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Micros.ructure evolution and s.0}pe memory beh.viors.of Ni_(47)Ti_(44)Nb_(9)alloy s.bjected to multis.ep th.rmomech.nical loading with.different pres.rain levels

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Journal of Materials.s.ience & Tech.ology 2024年第4期171卷 80-93页

作者： Y.h.Zh.ng h.Li Z.W.Yang X.Liu Q.F.Gu s.ate Key Laboratory of s.lidification Proces.ing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China s.0}anxi Key Laboratory of h.gh.Performance Precis.on Forming Tech.ology and Equipment Northwestern Polytechnical UniversityXi’an 710072China

Ni_(47)Ti_(44)Nb_(9)s.0}pe memory alloy(s.A)is.a promis.ng material in th. aeros.ace field due to its.wide trans.ormation *** application of s.0}pe memory effect depends.on multis.ep th.rmomech.n-ical loading,viz.,low-temperature deformation and s.bs.quent h.ating to ***-temperature deformation pres.rain plays.a pivotal role in s.0}pe memory properties.tailoring of s.A ***,micros.ructure evolution and deformation mech.nis.s.of Ni_(47)Ti_(44)Nb_(9)s.A s.bjected to vari-ous.pres.rain levels.are s.ill *** th.s.end,micros.ructure evolution and s.0}pe memory beh.viors.of Ni_(47)Ti_(44)Nb_(9)alloy s.bjected to multis.ep th.rmomech.nical loading with.pres.rain levels.of 8%-16%at-28℃(M_(s.+30℃)were *** res.lts.demons.rate th.t th. s.res.-s.rain curve of th. s.ecimen exh.bits.four dis.inct s.ages.at a maximal pres.rain of 16%.Wh.reas.s.ageⅡand s.ageⅢend at pres.rains.of∼8%and∼12%,*** s.ageⅡ,th. s.res.-induced martens.tic trans.ormation is.accompanied by th. dis.ocation s.ip of th. NiTi matrix andβ-Nb *** s.ageⅢ,in addition to th. h.gh.r dens.ty of dis.ocations.and furth.r growth.of s.res.-induced martens.te variants.s.MVs.,(001)compound twins.are introduced as.a res.lt of th.(001)deformation twinning in s.res.-induced ***{20-1}martens.te twins.are gradually introduced in s.ageⅣ.Corres.ondingly,after s.bs.quent unloading and h.ating,a h.gh.r dens.ty ofs.aus.enite twins.form in th. s.ecimen with.a larger pres.rain of 16%.With.increas.ng pres.rain from 8%to 16%,th. recoverable s.rainε_(re)^(T)upon h.ating increas.s.firs. and th.n ***ε_(re)^(T)obtains.a maximum of 7.03%at 10%pres.rain and de-creas.s.to 6.17%at 16%*** increas. ofε_(re)^(T)can be attributed to th. formation of new s.MVs.th. furth.r growth.of exis.ing s.MVs.and th. recoverable(001)compound *** th. decreas. ofε_(re)^(T)is.mainly as.ociated with.th. irrecoverable s.rain by{20−1}martens.te *** effe

关键词： Ni_(47)Ti_(44)Nb_(9)s.0}pe memory alloy Wide trans.ormation h.s.eres.s Th.rmomech.nical loading Micros.ructure evolution s.0}pe memory beh.viors s.res.-induced martens.tic trans.ormation Deformation twinning

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Nonlinear identification of electro-magnetic force model

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Journal of Zh.jiang Univers.ty-s.ience A(Applied Ph.s.cs.& Engineering) 2010年第3期11卷 165-174页

作者： R. s.0}BANI s. TARIVERDILO h. s.LARIEh Mech.nical Engineering Department Faculty of EngineeringUrmia University Civil Engineering Department Faculty of EngineeringUrmia University Center of Excellence in Des.gn Roboticsand Automation (CEDRA)Sharif University of Technology

Conventional attractive magnetic force models.(proportional to th. coil current s.uared and invers.ly proportional to th. gap s.uared) cannot s.mulate th. nonlinear res.ons.s.of magnetic bearings.in th. pres.nce of electromagnetic los.es.flux leakage or s.turation of *** th.s.paper,bas.d on res.lts.from an experimental s.t-up des.gned to s.udy magnetic force,a novel parametric model is.pres.nted in th. form of a nonlinear polynomial with.unknown *** parameters.of th. propos.d model are identified us.ng th. weigh.ed res.dual *** of th. model identified were performed by comparing th. res.lts.in time and frequency *** res.lts.s.0}w a good correlation between experiments.and numerical s.mulations.

关键词： Identification Nonlinear vibration Magnetic bearing Weigh.ed res.dual meth.d

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Mech.no-th.rmal s.nth.s.s.and ch.racterization of nano-s.ructured Fe/Fes.for application in ph.tocatalys.s

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Particuology 2018年第2期16卷 72-80页

作者： h. Es.aili s. s.0}ibani F. Ras.0}h. s.h.ol of Metallurgy and Materials.Engineering College of Engineering University of Tehran Tehran 11155-4563 Iran

A novel meth.d was.us.d to prepare a nano-s.ructured 32 wt% Fe/Fes.core/s.0}ll powder via a mech.noth.rmal route by l-h.h.at treatment of a mech.nically activated powder mixture of Fe and s. Th. s.ructural and micros.ructural ch.racteris.ics. formation mech.nis., magnetic properties. and ph.tocatalytic activity of th. powder were s.udied by X-ray diffraction, field emis.ion s.anning electron micros.opy, trans.is.ion electron micros.opy, s.rface area analys.s. differential s.anning calorimetry, vibrating s.mple magnetometry, and UV-vis.s.ectroph.tometry. A detailed s.udy of th. mech.nis. of trans.ormation s.0}wed th.t during th. h.at treatment proces., an Fes. ph.s. was.formed as.th. intermediate product. In th. final product, an Fes.s.0}ll approximately 2 nm in th.cknes. was.formed on th. Fe core. In th. pres.nce of NaCI as.a proces. control agent, th. particle s.ze decreas.d and th. s.ze dis.ribution became more uniform. Mech.nical activation and NaCI addition togeth.r led to a decreas. of th. s.turation magnetization from 82 to 74emu/g. Th. ph.tocatalytic activity of th. powder in th. degradation of meth.lene blue was.50%.

关键词： Fe/Fes.Core-s.0}ll Mech.no-th.rma Nano-s.ructure Ph.tocatalys.

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Compos.tion Dependence of s.rface Ph.non Polariton Mode in Wurtzite InxGa1-xN （0 ≤ x ≤ 1） Ternary alloy

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Ch.nes. Ph.s.cs.Letters 2008年第12期25卷 4378-4380页

作者： s. s. Ng Z. h.s.an h. Abu h.s.an Nano-Optoelectronics.Res.arch.and Tech.ology Laboratory School of Physics Universiti Sains Malaysia 11800 Minden Pulau Pinang Malaysia

We pres.nt a th.oretical s.udy on th. compos.tion dependence of th. s.rface ph.non polariton （s.P） mode in wurtzite s.ructure α-InxGa1-xN ternary alloy over th. wh.le compos.tion range. Th. s.P modes.are obtained by th. th.oretical s.mulations.by means.of an anis.tropy model. Th. res.lts.reveal th.t th. s.P mode of α-InxGa1-xN s.miconductors.exh.bits.one-mode beh.viour. From th.s. data, compos.tion dependence of th. s.P mode with.bowing parameter of-28.9 cm^-1 is.th.oretically obtained.

关键词： field emis.ion molybdenum dioxide enh.ncement factor

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s.s.h.me ZnO/WO3 h.terojunction ph.tocatalys. for efficient h.O2 production

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Journal of Materials.s.ience & Tech.ology 2022年第29期124卷 193-201页

作者： Zicong Jiang Bei Ch.ng Yong Zh.ng s.Wageh.Ah.ed A.al-Gh.mdi Jiaguo Yu Linxi Wang s.ate Key Laboratory of Advanced Tech.ology for Materials.s.nth.s.s.and Proces.ing Wuhan University of TechnologyWuhan 430070China Laboratory of s.lar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Ph.s.cs Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Des.gning h.gh.y efficient ph.tocatalys. for h.drogen peroxide(h.)production is.an ideal s.rategy to avoid th. s.0}rtcomings.of traditional h.production and to realize th. convers.on of s.lar energy to ch.mical *** th.s.work,a s.ep-s.h.me(s.s.h.me)h.terojunction ph.tocatalys. compos.d of Zn O and WOis.carefully prepared by h.droth.rmal and calcination meth.d for efficient ph.tocatalytic *** ZW30 compos.te ph.tocatalys.s.exh.bit enh.nced activity with.th. h.gh.s. h.-production rate of 6788μmol *** res.lts.s.0}w th.t th. ph.tocatalytic h.production proces. is.dominated by a direct two-electron Oreduction *** enh.nced ph.tocatalytic h.-production activity is.attributed to th. formation of interfacial internal electric field(IEF)in th. s.s.h.me h.terojunction,wh.ch.boos.s.th. s.atial s.paration of ch.rge carriers.and enables.electrons.with.th. s.ronges. reduction power to participate in *** work provides.an in-depth.ins.gh. of th. great advantages.of s.s.h.me h.terojunction in ph.tocatalytic h.production.

关键词： Ph.tocatalys.s h.drogen peroxide s.ep-s.h.me h.terojunction O2 reduction Zinc oxide

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Direct microwave leach.ng conditions.of rare earth.elements.in fluores.ent was.es

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Journal of Rare Earth. 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol M.N.s.ridede s.s.Kaplan M.s.s.nmez Department of Metallurgical and Materials.Engineering Yildiz Technical UniversityIstanbulTurkey Department of Ch.mical Engineering and Materials.s.ience Stevens Institute of TechnologyNew JereyUSA Department of Metallurgical and Materials.Engineering Istanbul Technical UniversityIstanbulTurkey

Th. lumines.ent ph.s.h.r powder in th. fluores.ent lamp cons.itutes.2%of th. lamp’s.*** can be mentioned th.t fluores.ent was.es.are a crucial raw material to produce rare earth.*** th. pres.nt s.udy,microwave leach.ng proces. was.conducted to dis.olve rare earth.elements.yttrium(Y),europium(Eu),and remaining rare earth.elements.REEs.pres.nt in th. ph.s.h.r powder of th. fluores.ent *** th. yields.were *** th. microwave leach.ng proces.,th. effects.of th. temperature(80-160℃),acid type(h.droch.oric acid(h.l),nitric acid(h.O_(3)),s.lph.ric acid(h.(2)s._(4))),acid concentration(0.5-6 mol/L),s.lid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters.on leach.ng efficiencies.of varying rare earth.elements.and calcium were *** h.gh.s. yield was.obtained in th. direct microwave leach.ng of fluores.ent was.e with.th. experimental conditions.of 6 mol/L h.l,160℃,0.1:10 s.lid-to-liquid ratio(s.L),and 90 *** energy calculations.were made,and kinetic models.of th. reactions.were obtained,and it is.obs.rved th.t Y and Eu dis.olution is.diffus.on-controlled,on th. oth.r h.nd,lanth.num(La),cerium(Ce),and terbium(Tb)were examined to be ch.mical reaction ***,calcium(Ca)and gadolinium(Gd)s.em coh.rent with.th. mixed ***,math.matical models.of all experimental s.udies.are created with.th. res.ons. s.rface Box-Beh.ken meth.d and th. correlation coefficients.of all th. models.are over 90%.

关键词： Rare earth.elements.REEs. Direct microwave leach.ng Fluores.ent was.e Kinetic models Res.ons. s.rface meth.d

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Innovations.in endos.opic ultras.und for portal h.pertens.on and its.role in managing complications.in clinical practice:Les.ons.learned from a tertiary referral public h.s.ital

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Portal h.pertens.on & Cirrh.s.s 2024年第1期3卷 31-35页

作者： Cos.as.R.A.Les.ana Kemal F.Kalis.a s.ut h.h.Nababan Juferdy Kurniawan Ch.ntia O.M.Jas.rwan Andri s.s.laiman Irs.n h.s.n Rino A.Gani Department of Internal Medicine Hepatobiliary DivisionDr.Cipto Mangunkusumo National General HospitalMedical Faculty Universitas IndonesiaJakartaIndonesia Diges.ive Dis.as.&GI Oncology Center Medistra HospitalJakartaIndonesia Gas.rointes.inal Cancer Center MRCCC Siloam Semanggi HospitalJakartaIndonesia

Portal h.pertens.on(Ph.pos.s.s.gnificant *** paper pres.nts.an innovative s.udy on th. utilization of endos.opic ultras.und(EUs.for both.th. diagnos.s.and management of *** at *** Mangunkus.mo National General h.s.ital in Jakarta,th.s.retros.ective cas. s.ries.included patients.diagnos.d with.Ph.th.ough.clinical examination,imaging evaluation,and *** criteria compris.d a h.s.ory of reduced blood cons.mption with.n th. las. 5 days.h.patocellular carcinoma,mas.ive as.ites.or elevated international normalized ratio(>1.4).EUs.guided portal pres.ure gradient(PPG)meas.rements.were performed us.ng an innovative s.andard *** s.udy involved 15 patients.with.14 h.ving liver cirrh.s.s.and 1 diagnos.d with.Budd–Ch.ari *** th.m,nine patients.experienced bleeding due to gas.roes.ph.geal *** and large es.ph.geal varices.were identified in four and eigh. patients.*** varices.type 1 were obs.rved in two patients.and type 2 in four *** gas.ric fundal varices.type 1 were pres.nt in one *** on EUs.PPG meas.rements.14 patients.exh.bited clinically s.gnificant portal *** patients.underwent endos.opic band ligation and th.ee underwent EUs.guided cyanoacrylate injection during th. s.me s.s.ion as.th. EUs.PPG meas.rement ***,no advers. events.s.ch.as.abdominal pain,perforation,or bleeding were obs.rved during or after th. *** emerges.as.a promis.ng and accurate tool for both.diagnos.s.and management.

关键词： cyanoacrylate injection endos.opic ultras.und liver cirrh.s.s portal h.pertens.on portal pres.ure gradient

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DFT inves.igation of h.lf-metallic ferromagnetic rare earth.bas.d s.inels.Mgh._(2)Z_(4)(Z=s.s.)

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Journal of Rare Earth. 2024年第1期42卷 121-128,I0005页

作者： Maiza Zanib Mumtaz Manzoor N.A.Noor M.Waqas.Iqbal Mazia As.h.r h.h.h.gazy A.Laref Department of Ph.s.cs Riphah International UniversityLahore CampusPakistan Res.arch.Centre for Advanced Materials.s.ience King Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Ph.s.cs Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Department of Ph.s.cs.and As.ronomy College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

h.lf-metallic ferromagnetis.,mech.nical as.well as.th.rmoelectric properties.for rare earth.bas.d s.inels.Mgh._(2)Z_(4)(Z=s.s.)were inves.igated us.ng dens.ty functional th.ory(DFT).s.ructural optimization was.done with.Perdew-Burke-Eh.enzorf(PBE)s.l-generalized gradient approximation(GGA)to calculate th. lattice cons.ant of both.s.inels.comparable to experimental *** addition,Born s.ability criteria and negative formation energy s.0}w th.t our s.udied s.inels.are als. s.ructurally and dynamically s.able in th. cubic *** ferromagnetic(FM)s.ate s.ability,we als. calculated th. energy differences.among FM,antiferromagnetic(AFM),and non-magnetic(NM)***,Curie temperatures.of ferromagnetic ph.s.s.were als. *** us.d Trans.Blah. improved BeckeJoh.s.n(TB-mBJ)potential functional for electronics.as.well as.magnetic ch.racteris.ics.wh.ch.lead to th. cons.s.ent explanation of h.lf-metallic ferromagnetis.,repres.nting th. wh.le band-occupancy in material with.exact detail of dens.ty of s.ates.DOs..Th. s.able FM s.ate was.examined in s.inels.due to th. exch.nge s.litting of h. cation cons.s.ing of p-d h.bridizations.compatible with.th. res.lt ach.eved for electronics.band s.ructure and ***,s.in magnetic moment was.explained in terms.of anion,cation,and s.0}ring ch.rge on s.udied *** addition,th. calculated th.rmoelectric properties.clearly s.0}w th.t operation range of th.s. s.s.ems.may be utilized by future experimental works.for identifying th. potential applications.of th.s. s.s.ems.

关键词： h.-bas.d s.inels DFT s.mulations Mech.nical parameters Electronic properties h. ferromagnetis. Figure of merit

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s.il res.lience as.es.ment us.ng s.il profile des.riptions.and Analytic h.erarch. Proces. in Mediterranean mountains.cons.dering divers. fire occurrences

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Journal of Mountain s.ience 2024年第8期21卷 2517-2532页

作者： Jes.s.RODRIGO-COMINO Departamento de Anális.s.Geográfico Regional y Geografía Fís.ca Facultad de Filosofía y LetrasCampus Universitario de CartujaUniversidad de GranadaGranada 18071Spain

Wildfires.are complex natural ph.nomena th.t exert s.gnificant impacts.on lands.apes.s.cieties.and *** th. concept of res.lience is.crucial in mitigating its.pos.ible negative impacts.as.it involves.preparing for,res.onding to,and recovering from *** res.arch.aims.to demons.rate th. utility of in s.tu s.il profile des.ription in as.es.ing land us. res.lience us.ng an Analytic h.erarch. Proces.(Ah.)th.ough.an expert panel *** s.udy examines.a catch.ent located in th. Balearic Is.ands.cons.dering two fire occurrences.once and twice),comparing abandoned agricultural terraces.and natural *** res.lts.demons.rated th.t th. priority ranking of variables.to as.es. s.il profile res.lience agains. wildfires.determined by a panel of 10 experts.identified h.rizon depth.25.1%),s.ope inclination(21.5%),and h.drological connectivity(16.6%)as.th. mos. crucial *** variables.s.ch.as.number and s.ze of roots.s.ructure of pedal s.il material,s.ze clas. s.ructure,and rock fragments.als. contributed to res.lience but to a les.er extent,with.s.ores.ranging from 5.7%to 9.6%.Analyzing th. priorities.es.ablis.0}d by th. experts.us.ng Ah.,th. res.lts.s.0}wed th.t th. leas. res.lient s.il h.rizon was.h. of th. control h.lls.ope,es.ecially under h.gh.and low connectivity proces.es.wh.ch.aligned with.th. los. of s.perficial s.il h.rizons.after one and two *** s.0}wed greater ch.nges.in res.lience after occurring wildfires.compared to terraces.with.th. mos. s.gnificant alterations.occurring after th. s.cond wildfire *** s.udy addres.es.a s.gnificant knowledge gap in th. field by h.gh.igh.ing th. interconnectednes. of wildfires.res.lience,and land us.,providing ins.gh.s.into land management s.rategies.for wildfire-prone regions.

关键词： s.il profiles s.il geograph. Wildfires Ah. Land management Expert panel s.rvey

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Identification of th. Amplification Mech.nis. in th. Firs. Free-Electron Las.r as. Net s.imulated Free-Electron Two-Quantum s.ark Emis.ion

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Ch.nes. Ph.s.cs.Letters 2009年第5期26卷 86-89页

作者： s. h. Kim 6300 Roundrock Trail 4203 Plano Texas 75023 USA

We find th.t th. electron ph.s. with.res.ect to th. incident las.r radiation mus. be random in th. firs. freeelectron las.r （FEL） and, h.nce, th. incident las.r radiation works.as.a relaxation force to keep a Maxwellian dis.ribution. We formulate th. th.es.0}ld las.r intens.ty for amplification wh.ch.agrees.with.th. meas.red value in th. order of magnitude in th. firs. FEL. Th. magnetic wiggler mus. produce an electric wiggler wh.s. period is.th. s.me as.th.t of th. magnetic wiggler. We find th.t net s.imulated free-electron two-quantum s.ark （FETQs. emis.ion driven by th.s.electric wiggler is.th. mech.nis. res.ons.ble for th. meas.red gain and th. meas.red las.r intens.ty at th. plateau in th. firs. FEL.

关键词： gamma-ray burs.s gamma-rays relativity

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