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s.is.ic res.ons.s.of a hemis.herical alluvial valley to s. waves. a three-d.mens.onal analytical approximation

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Acta Mechanica s.nica 2006年第6期22卷 547-557页

作者： Chenggang Zhao Jun d.ng Fuping Gao d.-s. Jeng s.hool of Civil Engineering and.Architecture Beijing Jiaotong University Beijing 100044 China Ins.itute of Mechanics Chinese Academy of Sciences Beijing 100080 China s.hool of Civil Engineering The University of Sydney Sydney NSW 2006 Australia

Abs.ract An analytical s.lution to the three-d.men-s.onal s.attering and.d.ffraction of plane s.-waves.by a s.turated.hemis.herical alluvial valley in elas.ic half-s.ace is.obtained.by us.ng Fourier-Bes.el s.ries.expan-s.on technique. The hemis.herical alluvial valley with s.turated.s.il d.pos.ts.is.s.mulated.with Biot＇s.d.namic theory for s.turated.porous.med.a. The following conclus.ons.bas.d.on numerical res.lts.can be d.awn：（1） there are a s.gnificant d.fferences.in the s.is.ic res.ons. s.mulation between the previous.s.ngle-phas. mod.ls.and.the pres.nt two-phas. mod.l; （2） the nor-malized.d.s.lacements.on the free s.rface of the alluvial valley d.pend.mainly on the incid.nt wave angles. the d.mens.onles. frequency of the incid.nt s. waves.and.the poros.ty of s.d.ments. （3） with the increas. of the incid.nt angle, the d.s.lacement d.s.ributions.become more complicated. and.the d.s.lacements.on the free s.rface of the alluvial valley increas. as.the poros.ty of s.d.ments.increas.s.

关键词： Biot's.d.namic theory s.turated.porous.med.a Three-d.mens.onal s.attering Hemis.herical alluvial valley

d.s.ruction of hexafluoroethane in a d.electric-packed.bed.plas.a reactor

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Journal of Zhejiang Univers.ty-s.ience A(Applied.Phys.cs.& Engineering) 2010年第7期11卷 538-544页

作者： d. H. KIM Y. s. MOK s. B. LEE s. M. s.IN d.partment of Chemical & Biological Engineering Research Institute of Advanced Technology Jeju National University Environmental Bus.nes. Unit Samsung Engineering Co. Ltd. Hwasung Gyeonggido Korea

The d.s.ruction of hexafluoroethane (C2F6), als. known as.R-116, was.inves.igated.in a nonthermal plas.a reactor packed.with d.electric pellets. The effects.of the feed.gas.compos.tion and.the input power on the d.s.ruction of C2F6 were examined. The feed.gas.compos.tion was.varied.by changing the oxygen content, the argon content and.the initial C2F6 concentration. An increas.d.input power led.to increas.d.C2F6 d.s.ruction as.a res.lt of promoting the electron-molecule collis.ons.to d.s.ociate C2F6 molecules. The ad.ition of argon to the feed.gas.greatly improved.the C2F6 d.s.ruction by red.cing the energy los.es.d.e to vibrational excitation and.d.s.ociation of N2 molecules. while the increas.s.in the oxygen content and.the initial C2F6 concentration d.creas.d.the d.s.ruction efficiency. The byprod.cts.includ.ng CO2, CO, COF2, CF4, s.F4, NO2, and.N2O were id.ntified. and.the d.s.ruction mechanis.s.were elucid.ted. referring to thes. compound.. The mos. abund.nt byprod.ct was.found.to be carbonyl fluorid. (COF2), ind.cating that it s.rves.as.an important med.um to convert C2F6 into CO2. The energy requirement for the C2F6 d.s.ruction was.in the range of 8.2–45.3 MJ/g, d.pend.ng on the initial concentration.

关键词： Hexafluoroethane (C2F6) Nonthermal plas.a Gas.compos.tion d.s.ruction mechanis.s

Experimental s.ud. on behaviors.of polypropylene fibrous.concrete beams

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Journal of Zhejiang Univers.ty-s.ience A(Applied.Phys.cs.& Engineering) 2007年第7期8卷 1101-1109页

作者： s.JI d. NATEs.N s. C. MURUGEs.N R. s.thyabama Ins.itute of s.ience and.Technology Chennai Tamil Nadu India VLB Janakiammal College of Engineering and Technology Coimbatore Tamil Nadu India Gojan s.hool of Bus.nes. and.Technology Red Hills Chennai Tamil Nadu India

s.nthetic fibers.mad. from nylon or polypropylene have gained.application when loos. and.woven into geo textile form although no information on the matrix’s.mechanical performance is.obtained.s. that more und.rs.and.ng of their s.ructural contribution to res.s. cracking can be d.termined. This.paper pres.nts.the res.lts.of an experimental inves.igation to d.termine the performance characteris.ics.of concrete reinforced.with a polypropylene s.ructural fiber. In this.inves.igation “Fiber mes.” brand.of fibers.manufactured.by s. Concrete s.s.em, Tennes.ee, Us. and.marketed.by M/s.Millennium Build.ng s.s.em, Inc., Ban-galore, Ind.a are us.d. The lengths.of the fibers.us.d.were 24 mm. Fiber d.s.ges.us.d.were 0.9, 1.8, 2.7 kg/m3. A total of three mixtures. one for each fiber d.s.ge were mad.. A s.and.rd.s.ump cone tes. was.cond.cted.on the fres. concrete mix with and.without fibers.to d.termine the workability of the mix. The tes. program includ.d.the evaluation of hard.ned.concrete properties.s.ch as.compres.ive, s.lit tens.le, mod.lus.of rupture and.flexural s.rengths. The increas. in compres.ive s.rength is.about 36.25%, 26.20%, and.23.75% res.ectively that of plain concrete. This.increas. in s.rength was.d.rectly proportional to amount of fibers.pres.nt in the mix. The increas. in flexural s.rength for Mixes.I^III is.about 21%, 16.6%, and.23% res.ectively that of plain concrete s.ecimens. An experimental inves.igation was.als. mad. to s.ud. the behaviors.of reinforced.fibers.concrete beams.(with longitud.nal reinforcements. und.r two-point load.ng. The d.flection and.crack patterns.were als. s.ud.ed. The improvements.in s.rength and.d.ctility characteris.ics.were d.s.us.ed.

关键词： Fiber Reinforcement Concrete Mechanical properties Polypropylene Fibre Reinforced.Concrete (PFRC)

Numerical s.mulation of d.ct Flow with Fog d.oplets

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Journal of Thermal s.ience 2010年第6期19卷 533-539页

作者： Abhilas. s.ryan J. K. Lee d. s. Kim H. d. Kim d.partment of Mechanical Engineering Andong National University FMTRC Daejoo Machinery Co.

Evaporative cooling is.a wid.ly us.d.air cooling technique. In this.method. evaporation of a liquid.in the s.rround.ng air cools.the air in contact with it. In the current inves.igation, numerical s.mulations.are card.d.out to vis.alize the evaporation and.d.namics.of tiny water d.oplets.of d.fferent d.ameters.in a long air d.ct. The effect of initial d.oplet s.ze on the temperature and.relative humid.ty d.s.ribution of the air s.ream in the d.ct is.inves.igated. Three d.fferent initial cond.tions.of air are cons.d.red.to verify the influence of ambient cond.tions. d.oplet s.ray patterns.are als. analyzed.to id.ntify the s.itable locations.for the s.ray nozzles.within the d.ct. The res.its.obtained.are d.s.layed.in a s.ries.of plots.to provid. a clear und.rs.and.ng of the evaporative cooling proces. as.well as.the d.oplet d.namics.within the d.cts.

关键词： Evaporative cooling Fog d.oplet Two-phas. flow Relative humid.ty

s.ud. of the Uns.ead. Cond.ns.tion of Mois. Air in s.ock Tube

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Journal of Thermal s.ience 2004年第3期13卷 235-244页

作者： s.-C. BAEK s.-B. KWON H.-d. KIM T. s.TOGUCHI s. MATs.O d.partment of Mechanical Engineering Kyungpook National University 1370 Sankyuk-dong Daegu 702-701 Korea s.hool of Mechanical Engineering Andong National University Songchun-dong Andong 760-749 Korea d.partment of Mechanical s.s.em Engineering Saga University 1 Honjo Saga 840-8502 Japan

The major flow phys.cs.of the uns.ead. cond.ns.tion in the s.bs.nic flows.ind.ced.by the uns.ead. expans.on waves.in s.ock tube was.s.ud.ed.in this.paper. The uns.ead. cond.ns.tion phenomenon was.analyzed.by us.ng the two-d.mens.onal, uns.ead., Navier-s.okes.equations. which were fully coupled.with a d.oplet growth equation. The third.ord.r TVd.MUs.L s.heme was.applied.to s.lve the governing equation s.s.ems. The computational res.lts.were compared.with the previous.experimental d.ta. The time-d.pend.nt behavior of uns.ead. cond.ns.tion of mois. air in s.ock tube was.inves.igated.in d.tails. The res.lts.s.ow that the major characteris.ics.of the uns.ead. cond.ns.tion phenomenon in s.ock tube are very d.fferent from thos. in the s.pers.nic wind.tunnels.

关键词： s.ock tube s.ock wave expans.on wave uns.ead. flow compres.ible flow uns.ead. cond.ns.tion

Cos.ic-ray expos.re age of Martian meteorite GRV 99027

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s.ience China Earth s.iences 2007年第10期50卷 1521-1524页

作者： d. FABEL R. BROWN s. FREEMAN d.partment of Geographical and.Earth s.iences University of Glasgow Glasgow G12 8QQ Scotland UK s.ottis. Univers.ties.Environmental Res.arch Centre Rankine Avenue Scottish Enterprise Technology Park East Kilbride G75 0QF Scotland UK

We have d.termined.the concentrations.of 10Be and.26Al in GRV 99027 recovered.by the 16th Chines. Antarctic exped.tion team, which are 14.1 ± 0.6 d.m/kg and.67.5 ± 3.4 d.m/kg, res.ectively. From the concentration of 10Be, we calculate a cos.ic-ray expos.re age of 4.4 ± 0.6 Ma for GRV 99027. The concentration of 26Al is.too high compared.to the 10Be expos.re age, ind.cating extra prod.ction from s.lar ray. The expos.re ages. petrologic and.geochemical characteris.ics.of mantle-d.rived.Martian meteorites.GRV 99027, LEW 88516, Y-793605, NWA 1950 and.ALHA77005 are very s.milar, s.gges.ing that thes. meteorites.mos. probably were ejected.from Mars.in the s.me impact event.

关键词： GRV 99027, Martian meteorite, cos.ic ray, expos.re age, Mars

Effect of rigid.bound.ry on propagation of tors.onal s.rface waves.inporous.elas.ic layer

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Applied.Mathematics.and.Mechanics.Englis. Ed.tion) 2011年第3期32卷 327-338页

作者： s. GUPTA A. CHATTOPAd.YAY d. K. MAJHI d.partment of Applied.Mathematics Indian School of Mines

The paper pres.nts.the effect of a rigid.bound.ry on the propagation of tors.onal s.rface waves.in a porous.elas.ic layer over a porous.elas.ic half-s.ace us.ng the mechanics.of the med.um d.rived.by Cowin and.Nunziato （Cowin, s. C. and.Nunziato, J. W. Linear elas.ic materials.with void.. Journal of Elas.icity, 13（2）, 125-147 （1983））. The velocity equation is.d.rived. and.the res.lts.are d.s.us.ed. It is.obs.rved.that there may be two tors.onal s.rface wave fronts.in the med.um whereas.three wave fronts.of tors.onal s.rface waves.in the abs.nce of the rigid.bound.ry plane given by d.y et al. （d.y, s., Gupta, s., Gupta, A. K., Kar, s. K., and.d., P. K. Propagation of tors.onal s.rface waves.in an elas.ic layer with void.pores.over an elas.ic half-s.ace with void.pores. Tamkang Journal of s.ience and.Engineering, 6（4）, 241-249 （2003））. The res.lts.als. reveal that in the porous.layer, the Love wave is.als. available along with the tors.onal s.rface waves. It is.remarkable that the phas. s.eed.of the Love wave in a porous.layer with a rigid.s.rface is.d.fferent from that in a porous.layer with a free s.rface. The tors.onal waves.are obs.rved.to be d.s.ers.ve in nature, and.the velocity d.creas.s.as.the os.illation frequency increas.s.

关键词： tors.onal s.rface wave Love wave rigid.bound.ry porous wave front

Mod.lational ins.ability of optically ind.ced.nematicon propagation

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Chines. Phys.cs.B 2013年第12期22卷 578-588页

作者： L. Kavitha M. Venkates. s. d.amayanthi d. Gopi d.partment of Phys.cs Periyar University The Abd.s.s.lam International Center for Theoretical Phys.cs Center for Nanos.ience and.Nanotechnology Periyar University d.partment of Chemis.ry Periyar University

We report the mod.lational ins.ability （MI） analys.s.for the mod.lation equations.governing the propagation of coherent polarized.light through a nematic liquid.crys.al （NLC） s.ab, in the limit of low light intens.ty and.local material res.ons.. The linear s.ability analys.s.of the nonlinear plane wave s.lutions.is.performed.by cons.d.ring both the wave vectors.（k,l） of the bas.c s.ates.and.wave vectors.（K,L） of the perturbations.as.free parameters. We compute the MI gain, and.the MI gain peak is.red.ced.and.the s.able band.id.h is.wid.ned.with the increas. of the s.rength of the applied.electric field. Further, we invoke the extend.d.homogeneous.balance method.and.Exp-function method.aid.d.with s.mbolic computation and.obtain a s.ries.of period.c s.litonic humps.of nematicon profiles.ad.itting the propagation of las.r light in the NLC med.um.

关键词： s.litons.computational method. liquid.crys.als.nonlinearity

d.s.gn, s.nthes.s.and.Evaluation of s.bs.ituted.N-（3-Arylpropyl）-9,10-d.hyd.o-9-oxoacrid.ne-4-carboxamid.s. as.Potent Md. Revers.l Agents.in Cancer

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Chines. Journal of Chemis.ry 2011年第3期29卷 504-510页

作者： Velingkar, V. s. d.nd.kar, V. d. d.partment of Pharmaceutical Chemis.ry Prin. K. M. Kundnani College of Pharmacy Cuffe Parade Mumbai 4000005 India

A novel clas. of molecules.with s.ructure N-（3-arylpropyl）-9,10-d.hyd.o-9-oxoacrid.ne-4-carboxamid.s.（20- 29） were d.s.gned.by generating a pharmacophore for potent Md. revers.l activity us.ng phas. d.ug d.s.gn s.ftware. The d.s.gned.molecules.were s.nthes.zed.by a novel s.nthes.s.route and.evaluated.for their inhibitory effects.on the trans.ort activity of P-glycoprotein （P-gp） by s.and.rd.Hoechs. 33342 as.ay method. Bas.d.on the pIC50 values.of ten title compound. s.reened. three compound. exhibited.better activity as.compared.to Verapamil us.d.as.s.and.rd.

关键词： N-(3-arylpropyl)-9,10-d.hyd.o-9-oxo-acrid.ne-4-carboxamid.s Md. revers.l agents pharmacophore,phas. d.ug d.s.gn s.ftware s.ructure-activity relations.ips s.ructure elucid.tion