Results 31 to 40 of about 5,003,510 (291)

Quantitative Weight and Two-Particle Search Algorithm to Optimize Aero-Stealth Performance of a Backward Inclined Vertical Tail

open access: yesAerospace, 2023
To study the influence of the tilt-back design of a vertical tail on its aerodynamic stealth characteristics, an optimization method based on a quantitative weight coefficient and a two-particle search algorithm is presented.
Zeyang Zhou, Jun Huang
doaj   +1 more source

Inferring heavy tails of flood distributions through hydrograph recession analysis [PDF]

open access: yesHydrology and Earth System Sciences, 2023
Floods are often disastrous due to underestimation of the magnitude of rare events. Underestimation commonly happens when the magnitudes of floods follow a heavy-tailed distribution, but this behavior is not recognized and thus neglected for flood hazard
H.-J. Wang   +6 more
doaj   +1 more source

Semiparametric lower bounds for tail index estimation [PDF]

open access: yesJournal of Statistical Planning and Inference, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Beirlant, J.   +2 more
openaire   +8 more sources

An Integrated Functional Weissman Estimator for Conditional Extreme Quantiles

open access: yesRevstat Statistical Journal, 2019
It is well-known that estimating extreme quantiles, namely, quantiles lying beyond the range of the available data, is a nontrivial problem that involves the analysis of tail behavior through the estimation of the extreme-value index.
Laurent Gardes , Gilles Stupfler
doaj   +1 more source

Application of Morphological Index in the Assesment of Type and Function of Fat Tail Sheep in Sapudi Island

open access: yesBiotropika: Journal of Tropical Biology, 2017
Morphological index could be used to evaluate type and function of livestock. The aim of this study was applying morphological index to assess the type and function of Sapudi fat tail sheep.
A. M Abdurrahman, Setiasih Setiasih
doaj   +1 more source

The Impact of industry's features on financial risk contagion of Companies Listed in Tehran Stock Exchange [PDF]

open access: yesمدلسازی اقتصادسنجی, 2020
The correlation between market movements and returns is an important issue in risk management and investment portfolio strategies. Investors who try to diversify their assets in regional markets pay special attention to communications between financial ...
Mohammad Ghadamyari   +1 more
doaj   +1 more source

Stochastic tail index model for high frequency financial data with Bayesian analysis

open access: yesJournal of Econometrics, 2018
This paper proposes a new dynamic model called Stochastic Tail Index (STI) model to analyze time-varying tail index for financial asset using high frequency return data.
Guangyu Mao, Zhengjun Zhang
semanticscholar   +1 more source

On posterior consistency of tail index for Bayesian kernel mixture models [PDF]

open access: yesBernoulli, 2015
Asymptotic theory of tail index estimation has been studied extensively in the frequentist literature on extreme values, but rarely in the Bayesian context.
Cheng Li, Lizhen Lin, D. Dunson
semanticscholar   +1 more source

Simple Approximations and Interpretation of Pareto Index and Gini Coefficient Using Mean Absolute Deviations and Quantile Functions

open access: yesEconometrics
The Pareto distribution has been widely used to model income distribution and inequality. The tail index and the Gini index are typically computed by iteration using Maximum Likelihood and are usually interpreted in terms of the Lorenz curve.
Eugene Pinsky, Qifu Wen
doaj   +1 more source

Estimation of the Tail Index of Pareto-Type Distributions Using Regularisation

open access: yesJournal of Mathematics, 2022
In this paper, we introduce reduced-bias estimators for the estimation of the tail index of Pareto-type distributions. This is achieved through the use of a regularised weighted least squares with an exponential regression model for log-spacings of top ...
E. Ocran   +3 more
doaj   +1 more source

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