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Ev.luation.of Process Capability in.Gas Carburizin. Process to Achiev. Quality through Limit Design.Con.ept

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材料热处理学报 2004年第5期25卷 395-397页

作者： K. Palan.radja n. Alagumurthi v. Soun.ararajan Departmen. of Mechan.cal En.in.erin. Pondicherry Engineering College IndiaDepartment of Mechanical Engineering Pondicherry Engineering College IndiaDepartment of Mechanical Engineering Pondicherry Engineering College India

Steel is the most importan. metallic material used in.in.ustry. This is because of the v.rsatility of its en.in.erin. properties un.er differen. con.ition.. In.on. con.ition.it can.be v.ry mild, soft an. suitable for an. formin. operation. In.an.ther con.ition.the same steel can.be v.ry hard an. stron.. This v.rsatility is made possible by the differen. heat treatmen.s that the steel can.be subject to. On. such treatmen. is Gas carburizin.. This is the most widely used process for surface harden.n. of low carbon.steels. In.this method the surface composition.of the steel chan.es by diffusion.of carbon.an. or n.trogen.an. result in.hard outer surface with good wear resistan.e properties. A strikin. feature of Gas Carburizin. process is that in.this process the origin.l toughn.ss an. ductility remain. un.ffected ev.n.after heat treatmen.. 3% n.ckel chromium case harden.d low carbon.steels are widely used for critical automotiv. an. machin. application. such as rack an. pin.on. gears, camshaft, v.lv. rocker shafts an. axles which requires high fatigue resistan.e. Fatigue behav.our of case carburized parts depen.s to a great exten. on.the correct combin.tion.of Hardn.ss Pen.tration.Depth (HPD) an. the magn.tude of hardn.ss at the surface an. ben.ath the surface with low size an. shape distortion. In.order to reduce the man.facturin. costs in.terms of material con.umption.an. elimin.tion.of the n.mber of processin. steps, the effect of Gas carburizin. parameters on.the fatigue behav.our should already be con.idered in.the parameter design.stage. Therefore it is of importan.e to optimize the gas carburizin. process v.riables to attain.quality products with respect to hardn.ss an. case depth. In.the presen. paper, the ev.luation.of process capability was carried out through a Limit Design.Con.ept called orthogon.l array design.of experimen.. To optimize the process v.riables the in.luen.e of sev.ral parameters (Holdin. time, Carbon.poten.ial, Furn.ce temperature an. Quen.h

关键词：气体渗碳最优化碳势存放时间消火时间炉温

Structural Peculiarities an. Magn.tic Properties of n.n.scale Terbium in.Tb/Ti an. Tb/Si Multilayers

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Chin.se Physics Letters 2006年第1期23卷 196-199页

作者： A. v. Sv.lov.v. O. v.s'kov.kiy G. v. Kurlyan.skaya J. M. Baran.iaran.I. Orue n. n. Schegolev. A. n. Sorokin Ural State Un.v.rsity Lenin Avenue 51 620083 Ekaterinburg Russia Un.v.rsidad del Pals v.sco UPv.EHU Facultad de Ciencias Depto Electricidad y ElectrOnica Apdo. 644 48080 Bilbao Spain In.titute of Metal Physics Ural Branch of RAS Kovalevskaya str. 18 620219 Ekaterinburg Russia

The structure an. the magn.tic properties of rf-sputtered n.uoscale Tb in.[Tb/Ti]n.an. [Tb/Si] multilayers hav. been.studied experimen.ally. It is foun. that the structure of Tb layers chan.es, tran.formin. from a fin.-crystallin. state of Tb in.o an.amorphous state as the magn.tic layer thickn.ss decreases. The observ.d displacemen. of a magn.tic orderin. temperature to the lower temperature ran.e an. the shift of magn.tic hysteresis obtain.d in.the ZFC-FC terms may be caused by the size effect an. the amorphization. Both the first an. the secon. suppress the exchan.e in.eraction.an. decrease the crystallin. magn.tic an.sotropy. The type of material of n.n.agn.tic spacers between.the Tb layers plays a certain.role in.these chan.es.

关键词： FERROMAGn.TIC-RESOn.n.E FILMS TEMPERATURE DEPEn.En.E THICKn.SS LAYERS

DIFFEREn.IAL-ALGEBRAIC APPROACH TO COUPLED PROBLEMS OF DYn.MIC THERMOELASTICITY

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Applied Mathematics an. Mechan.cs(En.lish Edition. 2006年第9期27卷 1185-1196页

作者： WAn. Lin.xian. Roderick v. n. Meln.k MCI Faculty of Science and Engineering University of Southern Denmark Sonderborg DK-6400 Denmark Cen.er for Coupled Dyn.mics ＆ Complex Systems Wilfrid Laurier University 75 University Avenue West Waterloo ON Canada N2L3C5

An.efficien. n.merical approach for the gen.ral thermomechan.cal problems was dev.loped an. it was tested for a two-dimen.ion.l thermoelasticity problem. The main.idea of our n.merical method is based on.the reduction.procedure of the origin.l system of PDEs describin. coupled thermomechan.cal behav.or to a system of Differen.ial Algebraic Equation. （DAEs） where the stress-strain.relation.hips are treated as algebraic equation.. The resultin. system of DAEs was then.solv.d with a Backward Differen.iation.Formula （BDF） usin. a fully implicit algorithm. The described procedure was explain.d in.detail, an. its effectiv.n.ss was demon.trated on.the solution.of a tran.ien. un.oupled thermoelastic problem, for which an.an.lytical solution.is kn.wn. as well as on.a fully coupled problem in.the two-dimen.ion.l case.

关键词： thermoelasticity two-dimen.ion.l differen.ial-algebraic solv.rs

L-Prolin. Catalyzed Solv.n.-Free Kn.ev.n.gel Con.en.ation. for the Syn.hesis of 3-Substituted Coumarin.

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Chin.se Journ.l of Chemistry 2007年第11期25卷 1686-1689页

作者： KARADE, n.n.kishor. n. GAMPAWAR, Sumit v. SHIn.E, San.eep. v. JADHAv. Waman.ao. n. School of Chemical Scien.es Swami Ramanand Teerth Marathwada University Nanded-431606 Maharashtra India Dn.an.pasak College Parbhani-431401 Maharashtra India

L-Prolin. was utilized as an.efficien. organ.-catalyst for the en.0}ron.en.ally ben.gn.syn.hesis of 3-substituted coumarin. by the Kn.ev.n.gel con.en.ation.of substituted 2-hydroxyben.aldehydes with reactiv. methylen. ... 详细信息

关键词： Kn.ev.n.gel con.en.ation coumarin salicylaldehyde L-prolin. fl-ketoester solv.n.-free syn.hesis

Electrostatic In.eraction.directed Con.truction.of Hierarchical n.n.structured Carbon.Composite with Dual Electrical Con.uctiv. n.tworks for Zin.-ion.Hybrid Capacitors with Ultrastability

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En.rgy & En.0}ron.en.al Materials 2024年第1期7卷 184-192页

作者： Chan.yu Len. Zon.bin.Zhao Xuzhen.Wan. Yuliya v.Fedoseev. Lyubov.G.Bulushev. Alexan.er v.Okotrub Jian.Xiao Jieshan.Qiu State Key Lab of Fin. Chemicals School of Chemical EngineeringLiaoning Key Lab for Energy Materials and Chemical Engineering Dalian University of TechnologyDalian 116024China n.kolaev.In.titute of In.rgan.c Chemistry Siberian Branch of the Russian Academy of Sciences3 Acad.Lavrentiev Ave.Novosibirsk 630090Russia College of Chemical En.in.erin. Beijin. Un.v.rsity of Chemical Techn.logy Beijing 100029China

Metal-organ.c framework(MOF)-deriv.d carbon.composites hav. been.con.idered as the promisin. materials for en.rgy ***,the con.truction.of MOF-based composites with highly con.rollable mode v.a the liquid-liquid syn.hesis method has a great challen.e because of the simultan.ous heterogen.ous n.cleation.on.substrates an. the self-n.cleation.of in.iv.dual MOF n.n.crystals in.the liquid ***,we report a bidirection.l electrostatic gen.rated self-assembly strategy to achiev. the precisely con.rolled coatin.s of sin.le-layer n.n.scale MOFs on.a ran.e of substrates,in.ludin. carbon.n.n.tubes(Cn.s),graphen. oxide(GO),MXen.,layered double hydroxides(LDHs),MOFs,an. SiO_(2).The obtain.d MOF-based n.n.structured carbon.composite exhibits the hierarchical porosity(v.(meso)/v.(micro)∶2.4),ultrahigh n.con.en. of 12.4 at.%an."dual electrical con.uctiv. n.tworks."The assembled aqueous zin.-ion.hybrid capacitor(ZIC)with the prepared n.n.carbon.composite as a cathode shows a high specific capacitan.e of 236 F g^(-1)at 0.5 A g^(-1),great rate performan.e of 98 F g^(-1)at 100 A g^(-1),an. especially,an.ultralon. cyclin. stability up to 230000 cycles with the capacitan.e reten.ion.of 90.1%.This work dev.lops a repeatable an. gen.ral method for the con.rolled con.truction.of MOF coatin.s on.v.rious fun.tion.l substrates an. further fabricates carbon.composites for ZICs with ultrastability.

关键词： carbon.composite electrostatic in.eraction metal-organ.c framework coatin. self-assembly zin.-ion.hybrid capacitor

A multi-platform an.lysis of human.gin.iv.l crev.cular fluid rev.als ferroptosis as a relev.n. regulated cell death mechan.sm durin. the clin.cal progression.of periodon.itis

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In.ern.tion.l Journ.l of Oral Scien.e 2024年第2期16卷 265-279页

作者： Alfredo Torres M.An.élica Michea Ákos v.gv.ri Marion.Arce v.len.in. Pérez Marcela Alcota Alicia Morales Rolan.o v.rn.l Mauricio Budin. Roman.A.Zubarev.Fermín.E.Gon.ález Laboratory of Experimen.al Immun.logy&Can.er Faculty of DentistryUniversity of ChileSantiagoChile Departmen. of Con.erv.tiv. Den.istry Faculty of DentistryUniversity of ChileSantiagoChile Div.sion.of Chemistry I Department of Medical Biochemistry and BiophysicsKarolinska InstitutetStockholmSweden Periodon.al Biology Laboratory Faculty of DentistryUniversidad de ChileSantiagoChile Laboratory of Cellular an. Molecular Pathology Institute for Research in Dental SciencesFaculty of DentistryUniversity of ChileSantiagoChile

Ferroptosis is implicated in.the pathogen.sis of n.merous chron.c-in.lammatory diseases,yet its association.with progressiv. periodon.itis remain. *** in.0}stigate the in.0}lv.men. an. sign.fican.e of ferroptosis in.periodon.itis progression.we assessed sixteen.periodon.itis-diagn.sed *** progression.was clin.cally mon.tored ov.r twelv. weeks v.a weekly clin.cal ev.luation. an. gin.iv.l crev.cular fluid(GCF)collection.was performed for further *** metrics,proteomic data,in.silico methods,an. bioin.ormatics tools were combin.d to iden.ify protein.profiles lin.ed to periodon.itis progression.an. to explore their poten.ial con.ection.with *** western.blot an.lyses v.lidated key ***,a sin.le-cell Rn. sequen.in.(scRn.-seq)dataset(GSE164241)for gin.iv.l tissues was an.lyzed to elucidate cellular dyn.mics durin. periodon.itis *** progression.was iden.ified as occurrin. at a faster rate than.tradition.lly *** samples from progressin. an. n.n.progressin. periodon.al sites showed quan.itativ. an. qualitativ.ly distin.t proteomic *** addition.specific biological processes an. molecular fun.tion. durin. progressiv. periodon.itis were rev.aled an. a set of hub protein.,in.ludin. Sn.A,CA1,HBB,SLC4A1,an. An.1 was stron.ly associated with the clin.cal progression.status of ***,we foun. specific protein.-driv.rs or suppressors-associated with ferroptosis(Sn.A,FTH1,HSPB1,CD44,an. GCLC),rev.alin. the co-occurren.e of this specific type of regulated cell death durin. the clin.cal progression.of ***,the in.egration.of quan.itativ. proteomic data with scRn.-seq an.lysis suggested the susceptibility of fibroblasts to *** an.lyses rev.al protein. an. processes lin.ed to ferroptosis for the first time in.periodon.al patien.s,which offer n.w in.ights in.o the molecular mechan.sms of progressiv. periodon.al *** fin.in.s may le

关键词： fin.in. progression faster

En.rgy-efficien. join. UAv.secure commun.cation.an. 3D trajectory optimization.assisted by recon.igurable in.elligen. surfaces in.the presen.e of eav.sdroppers

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Defen.e Techn.logy（防务技术） 2024年第1期31卷 537-543页

作者： Huan. Hailon. Mohsen.Eskan.ari An.rey v.Sav.in.Wei n. The Departmen. of Aeron.utical an. Av.ation.En.in.erin. The Hong Kong Polytechnic UniversityHong KongChina School of Electrical En.in.erin. an. Telecommun.cation. University of New South WalesSydney2052Australia Data61 CSIROAustralia

We con.ider a scen.rio where an.un.an.ed aerial v.hicle(UAv.,a typical un.an.ed aerial system(UAS),tran.mits con.iden.ial data to a mov.n. groun. target in.the presen.e of multiple *** frien.ly recon.igurable in.elligen. surfaces(RISs) help to secure the UAv.target commun.cation.an. improv. the en.rgy efficien.y of the *** formulate an.optimization.problem to min.mize the en.rgy con.umption.of the UAv.subject to the mobility con.train. of the UAv.an. that the achiev.ble secrecy rate at the target is ov.r a giv.n.*** presen. an.on.in. plan.in. method followin. the framework of model predictiv. con.rol(MPC) to join.ly optimize the motion.of the UAv.an. the con.iguration. of the *** effectiv.n.ss of the proposed method is v.lidated v.a computer simulation..

关键词： Un.an.ed aerial systems(UASs) Un.an.ed aerial v.hicle(UAv. Commun.cation.security Eav.s-droppin. Recon.igurable in.elligen. surfaces(RIS) Auton.mous n.v.gation.an. placemen. Path plan.in. Model predictiv. con.rol

A n.v.l diurn.l an. season.l v.riation.an.lysis of BTEX in.Ben.aluru urban.area

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Research in.Cold an. Arid Region. 2024年第1期16卷 14-19页

作者： H.n.Sowmya M.Din.man. G.P.Shiv.shan.ara H.K.Ramaraju B.S.Suren.ra v.jaya v.Shan.hag R.Prajwal Departmen. of Civ.l En.in.erin. Dayananda Sagar College of EngineeringBangalore 560078India Departmen. of Chemistry Dayananda Sagar College of EngineeringBangalore 560078India Departmen. of Physics GFGCVijayanagarBengaluru 560040India

In.the urban.atmosphere of Ben.aluru, v.rious v.latile organ.c compoun.s(v.Cs), particularly Ben.en.,Toluen., Ethylben.en., an. Xylen.(BTEX), hav. shown.an.in.reasin. tren. in.con.en.ration. The presen. research was con.ucted durin. summer an. mon.oon.season., focusin. on.Kadubeesan.halli, a high-traffic area within.the Ben.aluru Metropolitan.City. Hourly sample data was collected usin. a BTEX an.lyzer(Model GC955-600) an. subsequen.ly tran.formed in.o daily, mon.hly, an. season.l v.lues. The study rev.aled distin.t pattern. in.ben.en. con.en.ration.. Ben.en. lev.ls were lowest durin. the early morn.n. hours, specifically from 1:00 *** 7:00 a.m.. Con.en.ration. then.in.reased from 7:00 a.m. to 9:00 a.m. an. again.from 4:00 p.m. to 11:00 p.m.,correspon.in. to the morn.n. an. ev.n.n. peak traffic hours. Howev.r, between.10:00 a.m. an. 4:00 p.m., the con.en.ration.decreased due to reduced traffic lev.ls. These diurn.l v.riation. in.ben.en. con.en.ration.are in.luen.ed by meteorological parameters. Comparin. the two season., higher con.en.ration. of Ben.en., EthylBen.en., an. MP-xylen. were observ.d durin. the summer season. This in.rease is attributed to the elev.ted temperatures durin. summer, which promote the v.porization.of BTEX compoun.s. Con.0}rsely, lower BTEX con.en.ration. were recorded durin. the mon.oon.season.due to the wet deposition.process. The observ.d positiv. correlation.r > 0.5) amon. BTEX parameters stron.ly suggests a common.source, most likely origin.tin. from v.hicular emission..

关键词： BTEX Summer v.riation Meteorological parameters Correlation

Computation.l study of flow separation.in.trun.ated ideal con.our n.zzles un.er high-altitude con.ition.

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International Journal of Fluid Engineering

In.ern.tion.l Journ.l of Fluid En.in.erin. 2024年第1期 21-30页

作者： Ijas Muhammed v.v.Shamsia Ban. n.Abhilash Suryan.v.n.en. Lijo Dav.d Simurda Heuy Don. Kim College of En.in.erin. Triv.n.rum Gov.rn.en. En.in.erin. College Thrissur Faculty of Mechan.cal En.in.erin. Technical University of Liberec An.on. n.tion.l Un.v.rsity

Flow separation.in.rocket n.zzles has been.studied mostly un.er sea-lev.l con.ition., which fail to take in.o accoun. chan.es in.ambien. den.ity an. ambien. pressure durin. the flight of a rocket. In.the presen. study, n.merical an.lysis is con.ucted of flow characteristics within.a trun.ated ideal con.our(TIC) n.zzle to in.0}stigate the in.luen.e of ambien. den.ity an. pressure on.flow separation. Six differen. altitudes from a typical flight are con.idered, from a v.ry low altitude to a high altitude. The flow is an.lyzed by v.ryin. the n.zzle pressure ratios correspon.in. to these altitudes. Both cold flow an. hot flow simulation. are con.ucted. The location. of separation.position. at v.rious altitude con.ition. are accurately captured an. are foun. to be in.good agreemen. with experimen.al results. The results of the study establish that for a giv.n.n.zzle pressure ratio, the flow separation.poin. is shifted upstream with in.reasin. altitude. This clearly poin.s to a depen.en.e of separation.position.on.the altitude of operation.for TIC rocket n.zzles.

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