نتایج جستجو برای: ergun equation

تعداد نتایج: 229771  

Journal: :Rupkatha Journal on Interdisciplinary Studies in Humanities 2022

Currently, there are hardly any works that explicitly claim the political title “feminist” or “activist” while fully exploring feminist translation. Without necessarily embracing and recognizing transgressive reactionary processes of translation in movements activisms, existing collections generally explore “connections between gender women translation” (p. 2). This essay collection suggests im...

2017
David Holzmüller

The Restricted Shortest Path (RSP) problem, also known as the Delay-Constrained Least-Cost (DCLC) problem, is an NP-hard bicriteria optimization problem on graphs with n vertices and m edges. In a graph where each edge is assigned a cost and a delay, the goal is to find a min-cost path which does not exceed a delay bound. In this paper, we present improved approximation schemes for RSP on sever...

2003
E. A. Moreira J. R. Coury

Ceramic foams are a new structural material, characterized by a high porosity and a large surface area and made of megapores interconnected by filaments. This results in a structure with low resistance to fluid flow, making them appropriate for use as a filter. This work studies the influence of several structural parameters, such as porosity, tortuosity, surface area and pore diameter, in pred...

An increase in the flow velocity in flowthrough large porous media and deflection of flow regime from Darcy law causes a nonlinear relationship between hydraulic gradient and pore velocity of media. So many investigations have done previously in such Medias. One of the most important subjects in flowthrough large porous media is relationship between friction coefficient and flow characteristics...

Journal: : 2021

Purpose. To establish analytical dependences for calculating the characteristics of ash suspension and velocity constrained settling coal quartz depending on particle size density medium, which is necessary design determining operating modes hydraulic devices extracting from water mineral fly thermal power plants. Methodology. The research was carried out basis a cellular model classical concep...

The main objective of this research is stability determination of activated carbon adsorbent at fixed bed adsorption column for desulfurization of diesel fuel by mathematical modeling. This model is based on mass balances. Equations that are the outcome of mass balances are known as the second degree of partial differential equations, and they must be solved together simultaneously...

Journal: :Math. Oper. Res. 1992
Refael Hassin

The Restricted Shortest Path (RSP) problem, also known as the Delay-Constrained Least-Cost (DCLC) problem, is an NP-hard bicriteria optimization problem on graphs with n vertices and m edges. In a graph where each edge is assigned a cost and a delay, the goal is to find a min-cost path which does not exceed a delay bound. In this paper, we present improved approximation schemes for RSP on sever...

Journal: :Mathematical biosciences and engineering : MBE 2011
Heinz Schättler Urszula Ledzewicz Benjamin Cardwell

We describe optimal protocols for a class of mathematical models for tumor anti-angiogenesis for the problem of minimizing the tumor volume with an a priori given amount of vessel disruptive agents. The family of models is based on a biologically validated model by Hahnfeldt et al. and includes a modification by Ergun et al, but also provides two new variations that interpolate the dynamics for...

2007
L. Cesari

1. The statement of the problem. Let B denote the boundary of a smooth, closed and bounded surface in £ , and V the exterior of B. Erect a spherical polar coordinate system with origin interior to B; and denote by r a point (r, 0, ) in V and by TB a point (r#, 6B, 4>B) on B. Further let v be a scalar wave function for the exterior V, i.e., (a) v(r) is of class C, r £ 7 = VVJB, (b) ( V 2 +^ 2...

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