Features of the near-limit diffusion burning of PMMA

1985 ◽  
Vol 21 (3) ◽  
pp. 285-287
Author(s):  
V. I. Eremin ◽  
V. M. Nikolaev
Keyword(s):  
Diffusion Burning ◽  
Limit Diffusion

Diffusion burning of a liquid-fuel drop in a two-oxidizer mixture

1970 ◽  
Vol 6 (2) ◽  
pp. 218-220 ◽  
Author(s):  
M. A. Gurevich ◽  
A. M. Stepanov
Keyword(s):  
Liquid Fuel ◽  
Diffusion Burning

Convergence to a diffusion of a multi-allelic model in population genetics

1978 ◽  
Vol 10 (03) ◽  
pp. 538-562 ◽  
Author(s):  
Ken-Iti Sato
Keyword(s):  
Population Genetics ◽  
Markov Chain ◽  
Random Sampling ◽  
Lattice Points ◽  
Degenerate Diffusion ◽  
One Step ◽  
Step Transition ◽  
Two Stages ◽  
Allelic Model ◽  
Limit Diffusion

We consider a Markov chain on thed-dimensional (d-allelî) non-negative lattice points with the sum of components beingN,for which one-step transition consists of two stages—independent reproduction and random sampling. Convergence to a degenerate diffusion process whenN→ ∞ is proved. We show how difference among alleles in means and variances of offspring numbers affects the limit diffusion, giving a rigorous multi-allelic version of a result of Gillespie.

The Smoluchowski–Kramers approximation for the stochastic Liénard equation by mean-field

1991 ◽  
Vol 23 (2) ◽  
pp. 303-316 ◽  
Author(s):  
Kiyomasa Narita
Keyword(s):  
Differential Equation ◽  
Stochastic Differential Equation ◽  
Diffusion Process ◽  
Langevin Equation ◽  
Mean Field ◽  
Two Dimensional ◽  
Large Parameter ◽  
Rigorous Evaluation ◽  
One Dimensional ◽  
Limit Diffusion

The oscillator of the Liénard type with mean-field containing a large parameter α < 0 is considered. The solution of the two-dimensional stochastic differential equation with mean-field of the McKean type is taken as the response of the oscillator. By a rigorous evaluation of the upper bound of the displacement process depending on the parameter α, a one-dimensional limit diffusion process as α → ∞is derived and identified. Then our result extends the Smoluchowski–Kramers approximation for the Langevin equation without mean-field to the McKean equation with mean-field.

On the Premixed Combustion in a Direct-Injection Diesel Engine

1987 ◽  
Vol 109 (2) ◽  
pp. 187-192 ◽  
Author(s):  
A. C. Alkidas
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Engine Speed ◽  
Direct Injection ◽  
Premixed Combustion ◽  
Injection Timing ◽  
Oxides Of Nitrogen ◽  
Nitrogen Emissions ◽  
Direct Injection Diesel Engine ◽  
Diffusion Burning

The factors influencing premixed burning and the importance of premixed burning on the exhaust emissions from a small high-speed direct-injection diesel engine were investigated. The characteristics of premixed and diffusion burning were examined using a single-zone heat-release analysis. The mass of fuel burned in premixed combustion was found to be linearly related to the product of engine speed and ignition-delay time and to be essentially independent of the total amount of fuel injected. Accordingly, the premixed-burned fraction increased with increasing engine speed, with decreasing fuel-air ratio and with retarding injection timing. The hydrocarbon emissions did not correlate well with the premixed-burned fraction. In contrast, the oxides of nitrogen emissions were found to increase with decreasing premixed-burned fraction, indicating that diffusion burning, and not premixed burning, is the primary source of oxides of nitrogen emissions.

The multiclass GI/PH/N queue in the Halfin-Whitt regime

2000 ◽  
Vol 32 (02) ◽  
pp. 564-595 ◽  
Author(s):  
A. A. Puhalskii ◽  
M. I. Reiman
Keyword(s):  
Queue Length ◽  
Time Distribution ◽  
Heavy Traffic ◽  
Service Time Distribution ◽  
Time Process ◽  
Dimensional Diffusion ◽  
Phase Type ◽  
Waiting Time Process ◽  
Multiple Customer Classes ◽  
Limit Diffusion

We consider a multiserver queue in the heavy-traffic regime introduced and studied by Halfin and Whitt who investigated the case of a single customer class with exponentially distributed service times. Our purpose is to extend their analysis to a system with multiple customer classes, priorities, and phase-type service distributions. We prove a weak convergence limit theorem showing that a properly defined and normalized queue length process converges to a particular K-dimensional diffusion process, where K is the number of phases in the service time distribution. We also show that a properly normalized waiting time process converges to a simple functional of the limit diffusion for the queue length.

scholarly journals Why Natural or Electron Irradiated Sheep Wool Show Anomalous Sorption of Higher Concentrations of Copper(II)

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3180 ◽  
Author(s):  
Mária Porubská ◽  
Angela Kleinová ◽  
Peter Hybler ◽  
Jana Braniša
Keyword(s):  
Electron Beam ◽  
Sorption Isotherms ◽  
Fibre Surface ◽  
Ftir Spectra ◽  
Absorbed Doses ◽  
Complex Salts ◽  
Higher Doses ◽  
Limit Diffusion ◽  
Sheep Wool

Sorption of higher concentrations of Cu(II) solution onto natural sheep wool or wool irradiated by an electron beam was studied. Sorption isotherms were of unexpected character, showing extremes. The samples with lower absorbed doses adsorbed less than non-irradiated wool, while higher doses led to increased sorption varying with both concentration and dose. FTIR spectra taken from the fibre surface and bulk were different. It was concluded that there was formation of Cu(II)-complexes of carboxylic and cysteic acids with ligands coming from various keratin macromolecules. Clusters of chains crosslinked through the ligands on the surface limit diffusion of Cu(II) into the bulk of fibre, thus decreasing the sorption. After exhausting the available ligands on the surface the remaining Cu(II) cations diffuse into the keratin bulk. Here, depending on accessibility of suitable ligands, Cu(II) creates simple or complex salts giving rise to the sorption extremes. Suggestion of a mechanism for this phenomenon is presented.

scholarly journals Size Sensitive Transport Behavior of Liquid Metallic Mixtures

2015 ◽  
Vol 20 (2) ◽  
pp. 140-144
Author(s):  
Bhrigunandan Prasad Singh ◽  
Ishwar Koirala
Keyword(s):  
Size Effect ◽  
Transport Properties ◽  
Diffusion Coefficients ◽  
Liquid Alloys ◽  
Long Wavelength ◽  
Binary Liquid ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing ◽  
Gibb’S Free Energy ◽  
Limit Diffusion

We have used a formalism that connects thermodynamic and transport properties. The formalism has been used to calculate the Gibb’s free energy of mixing, concentration fluctuations in the long wavelength limit, diffusion coefficients and viscosity in Cu-Tl, Cu-Pb and Sn-Tl binary liquid alloys at 1573K, 1473K and 723K respectively with aid of size effect and no size effect. Our calculations show that appreciable size ratio has more effects on the transport properties as compared to thermodynamic properties of homo-coordinated liquid alloys Cu-Tl, Cu-Pb and Sn-Tl.Journal of Institute of Science and Technology, 2015, 20(2): 140-144  

scholarly journals Ruffles limit diffusion in the plasma membrane during macropinosome formation

2011 ◽  
Vol 124 (23) ◽  
pp. 4106-4114 ◽  
Author(s):  
T. P. Welliver ◽  
S. L. Chang ◽  
J. J. Linderman ◽  
J. A. Swanson
Keyword(s):  
Plasma Membrane ◽  
Limit Diffusion
Sign in / Sign up

Export Citation Format

Share Document