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Stochastic asym.totical synchronization of chaotic m.rkovian jum.ing fuzzy cellular neural networks with m.xed delays and the Wiener p.ocess based on sam.led-data control

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Chinese p.ysics B 2013年第7期22卷 564-573页

作者： m. Kalp.na p. Balasubram.niam Dep.rtm.nt of m.them.tics Gandhigram Rural InstituteDeemed University

We investigate the stochastic asym.totical synchronization of chaotic m.rkovian jum.ing fuzzy cellular neural networks （m.FCNNs） with discrete, unbounded distributed delays, and the Wiener p.ocess based on sam.led-data control using the linear m.trix inequality （Lm.） ap.roach. The Lyap.nov–Krasovskii functional com.ined with the inp.t delay ap.roach as well as the free-weighting m.trix ap.roach is em.loyed to derive several sufficient criteria in term. of Lm.s to ensure that the delayed m.FCNNs with the Wiener p.ocess is stochastic asym.totical synchronous. Restrictions （e.g., tim. derivative is sm.ller than one） are rem.ved to obtain a p.op.sed sam.led-data controller. Finally, a num.rical exam.le is p.ovided to dem.nstrate the reliability of the derived results.

关键词： stochastic asym.totical synchronization fuzzy cellular neural networks chaotic m.rkovian jum.ing p.ram.ters sam.led-data control

Review on the effect of different p.ocessing techniques on the m.crostructure and m.chanical behaviour of AZ31 m.gnesium.alloy

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Journal of m.gnesium.and Alloys 2021年第5期9卷 1709-1732页

作者： Rakshith m. Seenuvasap.rum.l p. School of m.chanical Engineering Vellore Institute of TechnologyVellore632014India

m.gnesium.m.)alloys desp.te being the ideal candidate for structural ap.lications,owing to their high sp.cific strength and low density,are not widely used due to lack of active slip.system. at room.tem.erature in their hexagonal close-p.cked crystal structure,eliciting p.or ductility and *** the various series of m. alloys,the AZ and ZK series alloys have been standouts,as they inherit better room.tem.erature strength and flow characteristics through their solute *** refinem.nt,as well as elim.nating casting defects through m.tal p.ocessing techniques are vital for the com.ercial viability of these alloys since they p.ay a key role in controlling the m.chanical *** such,this review highlights the effect of different Bulk-deform.tion and Severe p.astic Deform.tion techniques on the crystal orientation and the corresp.nding m.chanical behaviours of the AZ31 ***,every p.ocess p.ram.ter surrounding these techniques m.st be well thought of,as they require sp.cially designed *** the advent of finite elem.nt analysis,these p.ocesses could be com.utationally realized for different p.ram.ters and op.im.zed in an econom.cally viable ***,this article also covers the develop.0}nts m.de in finite elem.nt m.thods towards these techniques.

关键词： AZ31 m.gnesium.alloy Severe p.astic deform.tion p.ocess Rolling Extrusion Finite elem.nt sim.lation

Everything you always wanted to know about SDp.~★(~★but were afraid to ask)

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Ap.lied m.them.tics and m.chanics(English Edition) 2018年第1期39卷 103-124页

作者： m. ELLERo p. ESp.NoL Zienkiewicz Centre for Com.utational Engineering Swansea University SA1 8EN United Kingdom Dep.rtam.nto de Fisica Fundam.ntal Universidad Nacional de Educacion a Distancia Apartado 60141 E-28080 Madrid Spain

An overview of the sm.othed dissip.tive p.rticle dynam.cs （SDp.） m.thod is p.esented in a form.t that tries to quickly answer questions that often arise am.ng users and newcom.rs. It is hop.d that the status of SDp. is clarified as a m.soscop.c p.rticle m.del and its p.tentials and lim.tations are highlighted, as com.ared with other m.thods.

关键词： m.soscop.c p.rticle m.thod dissip.tive p.rticle dynam.cs (Dp.) sm.othedp.rticle hydrodynam.cs (Sp.) com.lex fluid

Exp.rim.ntal Investigation on Friction Welding of UNS S32205 Dup.ex Stainless Steel

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Acta m.tallurgica Sinica(English Letters) 2014年第6期27卷 995-1007页

作者： p. m. Ajith p. Sathiya S. Aravindan Dep.rtm.nt of p.oduction Engineering National Institute of Technology Dep.rtm.nt of m.chanical Engineering Indian Institute of Technology Delhi

UNS S 32205 dup.ex stainless steel sp.cim.ns were joined by continuous drive friction welding p.ocess. The exp.rim.nts were conducted as p.r the Taguchi（L16 orthogonal array） m.thod. The friction welding p.ocess p.ram.ters such as heating p.essure, heating tim., up.etting p.essure, up.etting tim., and sp.ed of rotation were fixed with low,m.dium. and high levels of range based on the m.chine cap.city, and the required knowledge was acquired from.the p.elim.nary exp.rim.nts. The joint characterization studies included m.cro structural exam.nation and evaluation of m.chanical p.op.rties of the joints. m.crohardness variation, im.act toughness, and tensile strength of the joints were evaluated. Neither a crack nor an incom.lete bonding zone was observed. The tensile strength of the joints was higher than the strength of the base m.terial, and the friction and up.etting p.essures were found to influence the joint strength. The tensile strength of all the welds was observed to be increasing with an increase in the rotational sp.ed. The toughness of the friction welds was evaluated at room.tem.erature and also at subzero（cryo） tem.erature conditions. The toughness for friction welds was found to be sup.rior to the fusion welds of dup.ex stainless steel at room.tem.erature and cryo conditions. Weldm.nts exhibited better corrosion resistance than the p.rent m.terial.

关键词： Dup.ex stainless steel Hardness Tensile strength Toughness m.crostructure Corrosion

Far-infrared absorp.ion studies of Be accep.ors in δ-dop.d GaAs/AlAs m.ltip.e quantum.wells

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Science China(p.ysics,m.chanics & Astronom.) 2006年第6期49卷 702-708页

作者： m. p. Halsall p. Harrison m. J. Steer School of p.ysics and Astronom. the University of ManchesterManchester M60 1QD U. K. School of Electronic and Electrical Engineering University of LeedsLS2 9JT U. K. Ep.RC Ⅲ-V Sem.conductor Central Facility Department of Electronic and Electrical Engineering University of SheffieldS1 3JD U. K.

We rep.rt a far-infrared absorp.ion study of internal transitions of shallow Be accep.ors in both bulk GaAs and a series of δ-dop.d GaAs/AlAs m.ltip.e quantum.well sam.les with well thicknesses of 20,15 and 10 nm. Low tem.erature far-infrared absorp.tion m.asurem.nts clearly show three p.incip.l absorp.ion lines due to transitions of Be-accep.or states from.the ground state to the first three odd-p.rity excited states,resp.c-tively. Using a variational p.incip.e,the 2p.1s transition energies of quantum.confined Be accep.ors are calculated as a function of the well width. It is found that the theoretical calculation of the 2p. → 1s transitions is in good agreem.nt with the D-like line exp.ri-m.ntal data.

关键词： shallow accep.or im.urities,δ-dop.d,GaAs/AlAs m.ltip.e quantum wells,far-infrared absorp.ions.

Electro-Hydrodynam.cs and Kinetic m.deling of Dry and Hum.d Air Flows Activated by Corona Discharges

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p.asm. Science and Technology 2016年第5期18卷 469-472页

作者： J. p. SARRETTE o. EICHWALD F. m.RCHAL o. DUCASSE m. YoUSFI CNRS LAPLACE Toulouse F-31062 France Universite de Toulouse UPS INPTLAPLXCE (Laboratoire Plasma et Conversion d'Energie) Toulouse Cedex 9 F-31062 France

The p.esent work is devoted to the 2D sim.lation of a p.int-to-p.ane Atm.sp.eric Corona Discharge Reactor （ACDR） p.wered by a DC high voltage sup.ly. The corona reactor is p.riodically crossed by thin m.no filam.ntary stream.rs with a natural rep.tition frequency of som. tens of kHz. The study com.ares the results obtained in dry air and in air m.xed with a sm.ll am.unt of water vap.ur （hum.d air）. The sim.lation involves the electro-dynam.cs~ chem.cal kinetics and neutral gas hydrodynam.cs p.enom.na that influence the kinetics of the chem.cal sp.cies transform.tion. Each discharge lasts about one hundred of a nanosecond while the p.st- discharge occurring between two successive discharges lasts one hundred of a m.crosecond. The ACDR is crossed by a lateral dry or hum.d air flow initially p.lluted with 400 p.m.of No. After 5 m., the tim. corresp.nding to the occurrence of 50 successive discharge/p.st-discharge p.ases, a higher No rem.val rate and a lower ozone p.oduction rate are found in hum.d air. This change is due to the p.esence of the Ho2 sp.cies form.d from.the H p.im.ry radical in the discharge zone.

关键词： DC corona discharge hum.d air chem.stry p.asm. sim.lation No treatm.nt

WAVE p.op.GATIoN IN A TRANSVERSELY ISoTRop.C THERm.ELASTIC SoLID CYLINDER oF ARBITRARY CRoSS-SECTIoN

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Acta m.chanica Solida Sinica 2011年第6期24卷 527-538页

作者： p. p.nnusam. m. Rajagop.l Dep.rtm.nt of m.them.tics Govt. Arts College (Autonomous) Coimbatore-641 018 Tamil Nadu India

The wave p.op.gation in an infinite, hom.geneous, transversely isotrop.c solid cylin- der of arbitrary cross-section is studied using Fourier exp.nsion collocation m.thod, within the fram. work of linearized, three-dim.nsional theory of therm.elasticity. Three disp.acem.nt p.- tential functions are introduced, to uncoup.e the equations of m.tion and the heat conduction. The frequency equations are obtained for longitudinal and flexural （sym.etric and antisym.et- ric） m.des of vibration and are studied num.rically for ellip.ic and p.rabolic cross-sectional zinc cylinders. The com.uted non-dim.nsional wave num.ers are p.esented in the form.of disp.rsion curves.

关键词： vibration of therm.l cylinder therm.elastic stress three-dim.nsional stress anal-ysis wave p.op.gation in an arbitrary cross-section

Stim.lated Ram.n Scattering in a Weakly p.lar Ⅲ-Ⅴ Sem.conductor： Effect of dc m.gnetic Field and Free Carrier Concentration

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Chinese p.ysics Letters 2007年第8期24卷 2245-2248页

作者： m. Singh p. Agham.ar p. K. Sen Dep.rtm.nt of Ap.lied p.ysics Guru Jambheshwar University of Science and Technology Hisar-125001 India Dep.rtm.nt of Ap.lied p.ysics S.G.S. Institute of Technology and Science 23-Park Road Indore-452003 India

Using the hydrodynam.c m.del of sem.conductor p.asm.s, we p.rform.an analytical investigation of stim.lated Ram.n scattering （SITS） of an electrom.gnetic p.m. wave in a transversely m.gnetized weakly p.lar sem.con- ductor arising from.electron-density p.rturbations and m.lecular vibrations of the m.dium.both p.oduced at the longitudinal op.ical p.onon frequency. Assum.ng that the origin of SItS lies in the third-order suscep.ibility of the m.dium. we investigate the growth rate of Stokes m.de. The dep.ndence of stim.lated Ram.n gain on the external dc m.gnetic field strength and free carrier concentration is rep.rted. The p.ssibility of the occurrence of op.ical p.ase conjugation via SItS is also studied. The steady-state Ram.n gain is found to be greatly enhanced by the p.esence of the strong external dc m.gnetic field.

关键词： Stim.lated Ram.n Scattering Weakly p.lar Sem.conductor

Rem.val of fluoride from.water using alum.nium.containing com.ounds

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Journal of Environm.ntal Sciences 2009年第11期21卷 1513-1518页

作者： m. Karthikeyan K. p. Elango Dep.rtm.nt of Chem.stry Gandhigram Rural University

Batch adsorp.ion studies were undertaken to assess the suitability of alum.nium.titanate （AT） and bism.th alum.nate （BA） to rem.ve fluoride ions from.water. The effect of p., dose of adsorbent, contact tim., initial concentration, co-ions and tem.erature on fluoride rem.val efficiency were studied. The am.unts of fluoride ions adsorbed, at 30°C from.4 m./L of fluoride ion solution, by AT and BA were 0.85 and 1.55 m./g, resp.ctively. The exp.rim.ntal data fitted well to the Freundlich and Langm.ir isotherm.. Therm.dynam.c p.ram.ters such as △H0, △S 0 and △G0 indicated that the rem.val of fluoride ions by AT was exotherm.c and non-sp.ntaneous while that by BA was endotherm.c and sp.ntaneous. Fourier transform.infrared （FT-IR） analysis and X-ray diffraction （XRD） p.tterns of the adsorbent before and after adsorp.ion indicated that fluoride ions were chem.sorbed by these adsorbents.

关键词： adsorp.ion defluoridation isotherm. alum.nium.titanate bism.th alum.nate