A Fuzzy Framework for Realized Volatility Prediction: Empirical Evidence From Equity Markets
Journal of Forecasting, EarlyView.ABSTRACT This study introduces a realized volatility fuzzy time series (RV‐FTS) model that applies a fuzzy c‐means clustering algorithm to estimate time‐varying c$$ c $$ latent volatility states and their corresponding membership degrees. These memberships are used to construct a fuzzified volatility estimate as a weighted average of cluster centroids.
Shafqat Iqbal, Štefan Lyócsa
wiley +1 more source
Turbulent compressible axisymmetric flows computation with the K-Epsilon model
, 1992 A new technique is proposed to compute axisymmetric flows. Turbulence modelling is done with a k-e model for high Reynolds number regions and a k-L one-equation model for near-wall regions. Moreover, a new robust algorithm for the turbulent equations is presented.
Mohammadi, Bijan, Saiac, J.H.
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A generalized k-epsilon model for turbulence modulation in fluid-particle flows [PDF]
, 2022 R. Skartlien +2 more
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A two-dimensional numerical study of the flow inside the combustion chambers of a motored rotary engine [PDF]
A numerical study was performed to investigate the unsteady, multidimensional flow inside the combustion chambers of an idealized, two-dimensional, rotary engine under motored conditions.
Schock, H. J. +2 more
core +1 more source
Downdraft Devices for Negative Emissions—Quantification Study and Environmental Implication
Greenhouse Gases: Science and Technology, EarlyView.ABSTRACT Methane (CH4) is a potent greenhouse gas with a global warming potential far exceeding that of CO2 over short time horizons. Its removal from the atmosphere remains challenging due to its low ambient concentration and chemical stability. This study explores downdraft energy towers (DETs) as an innovative CH4 mitigation technology that enhances
Xiaokun Yao +4 more
wiley +1 more source
Implementation and validation of the Chien k-epsilon turbulence model in the WIND Navier-Stokes code [PDF]
, 1999 Dennis A. Yoder, Nicholas J. Georgiadis
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Confined swirling jet predictions using a multiple-scale turbulence model [PDF]
A recently developed multiple scale turbulence model is used for the numerical prediction of isothermal, confined turbulent swirling flows. Because of the streamline curvature and nonequilibrium spectral energy transfer nature of the swirling flow, the ...
Chen, C. P.
core +1 more source
Experimental Factors and Techniques for Pool Boiling Heat Transfer Enhancement: A Critical Review
Heat Transfer, EarlyView.ABSTRACT This review presents a comprehensive assessment of active strategies for enhancing pool boiling heat transfer, with a focus on techniques that do not rely solely on the boiling surface modification. It examines a broad range of methodologies including fluid additives, external fields, mechanical interventions, and thermal‐geometric tuning that
José E. Pereira +2 more
wiley +1 more source
AviationTheoretical research on hydraulic processes occurring in aircraft hydraulic drives is presented in the studies. Installation of angular fitting connections in aircraft pipeline systems influences hydrodynamic processes and fluid flow characteristics ...
Mykola Karpenko
doaj +1 more source
Numerical Simulation of Cooling Plate Using K-Epsilon Turbulence Model to Cool Down Large-Sized Graphite/LiFePO4 Battery at High C-Rates [PDF]
, 2022 Satyam Panchal +6 more
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