نتایج جستجو برای: coarse particle

تعداد نتایج: 203550  

2014
Matthew D Brace Elizabeth Stevens S Mark Taylor Sarah Butt Zhennan Sun Licai Hu Megan Borden Neeraj Khanna James Kuchta Jonathan Trites Robert Hart Mark D Gibson

Objectives: To measure changes in air quality during surgery. Methods: Operating room (OR) and hallway air quality was continuously monitored over a 3-month period. Rooftop monitoring was used to control for environmental changes and to account for the infiltration of outdoor air pollutants. Air quality measurements were correlated with operative times and electro-dissection equipment used. Res...

2011
Thorsten Prustel Martin Meier-Schellersheim

In recent years, several particle-based stochastic simulation algorithms (PSSA) have been developed to study the spatially resolved dynamics of biochemical networks at a molecular scale. A challenge all these approaches have to address is to allow for simulations at cell-biologically relevant timescales without neither neglecting important spatial and biochemical properties of the simulated sys...

1994
L. E. Oxman

We consider the generation of entropy when particle pairs are created at a cosmological level. Making a reduction via the particle number basis, we compute the classical limit for the entropy generation due to the evolution of the matter field fluctuations (squeeze transformation), obtaining that it is linear in the squeeze parameter for a general class of initial states. We also discuss the de...

2015
Stefan Bott Sabine Schulte im Walde

This article presents a distributional approach to predict the compositionality of German particle verbs by modelling changes in syntactic argument structure. We justify the experiments on theoretical grounds and employ GermaNet, Topic Models and Singular Value Decomposition for generalization, to compensate for data sparseness. Evaluating against three human-rated gold standards, our finegrain...

1999
Stefan Leupold

Based on a first order gradient expansion a consistent transport equation is derived for a nonrelativistic system beyond the quasiparticle approximation, i.e. for a regime where the dynamically generated width of the states is allowed to be large. An exactly conserved quantity is identified which is interpreted as an effective particle number obtained by coarse graining. Using a test particle a...

2005
Massimo Falcioni Luigi Palatella Simone Pigolotti Lamberto Rondoni Angelo Vulpiani

We introduce a high dimensional symplectic map, modeling a large system consisting of weakly interacting chaotic subsystems, as a toy model to analyze the interplay between single-particle chaotic dynamics and particles interactions in thermodynamic systems. We study the growth with time of the Boltzmann entropy, SB , in this system as a function of the coarse graining resolution. We show that ...

Journal: :The Journal of chemical physics 2009
Rudolf M Füchslin Harold Fellermann Anders Eriksson Hans-Joachim Ziock

Dissipative particle dynamics (DPD) is now a well-established method for simulating soft matter systems. However, its applicability was recently questioned because some investigations showed an upper coarse-graining limit that would prevent the applicability of the method to the whole mesoscopic range. This article aims to re-establish DPD as a truly mesoscopic method by analyzing the problems ...

The success of flotation operation depends upon the thriving interactions of chemical and physical variables. In this work, the effects of particle size, bubble size, and collector dosage on the bubble loading in a continuous flotation column were investigated. In other words, this work was mainly concerned with the evaluation of the true flotation response to the changes in the operating varia...

ژورنال: مواد پرانرژی 2012
عباسی, سعید, محمودی نژاد, محمود رضا ,

  In this paper the Cross-linked double base propellant (XLDB) based on polyurethanes comprised of polycaprolactone (PCP) as binder and ammonium perchlorate (AP) and RDX as solid oxidizer have been prepared and characterized. Propellant burning rate were determined by the strand burner method (Crawford bomb). In the AP-based composition, the energy is enhanced and the pressure exponent reduced ...

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