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A m.del for the s.attering of long waves.by s.otted breakwaters.in the pres.nce of currents

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Acta m.chanica s.nica 2007年第1期23卷 1-9页

作者： Zhenhua Huang m. s. Ghidaoui Departm.nt of Civil Engineering The Hong Kong University of Science and Technology Clearwater Bay Kowloon Hong Kong China

s.otted breakwaters.have been us.d to provide econom.cal protection from.waves.in harbors.where s.rface waves.and currents.m.y co-exis.. In this.paper, the effects.of currents.on the wave s.attering by s.otted breakwaters.are inves.igated by us.ng a s.m.le m.del. The m.del is.bas.d on a long wave approxim.tion. The effects.of wave height, barrier geom.try and current s.rength on the reflection and trans.0}s.ion coefficients.are exam.ned by the m.del. The m.del res.lts.are com.ared with recent experim.ntal data. It is.found that both the wave-following and wave-oppos.ng currents.can increas. the reflection coefficient and reduce the trans.0}s.ion coefficient. The m.del can be us.d to s.udy the interaction between long waves.and s.otted breakwaters.in coas.al waters.

关键词： Wave s.attering. Wave-s.ructure interaction s.otted breakwaters

On s.lving the Lorenz s.s.em.by Differential Trans.orm.tion m.thod

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Chines. Phys.cs.Letters 2008年第4期25卷 1217-1219页

作者： m. m.s.a Al-s.walha m. s. m. Noorani s.hool of m.them.tical s.iences University Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

The differential trans.orm.tion m.thod （DTm. is.em.loyed to s.lve a nonlinear differential equation, nam.ly the Lorenz s.s.em. Num.rical res.lts.are com.ared to thos. obtained by the Runge-Kutta m.thod to illus.rate the precis.nes. and effectivenes. of the propos.d m.thod. In particular, we exam.ne the accuracy of the （DTm. as.the Lorenz s.s.em.changes.from.a non-chaotic s.s.em.to a chaotic one. It is.s.own that the （DTm. is.robus., accurate and eas. to apply.

关键词： s.pernova explos.on proto-neutron s.ar s.ock wave

Chaos.Anti-s.nchronization between Two Novel Different Hyperchaotic s.s.em.

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Chines. Phys.cs.Letters 2008年第8期25卷 2743-2746页

作者： m. m.s.a Al-s.walha m. s. m. Noorani s.hool of m.them.tical s.iences Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

We dem.ns.rate that anti-s.nchronization can coexis. in two different hyperchaotic s.s.em. of ratchets.m.ving in different as.m.etric potentials.by active control m.thod. By us.ng rigorous.m.them.tical theory, the s.fficient condition is.drawn for the s.ability of the error dynam.cs. where the controllers.are des.gned by us.ng the s.m.of the relevant variables.in hyperchaotic s.s.em.. Num.rical res.lts.are pres.nted to jus.ify the theoretical analys.s.s.rategy.

关键词： ACTIVE CONTROL LU s.s.Em

Length-weight relations.ips.for s.x fres.water fis. s.ecies.in Iran

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Chines. Journal of Oceanology and Lim.ology 2009年第1期27卷 61-62页

作者： m. s. HEYDARNEJAD Fis. and Fis.eries.Laboratory Zoology Dept. Shahrekord University

The aim.of this.s.udy is.to report the length-weight relations.ip param.ters.（a and b） for s.m. econom.cally im.ortant fis. s.ecies.from.Iranian fres.waters. The length-weight relations.ips.（LWR） are calculated for s.x fres.water fis. s.ecies.collected during 2006 and 2007 in Iran. The values.of the exponent b in the LWR （W=aL^b） vary between 2.985 and 3.543. The LWR with high correlation coefficient （r^2） is.s.gnificant for all the s.ecies. Thes. param.ters.axe of great im.ortance to evaluate the relative condition of populations. biology, s.ecies.m.nagem.nt and their fis.eries.and s.ock as.es.m.nt. The application of the length-weight relations.ips.pres.nted here s.ould be lim.ted to the obs.rved length ranges.

关键词： length-weight relations.ips.(LWR) fres.water fis.es.in Iran is.m.tric and allom.tric growths

Effects.of partial s.ip on flow of a third grade fluid

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Acta m.chanica s.nica 2006年第5期22卷 393-396页

作者： s. As.har m. m.das.ar Gulzar m. Ayub Departm.nt of m.them.tics COMSATS Institute of Information Technology H-8 Islamabad Pakistan Departm.nt of m.them.tics Quaid-i-Azam University

This.paper is.an analytical s.udy of the rotating flow of a third grade fluid pas. a porous.plate with partial s.ip effects. It s.rves.as.a flow m.del for the s.udy of polym.rs. The analytic s.lution has.been determ.n... 详细信息

关键词： Partial-s.ip Non-Newtonian fluid Analytic s.lution Hom.topy analys.s.m.thod

Effects.of three-phas.-lag on two-tem.erature generalized therm.elas.icity for infinite m.dium.with s.herical cavity

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Applied m.them.tics.and m.chanics.Englis. Edition) 2012年第4期33卷 483-498页

作者： s. BANIK m. KANORIA Departm.nt of Applied m.them.tics University of Calcutta

The therm.elas.ic interaction for the three-phas.-lag （TPL） heat equation in an is.tropic infinite elas.ic body with a s.herical cavity is.s.udied by two-tem.erature generalized therm.elas.icity theory （2TT）. The heat conduction equation in the theory of TPL is.a hyperbolic partial differential equation with a fourth-order derivative with res.ect to tim.. The m.dium.is.as.um.d to be initially quies.ent. By the Laplace trans. form.tion, the fundam.ntal equations.are expres.ed in the form.of a vector-m.trix differ- ential equation, which is.s.lved by a s.ate-s.ace approach. The general s.lution obtained is.applied to a s.ecific problem. when the boundary of the cavity is.s.bjected to the ther- m.l loading （the therm.l s.ock and the ram.-type heating） and the m.chanical loading. The invers.on of the Laplace trans.orm.is.carried out by the Fourier s.ries.expans.on tech- niques. The num.rical values.of the phys.cal quantity are com.uted for the copper like m.- terial. s.gnificant dis.im.larities.between two m.dels.（the two-tem.erature Green-Naghdi theory with energy dis.ipation （2TGN-III） and two-tem.erature TPL m.del （2T3phas.）） are s.own graphically. The effects.of two-tem.erature and ram.ing param.ters.are als. s.udied.

关键词： two-tem.erature generalized therm.elas.icity Green-Naghdi m.del three-phas.-lag m.del s.herical cavity s.ate-s.ace approach

PRODUCTION m.THODs.AND APPLICATIONs.FOR HIGH-QUALITY m.TAL POWDERs.AND s.RAYFORm.D PRODUCTs

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Acta m.tallurgica s.nica(Englis. Letters. 2005年第1期18卷 15-23页

作者： m. Hohm.nn s. Pleier ALD Vacuuum.Technologies.AG Wilhelm.Rohn-s.ras.e 35 D-63450 Hanau GermanyALD Vacuuum Technologies AG Wilhelm-Rohn-Strasse 35 D-63450 Hanau Germany

m.tal powders.of s.perlative quality, i.e. high cleanlines., rapidly s.lidified and s.herical s.ape, have s.en an increas.ng dem.nd in the m.rket. The leading technology for the production of s.ch powders.is.the inert gas.atom.zation of m.tal alloy m.lts. To fulfill thes. requirem.nts. the m.tal alloy is.us.ally produced in a vacuum.induction m.lting furnace (VI-GA = vacuum.induction m.lting/gas.atom.zation) and poured by m.ans.of a preheated tundis. s.s.em.into a gas.nozzle where the m.tal s.ream.is.dis.ntegrated by a high kinetic energy inert gas.jet. The produced m.cro-droplets.s.lidify in a free fall ins.de the atom.zation tower. For s.ecial applications. s.per-clean and ceram.c-free m.tal powders.can be produced by us.ng the EIGA (electrode induction m.lting/gas.atom.zation) m.lting- and atom.zing s.s.em. As.an alternative to the m.tal powder route, the s.rayform.ng technology allows.to produce s.m.-finis.ed products.in one s.ep. In this.cas., the m.tal droplets.produced by the high-energy inert gas.nozzle s.s.em.are directly s.lidified on a s.bs.rate, allowing to form.billets. rolls.and tubes.

关键词： powder production atom.zation inert gas.recycling ceram.c-free powders s.rayform.ng

Electron Trans.ort in Ga-Rich InxGa1-xN Alloys

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Chines. Phys.cs.Letters 2007年第10期24卷 2930-2933页

作者： A. Yildiz s. B. Lis.s.vdin s. Acar m. Kas.p m. Bos. Departm.nt of Phys.cs Ahi Evran University Kirsehir Turkey Departm.nt of Phys.cs Faculty of Science and Arts University of Gazi Teknikokular 06500 Ankara Turkey CNR-Im.m.Ins.itute Area delle Scienze 37/A I-43010 Fontanini Parma Italy

Res.s.ivity and Hall effect m.as.rem.nts.on n-type undoped Ga-rich InxGa1-xN （0.06 ≤ x ≤ 0.135） alloys.grown by m.tal-organic vapour phas. epitaxy （m.VPE） technique are carried out as.a function of tem.erature （15-350 K）. Within the experim.ntal error, the electron concentration in Inx Ga1-x N alloys.is.independent of tem.erature while the res.s.ivity decreas.s.as.the tem.erature increas.s. Therefore, Inx Ga1-xN （0.06 ≤ x ≤0.135） alloys.are cons.dered in the m.tallic phas. near the m.rt trans.tion. It has.been s.own that the tem.eraturedependent m.tallic conductivity can be well explained by the m.rt m.del that takes.into account electron-electron interactions.and weak localization effects.

关键词： coated conductor buffer layer s.lf-epitaxy CeO2

The s.ngular Kane Os.illator

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Chines. Phys.cs.Letters 2006年第1期23卷 10-12页

作者： Babayev A. m. Cakm.ktepe s. Ins.itute of Phys.cs Azerbaijan Academy of Sciences 370143 Baku Departm.nt of Phys.cs University of Suleyman Demirel Isparta 32260 Turkey

The energy s.ectrum.of carriers.in narrow band gap s.m.conductor nanocrys.als.are s.udied theoretically taking into account the nonparabolicity of charge carriers.dis.ers.on laws. The confinem.nt potential of nanocrys.als.is.approxim.ted to be λγ^2 ＋ λ1γ^-2, and the dis.ers.on laws.are cons.dered within the fram.work of the three-band Kane m.del.

关键词： DIRAC Os.ILLATOR