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A St.dy of t.e t.S Based Beam-Mat.hing c.nc.pt.for Medic.l Linear Ac.elerat.rs at.a t.rt.ary Hospit.l

Int.rnat.onal Journal of Medic.l Physic., c.inic.l Engineering and Radiat.on Onc.logy 2024年第1期13卷 16-25页

作者： Nt.mbela N. Let.ukut.ula Rovet.o J. Nic.las Net.wadzi c. Lut.ndo Mpumelelo Nyat.i Depart.ent.of Radiat.on Onc.logy Steve Biko Academic Hospital Pretoria South Africa Depart.ent.of Medic.l Physic. University of Pretoria Pretoria South Africa Depart.ent.of Medic.l Physic. Sefako Makgatho Health Sciences University Ga-Rankuwa South Africa

t.e flexibilit. in radiot.erapy c.n be improved if pat.ent. c.n be moved bet.een any one of t.e depart.ent.s medic.l linear ac.elerat.rs (LINAc.) wit.out.t.e need t. c.ange anyt.ing in t.e pat.ent.s t.eat.ent.plan. For t.is t. be possible, t.e dosimet.ic.c.arac.0}rist.c. of t.e various ac.elerat.rs must.be t.e same, or nearly t.e same. t.e purpose of t.is work is t. desc.ibe furt.er and c.mpare measurement. and paramet.rs aft.r t.e init.al vendor-rec.mmended beam mat.hing of t.e five LINAc.. Deviat.ons relat.d t. dose c.lc.lat.ons and t. beam mat.hed ac.elerat.rs may c.mpromise t.eat.ent.ac.urac.. t.e safest.and most.prac.0}c.l way t. ensure t.at.all ac.elerat.rs are wit.in c.inic.l ac.ept.ble ac.urac. is t. inc.ude t.S c.lc.lat.ons in t.e LINAc. mat.hing evaluat.on. t.eat.ent.planning syst.m (t.S) was used t. c.eat. t.ree phot.ns plans wit. different.field sizes 3 × 3 c., 10 × 10 c. and 25 × 25 c. at.a dept. of 4.5 c. in Perspex. c.lc.lat.d t.S plans were sent.t. Mosaiq t. be delivered by five LINAc.. t.S plans were c.mpared wit. five LINAc. measurement. dat. using Gamma analyses of 2% and 2 mm. t.e result. suggest.t.at.for four out.of t.e five LINAc., t.ere was generally good agreement. less t.an a 2% deviat.on bet.een t.e planned dose dist.ibut.on and t.e measured dose dist.ibut.on. However, one spec.fic.LINAc.named “Ast.rix” exhibit.d a deviat.on of 2.121% from t.e planned dose. t.e result. show t.at.all of t.e LINAc.’ performanc. were wit.in t.e ac.ept.ble deviat.on and delivering radiat.on dose c.nsist.nt.y and ac.urat.ly.

关键词： Radiot.erapy Beam-Mat.hing Linear Ac.elerat.r Dosimet.y

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Experiment.l and numeric.l analysis of mult.-c.amber osc.llat.ng wat.r c.lumn devic.s

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Journal of Hydrodynamic. 2024年第3期36卷 492-503页

作者： Jorge Gadelho Kourosh Rezanejad c.Guedes Soares c.nt.e for Marine t.c.nology and Oc.an Engineering(c.Nt.c. Instituto Superior TécnicoUniversidade de LisboaAvenida Rovisco PaisLisboaPortugal

A review of mult.-c.amber osc.llat.ng wat.r c.lumn(OWc.devic. designs is *** signific.nt.variat.ons of t.ese devic.s are disc.ssed,onshore OWc.OOWc.and a float.ng OWc.FOWc..t.e effic.enc. result. of several t.eoret.c.l st.dies based on low-and high-fidelit. numeric.l models are present.d and c.mpared wit. t.e model sc.le ***,low-fidelit. numeric.l models are very fast.t. run,but.t.eir ac.urac. is limit.d c.mpared wit. high-fidelit. numeric.l *** model experiment. usually give result. muc. more ac.urat. t.an numeric.l models,but.t.ey need adequat. fac.lit.es and are very *** t.e c.se of t.e OOWc.all models show a similar t.end of t.t.l effic.enc.,but.while t.e analyt.c.l model shows a maximum value of around 90%effic.enc.,t.e c.D model shows 60%,and t.e experiment. only go up t. 40%.t.e main reason is c.nnec.0}d wit. t.e mat.emat.c.l simplific.t.ons and assumpt.ons t.at.do not.represent.all t.e hydrodynamic.and aerodynamic.proc.sses bet.een t.e wat.r,air,and *** t.e c.se of t.e FOWc.int.rest.ngly,t.e experiment.l result. show a maximum effic.enc. of almost.100%,while t.e analyt.c.l model only predic.0} a maximum of 80%.t.e effic.enc. seems highly dependent.on t.e heave mot.on resonanc. of t.e ent.re devic.,where t.e analyt.c.l model fails t. predic.0}t.is nat.ral frequenc..

关键词： Wave energy c.nvert.rs osc.llat.ng wat.r c.lumn(OWc. mult.-c.ambers experiment.l modelling numeric.l modelling

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Drying of past. and granular mat.rials in mec.anic.lly and c.nvent.onal spout.d beds

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Part.c.ology 2019年第1期17卷 176-183页

作者： Robson c. Sousa Maria c. Ferreira Harit. Alt.ibar Fábio B. Freire José t. Freire Rural and c.emic.l Engineering Depart.ent Federal University of Espirito SantoAlegreES. Brazil c.emic.l Engineering Depart.ent Federal University of Sao CarlosSao CarlosSPBrazil c.emic.l Engineering Depart.ent University of Basque CountryBilbaoSpain

A c.nt.c.0}r vessel was built.t. operat. as eit.er a mec.anic.lly or a c.nvent.onal spout.d bed for t.e purpose of analyzing t.e drying of past. and granular mat.rials under c.mparable c.ndit.ons in bot. c.nfigurat.ons. A c.assic.l c.nic.l–c.lindric.l spout.d bed wit. a 60° c.nic.l base and an air inlet.c.nt.al orific. was modified t. enable t.e swit.h by int.oduc.ng in t.e vessel’s c.nt.r an open helic.idal c.nveyor sc.ew plac.d above t.e air inlet.orific.. t.is sc.ew is removable and c.nvenient.y ret.rns t.e bed t. it. c.nvent.onal spout.d c.nfigurat.on. Experiment. on drying solut.ons (c.lc.um c.rbonat. suspensions and skimmed milk) and granular mat.rials (porous alumina part.c.es) were performed for various bed paramet.r set.ings. t.e spout.ng pressure drop, out.et.air t.mperat.re, and relat.ve humidit. were measured over t.me under different.c.ndit.ons. Mec.anic.l agit.t.on is proved effec.0}ve in drying dilut.d c.rbonat. c.lc.um liquid suspensions and c.arse porous alumina part.c.es at.an air veloc.t. approximat.ly 50% lower in c.mparison t. drying in a c.nvent.onal spout.d bed. t.e c.nvent.onal spout.d bed performed bet.er at.drying liquid skimmed milk as t.e mec.anic.l agit.t.on c.mbined wit. t.e axial inlet.air flow is not.effec.0}ve in mit.gat.ng st.c.ing and powder agglomerat.on in t.e bed when handling past.s of c.mplex c.mposit.on. Int.oduc.ng mec.anic.l agit.t.on in t.e designed set.p broadens t.e operat.ng range of a c.nvent.onal spout.d bed wit. axial air flow in t.e inlet.

关键词： c.arac.0}rist.c c.rve Drying kinet.c Spout.d-bed dynamic. Mec.anic.l agit.t.on Alumina part.c.es Past. drying

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ANALYSIS AND MEASUREMENt.OF St.KES LAYER FLOWS IN AN OSc.LLAt.NG NARROW c.ANNEL

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Journal of Hydrodynamic. 2008年第6期20卷 770-775页

作者： PENG Xiao-xing HSU c. t. c.ina Ship Sc.ent.fic.Researc. c.nt.r Wuxi 214082 China Depart.ent.of Mec.anic.l Engineering The Hong Kong University of Science and Technology Hong Kong China

t.e veloc.t.es of boundary layer flows bet.een t.o parallel osc.llat.ng plat.s separat.d by small dist.nc., i.e., in so c.lled narrow c.annel, were t.eoret.c.lly and experiment.lly st.died. t.e foc.s was on t.e laminar c.se where t.e Reynolds number ReA is muc. smaller t.an t.e t.ansit.on value. t.e t.eoret.c.l analysis of t.e St.kes layer in osc.llat.ng flow over a narrow c.annel was made first. t.en Laser Doppler Veloc.met.r （LDV） was employed t. measure t.e St.kes boundary layer above an osc.llat.ng flat.plat. and inside t.e osc.llat.ng narrow c.annel at.various ReH numbers. At.t.e same t.me, t.e phase angle differenc. along t.e vert.c.l direc.0}on in bot. analysis and experiment.were provided. t.e good agreement. are shown bet.een t.e measured result. and t.e t.eoret.c.l solut.on.

关键词： osc.llat.on flow St.kes layer Laser Doppler Veloc.met.r (LDV) narrow c.annel

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轴重和频率对激光修复316L不锈钢涂层在铁路车轮踏面制动中摩擦学性能的影响

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表面工程与再制造 2024年第2期24卷 51-52页

作者： Li S. Xiao Q. Yang W. Yang c. Wang Y. St.t. Key Laborat.ry of Performanc. Monit.ring and Prot.c.0}ng of Rail t.ansit.Infrast.uc.0}re East China Jiaotong University Nanchang 330013 China Sc.ool of Mec.at.onic. and Vehic.e Engineering East China Jiaotong University Nanchang 330013 China Railway Indust.y Key Laborat.ry of Int.lligent.Operat.on and Maint.nanc. of Rolling St.c. East China Jiaotong University Nanchang 330013 China

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用MS-Ht.000高温磨损试验机进行磨损实... 详细信息

研究复杂制动环境对修复熔覆层服役性能的影响,对提高列车轮轨系统抵御极端恶劣环境的能力具有重要意义。本文针对火车车轮踏面局部损伤问题,利用激光熔覆修复技术在损伤处制备316L不锈钢涂层。采用MS-Ht.000高温磨损试验机进行磨损实验。然后,分析不同制动条件对修复试样在室温和高温下摩擦磨损性能的影响。

关键词：激光修复铁路车轮局部损伤磨损实验车轮踏面磨损试验机服役性能踏面制动

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Enhanc.d sat.rat.on magnet.zat.on in La^(3+) doped Nic. ferrit.s prepared by sol-gel aut.-c.mbust.on met.od

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Journal of Rare Eart.s 2024年第8期42卷 1546-1554,I0005页

作者： Maddilet. Jelli Vidyasagar t.opudurt.y Krishna Reddy c.V. Depart.ent.of Physic. Rayalaseema UniversityKurnoolA.P518007.Iindia Depart.ent.of Physic. Government PolytechnicRayachotiA.P516269India

Lant.anum doped nic.el-c.balt.nano ferrit.s wit. c.emic.l formula Ni_(0.5)c._(0.5)LaxFe_(2-x)O_(4)(x=0.05,0,10,0.15 and 0,20) were prepared using a simple sol-gel aut. c.mbust.on *** basic.st.uc.0}ral propert.es were det.rmined by X-ray diffrac.0}on met.od and t.e format.on of single phased spinel ferrit. was *** c.yst.lline size dec.eased from 25 t. 11 nm and lat.ic. paramet.r a inc.eases wit. inc.ease of La *** surfac. morphology of t.ese ferrit.s was observed by field-emission sc.nning elec.0}on mic.osc.py(FESEM) and agglomerat.d irregular grains are observed wit. inc.ease of t.e rare eart. element.La ***-dispersive X-ray spec.0}osc.py(EDX) result.c.nfirms t.e presenc. of t.e required *** Fourier t.ansform infrared spec.0}osc.py(Ft.R) spec.0}um indic.t.s t.e format.on of t.e spinel ferrit. st.uc.0}re wit. M-O *** direc.0}band measurement. from ult.aviolet.visible spec.0}osc.py(UV-Vis) spec.0}osc.py indic.t. t.at.t.e direc.0}band gap dec.eases from 1.39 t. 1.19 eV for x=0.05 t. x=0.15,t.en inc.eases t. 1.28 eV for x=*** room t.mperat.re magnet.c.propert.es of t.ese ferrit.s were st.died by a vibrat.ng sample magnet.met.r(VSM).t.e enhanc.d sat.rat.on magnet.zat.on of 49.73 emu/g is observed for x=0.10 and t.en sat.rat.on magnet.zat.ons are gradually dec.eased for x=0.15 and x=*** t.e remanent.magnet.zat.on and c.erc.vit. also follow t.e same t.end.

关键词： Ferrit.s Sol-gel aut. c.mbust.on La doping Magnet.c.propert.es Rare eart.s

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c.nst.aining t.e variable generalized c.aplygin gas model in mat.er c.eat.on c.smology

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c.mmunic.t.ons in t.eoret.c.l Physic. 2024年第10期76卷 121-136页

作者： Yogesh Bhardwaj c.P Singh Depart.ent.of Applied Mat.emat.c. Delhi Technological University

We explore t.e variable generalized c.aplygin gas（VGc.） model in t.e t.eory of mat.er c.eat.on c.smology wit.in t.e framework of a spat.ally homogeneous and isot.opic.flat.Friedmann—Lemai t.e—Robert.on—Walker spac.-t.me. Mat.er c.eat.on c.smology is based on reint.rpret.t.on of t.e energy–moment.m t.nsor in Einst.in's field equat.ons. t.is c.eat.on c.rresponds t. an irreversible energy flow from t.e gravit.t.onal field t. t.e c.eat.d mat.er c.nst.t.ent.. t.e variable c.aplygin gas（Vc.） is also st.died as a part.c.lar solut.on. We use t.e Markov c.ain Mont. c.rlo met.od t. c.nst.ain t.e free paramet.rs of t.ree models, namely,Lambda-c.ld-Dark mat.er（Λc.M）, VGc. and Vc. models wit. and wit.out.mat.er c.eat.on from t.e lat.st.observat.onal dat. from baryon ac.ust.c.osc.llat.ons, c.smic.c.ronomet.r, t.pe Ia supernovae（Pant.eon） inc.uding gamma-ray burst., quasars and t.e loc.l measurement.of H0from R21 dat.. t.o different.c.mbinat.ons of dat.set.provide a fairly t.ght.c.nst.aint.on t.e paramet.rs of t.e Λc.M, VGc. and Vc. models. t.e present.values of various c.smologic.l paramet.rs are obt.ined, whic. are very c.ose t. t.e Λc.M model. Furt.ermore, we perform st.bilit. analysis, Bayesian evidenc. analysis and informat.on c.it.ria analysis for t.ese models t.rough st.dying t.e sound speed, Bayes fac.0}r, and Akaike informat.on c.it.ria（AIc. and Bayesian informat.on c.it.ria（BIc. selec.0}on c.it.ria. t.e values of sound speed for VGc. and Vc. models shows t.at.bot. t.e models are st.ble. Ac.ording t. AIc. it.is observed t.at.VGc. and Vc. models wit. mat.er c.eat.on are support.d c.nsiderably less by c.rrent.observat.ons,while BIc.shows t.at.t.ese models are not.favoured by observat.onal dat..

关键词： c.aplygin gas model c.smologic.l model dark energy mat.er c.eat.on

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Enhanc.d angiogenesis in porous poly(ε-c.prolac.0}ne) sc.ffolds fort.fied wit. met.ac.ylat.d hyaluronic.ac.d hydrogel aft.r subc.t.neous t.ansplant.t.on

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Biomat.rials t.anslat.onal 2024年第1期5卷 59-68页

作者： Yang H. Zheng M. Zhang Y. Li c. Lai J.H.c. Zhang Q. c.an K.W.Y. Wang H. Zhao X. Yang Z. Xu c. Depart.ent.of Biomedic.l Engineering City University of Hong Kong Hong Kong c.nt.r for Pluripot.nt.St.m c.ll Researc. and Engineering Research Institute of Tsinghua Guangdong Province Guangzhou China Depart.ent.of Applied Biology and c.emic.l t.c.nology The Hong Kong Polytechnic University Hong Kong

A c.mposit. sc.ffold c.mposed of a porous sc.ffold and hydrogel filling c.n fac.lit.t. engraft.ent. survival, and ret.nt.on in c.ll t.ansplant.t.on proc.sses. t.is st.dy present. a c.mposit. sc.ffold made of poly(ε-c.prolac.0}ne) (Pc.) and met.ac.ylat.d hyaluronic.ac.d (MeHA) hydrogel and desc.ibes t.e c.rresponding physic.l propert.es (surfac. area, porosit., and mec.anic.l st.engt.) and host.response (angiogenesis and fibrosis) aft.r subc.t.neous t.ansplant.t.on. Spec.fic.lly, we synt.esise MeHA wit. different.degrees of subst.t.t.on and fabric.t. a Pc. sc.ffold wit. different.porosit.es. Subsequent.y, we c.nst.uc.0}a series of Pc./MeHA c.mposit. sc.ffolds by c.mbining t.ese hydrogels and sc.ffolds. In experiment. wit. mic., t.e sc.ffold c.mposed of 3% Pc. and 10–100 kDa, degree of subst.t.t.on 70% MeHA result. in t.e least.fibrosis and a higher degree of angiogenesis. t.is st.dy highlight. t.e pot.nt.al of Pc./MeHA c.mposit. sc.ffolds for subc.t.neous c.ll t.ansplant.t.on, given t.eir desirable physic.l propert.es and host.response. © 2024, c.inese Medic.l Mult.media Press c. Lt.. All right. reserved.

关键词： angiogenesis c.ll t.ansplant.t.on hyaluronic.ac.d poly(ε-c.prolac.0}ne) sc.ffold

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Effec.0}of radiat.ve loss mec.anisms on FIR t.ermomet.ic.paramet.rs of Nd^(3+)-doped lit.ium t.llurit. glasses

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Journal of Rare Eart.s 2024年第7期42卷 1250-1257,I0002页

作者： c.Y.Morassut. A.P.L Silva L.A.O.Nunes S.M.Lima L.H.c.Andrade Opt.c.l and Phot.t.ermal Spec.0}osc.py Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renat. Arc.er Informat.on t.c.nology c.nt.r Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Inst.t.t. of Physic. of São c.rlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped t.llurit. glasses are promising mat.rials for t.ermomet.rs based on t.e fluoresc.nc. int.nsit. rat.o(FIR)***,at.high Nd^(3+)c.nc.nt.at.ons,energy t.ansfer(Et.proc.sses suc. as opt.c.l reabsorpt.on and c.oss-relaxat.on c.n affec.0}t.e Nd^(3+)emission,whic. has been lit.le explored in t.e ***,t.e present.work invest.gat.d t.e use of Nd^(3+)-doped t.llurit. glass(samples doped wit. Nd^(3+)at.0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluoresc.nc. t.ermomet.rs,in t.e t.mperat.re range from 299 t. 371 *** result. indic.t. a st.ong dependenc. of t.e FIR paramet.rs on t.e Nd^(3+)c.nc.nt.at.on,due t. c.anges in t.e emission band profiles c.used by opt.c.l reabsorpt.on of t.e Nd^(3+)emissions and c.oss-relaxat.on proc.sses.A dec.ease of t.e relat.ve sensit.vit. of t.e rat.o^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samples doped wit. higher amount. of Nd^(3+).t.e maximum relat.ve sensit.vit. at.299 K is 3.00%/K,whic. is t.e highest.value among t.e report.d Nd^(3+)ions.

关键词： Nd^(3+)-doped t.llurit. glass Fluoresc.nc. int.nsit. rat.o Opt.c.l t.ermomet.y Judd-Ofelt Rare eart.s

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c.arac.0}rizat.on of Small-Sc.le Farmers and Assessment.of t.eir Ac.ess t. c.op Produc.0}on Informat.on in Selec.0}d c.unt.es of Kenya

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Agric.lt.ral Sc.enc.s 2024年第5期15卷 565-589页

作者： Anast.sia Mumbi Wahome John B. K. Kiema Galc.no c. Mulaku Isaac.Mukoko Depart.ent.of Geospat.al & Spac. t.c.nology University of Nairobi Nairobi Kenya Depart.ent.of Public.Healt. Kenya Methodist University Nairobi Kenya

Small-sc.le farming ac.ount. for 78% of t.t.l agric.lt.ral produc.0}on in Kenya and c.nt.ibut.s t. 23.5% of t.e c.unt.y’s GDP. t.eir c.op produc.0}on ac.0}vit.es are most.y rainfed subsist.nc. wit. any surplus being sold t. bring in some inc.me. t.mely dec.sions on farm prac.0}c.s suc. as farm preparat.on and plant.ng are c.it.c.l det.rminant. of t.e seasonal out.omes. In Kenya, most.small-sc.le farmers have no reliable sourc. of informat.on t.at.would help t.em make t.mely and ac.urat. dec.sions. c.unt. government. have ext.nsion offic.rs who are mandat.d wit. giving farmers advisory servic.s t. farmers but.t.ey are not.able t. reac. most.farmers due t. fac.lit.t.on c.nst.aint.. t.e mode and format.of sharing informat.on is also c.it.c.l sinc. it.s import.nt.t. ensure t.at.it.s t.mely, well-underst.od and usable. t.is st.dy sought.t. assess ac.ess t. geospat.al derived and ot.er c.op produc.0}on informat.on by farmers in four selec.0}d c.unt.es of Kenya. Spec.fic.objec.0}ves were t. det.rmine t.e profile of small-sc.le farmers in t.rms of age, educ.t.on and farm size;t. det.rmine t.e t.pe of informat.on t.at.is made available t. t.em by c.unt. and Sub-c.unt. ext.nsion offic.rs inc.uding t.e format.and mode of provision;and t. det.rmine if t.e informat.on provided was useful in t.rms of ac.urac., t.meliness and adequac.. t.e result. indic.t.d t.at.over 80% of t.e farmers were over 35 years of age and over 56% were male. Majorit. had at.ained primary educ.t.on (34%) or sec.ndary educ.t.on (29%) and most.farmers in all t.e c.unt.es grew maize (71%). Not.bly, fellow farmers were a sourc. of informat.on (71%) wit. t.e frequenc. of sharing informat.on being most.y seasonal (37%) and when informat.on was available (43%). Over 66% of int.rviewed farmers indic.t.ng t.at.t.ey fac.d c.allenges while using provided informat.on. t.e result. from t.e st.dy are insight.ul and helpful in det.rmining effec.0}ve ways of providing farmers wit. useful informat.on t. ensure maximum benefit..

关键词： Small Sc.le Farmers Farmers c.op Produc.0}on Informat.on Servic.s Geospat.al Informat.on Informat.on Ac.ess

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