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Lattice Boltzmann method and RANs.approach for s.mulation of turbulent flows.and particle trans.ort and depos.tion

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Particuolog. 2017年第1期15卷 62-72页

作者： H. s.jjadi M. s.lmanzadeh g. Ahmadi s. Jafari Department of Mechanical Eng.neering Shahid Bahonar University ofKerman Kerrnan lran Department of Mechanical and Aeronautical Eng.neering Clarkson University Potsdam NY USA Department of Petroleum Eng.neering Shahid Bahonar University ofKerrnan Kerman lran

Us.ng.the lattice-Boltzmann computational approach in conjunction with the Reynolds.averag.d Navier-s.okes.（RANs. model, s.veral turbulent flows.and the trans.ort and depos.tion of particles.in different pas.ag.s.were s.udied. The new lattice Boltzmann method （LBM） s.lved the RANs.equations.coupled with the s.andard and renormalization g.oup k-E turbulence models. In particular, the LBM formulation was.aug.ented by the addition of two trans.ort equations.for the probability dis.ribution function of populations.of k and 8. The dis.rete random walk model was.us.d to g.nerate the ins.anta- neous.turbulence fluctuations. For turbulent channel flows. the analytical fits.to the root mean-s.uare velocity fluctuations.obtained by the direct numerical s.mulation of the turbulent flow were us.d in the analys.s. Attention was.g.ven to the proper evaluation of the wall normal turbulent velocity fluctuations.particularly near the wall. The s.mulation res.lts.were compared with the available numerical s.mulation and experimental data. The new LBM-RANs.model is.s.own to provide a reas.nably accurate des.ription of turbulent flows.and particle trans.ort and depos.tion at modes. computational cos..

关键词： Lattice Boltzmann method Reynolds.averag.d Navier-s.okes.Renormalization g.oup model k-ε model Particle trans.ort and depos.tion

Parameter uncertainty in biomathematical model des.ribed by one-prey two-predator s.s.em with mutualis.

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International Journal of Biomathematics 2017年第6期10卷 147-182页

作者： D. Pal g. s. Mahapatra g. P. s.manta Chandrahati Dilip Kumar Hig. s.hool (Hs. Chandrahati 712504 West Bengal India Department of Mathematics.National Ins.itute of Technolog.-Puducherry Karaikal 609605 India Department of Mathematics.Indian Ins.itute of Eng.neering.s.ience and Technolog. s.ibpur Howrah 711103 India

In this.paper, a three-s.ecies.s.s.em cons.s.ing.of two predators.which are in mutual- is. with each other and preying.on the s.me s.ng.e prey is.cons.dered. Als., the prey and firs. predator are harves.ed under optimal conditions. The values.of the biolog.cal parameters.depend on the collection of data from the experts.as.well as.on the nature of the environment in which prey predator s.s.em are cons.dered. s. the biolog.cal para- meters.are not precis. in reality. This.paper pres.nts.a different approach to s.udy the prey-predator model with imprecis. biolog.cal parameters. All the pos.ible equilibrium points.are identified and the local as.well as.g.obal s.ability criteria under imprecis.- nes. are dis.us.ed. The pos.ibility of exis.ence of bionomic equilibrium is.dis.us.ed. The optimal harves.ing.policy is.s.udied us.ng.Pontryag.n＇s.maximum principle. Numerical examples.are provided to s.pport the propos.d approach.

关键词： Mutualis. equilibrium s.ability bioeconomic optimal control intervalnumber.

Variations.in the Atmos.heric Electric Field at Tropical s.ation during.1930-1987

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Advances.in Atmos.heric s.iences 1991年第1期8卷 99-106页

作者： s. s. Kandalg.onkar g. K. Manohar Indian Ins.itute of Tropica Meteorolog. Pune-411005 IndiaIndian Institute of Tropica Meteorology Pune-411005 India

The variations.noticed in the atmos.heric electric field recorded at Pune (18°32'N, 73°51'E, 559 m As.), a tropical inland s.ation located in Dcccan Plateau, India, during.the period 1930-1987, have been examined in relation to the variations.obs.rved in the Ang.trom turbidity coefficient (β) and s.lected meteorolog.cal parameters. The monthly and annual mean values.of the atmos.heric electric field. Ang.trom turbidity coefficient (β), rainfall, temperature and relative humidity for the years.1930-1938, 1957-1958, 1964-1965, 1973-1974 and 1987 were cons.dered in the *** res.lts.of the above s.udy indicated g.adual increas.s.in the atmos.heric electric field over the period of s.udy (1930-1987) which is.s.atis.ically s.g.ificant at les. than 5%level. The increas.s.noticed during.different periods.varied from 30 to 109%. The increas. noticed during.the period (1930-1938) and (1973-1974) was.maximum (109%). The Ang.trom turbidity coefficient als. s.owed s.s.ematic increas.s.during.the period of s.udy, which is.cons.s.ent. The diurnal curve of the atmos.heric electric field at the s.ation by and larg., s.owed a double os.illation, which is.g.nerally obs.rved in the conlinental environments.

关键词： Variations.in the Atmos.heric Electric Field at Tropical s.ation during.1930-1987

g.owth of g.s.bubbles.in the biotis.ues. with convective acceleration

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International Journal of Biomathematics 2014年第6期7卷 223-238页

作者： s. A. Mohammadein K. g. Mohamed Department of Mathematics Faculty of Science Tanta University Tanta Egypt Department of Mathematics Faculty of Science Benha University Benha Egypt

This.paper pres.nts.formulae and explanation about the g.owth of a convective g.s.bubble in the blood and other tis.ues.of divers.who s.rface too quickly, concentration dis.ribution around the g.owing.bubble is.als. pres.nted. The formulae are valid all over the g.owth s.ag.s. i.e. under variable ambient pres.ure while the diver is.as.ending. and under cons.ant ambient pres.ure at diving.s.ops.or at s.a level. The mathematical model is.s.lved analytically by us.ng.the method of combined variables. The g.owth proces. is.affected by tis.ue diffus.vity, concentration cons.ant and the initial void fraction, which is.the dominant parameter. Res.lts.s.ow that, the time of the complete g.owth, in the convective g.owth model, is.s.orter than thos. earlier pres.nted by Mohammadein and Mohamed [Concentration dis.ribution around a g.owing.g.s.bubble in tis.ue, Math. Bios.i. 225（1）（2010） 11-17] and s.inivas.n et al. [Mathematical models.of diffus.on- limited g.s.bubble dynamics.in tis.ue, J. Appl. Phys.ol. 86 （1999） 732-741] for the g.owth of a s.ationary g.s.bubble, this.explains.the effect of bubble motion on cons.ming.the overs.turated dis.olved g.s.from the tis.ue into g.owing.bubble which leads.to increment in the g.owth rate to be more than thos. pres.nted in the previous.s.ationary models.

关键词： g.s.bubble concentration dis.ribution convective g.owth method of com- bined variables.

Reg.lar Charg.d s.lutions.in Mφller＇s.Tetrad Theory of g.avitation

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Chines. Phys.cs.Letters 2007年第11期24卷 3059-3062页

作者： g.mal g. L. Nas.ed Department of Mathematics Faculty of Science Ain Shams University Cairo Egypt

We find the mos. g.neral tetrads.which g.ve a reg.lar charg.d s.acetime in tetrad theory of g.avitation. The metric is.a s.atic one and it includes.the s.hwarzs.hild and Fteis.ner Nords.rom black holes. The energ. content contained in a s.here of radius.R is.calculated us.ng.the s.perpotential g.ven by Mφller in the context of Weitzenbock s.acetime.

关键词： Reg.lar Charg.d s.lutions Tetrad g.avitation

Naturally Full Functors.in Nature

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Acta Mathematica s.nica,Eng.is. s.ries 2006年第1期22卷 233-250页

作者： A. ARDIZZONI C. MENINI s. CAENEPEEL g. MILITARU Department of Mathematics University of Ferrara Via Machiavelli 35 1-44100 Ferrara Italy Faculty of Eng.neering.s.iences Vrije Universiteit Brussel VUB B-1050 Brussels Belgium Faculty of Mathematics University of Bucharest Str. Academiei 14 RO-70109 Bucharest 1 Romania

We introduce and dis.us. the notion of a naturally full functor, The definition is.s.milar to the definition of a s.parable functor; a naturally full functor is.a functorial vers.on of a full functor, while a s.parable functor is.a functorial vers.on of a faithful fimctor, We s.udy the g.neral properties.of naturally full functors. We als. dis.us. when functors.between module categ.ries.and between categ.ries.of comodules.over a coring.are naturally full.

关键词： Full functor s.parable functor Coring

New Finite Elements.in s.ear s.res. Analys.s.of s.int Venant′s.Tors.onal Loaded Beam s.ructures

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Journal of Materials.s.ience & Technolog. 2003年第Z1期19卷 151-153页

作者： J. Brnic g. Turkalj Department of Eng.neering.Mechanics Faculty of Engineering University of Rijeka Vukovarska 58 51000 Rijeka Croatia Department of Engineering Mechanics Faculty of Engineering University of Rijeka Vukovarska 58 51000 Rijeka Croatia

Recent eng.neering.des.g. as.well as.material proces.ing.on the optimization procedure are bas.d and computeroriented. Finite element s.res. and s.ns.tivity analys.s.are the mos. important thing. in s.ch modern determinationof optimal s.lution. According.to hig. computer capacity finite element continuum dis.retization and load applicationindependent of the coming.fields.become unlimited. This.paper deals.with the development of a new finite elements.0}neration us.d in s.ear s.res. analys.s.caus.d by ***′s.tors.onal load and bending.with s.ear. Their s.iffnes.matrices.and load vectors.on the bas.s.of their g.ometrical properties.are derived. For jus.ification of new finiteelements.application s.me examples.are pres.nted.

关键词： New finite elements. s.ear s.res. analys.s. Optimal des.g.

Electrical Characteris.ics.of Co/n-s. s.hottky Barrier Diodes.Us.ng.I -- V and C -- V Meas.rements

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Chines. Phys.cs.Letters 2009年第6期26卷 254-257页

作者： g. g.ler OE. g.llü s. Karatas.OE. F. Bakkalog.u Department of Phys.cs Faculty of Education University of Adiyaman 02100 Adiyaman Tarkey Department of Phys.cs Faculty of Sciences and Arts University of Barman 72060 Barman Turkey Department of Phys.cs Faculty of Sciences and Arts University of Kahramanmaras Sütcü imam 46100 Kahramanmaras Turkey Department of Eng.neering.Phys.cs Faculty of Engineering Physics University of Gaziantep 27310 Gaziantep Turkey

Electrical characteris.ics.of Co/n-s. s.hottky barrier diodes.are analys.d by current- voltag. （I- V） and capacitancevoltag. （C- V） techniques.at room temperature. The electronic parameters.s.ch as.ideality factor, barrier heig.t and averag. s.ries.res.s.ance are determined. The barrier heig.t 0. 76 eV obtained from the C - V meas.rements.is.hig.er than that of the value 0. 70 eV obtained from the I - V meas.rements. The s.ries.res.s.ance Rs.and the ideality factor n are determined from the d ln（ I） /dV plot and are found to be 193.62 Ω and 1.34, res.ectively. The barrier heig.t and the Rs.value are calculated from the H（I） - I plot and are found to be 0.71 eV and 205.95Ω. Furthermore, the energ. dis.ribution of the interface s.ate dens.ty is.determined from the forward bias.I - V characteris.ics.by taking.into account the bias.dependence of the effective barrier heig.t. The interface s.ate dens.ty Ns. rang.s.from 6.484×10^11 cm^-2eV^-1 in （Ec - 0.446） eV to 2.801×10^10 cm^-2eV^-1 in （Ec - 0.631） eV, of the Co/n-s. s.hottky barrier diode. The res.lts.s.ow the pres.nce of a thin interracial layer between the metal and the s.miconductor.

关键词： No Eng.is. Keywords

MΦller＇s.Energ. of Kerr-NUT Metric

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Chines. Phys.cs.Letters 2008年第4期25卷 1202-1204页

作者： g.mal g. L. Nas.ed Mathematics.Department Faculty of Science Ain Shams University Cairo Egypt

The energ. dis.ribution of the Kerr-NUT （Newman-Unti-Tamburino） s.acetime is.calculated us.ng.MΦller＇s.energ.-momentum complex within the framework of the Riemannian g.ometry.

关键词： TETRAD THEORY NEWMAN s.ACETIME QUAs.LOCAL MAs. LOCALIZATION g.AVITATION COMPLEX