Results 21 to 30 of about 169,157 (233)

A New First-Order Integer-Valued Autoregressive Model with Bell Innovations

open access: yesEntropy, 2021
A Poisson distribution is commonly used as the innovation distribution for integer-valued autoregressive models, but its mean is equal to its variance, which limits flexibility, so a flexible, one-parameter, infinitely divisible Bell distribution may be ...
Jie Huang, Fukang Zhu
doaj   +1 more source

Testing hypotheses of the cause of peripheral thinning of the Greenland Ice Sheet: is land-terminating ice thinning at anomalously high rates? [PDF]

open access: yes, 2008
Recent observations have shown that the periphery of the Greenland ice sheet (GrIS) is thinning rapidly and that this thinning is greatest around marine-terminating outlet glaciers. Several theories have been proposed which provide a link between climate
Krabill, W   +14 more
core   +2 more sources

First-Order Integer-Valued Moving Average Process with Power Series Innovations

open access: yesJournal of Statistical Theory and Applications (JSTA), 2020
In this paper, we introduce a first-order nonnegative integer-valued moving average process with power series innovations based on a Poisson thinning operator (PINMAPS(1)) for modeling overdispersed, equidispersed and underdispersed count time series ...
Eisa Mahmoudi, Ameneh Rostami
doaj   +1 more source

Extremes of Periodic Integer-Valued Sequences with Exponential Type Tails

open access: yesRevstat Statistical Journal, 2006
This paper aims to analyze the extremal properties of periodic integer-valued sequences with marginal distribution belonging to a particular class defined by Anderson [1970. J. Appl. Probab. 7, 99–113] where the tail decays exponentially.
Andreia Hall , Manuel G. Scotto
doaj   +1 more source

The Saffman-Taylor problem for an extremely shear-thinning fluid [PDF]

open access: yes, 2007
We consider a steady flow driven by pushing a finger of gas into a highly shear-thinning power-law fluid, with exponent n, in a Hele-Shaw channel. We formulate the problem in terms of the streamfunction , which satisfies the p-Laplacian equation (with ),
J. King   +3 more
core   +1 more source

Thinning operations for modeling time series of counts—a survey

open access: yes, 2008
Thinning operations, Binomial thinning, Count time series, INAR(1) models,
Christian Weiß, Christian H. Weiß
core   +1 more source

Pre-commercial thinning of beech (Fagus sylvatica L.) [PDF]

open access: yes, 2006
This paper reports early effects of stump height on the growth and natural pruning of potential crop trees after pre-commercial thinning of a young stand of naturally regenerated beech (Fagus sylvatica L.) in Denmark.
Sørensen, Ib Holmgård   +6 more
core   +1 more source

Bivariate Random Coefficient Integer-Valued Autoregressive Model Based on a ρ-Thinning Operator

open access: yesAxioms
While overdispersion is a common phenomenon in univariate count time series data, its exploration within bivariate contexts remains limited. To fill this gap, we propose a bivariate integer-valued autoregressive model.
Chang Liu, Dehui Wang
doaj   +1 more source

Semantical and Grammatical Peculiarities of Binomial Expressions in English [PDF]

open access: yes, 2011
Binomial expressions are a sequence of two or more words or phrases, which consist of elements belonging to the same category. They may be connected by a coordinating conjunction or a preposition.
Котнюк Л. Г.
core   +1 more source

Estimation for random coefficient integer-valued autoregressive model under random environment

open access: yesAdvances in Difference Equations, 2019
A first-order random coefficient integer-valued autoregressive model based on the negative binomial thinning operator under r states random environment is introduced.
Yan Cui, Yun Y. Wang
doaj   +1 more source

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