نتایج جستجو برای: roe flux splitting

تعداد نتایج: 125477  

Journal: :Oryx 1955

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم اجتماعی و اقتصادی 1388

در این مطالعه رابطه بین تمرکز مالکیت، عملکرد شرکت و سیاست تقسیم سود در شرکتهای پذیرفته شده در بورس اوراق بهادار تهران بررسی شده است. از این رو تعداد 64 شرکت در طی دوره 1380 تا 1385 بررسی گردیدند. رویکرد انتخابی برای آزمون فرضیات با استفاده از تلفیق داده های مقطعی و زمانی می باشد. در این تحقیق از روش رگرسیون حداقل مربعات ادغام شده (پانل دیتا) استفاده شده است. تمرکز مالکیت با استفاده از درصد مالک...

2010
Zahida Batool Jeff Hosea Stephen J. Sweeney

The III-bismides are considered to be a very attractive set of III-V alloys due to their potential applications in photonic and spintronic devices. The incorporation of bismuth into GaAs, with its band anti-crossing effect in the valence band of GaAs, leads to a decrease in the temperature dependence of the bandgap. Such a material may be very useful in designing temperature-insensitive semicon...

2014
K. Oßwald A. Siegmund P. Birken V. Hannemann A. Meister

A modification of the Roe scheme aimed at low Mach number flows is discussed. It improves the dissipation of kinetic energy at the highest resolved wave numbers in a low Mach number test case of decaying isotropic turbulence. This is done by scaling the jumps in all discrete velocity components within the numerical flux function. An asymptotic analysis is used to show the correct pressure scali...

2018
Jan Demesko Janusz Markowski Mirosława Słaba Janusz Hejduk Piotr Minias

Game animals, such as the roe deer (Capreolus capreolus), have long been used as bioindicators of environmental contamination. Most ecotoxicological research on ungulates has focused on trace element content in soft tissues and antlers. Also, only fragmentary information exists about whether and how trace element concentrations vary with the age of wild-living animals and whether these age-rela...

2018
Laura A Forney Natalie R Lenard Laura K Stewart Tara M Henagan

Chronic inflammation in adipose tissue may contribute to depot-specific adipose tissue expansion, leading to obesity and insulin resistance. Dietary supplementation with quercetin or botanical extracts containing quercetin attenuates high fat diet (HFD)-induced obesity and insulin resistance and decreases inflammation. Here, we determined the effects of quercetin and red onion extract (ROE) con...

1997
Glenn J. Veeder Dennis L. Matson Torrence V. Johnson Diana L. Blaney

We report the following results from a decade of infrared radiometry of Io: (1) The average global heat flow is more than -2.5 W rn”z, (2) large warm (s200 K) volcanic regions dominate the global heat flow, (3) small high-temperature (> 300 K) “hotspots” contribute little to the average heat flow, (4) thermal anomalies on the leading hemisphere contribute about half of the heat flow, (5) a subs...

2014
Laslo T. Diosady Scott M. Murman

This work uses a higher-order discontinuous-Galerkin finite-element method to solve the compressible Navier-Stokes equations [1,2]. The unsteady Navier-Stokes equations are discretized using a non-linearly stable space-time entropyvariable formulation. The inviscid flux is computed using the approximate Riemann solver of Ismail and Roe [3]. The viscous fluxes are computed using an interior pena...

2005
M. Fortin A. Serghini Mounim

We study the relationship between finite volume and mixed finite element methods for the the hyperbolic conservation laws, and the closely related convection-diffusion equations.A general framework is proposed for the derivation and a functional framework is developed which could allow the analysis of relating finite volume (FV) schemes. We show via two nonstandard formulations, that numerous F...

2009
M. J. Castro Díaz E. D. Fernández-Nieto A. M. Ferreiro C. Parés

In this paper we study the numerical approximation of bedload sediment transport due to shallow layer flows. The hydrodynamical component is modeled by a 2D shallow water system and the morphodynamical component by a solid transport discharge formula that depends on the hydrodynamical variables. The coupled system can be written as a nonconservative hyperbolic system. To discretize it, first we...

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