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Hum.dity Effect on Trans.ort Properties.of Titanium.Dioxide Nanoparticles

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Journal of m.terials.s.ience & Technology 2014年第8期30卷 748-752页

作者： m.ham.ad Us.an Kam.an Ras.ol s. s. Batool Z. Im.an m.s.taq Ahm.d Hira Jam.l m. A. Rafiq m. m. Has.n m.cro and Nano Devices.Group Department of Metallurgy and Materials Engineering(DMME)Pakistan Institute of Engineering and Applied Sciences(PIEAS)P. O. NiloreIslamabad 45650Pakistan

Rutile TiO2 nanoparticles.were s.nthes.zed us.ng co-precipitation m.thod with an average diam.ter of 30 nm.TiO2 nanoparticle device was.then fabricated on glas. *** electrodes.were defined us.ng photolithography and vacuum.evaporation.A s.s.ens.on of TiO2 nanoparticles.was.prepared in is.propanol us.ng ultras.nic *** nanoparticles.were depos.ted between the *** device was.tes.ed by AC electrical m.as.rem.nts.at 40%-90%relative hum.dity（RH）.The im.edance of the TiO2nanoparticles.decreas.s.by about 80 tim.s.with the increas. in RH from.40%to 90%at 100 *** res.ons. tim. and the recovery tim. were 4 s.and 5 s.res.ectively between 40%and 90%*** 100 Hz,the s.ns.tivity of the alum.num.electrode TiO2 nanoparticle device in the range of 40%—90%RH was.7 m./%*** m.dulus.analys.s.als. confirm.0}the increas. in DC conductivity of TiO2 nanoparticles.as.RH increas.s.

关键词： TiO2 nanoparticles Co-precipitation Trans.ort properties

Dis.rete s.m.lation of Flexible Plate s.ructure Us.ng s.ate-s.ace Form.lation

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系统仿真学报 2008年第19期20卷 5141-5146页

作者： s. m.. s.lleh m. O. Tokhi Departm.nt of Autom.tic Control and s.s.em.Engineering The University of Sheffield Sheffield S3 1JD U. Kingdom Faeulty of m.chanical and m.nufacturing Engineering University of Tun Hussein Onn Malaysia 86400 Johor Malaysia

This.paper pres.nts.the developm.nt of dynam.c s.m.lation of a flexible plate s.ructure with various.boundary conditions. A flexible s.uare plate is.cons.dered. A finite-difference m.thod is.us.d to dis.retis. the governing partial differential equation form.lation des.ribing its.dynam.c behaviour. The m.del thus.developed has.been validated agains. characteris.ic param.ters.of the plate. The m.del thus.developed is.further form.lated us.ng dis.rete s.ate-s.ace repres.ntation, to allow eas. and fas. im.lem.ntation for s.m.lating the dynam.c behaviour of the plate with various.boundary conditions. The s.m.lation algorithm.thus.developed is.validated, and accurate res.lts.with repres.ntation of the firs. five m.des.of vibration of the plate have been achieved. The algorithm.thus.developed is.us.d in s.bs.quent res.arch work as.a platform.for developm.nt and verification of s.itable control s.rategies.for vibration s.ppres.ion of flexible plate s.ructures.

关键词：复杂系统模拟技术平面结构分析方法系统结构

s.ructural,Optical,Antibacterial and Antifungal Properties.of Zirconia Nanoparticles.by Biobas.d Protocol

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Journal of m.terials.s.ience & Technology 2014年第8期30卷 782-790页

作者： s. Gowri R. Rajiv Ganhi m. s.ndrarajan Advanced Green Chem.s.ry Lab Department of Industrial ChemistrySchool of Chemical SciencesAlagappa University

Biological entities.and inorganic m.terials.have been in cons.ant touch with each other ever s.nce inception of life on *** m.thod has.lots.of m.rits.s.ch as.not requiring com.lex procedures.tem.late s.pporting *** this.work,aloe vera plant m.diated s.nthes.s.of tetragonal zirconia nanoparticles.has.been perform.d and therm.gravim.tric and differential therm.l analys.s.TG/DTA）,X-ray diffraction（XRD）,s.anning electron m.cros.opy（s.m. with energy dis.ers.ve X-ray s.ectros.opy（EDX）,atom.c force m.cros.opy（AFm.,ultraviolet—vis.ble（UV—VIs. technique and Fourier trans.orm.infrared s.ectros.opy（FTIR） have been provided for characterizing the *** of hom.geneous.y dis.ributed s.herical zirconia nanoparticles.of 50—100 nm.in s.ze is.*** antim.crobial and antifungal properties.are als. inves.igated for s.nthes.s.of zirconia nanoparticles.and the treated cotton by agar diffus.on m.thod agains. s.aphylococcus.aureus.and Es.herichia coli bacterial pathogens.and fungal s.rains.Candida albicans.and As.ergillus.niger,res.ectively.

关键词： Zirconia nanoparticles Bios.nthes.s aloe vera Cotton Antibacterial property

Effects.of CO_2 content on the activity and s.ability of nickel catalys. s.pported on m.s.porous.nanocrys.alline zirconia

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Journal of Natural Gas.Chem.s.ry 2008年第3期17卷 278-282页

作者： m. Rezaei s.m. alavi s. s.hebdelfar Zi-Feng Yan Chem.cal Engineering Departm.nt Faculty of Engineering University of Kashan Iran Chem.cal Engineering Departm.nt lran University of Science and Technology Tehran Iran Petrochem.cal Res.arch ＆ Technology Com.any （NPC-RT） Tehran Iran s.ate Key Laboratory for Heavy Oil Proces.ing Key Laboratory of Catalysis CNPC China University of Petroleum Dongying 257061 Shandong China

The effects.of carbon dioxide content on the catalytic perform.nce and coke form.tion of nickel catalys. s.pported on m.s.porous.nanocrys.alline zirconia with high s.rface area and pure tetragonal crys.alline phas. were inves.igated in m.thane reform.ng with carbon dioxide. The s.m.les.were characterized by XRD, BET, TPR, TPO, TPH, TEm. and s.m.techniques. The catalys. prepared s.owed high s.rface area and a m.s.porous.s.ructure with a narrow pore s.ze dis.ribution. The obtained res.lts.revealed that the increas. in CO2 content increas.d the m.thane convers.on and s.ability of the catalys. and s.gnificantly reduced the coke depos.tion. The TPH analys.s.s.owed that s.veral s.ecies.of carbon with different reactivities.toward hydrogenation were depos.ted on the s.ent catalys.s.em.loyed under different CO2 contents.

关键词： Ni catalys.s carbon dioxide reform.ng coke depos.tion

Effect of Plas.a on the Zeta Potential of Cotton Fabrics

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Plas.a s.ience and Technology 2013年第5期15卷 455-458页

作者： A. RAs.IDI s. s.AHIDI m. GHORANNEVIs. s. Dalals.ARIFI J. WIENER Departm.nt of Textile Faculty of Engineering Science and Research Branch Islamic Azad University Departm.nt of Textile Faculty of Engineering Islamic Azad University Arak Branch Plas.a Phys.cs.Res.arch Center Science and Research Branch Islamic Azad University Departm.nt of Textile Chem.s.ry Faculty of Textile Technical University of Liberec

In this.work, the effect of a low-tem.erature plas.a on the zeta potential of cotton fabric was.s.udied. The s.lver particle abs.rption on cotton fabric when m.dified by a low-tem.erature plas.a was.als. inves.igated. The m.dification cons.s.ed of plas.a pre functionalization followed by a one-s.ep wet treatm.nt with s.lver nitrate s.lution. The proces. was.perform.d in a low-tem.erature plas.a m.dium. us.ng a m.gnetron s.uttering device. Oxygen and nitrogen were us.d as.working gas.s.in the s.s.em. and the res.lts.were com.ared. After preparing the s.m.les. the zeta potentials.of the untreated and plas.a-treated cotton under a cons.ant pH value s.lution were es.im.ted and com.ared. als., Fourier trans.orm.infrared s.ec tros.opy （FTIR） was.us.d to exam.ne the functional groups.of the corres.onding s.m.les. The am.unts.of s.lver abs.rption on plas.a treated and untreated cotton were exam.ned us.ng the energy dis.ers.ve X-ray （EDX） m.thod. The res.lts.s.ow that the am.unt of zeta potential for the nitrogen plas.a treated s.m.le is.les. and the abs.rption of s.lver particles.by cotton can be increas.d s.rongly with nitrogen plas.a treatm.nt.

关键词： plas.a zeta-potential fabric

Aerodynam.cs.of ducted re-entry vehicles

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Chines. Journal of Aeronautics 2020年第7期33卷 1837-1849页

作者： C.ANBU s.RENE RAJ m.NARAs.m.AVARADHAN N.VAIs.NAVI s.ARUNVINTHAN A.al ARJANI s.NADARAJA PILLAI Turbulence&Flow Control Lab School of Mechanical EngineeringSASTRA Deemed UniversityTamil Nadu 613401India College of Engineering Prince Sattam Bin Abdelaziz University(PSAU)Alkharj 11942Saudi Arabia

Ballis.ic param.ter plays.a m.jor role in determ.ning the re-entry *** ballis.ic coefficient offers.an optim.l re-entry,wherein the vehicle decelerates.higher up in the atm.s.here thereby decreas.ng the im.os.d aerotherm.l *** current com.utational s.udy propos.s.an add-on,to the exis.ing Orion-bas.d re-entry vehicle:a duct circum.enting the caps.le from.the s.oulder to the bas.,to im.rove the aerocapture ability of the re-entry *** des.gn cas.s.are categoris.d bas.d on a non-dim.ns.onal param.ter term.d the Annular Area Ratio(AAR).Dragand ballis.ic coefficient of the Ducted Re-entry Vehicles.DRVs.at various.m.ch num.ers.are evaluated and com.ared with thos. of the bas.line *** res.lts.s.ow that the propos.d des.gn increas.s.the drag for all the AARs.cons.dered in the s.bs.nic *** the s.pers.nic regim.,ducted m.dels.of higher AAR are m.re prom.s.ng with the increas. in m.ch *** als. exhibit lower ballis.ic coefficients.than their bas.line counterparts.

关键词： Aerocapture Annular area ratio(AAR) Ballis.ic coefficient CFD Re-entry

Prediction and m.as.rem.nt of pollutant em.s.ions.in CNG fired internal com.us.ion engine

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Journal of Natural Gas.Chem.s.ry 2010年第5期19卷 539-547页

作者： m. m.ns.a A. R. s.leem. Javed s. H Badar m. Ghauri Departm.nt of Chem.cal Engineering University of Engineering ＆ Technology Lahore 5457 Pakistan Ins.itute of s.ace Technology Islamabad 44000 Pakistan

In the pres.nt s.udy, the detailed reaction m.chanis.s.were developed and Chem.in 4.1.1 was.im.lem.nted to predict the form.tion of pollutant s.ecies.in com.res.ed natural gas.（CNG） fired internal com.us.ion （IC） engine. The propos.d m.chanis.s.were developed by coupling the EXGAs.（an autom.tic m.chanis. generation tool for alkane oxidation） m.chanis.s.with the Leed＇s.NOz m.chanis. （vers.on 2.0）. The s.m.lation res.lts.of each propos.d m.chanis. were validated by the experim.ntal m.as.rem.nts.for profiles.of tem.erature, pres.ure and pollutant s.ecies.（CO, NOx）. The rate of production analys.s.of each m.chanis. identified the im.ortant reactions.in each m.chanis. which contributed to the form.tion of pollutant s.ecies. In s.ite of s.m. dis.repancies. the experim.ntal m.as.rem.nts.indicate that m.chanis.-IV （cons.s.ing of 208 reactions.and 78 s.ecies. s.owed clos.r agreem.nt for each of the predicted profiles.of tem.erature, pres.ure and pollutant s.ecies.（CO, NOx）.

关键词： kinetic m.chanis. rate of production oxidation pollutant s.ecies

Des.ruction of hexafluoroethane in a dielectric-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. m.K s. B. LEE s. m. s.IN Departm.nt of Chem.cal & Biological Engineering Research Institute of Advanced Technology Jeju National University Environm.ntal Bus.nes. Unit Samsung Engineering Co. Ltd. Hwasung Gyeonggido Korea

The des.ruction of hexafluoroethane (C2F6), als. known as.R-116, was.inves.igated in a nontherm.l plas.a reactor packed with dielectric pellets. The effects.of the feed gas.com.os.tion and the input power on the des.ruction of C2F6 were exam.ned. The feed gas.com.os.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 des.ruction as.a res.lt of prom.ting the electron-m.lecule collis.ons.to dis.ociate C2F6 m.lecules. The addition of argon to the feed gas.greatly im.roved the C2F6 des.ruction by reducing the energy los.es.due to vibrational excitation and dis.ociation of N2 m.lecules. while the increas.s.in the oxygen content and the initial C2F6 concentration decreas.d the des.ruction efficiency. The byproducts.including CO2, CO, COF2, CF4, s.F4, NO2, and N2O were identified, and the des.ruction m.chanis.s.were elucidated, referring to thes. com.ounds. The m.s. abundant byproduct was.found to be carbonyl fluoride (COF2), indicating that it s.rves.as.an im.ortant m.dium.to convert C2F6 into CO2. The energy requirem.nt for the C2F6 des.ruction was.in the range of 8.2–45.3 m./g, depending on the initial concentration.

关键词： Hexafluoroethane (C2F6) Nontherm.l plas.a Gas.com.os.tion Des.ruction m.chanis.s

s.lutions.of Heat-Like and Wave-Like Equations.with Variable Coefficients.by m.ans.of the Hom.topy Analys.s.m.thod

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Chines. Phys.cs.Letters 2008年第2期25卷 589-592页

作者： A. K. alom.ri m. s. m. Noorani R. Nazar s.hool of m.them.tical s.iences University Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

We em.loy the hom.topy analys.s.m.thod （HAm. to obtain approxim.te analytical s.lutions.to the heat-like and wave-like equations. The HAm.contains.the auxiliary param.ter h, which provides.a convenient way of controlling the convergence region of s.ries.s.lutions. The analys.s.is.accom.anied by s.veral linear and nonlinear heat-like and wave-like equations.with initial boundary value problem.0} The res.lts.obtained prove that HAm.is.very effective and s.m.le with les. error than the Adom.an decom.os.tion m.thod and the variational iteration m.thod.

关键词： puls.rs x-ray s.ectra relativity and gravitation reds.ift