نتایج جستجو برای: microscopic emission models

تعداد نتایج: 1130091  

2007
Mark M. Millonas James Franck

We show how to construct detailed microscopic models of systems where only coarse grained kinetic data can be measured experimentally. This can be done in real time via the application of the methods of optimal control theory coupled to an adaptive algorithm based on simulated annealing. As an added bonus this method allows for precise control, and the system can essentially be placed into any ...

Journal: :SIAM Journal of Applied Mathematics 2008
Chun Liu Hailiang Liu

We consider the microscopic equation of FENE (finite extensible nonlinear elasticity) models for polymeric fluids under a steady flow field. This paper will show for the underlying Fokker-Planck type of equations, any pre-assigned distribution on boundary will become redundant once the non-dimensional number Li := Hb kBT ≥ 2, where H is the elasticity constant, √ b is the maximum dumbbell exten...

2015
Martin Bicher Niki Popper

In this paper we will not discuss different motivations and applications of microscopic models, but are presenting a technique to investigate the theoretical background of microscopic models. In context of our work we use the term microscopic model for dynamic (hereby used to indicate temporal dependent) models, consisting of a high number of similar sub-models, which will furthermore be denote...

Journal: :Acta Acustica united with Acustica 2011

Journal: :The Astrophysical Journal 2021

We present a comparative study of four physical dust models and two single-temperature modified blackbody by fitting them to the resolved WISE, Spitzer, Herschel photometry M101 (NGC 5457). Using identical data grid-based technique, we compare resulting radiation field properties derived from models. find that mass yielded different can vary up factor 3 (factor 1.4 between only), although fits ...

1999
Eric Brunet

Reaction-diffusion problems are often described at a macroscopic scale by partial derivative equations of the type of the Fisher or KolmogorovPetrovsky-Piscounov equation. These equations have a continuous family of front solutions, each of them corresponding to a different velocity of the front. By simulating systems of size up to N = 10 particles at the microscopic scale, where particles reac...

2002
Carsten Greiner

We give a reminder on the major inputs of microscopic hadronic transport models and on the physics aims when describing various aspects of relativistic heavy ion collisions at SPS energies. We then first stress that the situation of particle ratios being reproduced by a statistical description does not necessarily mean a clear hint for the existence of a fully isotropic momentum distribution at...

2003
M. M. Khaiyer J. Huang P. Minnis B. Lin

Satellites are useful for monitoring climatological parameters over large domains. They are especially useful for measuring various cloud microphysical and radiative parameters where ground-based instruments are not available. The geostationary operational environmental satellite (GOES) has been used to retrieve cloud and radiative properties over an extended domain centered on the Atmospheric ...

A. Shirneshan B. Ghobadian Gh. Najafi M. Almassi

Nowadays biodiesel is receiving more attention as a most important renewable energy for using in diesel engines. Inthis research, the application of Response Surface Methodology (RSM) was highlighted to investigate the effects of biodiesel-diesel blends (B0, B20, B50 and B100), engine operating parameters (engine load and  speed) on CO2 emission of a diesel engine. The experiments were conducte...

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