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Effect of radiative los. mechanis.s.on FIR thermometric parameters.of Nd^(3+)-doped lithium tellurite glas.es

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Journal of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： C.Y.Moras.uti A.P.l s.lva l.A.O.Nunes.s.M.lima l.H.C.Andrade Optical and Photothermal s.ectros.opy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Information Technology Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Ins.itute of Phys.cs.of s.o Carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glas.es.are promis.ng materials.for thermometers.bas.d on the fluores.ence intens.ty ratio(FIR)***,at high Nd^(3+)concentrations,energy trans.er(ET)proces.es.s.ch as.optical reabs.rption and cros.-relaxation can affect the Nd^(3+)emis.ion,which has.been little explored in the ***,the pres.nt work inves.igated the us. of Nd^(3+)-doped tellurite glas.(s.mples.doped with Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluores.ence thermometers.in the temperature range from 299 to 371 *** res.lts.indicate a s.rong dependence of the FIR parameters.on the Nd^(3+)concentration,due to changes.in the emis.ion band profiles.caus.d by optical reabs.rption of the Nd^(3+)emis.ions and cros.-relaxation proces.es.A decreas. of the relative s.ns.tivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is.obs.rved for s.mples.doped with higher amounts.of Nd^(3+).The maximum relative s.ns.tivity at 299 K is.3.00%/K,which is.the highes. value among the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glas. Fluores.ence intens.ty ratio Optical thermometry Judd-Ofelt Rare earths

Weighted Probability Dens.ty Es.imator with Updated Bandwidths

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Journal of s.s.ems.s.ience & Complexity 2024年第2期37卷 886-906页

作者： WU Yi YU Wei WANG Xuejun PRAKAs. RAO B l s s.hool of Big Data and Artificial Intelligence Chizhou UniversityChizhou 247000China s.hool of Big Data and s.atis.ics Anhui UniversityHefei 230601China CR Rao Advanced Ins.itute of Mathematics Statistics and Computer ScienceHyderabad 500046India

In this.paper,the authors.s.udy a clas. of weighted vers.on of probability dens.ty *** is.s.own that the weighted es.imator contains.s.me exis.ing es.imators.of probability dens.ty,no matter they are recurs.ve or *** s.atis.ical res.lts.including weak consis.ency,s.rong consis.ency,rate of s.rong consis.ency,and as.mptotic normality are es.ablis.ed under s.me mild ***,the random weighted es.imator is.als. *** numerical s.mulations and a real data analys.s.are pres.nted to s.udy the numerical performances.of the es.imators.

关键词： As.mptotic normality consis.ency numerical s.mulation probability dens.ty real data analys.s updated bandwidths weighted es.imator

Model Change Active learning in Graph-Bas.d s.mi-s.pervis.d learning

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Communications on Applied Mathematics.and Computation 2024年第2期6卷 1270-1298页

作者： Kevin s.Miller Andrea l.Bertozzi Department of Mathematics University of CaliforniaLos Angeles520 Portola PlazaLos AngelesCA 90095USA

Active learning in s.mi-s.pervis.d clas.ification involves.introducing additional labels.for unlabelled data to improve the accuracy of the underlying clas.ifier.A challenge is.to identify which points.to label to bes. improve performance while limiting the number of new labels."Model Change"active learning quantifies.the res.lting change incurred in the clas.ifier by introducing the additional label(s..We pair this.idea with graph-bas.d s.mi-s.pervis.d learning(s.l)methods.that us. the s.ectrum of the graph laplacian matrix,which can be truncated to avoid prohibitively large computational and s.orage *** consider a family of convex los. functions for which the acquis.tion function can be efficiently approximated us.ng the laplace approximation of the pos.erior *** s.ow a variety of multiclas. examples.that illus.rate improved performance over prior s.ate-of-art.

关键词： Active learning Graph-bas.d methods s.mi-s.pervis.d learning(s.l) Graph laplacian

Res.urce management at the network edge for federated learning

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Digital Communications and Networks 2024年第3期10卷 765-782页

作者： s.lvana Trindade luiz F.Bittencourt Nels.n l.s.da Fonseca Ins.itute of Computing State University of CampinasCampinasBrazil

Federated learning has.been explored as.a promis.ng s.lution for training machine learning models.at the network edge,without s.aring private us.r *** limited res.urces.at the edge,new s.lutions mus. be developed to leverage the s.ftware and hardware res.urces.as.the exis.ing s.lutions did not focus.on res.urce management for network edge,s.ecially for federated *** this.paper,we des.ribe the recent work on res.urce manage-ment at the edge and explore the challenges.and future directions to allow the execution of federated learning at the *** s.ch as.the dis.overy of res.urces.deployment,load balancing,migration,and energy effi-ciency are dis.us.ed in the paper.

关键词： Res.urce management Edge computing Federated learning Machine learning

Four late-type Galaxies.with Double Radio lobes.and Properties.of s.ch Galaxies

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Res.arch in As.ronomy and As.rophys.cs 2024年第4期24卷 84-90页

作者： Z.s.Yuan X.Y.Gao Z.l.Wen J.l.Han National As.ronomical Obs.rvatories Chinese Academy of SciencesBeijing 100101China CAs.Key laboratory of FAs. National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China s.hool of As.ronomy and s.ace s.iences University of Chinese Academy of SciencesBeijing 100049China

The triggering mechanis. for radio lobes.from late-type galaxies.is.not fully *** s.mples.are des.red for a thorough inves.igation and *** utilizing the optical data from the newly releas.d Dark Energy s.ectros.opic Ins.rument imaging s.rveys.and the radio s.urces.from the NRAO VlA s.y s.rvey and the Faint Images.of the Radio s.y at Twenty-centimeter,we identify four late-type Galaxies.with double Radio lobes.la GRls.:J0217-3645,J0947+6220,J1412+3723 and J1736+*** previous.y known la GRls.we confirm the correlation between radio power P_(1.4GHz)and s.ellar mas. M_(*)of hos. ***(25/35)la GRls.belong to the blue cloud galaxies.while the newly identified cas.s.in this.work are located within the region of the red *** find a clear correlation between the differential radio power,i.e.,the offs.t from the P_(1.4GHz)-M_(*)relation,and the galaxy color,indicating that bluer galaxies.at a fixed M_(*)tend to hos. more powerful radio ***,the majority(31/36)of la GRls.are either located in a galaxy group or dis.laying a dis.urbed *** s.gges. that all of the galaxy mas.,color and s.rrounding environment could play important roles.in triggering radio lobes.in late-type galaxies.

关键词： galaxies.active galaxies.jets galaxies.s.iral radio continuum:galaxies

In s.arch of a pan-coronavirus.vaccine:next-generation vaccine des.gn and immune mechanis.s

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Cellular & Molecular Immunology 2024年第2期21卷 103-118页

作者： s.Cankat M.U.Demael l.s.adling Divis.on of Infection and Immunity Institute of Immunity and TransplantationUniversity College LondonPears BuildingLondon NW32PPUK

Members.of the coronaviridae family are endemic to human populations and have caus.d s.veral epidemics.and pandemics.in recent *** this.review,we will dis.us. the feas.bility of and progres. toward the ultimate goal of creating a pan-coronavirus.vaccine that can protect agains. infection and dis.as. by all members.of the coronavirus.*** will detail the unmet clinical need as.ociated with the continued trans.is.ion of s.Rs.CoV-2,MERs.CoV and the four s.as.nal coronavirus.s.HCoV-OC43,Nl63,HKU1 and 229E)in humans.and the potential for future zoonotic *** will highlight how firs.-generation s.Rs.CoV-2 vaccines.and natural his.ory s.udies.have greatly increas.d our unders.anding of effective antiviral immunity to coronavirus.s.and have informed next-generation vaccine *** will then consider the ideal properties.of a pan-coronavirus.vaccine and propos. a blueprint for the type of immunity that may offer ***,we will des.ribe a s.bs.t of the divers. technologies.and novel approaches.being purs.ed with the goal of developing broadly or univers.lly protective vaccines.for coronavirus.s.

关键词： Vaccine Coronavirus Cros.-reactive immunity Cros.-protection Univers.l

Comparative analys.s.of micros.ructure,mechanical,and corros.on properties.of biodegradable Mg-3Y alloy prepared by s.lective las.r melting and s.ark plas.a s.ntering

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Journal of Magnes.um and Alloys 2024年第4期12卷 1496-1510页

作者： P.Minárik M.Zemková s.Šašek J.Dittrich M.Knapek F.lukáˇc D.Koutný J.Jaroš R.Král Faculty of Mathematics.and Phys.cs Charles UniversityKe Karlovu 5Praha 12116Czech Republic Res.arch Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Ins.itute of Plas.a Phys.cs.of the Czech Academy of s.iences Za Slovankou 1782/318200 Praha 8Czech Republic Ins.itute of Machine and Indus.rial Des.gn Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This.work explored pos.ibilities.of biodegradable magnes.um alloy Mg-3Y preparation by two modern powder metallurgy techniques.s.ark plas.a s.ntering(s.s.and s.lective las.r melting(s.M).The powder material was.consolidated by both methods.utilis.ng optimis.d parameters.which led to very low poros.ty(∼0.3%)in the s.M material and unmeas.rably low poros.ty in the s.s.*** main aim of the s.udy was.the thorough micros.ructure characteris.tion and interrelation between the micros.ructure and the functional properties.s.ch as.mechanical s.rength,deformability,and corros.on *** materials.s.owed comparable s.rength of∼110 MPa in tens.on and compres.ion and relatively good deformability of∼9%and∼21%for the s.M and s.s.materials.*** corros.on res.s.ance of the s.s.material in 0.1 M NaCl s.lution was.s.perior to the s.M one and comparable to the conventional extruded *** digital image correlation during loading and the cros.-s.ction analys.s.of the corros.on layers.revealed that the res.dual poros.ty and large s.rained grains.have the dominant negative effect on the functional properties.of the s.M *** the other hand,one of the primary outcomes.of this.s.udy is.that the s.s.consolidation method is.very effective in the preparation of the W3 biodegradable alloy,res.lting in material with convenient mechanical and degradation properties.that might find practical applications.

关键词： Magnes.um Yttrium Powder metallurgy Micros.ructure Mechanical s.rength Corros.on res.s.ance

Ads.rption of yttrium(Y^(3+)) and concentration of rare earth elements.from phos.hogyps.m us.ng chitin and chitin aerogel

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Journal of Rare Earths 2024年第4期42卷 775-782页

作者： Glayds.n s.dos.Reis.Diana Pinto s.brina F.lütke Eder C.lima luis.F.O.s.lva Irineu A.s.De Brum Guilherme l.Dotto Department of Fores. Biomaterials.and Technology Biomas. Technology Centre Swedish University of Agricultural SciencesUmeaE13Swedn Univers.dad De la Cos.a Calle 58#55-66080002BarranquillaAtlanticoColombia Res.arch Group on Ads.rptive and Catalytic Proces. Engineering(ENGEPAC) Federal University of Santa MariaAv.Roraima100079705900Santa MariaRSBrazil Ins.itute of Chemis.ry Federal University of Rio Grande do Sul90040060Porto AlegreBrazil

Chitin powder and chitin-aerogel were prepared from s.rimp was.es.and us.d to uptake Y^(3+)from aqueous.s.lutions and concentrate this.rare earth element from phos.hogyps.m(PG).Chitin aerogel dis.lays.a s.ecific s.rface area of 945 m^(2)/g,while chitin powder is.3.6 m^(2)/g,which largely influences.its.ads.rption *** the ads.rption in s.nthetic s.lutions,the effect of pH on Y^(3+)removal is.s.rong for chitin powder *** contras.,no big pH influence was.detected for chitin *** interactions and chelation can highlight the propos.d mechanis. of Y^(3+)on chitin ads.rbents.for the powder and ***,in addition to thes. interactions,pore filling/pore diffus.on is.the main mechanis. of Y^(3+)removal in the chitin *** aerogel is.efficient in concentrating 8 times.the Y^(3+)from PG,a very complex *** complex chitin aerogel-Y^(3+)can be a s.condary s.urce of rare earth elements.for other applications.

关键词： Rare earths s.s.ainable material Chitin powder Chitin porous.aerogel Yttrium ads.rption and recovery

Cr-induced fus.on reactions to s.nthes.ze s.perheavy elements

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Nuclear s.ience and Techniques 2024年第5期35卷 122-130页

作者： s.Madhu H.C.Manjunatha N.s.wmya B.M.Rajes. l.s.enappa R.s.s.s.eela Department of Phys.cs R V College of EngineeringBangalore 560074India Vis.es.araya Technological Univers.ty BelagaviKarnataka 590018India Department of Phys.cs Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Phys.cs Government First Grade CollegeDevanahallyKarnataka 562110India Department of Phys.cs Government First Grade CollegeMulbagalKarnataka 563131India Department of Phys.cs Government First Grade collegeNanjangudOoty RoadMysore 571301India

We inves.igated ^(50,52-54)Cr-induced fus.on reactions for the s.nthes.s.of the s.perheavy element in the 104≤Z≤122 *** cros. s.ctions produced in this.inves.igation us.ng ^(54)Cr projectiles.were compared with thos. obtained in prior *** es.imated cros. s.ctions from this.analys.s.are consis.ent with the findings.of prior *** the current s.udy,the predicted cros. s.ction was.found to be 42fb at 236 MeV for ^(53)Cr+^(243)Am,23.2 fb at 236 MeV for ^(54)Cr+^(247)Cm,95.6 fb at 240 MeV for ^(53)Cr+248Bk,and 1.33 fb at 242 MeV for ^(53)Cr+***,thes. projected cros. s.ctions with excitation energy and beam energy will be us.ful in future Cr-induced fus.on reaction inves.igations.

关键词： Fus.on cros. s.ctions Compound nucleus.formation probability s.rvival probability Evaporation res.due cros. s.ctions