نتایج جستجو برای: flow efficiency

تعداد نتایج: 848435  

Journal: :Journal of chromatography. A 2010
Ji Yeon Ahn Ki Hun Kim Ju Yong Lee P Stephen Williams Myeong Hee Moon

The separation efficiencies of three different asymmetrical flow field-flow fractionation (AF4) channel designs were evaluated using polystyrene latex standards. Channel breadth was held constant for one channel (rectangular profile), and was reduced either linearly (trapezoidal profile) or exponentially (exponential profile) along the length for the other two. The effective void volumes of the...

2002
Takako Fujiwara-Greve

We investigate the range of payoffs which are achieved by voluntary and repeatable partnerships under no information flow. In each period, players without a partner are randomly matched and have an option to form a partnership on meeting a new opponent. A partnership forms and continues only by mutual agreement. Actions are observed only by partners and a player starts with a null history once ...

2005
Xinwu Cao

The radiative efficiencies of accretion flows become significantly lower than that of standard thin disks, if they are accreting at rates lower than a critical accretion rate ṁcrit. The transition of a standard thin disk to a radiatively inefficient accretion flow (RIAF) is expected to occur, while ṁ ∼ ṁcrit (ṁ = Ṁ/ṀEdd). We simulate the distributions of Eddington ratio λL B λ/LEdd for active g...

2009
Anupama Sen Tooraj Jamasb

As developing countries seek to improve their economic prospects, electricity reform has been widely viewed as a central part of this effort. While the focus of most research to date has been at economy or utility level; there has been much less research on regional outcomes. India presents a unique case, as its states share a common economic and political system, whilst having been given consi...

2015
Ed Nosal Guillaume Rocheteau

We construct a search-theoretic model where fiat money coexists with real assets, and all assets can be used as a media of exchange. The terms of trade in bilateral matches are determined by a pairwise Pareto-efficient pricing mechanism. We do not have to appeal to exogenous liquidity constraints to generate asset prices that are consistent with the following facts: (i) fiat money can be valued...

2012
Satyender Singh Prashant Dhiman

In this paper double flow packed bed solar air heater has been investigated theoretically. The effect of air mass flow rate, porosity and different depth ratios at study state conditions on the thermal performance of a double flow packed bed solar air heater is found by using the alternative simulation system. Comparisons between the measured thermal and effective thermal efficiency of the doub...

2015
Alan J. Meese

This Article critiques the role that the partial equilibrium trade-off paradigm plays in the debate over the definition of " consumer welfare " that courts should employ when developing and applying antitrust doctrine. The Article contends that common reliance on the paradigm distorts the debate between those who would equate " consumer welfare " with " total welfare " and those who equate cons...

2001
J. N. Hagstrom R. A. Abrams

We generalize Braess’s paradoxical example by defining a Braess Paradox to occur when the Wardrop equilibrium distribution of traffic flows is not strongly Pareto optimal. We characterize a Braess Paradox in terms of the solution to a mathematical program. Examples illustrate unexpected properties of these solutions. We discuss a computational approach to detecting a Braess Paradox. Keywords— M...

1998
José A. Pons José A. Font José Ma Juan A. Miralles Jose A. Pons

We present a general and practical procedure to solve the general relativistic hydrodynamic equations by using any of the special relativistic Riemann solvers recently developed for describing the evolution of special relativistic flows. Our proposal relies on a local change of coordinates in terms of which the spacetime metric is locally Minkowskian and permits accurate numerical calculations ...

2004
Edie Miglio Simona Perotto Fausto Saleri

This work is the first step towards a multiphysics strategy for freesurface flows simulation. In particular, we present a strategy to couple one and two-dimensional hydrostatic free surface flow models. We aim to reduce the computational cost required by a full 2D model. After introducing the two models along with suitable a priori error estimates, we discuss the choice of convenient matching c...

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