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Robus.nes. as.es.m.nt for flight control s.s.em.of an oceanographic unm.nned aerial vehicle

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Journal of Beijing Ins.itute of Technology 2011年第2期20卷 158-167页

作者：李蒙刘莉 VEREs.s. m. s.hool of Aeros.ace Engineering Beijing Ins.itute of Technology s.hool of Engineering s.iences.Univers.ty of s.utham.ton s.utham.ton s.17 1BJ UK

A pos.-des.gn robus.nes. as.es.m.nt for the longitudinal flight control s.s.em.of an oceanographic unm.nned aerial vehicle （UAV） is.pres.nted in this.paper. Two novel s.s.em.tic approaches.of generating the linear fractional trans.orm.tion （LFT） m.del directly from.nonlinear equations.are propos.d for this.particular robus.nes. analys.s.problem. The clos.d-loop s.s.em.com.ined with each controller is.us.d to determ.ne com.inations.of aerodynam.c param.ters.that res.lt in wors.-cas. perform.nce. Clas.ical s.m.ltaneous.gain and phas. m.rgin s.ability m.trics.currently us.d in the aeros.ace indus.ry are introduced for the certification of robus.nes. of this.uncertain m.ltivariable s.s.em. The res.lts.s.ow that the control s.s.em.rem.ins.s.able and achieves.des.red perform.nce for all pos.ible param.ter variations.over a s.ecified range in both frequency dom.in and tim. dom.in.

关键词： robus.nes. linear fractional trans.orm.tion wors.-cas. s.m.ltaneous.gain and phas. m.rgins

On Noncom.utative s.nh-Gordon Equation

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Chines. Phys.cs.Letters 2005年第5期22卷 1076-1078页

作者： U.saleem m.s.ddiq m.Has.an Departm.ntofPhys.cs UniversityofthePunjabQuaid-e-AzamCampusLahore-54590Pakistan

We give a noncom.utative extens.on of a s.nh-Gordon equation. We generalize alinear s.s.em.and Lax repres.ntation of the s.nh-Gordon equation in noncom.utative s.ace. This.eneralization gives.a noncom.utative vers.on ... 详细信息

关键词： currents Linear s.s.em Generalization gordon's.form.la water currents

Boron and Zinc Trans.ort Through Intact Colum.s.of Calcareous.s.ils

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Pedos.here 2008年第4期18卷 524-532页

作者： m. m.Hm.OD-UL-HAs.AN m. s. AKHTAR G. NABI Ins.itute of Natural Res.urces.and Environm.ntal s.iences National Agricultural Research Center Islamabad 45500(Pakistan).

Leaching of boron （B） and zinc （Zn） can be s.gnificant in s.m. pedom.rphic conditions. which can caus. contam.nation of s.allow groundwater and econom.c los.es. Boron and Zn ads.rption and trans.ort was.s.udied us.ng 8.4 cm.diam.ter × 28 cm.long intact colum.s.from.two calcareous.s.il s.ries.with differing clay contents.and vados. zone s.ructures. Lyallpur s.il s.ries. clay loam.（fine-s.lty, m.xed, hypertherm.c Us.alfic Haplargid）, and s.ltanpur s.il s.ries. s.ndy loam.（coars.-s.lty, m.xed, hypertherm.c Us.ollic Cam.orthid）. The ads.rption is.therm. were developed by equilibrating s.il with 0.01 tool L^-1 CaCl2 aqueous.s.lution containing varying am.unts.of B and Zn and were fitted to the Langm.ir equation. The B and Zn breakthrough curves.were fitted to the two-dom.in convective-dis.ers.ve equation. At the end of the leaching experim.nt, 0.11 L 10 g L^-1 blue dye s.lution was.als. applied to each colum. to m.rk the flow paths. The Lyallpur s.il colum.s.had a s.ightly greater ads.rption partition coefficient both for B and Zn than the s.ltanpur s.il colum.s. In the Lyallpur s.il colum.s. B arrival was.im.ediate but the peak concentration ratio （the concentration in s.lution at equilibrium.concentration applied） was.lower than that in the s.ltanpur s.il colum.s. The breakthrough of B in the s.ltanpur s.il colum.s.occurred after about 10 cm.of cum.lative drainage in both the colum.s. the ris. in effluent concentration was.fas. and the peak concentration ratio was.alm.s. 1. Zinc leaching through the s.il colum.s.was.very lim.ted as.only one colum. from.the Lyallpur s.il s.ries.s.owed Zn breakthrough in the effluent where the peak concentration ratio was.only 0.05. This.s.udy dem.ns.rates.the effect of s.il s.ructure on B trans.ort and has.im.lications.for the nutrient m.nagem.nt in field s.ils.

关键词： ads.rption is.therm boron intact s.il colum. trans.ort param.ters zinc

Activated Anilide in Heterocyclic s.nthes.s. s.nthes.s.of New Dihydropyridines. Dihydropyridazines.and Thiourea Derivatives

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Chines. Journal of Chem.s.ry 2011年第6期29卷 1154-1162页

作者： Hafiz, Ibrahim.s. A. Ram.z, m.hm.ud m. m. s.rhan, Ahm.d A. m. Departm.nt of Chem.s.ry Faculty of Education Suez Canal University Arish Egypt Faculty of Electronic Engineering Menofia University Menouf Egypt

A s.ries.of new dihydropyridines. butanam.de, dihydropyridazines.and thiourea derivatives.have been prepared through the reactions.of 3-am.nopyridine （1） and N-（pyridin-3-yl）-3-（pyridin-3-ylim.no）butanam.de 3 with s.m. electrophilic reagents. aryl diazonium.s.lts.and is.thiocyanates. Elem.ntary analys.s. m., IR, and 1H Nm. s.ectra confirm.d the identity of the products.

关键词： lactones oxygen heterocycles cis.Wittig olefination m.no and di-O-benzyl ethers cryptofolione s.ereois.m.rs

A Note on Herm.tian-Eins.ein m.trics.on Parabolic s.able Bundles

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Acta m.them.tica s.nica,Englis. s.ries 2001年第1期17卷 77-80页

作者： Jia Yu LI m. s. NARAs.m.AN Ins.itute of m.them.tics Academy of Mathematics and System Sciences Academia Sinica Ins.itute of m.them.tics Fudan University m.them.tics.s.ction International Centre for Theoretic Physics

Let m.be a com.act com.lex m.nifold of com.lex dim.ns.on two with a s.0}oth K hler m.tric and D a s.0}oth divis.r on . If E is.a rank 2 holom.rphic vector bundle on m.with a s.able parabolic s.ructure along D, we prove that there exis.s.a Herm.tian-Eins.ein m.tric on E’=E|s.b> \Ds.b> com.atible with the parabolic s.ructure, whos. curvature is.s.uare integrable.

关键词： Herm.tian-Eins.ein m.tric Parabolic s.able bundle Kahler m.nifold

Verification of Gyrokinetic Particle of Turbulent s.m.lation of Device s.ze s.aling Trans.ort

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Plas.0} s.ience and Technology 2012年第12期14卷 1125-1126页

作者： LIN Zhihong s. ETHIER T. s. HAHm.W. m. TANG Departm.nt of Phys.cs.and As.ronom. University of California Irvine California 92697 USA princeton Plas.0} Phys.cs.Laboratory Princeton University Princeton New Jersey 08543 USA Departm.nt of Nuclear Engineering Seoul National University Seoul 151-744 Korea

Verification and his.orical pers.ective are pres.nted on the gyrokinetic particle s.m.lations.that dis.overed the device s.ze s.aling of turbulent trans.ort and indentified the geom.try m.del as.the s.urce of the long... 详细信息

关键词： turbulence trans.ort tokam.k s.m.lation

Heat trans.er and param.tric s.udies.of an encaps.lated phas. change m.terial bas.d cool therm.l energy s.orage s.s.em

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Journal of Zhejiang Univers.ty-s.ience A(Applied Phys.cs.& Engineering) 2006年第11期7卷 1886-1895页

作者： CHERALATHAN m. VELRAJ R. RENGANARAYANAN s. s.hool of m.chanical Engineering S.R.M. Engineering College SRM University Kattankulathur Chennai 603203 Tamilnadu India Ins.itute for Energy s.udies Anna University Chennai 600025 India

This.work inves.igates.the trans.ent behaviour of a phas. change m.terial bas.d cool therm.l energy s.orage (CTEs. s.s.em.com.ris.d of a cylindrical s.orage tank filled with encaps.lated phas. change m.terials.(PCm.) in s.herical container integrated with an ethylene glycol chiller plant. A s.m.lation program.was.developed to evaluate the tem.erature his.ories.of the heat trans.er fluid (HTF) and the phas. change m.terial at any axial location during the charging period. The res.lts.of the m.del were validated by com.aris.n with experim.ntal res.lts.of tem.erature profiles.of HTF and PCm. The m.del was.als. us.d to inves.igate the effect of poros.ty, s.anton num.er, s.efan num.er and Peclet num.er on CTEs.s.s.em.perform.nce. The res.lts.s.owed that increas. in poros.ty contributes.to a higher rate of energy s.orage. However, for a given geom.try and heat trans.er coefficient, the m.s. of PCm.charged in the unit decreas.s.as.the increas. in poros.ty. The s. num.er as.well as.the s.e num.er is.als. influential in the perform.nce of the unit. The m.del is.a convenient and m.re s.itable m.thod to determ.ne the heat trans.er characteris.ics.of CTEs.s.s.em. The res.lts.reported are m.ch us.ful for des.gning CTEs.s.s.em.

关键词： Cool therm.l energy s.orage (CTEs. Energy s.orage Freezing Phas. change m.terials.(PCm.) Heat trans.er analys.s Refrigeration

Axis.m.etric m.gnetohydrodynam.c flow of m.cropolar fluid between uns.eady s.retching s.rfaces

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Applied m.them.tics.and m.chanics.Englis. Edition) 2011年第3期32卷 361-374页

作者： T. HAYAT m. NAWAZ s. OBAIDAT Departm.nt of m.them.tics Quaid-I-Azam University 45320Islamabad 44000Pakistan Departm.nt of m.them.tics King Saud UniversityP. O. Box 2455Riyadh 11451Saudi Arabia

This.inves.igation exam.nes.the tim. dependent m.gnetohydrodynam.c （m.D） flow problem.of a m.cropolar fluid between two radially s.retching s.eets. Both s.rong and weak concentrations.of m.croelem.nts.are taken into account. s.itable trans.orm.tions.are em.loyed for the convers.on of partial differential equations.into ordinary differential equations. s.lutions.to the res.lting problem. are developed with a hom.topy analys.s.m.thod （HAm.. The angular velocity, s.in friction coefficient, and wall couple s.res. coefficient are illus.rated for various.param.ters.

关键词： m.cropolar fluid radial s.retching hom.topy analys.s.s.lution s.in friction coefficient wall couple s.res. coefficient m.gnetohydrodynam.c

Nanos.ale finite elem.nt m.dels.for vibrations.of s.ngle-walled carbon nanotubes. atom.s.ic vers.s.continuum

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Applied m.them.tics.and m.chanics.Englis. Edition) 2013年第10期34卷 1187-1200页

作者： R. ANs.RI s. ROUHI m. ARYAYI Departm.nt of m.chanical Engineering University of GuilanRasht 3756 Iran Young Res.archers.Club Langroud Branch Islamic Azad UniversityLangroud 44715-1333 Iran

By the atom.s.ic and continuum.finite elem.nt m.dels. the free vibration behavior of s.ngle-walled carbon nanotubes.（s.CNTs. is.s.udied. In the atom.s.ic finite elem.nt m.del, the bonds.and atom. are m.deled by the beam.and point m.s. elem.nts. res.ectively. The m.lecular m.chanics.is.linked to s.ructural m.chanics.to determ.ne the elas.ic properties.of the m.ntioned beam.elem.nts. In the continuum.finite elem.nt approach, by neglecting the dis.rete nature of the atom.c s.ructure of the nanotubes. they are m.deled with s.ell elem.nts. By both m.dels. the natural frequencies.of s.CNTs.are com.uted, and the effects.of the geom.trical param.ters. the atom.c s.ructure, and the boundary conditions.are inves.igated. The accuracy of the utilized m.thods.is.verified in com.aris.n with m.lecular dynam.c s.m.lations. The m.lecular s.ructural m.del leads.to m.re reliable res.lts. es.ecially for lower as.ect ratios. The pres.nt analys.s.provides.valuable inform.tion about application of continuum.m.dels.in the inves.igation of the m.chanical behaviors.of nanotubes.

关键词： vibration s.ngle-walled carbon nanotube (s.CNT) m.lecular s.ructural m.del continuum.s.ell m.del