop a full randomization of the classical hyper‐logistic growth model by obtaining closed‐form expressions for relevant quantities of interest, such as the first probability density function of its solution, the time until a given fixed population is reached, and the population at the inflection point.
Juan Carlos Cortés   +2 more
wiley   +1 more source

Dose Correlation of Panax ginseng and Atractylodes macrocephala Koidz. Drug Pairs in the Chinese Medicine Prescription Based on the Copula Function. [PDF]

open access: yesEvid Based Complement Alternat Med, 2021
Lin W   +12 more
europepmc   +1 more source

SYMMETRY AND COMPLEMENT FUNCTIONS OF A COPULA

open access: yesCommunications, Faculty Of Science, University of Ankara Series A1Mathematics and Statistics, 2002
Given a copula we target another copula and attempt to link themby using various two place functions.
SUNGUR ENGİN, A.   +2 more
openaire   +3 more sources

Quantitative Analysis of Power System Flexibility Based on K-Means Method and Copula Function

open access: yes, 2022
Power system flexibility analysis is important for grid development. For solving this problem, this paper constructs a flexible resource model of the power system to analyze the flexibility. The k-means method is adopted to classify the data.
Ma, Ruicong   +5 more
core   +1 more source

Bivariate postprocessing of wind vectors

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
We introduce three novel bivariate postprocessing approaches and analyze their performance for joint postprocessing of bivariate wind‐vector components in Germany. Bivariate vine‐copula‐based models, a bivariate gradient‐boosted version of ensemble model output statistics (EMOS), and a bivariate distributional regression network (DRN) are compared with
Ferdinand Buchner   +3 more
wiley   +1 more source

Testing the symmetry of a dependence structure with a characteristic function

open access: yesDependence Modeling, 2018
This paper proposes competing procedures to the tests of symmetry for bivariate copulas of Genest, Nešlehová and Quessy (2012). To this end, the null hypothesis of symmetry is expressed in terms of the copula characteristic function that uniquely ...
Bahraoui Tarik   +2 more
doaj   +1 more source

Fast variable stiffness composite cylinder uncertainty analysis by using reanalysis assisted Copula function

open access: yes, 2016
There are lots of uncertainties in variable-stiffness composite materials such as material properties, fibre volume fraction, geometries at various scale and matrix porosity.
Enying Li   +5 more
core   +1 more source

Statistical post‐processing of operational dual‐resolution wind‐speed ensemble forecasts

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
The performance of raw and post‐processed 50‐member medium‐ and 100‐member extended‐range 10‐m wind‐speed forecasts of the European Centre for Medium‐Range Weather Forecasts and their various dual‐resolution combinations is investigated. Results show that post‐processing improves skill and reduces the differences between the various configurations ...
Sándor Baran, Mária Lakatos
wiley   +1 more source

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