نتایج جستجو برای: by using bubble size distribution

تعداد نتایج: 8967811  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم پایه 1389

abstract in this thesis at first we comput the determinant of hankel matrix with enteries a_k (x)=?_(m=0)^k??((2k+2-m)¦(k-m)) x^m ? by using a new operator, ? and by writing and solving differential equation of order two at points x=2 and x=-2 . also we show that this determinant under k-binomial transformation is invariant.

ژورنال: میراث ایران 2019
Bitaraf, Atousa, Salimi Moayed, Salim,

Hubble-bubble has been the most common device for smoking tobacco in Iran and its neighboring. It has a folkloric name in every region. Hubble-bubble consists of a glass pitcher or pottery at the bottom, a wooden body in the middle, a wooden or plastic tube attached to the body for puffing, and a censer at the top to put tobacco and charcoal. Puffing causes the charcoal to catch fire and the to...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Rizal F Hariadi Erik Winfree Bernard Yurke

Quantifying the mechanical forces produced by fluid flows within the ocean is critical to understanding the ocean's environmental phenomena. Such forces may have been instrumental in the origin of life by driving a primitive form of self-replication through fragmentation. Among the intense sources of hydrodynamic shear encountered in the ocean are breaking waves and the bursting bubbles produce...

2004
D. Kuzmin S. Turek

A dynamic Euler-Euler model for gas-liquid flows subject to mass transfer and simultaneous chemical reaction is assembled. The bubble size distribution is computed from an equation governing the evolution of average bubble mass. Highperformance finite element tools for numerical solution of the problem at hand are discussed. Computational results for the chemisorption of CO2 into NaOH shed some...

Journal: :international journal of nanoscience and nanotechnology 2013
r. ahmadi a. khodadadi darban

in this paper, size distribution of nano-bubbles was measured by the reliable and fast method of laserdiffraction technique. nano-bubbles were produced using a nano-bubble generator designed and madebased on hydrodynamic cavitation phenomenon in venturi tubes. a central composite design withresponse surface methodology was used to conduct a five factor, five level factorial experimental designo...

2002

The derivation of effective equations for pressure wave propagation in a bubbly fluid at very low void fractions is examined. A Vlasov-type equation is derived for the probability distribution of the bubbles in phase space instead of computing effective equations in terms of averaged quantities. This provides a more general description of the bubble mixture and contains previously derived effec...

2002
Peter Smereka

The derivation of eeective equations for pressure wave propagation in a bubbly uid at very low void fractions is examined. A Vlasov-type equation is derived for the probability distribution of the bubbles in phase space instead of computing eeective equations in terms of averaged quantities. This provides a more general description of the bubble mixture and contains previously derived eeective ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران 1388

target tracking is the tracking of an object in an image sequence. target tracking in image sequence consists of two different parts: 1- moving target detection 2- tracking of moving target. in some of the tracking algorithms these two parts are combined as a single algorithm. the main goal in this thesis is to provide a new framework for effective tracking of different kinds of moving target...

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