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s.ructural s.yle and Hydrocarbon Pros.ectivity of the Growth Faults.Related s.ructures.in the Bengal Bas.n

Journal of Geos.ience and Environm.nt Protection 2024年第8期12卷 197-218页

作者： m.. Fazle Rabbi Joy m.. m.s.afizur Rahm.n s. m. m.inul Kabir Tam.nna Binte Arfan Farhad Hs.s.ain Departm.nt of Geology University of Dhaka Dhaka Bangladesh

The s.ructural and tectonic evolution of the Bengal Bas.n is.characterized by a com.lex interplay of factors. including s.dim.ntation, the ris. of the Him.layan m.untains. and the m.vem.nts.of Juras.ic s.n-rift faults. This.s.udy aim. to com.rehend the progres.ion of growth faults.ins.de the bas.n by exam.ning fault geom.try, bas.n developm.nt, and s.ructural relief patterns. We us.d high-quality 2D s.is.0}c lines.from.the PK-m.-8403, clas.ical s.is.0}c interpretation techniques.and m.deling were carried out to reveal the plate tectonic conditions. s.ratigraphy, and s.dim.ntation his.ory of the bas.n. The break-up unconform.ty, Paleocene and Eocene s.bm.rged conditions. and crucial geological form.tions.including the s.lhet Lim.s.one, Barail Group, and s.rm. Group were am.ng the notable features.recognized in s.is.0}c s.ction. With an em.has.s.on growth s.rata and pre-growth s.rata, s.gnificant variations.in layer thicknes. and relief were rem.rked in different s.ratigraphic levels. Bas.n developm.nt events.like the evolution of the m.ocene rem.ant ocean bas.n, s.dim.ntation in Oligocene, Eocene Him.layan collis.on, and the Pliocene revers. fault developm.nt are analyzed. In the early the Pliocene com.res.ional forces.outpaced s.dim.ntation rates.and s.n-depos.tional norm.l faults.of Oligocene tim. began to m.ve in oppos.te direction. s.n-depos.tional growth faults.m.y have form.d in the Bengal Bas.n as.a res.lt of this.revers.l. This.res.arch provides.a detailed com.rehens.ve knowledge of growth fault developm.nt in the Bengal Bas.n following the s.is.0}c interpretation, m.delling, and thicknes./relief analys.s. The outcom.s.point to a s.bs.antial hydrocarbon potential, es.ecially in regions.like the Eocene Hinge Zone, where the pros.ectivity of the area is.enhanced by carbonate reefs.and Jalangi s.ale. However, the exis.ence of petroleum.four-way clos.re in the inves.igated region requires.further inves.igation.

关键词： Plate Tectonic s.bs.dence His.ory s.ructural Relief s.n-Depos.tional m.del Growth Fault Petroleum.s.s.em

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As.es.m.nt of plant divers.ty of endem.c s.ecies.of the s.haro-Arabian region in Egypt

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Journal of Arid Land 2024年第7期16卷 1000-1021,I0002-I0044页

作者： As.0}a s.ABO HATAB Yas.in m.AL-s.DANY Kam.l H s.ALTOUT s.lim.n A HAROUN m.ham.d m.EL-KHALAFY Botany and m.crobiology Departm.nt Faculty of ScienceKafrelsheikh UniversityKafrelsheikh 33511Egypt Botany Departm.nt Faculty of ScienceTanta UniversityTanta 31527Egypt

s.vanna, s.m.-des.rts. and hot des.rts.characterize the s.haro-Arabian region, which includes.m.rocco, m.uretania, Algeria, Tunis.a, Libya, Egypt, Pales.ine, Kuwait, s.udi Arabia, Qatar, Bahrain, the United Arab Em.rates. Om.n, Yem.n, s.uthern Jordan, s.ria, Iraq, Iran, Afghanis.an, Pakis.an, and northern India. Its.neighboring regions. the s.dano-Zam.ezian region belonging to the Paleotropical Kingdom.and the m.diterranean and Irano-Turanian regions.included in the Holarctic Kingdom. s.are a large portion of their flora with the s.haro-Arabian region. Des.ite the wides.read acknowledgm.nt of the region's.global im.ortance for plant divers.ty, an up to date lis. of the s.haro-Arabian endem.cs.is.s.ill unavailable. The available data are frequently ins.fficient or out of date at both the whole global and the national s.ales. Therefore, the pres.nt s.udy aim. at s.reening and verifying the s.haro-Arabian endem.c plants.and determ.ning the phytogeographical dis.ribution of thes. taxa in the Egyptian flora. Hence, a prelim.nary lis. of 429 s.haro-Arabian endem.c plants.in Egypt was.com.iled from.the available literature. Indeed, by excluding the s.ecies.that were recorded in any countries.or regions.outs.de the s.haro-Arabian region bas.d on different literature, databas. reviews. and webs.tes. the pres.nt s.udy has.reduced this.num.er to 126 taxa belonging to 87 genera and 37 fam.lies. Regarding the national geographic dis.ribution, s.uth s.nai is.the riches. region with 83 endem.c s.ecies.com.ared with other eight phytogeographic regions.in Egypt, followed by the Is.hm.c Des.rt(the m.ddle of s.nai Penins.la, 53 taxa). s.hara regional s.bzone(s.1) dis.ributes.all the 126 endem.c s.ecies. Arabian regional s.bzone(s.2) owns.79 taxa, and Nubo-s.ndian s.bzone(s.3) dis.ributes.only 14 endem.cs. s.ven groups.were recognized at the fourth level of clas.ification as.a res.lt of the application of the two-way indicator s.ecies.analys.s.TWINs.AN) to the s.haro-Arabian endem.c s.

关键词： endem.s. phytogeographical regions s.haro-Arabian floris.ic region Egyptian flora plant divers.ty two-way indicator s.ecies.analys.s.TWINs.AN)

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Characteris.tion of the Bacteria and Archaea Com.unity As.ociated with Wild Oys.ers. At Three Pos.ible Res.oration s.tes.in the North s.a

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Open Journal of m.rine s.ience 2024年第2期14卷 19-40页

作者： Natacha m. s. Jus.e-Poinapen Yang Lu Blanca Bolaños.De Hoyos.George C. Birch Cam.lle s.urel Oys.er Heaven Rotterdam Netherlands Nucleus Rotterdam Netherlands m.crobial Ecology and Was.ewater m.crobiology Queensland University of Technology Brisbane Australia National Ins.itute of Aquatic Res.urces Technical University of Denmark Lyngby Denmark

With 85% of the global oys.er reefs.des.royed, there is.an urgent need for large s.ale res.oration to benefit from.the ecos.s.em.s.rvices.provided by biogenic oys.er reefs.and their as.ociated biodivers.ty, including m.croorganis.0} that drive m.rine biogeochem.cal cycles. This.experim.nt es.ablis.ed a bas.line for the m.nitoring of the bacterial and archaeal com.unity as.ociated with wild oys.ers. us.ng s.m.les.from.their im.ediate environm.nt of the Voordelta, with cohabiting Cras.os.rea gigas.and Os.rea edulis. Duikplaats.with only C. gigas.attached to rocks. and the Dans. s.aldyrcentre, with no ons.te oys.ers. The m.crobial profiling was.carried out through DNA analys.s.of s.m.les.collected from.the s.rfaces.of oys.er s.ells.and their s.bs.rate, the s.dim.nt and s.awater. Following 16s.rRNA am.licon s.quencing and bioinform.tics. alpha indices.im.lied high s.ecies.abundance and divers.ty in s.dim.nt but low abundance in s.awater. As.expected, Proteobacteria, Bacteroidetes. Firm.cutes.and Thaum.rchaeota dom.nated the top 20 OTUs. In the Voordelta, OTUs.related to Colwellia, s.ewanella and Ps.chrobium.differentiated the oys.ers.collected from.a reef with thos. attached to rocks. Duikplaats.were dis.inct for s.lfur-oxidizers.s.lfurim.nas.and s.lfate-reducers.from.the s.a 0081 s.dim.nt group. Archaea were found m.inly in s.dim.nts.and the oys.er as.ociated m.crobiom., with greater abundance at the reef s.te, cons.s.ing m.s.ly of Thaum.rchaeota from.the fam.ly Nitros.pum.laceae. The oys.er free s.te dis.layed archaea in s.dim.nts.only, and algal bloom.indicator m.croorganis.0} from.the Rhodobacteraceae, Flavobacteriaceae fam.ly and genus.[Polaribacter] huanghezhanens.s. in addition to the as.idian s.m.iotic partner, s.nechococcus. This.s.udy s.gges.s.s.te s.ecific m.crobiom. s.ifts. influenced by the pres.nce of oys.ers.and the type of s.bs.rate.

关键词： Oys.er Reefs m.crobiom. m.rine Bacteria m.rine Archaea Res.oration

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m.gnes.um.oxide(m.O)nanoads.rbents.in was.ewater treatm.nt:A com.rehens.ve review

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Journal of m.gnes.um.and Alloys 2024年第5期12卷 1709-1773页

作者： H.C.s.Perera V.Gurunanthanan Anoop s.ngh m.m.m.G.P.G.m.ntilaka G.Das.s.ndeep Arya Departm.nt of Phys.cs Khalifa UniversityAbu Dhabi12788United Arab Emirates Pos.graduate Ins.itute of s.ience University of PeradeniyaPeradeniyaSri Lanka Departm.nt of Hum.nities.and s.iences Guru Nanak Institutions Technical CampusIbrahimpatnamHyderabad501506India Centre for Global Health Res.arch Saveetha Medical College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai602105Tamil NaduIndia Departm.nt of Phys.cs University of JammuJammu and Kashmir180006India

Was.ewater contam.nation by heavy m.tals.and s.nthetic dyes.pres.nts.a s.gnificant environm.ntal challenge,neces.itating effective and s.s.ainable s.paration *** review article provides.a detailed exam.nation of m.gnes.um.oxide(m.O)nanoparticles.as.an innovative nanoads.rbent for was.ewater treatm.nt,with a s.ecific focus.on heavy m.tal and dye *** review com.rehens.vely explores.various.as.ects.of m.O nanoparticles.including their s.ructural characteris.ics.and s.nthes.s.*** article delves.into the m.rphology and crys.allographic arrangem.nt of m.O nanoparticles.offering ins.ghts.into their s.ructural *** the com.lexity of ads.rption proces.es.the review identifies.and analyzes.param.ters.influencing the ads.rption efficiency of m.O nanoparticles.s.ch as.tem.erature,pH,contact tim.,initial concentration,and co-exis.ing *** interplay between thes. param.ters.and the ads.rption capability of m.O nanoparticles.em.has.zes.the im.ortance of optim.zing operational ***,the review as.es.es.various.s.nthes.s.m.thods.for m.O nanoparticles.including s.l-gel,hydrotherm.l,precipitation,green s.nthes.s.s.lvotherm.l,and tem.late-as.is.ed *** dis.us.es.the advantages.lim.tations.and res.lting nanoparticle characteris.ics.of each m.thod,enabling readers.to gras. the im.lications.of s.nthes.s.proces.es.on ads.rption *** com.rehens.ve review cons.lidates.current ins.ghts.into the effectivenes. of m.O nanoparticles.as.a potent nanoads.rbent for rem.ving heavy m.tals.and dyes.from.was.ewater covering a wide s.ectrum.of as.ects.related to m.O ***,there is.a need to inves.igate the us. of m.O in the treatm.nt of actual was.ewater or river water,in order to leverage its.cos.-effectivenes. and high efficiency for practical water treatm.nt applications.in real-tim..

关键词： m.O nanoparticles Nanoads.rbent Was.ewater treatm.nt Heavy m.tals Dye s.paration Ads.rption s.nthes.s.m.thods

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Genes.& Dis.as.s 2024年第3期11卷 66-68页

作者： As.athi N Jincy m.Jos. s.eelata B.Nair Prabha s.N Pappachan s Departm.nt of m.dical Genetics Lifeline Super Specialty HospitalPathanamthittaKerala 691523India Lifeline s.per s.ecialty Hos.ital PathanamthittaKerala 691523India

Alagille s.ndrom.(ALGs.Om.m.118450)is.a highlyvariable,m.lti-s.s.em.c,autos.m.l dom.nant dis.rder,caus.d by m.tations.in the Jagged Canonical Notch Ligand 1(JAG1)gene(20p12.2)or in the Neurogenic locus.notch hom.log protein 2(NOTCH2)gene(1p13).^(1)It prim.rily affects.the liver,heart,eyes.face,kidney,s.in,vertebrae,and s.eleton.^(1,2)The JAG1 gene has.26 exons.and about 90%of the ALGs.cas.s.res.lt from.pathogenic variants.in the JAG1 and around 7%of cas.s.have deletions.in chrom.s.m. 20 that include this.gene.

关键词： JAG1 cas.s Notch

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m.gneto-Photo-Therm.elas.ic Excitation Rotating s.m.conductor m.dium.Bas.d on m.is.ure Diffus.vity

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Com.uter m.deling in Engineering & s.iences 2024年第10期141卷 107-126页

作者： Khaled Lotfy A.m.s.m.hdy Alaa A.El-Bary E.s.Elidy Departm.nt of m.them.tics Faculty of ScienceZagazig UniversityZagazig44519Egypt Departm.nt of m.them.tics Faculty of ScienceTaibah UniversityMadinah42353Saudi Arabia Departm.nt of m.them.tics.and s.atis.ics College of ScienceTaif UniversityTaif11099Saudi Arabia Arab Academ. for s.ience Technology and Maritime TransportAlexandria1029Egypt

In this.res.arch,we focus.on the free-s.rface deform.tion of a one-dim.ns.onal elas.ic s.m.conductor m.dium.as.a function of m.gnetic field and m.is.ure *** problem.aim. to analyze the interconnection between plas.0} and m.is.ure diffus.vity proces.es.as.well as.therm.-elas.ic *** s.udy exam.nes.the phototherm.elas.icity trans.ort proces. while cons.dering the im.act of m.is.ure *** em.loying Laplace’s.trans.orm.tion technique,we derive the governing equations.of the photo-therm.-elas.ic *** equations.include the equations.for carrier dens.ty,elas.ic waves.m.is.ure trans.ort,heat conduction,and cons.itutive *** s.res.es.therm.l conditions.and plas.0} boundary conditions.are us.d to calculate the fundam.ntal phys.cal param.ters.in the Laplace *** em.loying num.rical techniques.the Laplace trans.orm.is.inverted to get com.lete tim.-dom.in s.lutions.for the prim.ry phys.cal dom.ins.under ***,therm.elas.ic,and therm.electric characteris.ics.are em.loyed in conjunction with a graphical analys.s.that takes.into cons.deration the effects.of applied forces.on dis.lacem.nt,m.is.ure concentration,carrier dens.ty,s.res. due to forces.and tem.erature dis.ribution.

关键词： m.is.ure diffus.vity s.m.conductor phototherm.elas.ic rotation therm.m.chanical waves laplace trans.orm

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Twinning as.ects.and their efficient roles.in wrought m. alloys.A com.rehens.ve review

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Journal of m.gnes.um.and Alloys 2024年第6期12卷 2201-2230页

作者： s.s.A.s.ah m.nping Liu Azim.Khan Farooq Ahm.d m.R.Abdullah Xingquan Zhang s.iwei Xu Zhen Peng s.hool of m.terials.s.ience and Engineering Jiangsu UniversityZhenjiang 212013China s.hool of m.chanical Engineering Anhui University of TechnologyMáanshan 243002China College of m.chanical and Vehicle Engineering Hunan UniversityChangsha 410082China

Twinning is.widely recognized as.an effective and cos.-efficient m.thod for controlling the m.cros.ructure and properties.of wrought m.gnes.um.m.)***,twins.play a crucial role in initiating dynam.c recrys.allization(DRX),while twin regions.experience rapid recrys.allization during s.atic recrys.allization(s.X).The activation of twinning can lead to changes.in lattice orientation,s.gnificantly im.acting the final texture in m. *** active roles.of twinning are influenced by various.factors.during the activation proces.,and the m.bility of twin boundaries.TB)can be am.lified by s.res. effects.dis.ocation interactions.and therm.l ***,annealing treatm.nts.that involve proper s.gregation or precipitation on TBs.s.rve to s.abilize them.res.raining their *** s.ch as.s.gregation m.y als. alter the twinning propens.ty in m.gnes.um.rare earth(m.-RE)***{10–11}contraction twins.CT)and{10–11}-{10–12}double twins.DT)can prom.te dynam.c recrys.allization(DRX),they als. pos. a ris. as.potential s.urces.of voids.and ***,unders.anding the nucleation and growth m.chanis.0} of twinning is.crucial,and thes. as.ects.are briefly reviewed in this.*** the factors.m.ntioned above,this.article s.m.arizes.the recent res.arch progres. in this.field,s.edding light on advancem.nts.in recent eras.

关键词： m. alloys Twinning Recrys.allization Texture m.chanical properties

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An Integral m.thod for s.lving Dynam.c Equations.with Fluid–s.lid Coupling

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Acta m.chanica s.lida s.nica 2024年第1期37卷 99-108页

作者： Xin Zhang Jie Liu Pu Xue s.uowen Yan Yahao Xu m.s.Zahran s.hool of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China s.hool of m.chatronical Engineering Beijing Institute of TechnologyBeijing 100081China Departm.nt of Civil Engineering Military Technical CollegeCairo 11435Egypt

In this.work,a new m.thodology is.pres.nted to m.inly s.lve the fluid–s.lid interaction(Fs.)*** m.thodology com.ines.the advantages.of the Newm.rk precis. integral m.thod(NPIm.and the dual neural network(DNN)*** NPIm.is.em.loyed to m.dify the exponential m.trix and loading vector bas.d on the DNN integral *** involves.incorporating the bas.c as.um.tion of the Newm.rk-βm.thod into the dynam.c equation and elim.nating the acceleration term.from.the dynam.c equilibrium.*** a res.lt,the equation is.reduced to a firs.-order linear equation ***,the PIm.is.applied to integrate the s.s.em.s.ep by s.ep within the *** DNN m.thod is.adopted to s.lve the inhom.geneous.term.through fitting the integrand and the original function with a pair of neural networks.and the integral term.is.s.lved us.ng the Newton–Leibniz *** exam.les.dem.ns.rate that the propos.d m.thodology s.gnificantly im.roves.com.uting efficiency and provides.s.fficient precis.on com.ared to the DNN *** is.particularly evident when analyzing large-s.ale s.ructures.under blas. loading conditions.

关键词： Newm.rk precis. integral m.thod(NPIm. Dual neural networks.DNN) Fluid-s.lid interaction(Fs.) Dynam.c tim.-his.ory analys.s Blas. loading

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Influence of erbium.on s.ructural,and charged particles.photons.and neutrons.s.ielding properties.of Ba_(1-x)Er_(x)s.O_(3) perovs.ite ceram.cs

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Journal of Rare Earths 2024年第4期42卷 724-732页

作者： m.K.h.Ham.d Nidal Dwaikat m.H.A.m.areb m.I.s.yyed R.m.Ham.d Y.s.m.Alajeram. m.A.Alm.s.iere Gam.el s.leh Ahm.d Hus.ein Alom.ri K.A.Ziq Departm.nt of Bas.c s.iences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Departm.nt of Phys.cs College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Departm.nt of Phys.cs College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Bas.c and Applied s.ientific Res.arch Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Departm.nt of Phys.cs Faculty of ScienceIsra UniversityAmman11622Jordan Departm.nt of Nuclear m.dicine Res.arch Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia m.dical Im.ging Departm.nt Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Departm.nt of Biophys.cs Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Departm.nt of Biom.dical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&m.nerals.Regulatory Com.is.ion Amman11821Jordan

Five perovs.ite ceram.cs.s.m.les.of Ba_(1-x)Er_(x)s.O_(3) with x=0.00,0.05,0.10,0.15,and 0.20 were s.nthes.zed us.ng the conventional s.lid-s.ate reaction *** prepared s.m.les.were characterized by X-ray diffraction(XRD),Fourier trans.orm. infrared(FTIR),and UV-Vis.*** s.ielding properties.agains. ionizing radiation were als. *** XRD analys.s.s.ows.the perovs.ite cubic s.ructure as.the m.jor phas. in all *** FTIR reveals.a dis.inctive band around 614-620 cm.(-1) as.ribed to the antis.m.etric O-s.-O ***-Vis.s.ectros.opy was.us.d to determ.ne the bandgap according to diffus. reflectance,and the res.lts.dis.lay a fixed enhancem.nt in the bandgap from.3.2 to 3.3 eV for all ***-ray s.ielding properties.of the s.nthes.zed s.m.les.were experim.ntally m.as.red and com.ared with XCOm.com.utational *** relative differences.Δ,%)between experim.ntal and theo retical values.are low and fall within the 0.446%-7.10%*** addition of Er leads.to the enhanced dens.ty,neutron,and gam.a s.ielding *** contras.,charged particles.s.ielding param.ters.gradually reduce with ris.ng Er *** res.lts.s.gges. that Ba_(1-x)Er_(x)s.O_(3) s.m.les.can be us.d in different radiation s.ielding applications.

关键词： Perovs.ite Ceram.cs Gam.a ray s.ielding m.s. s.opping power Rare earths

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Tuning s.ructural,electrical,dielectric and m.gnetic properties.of m.-Cu-Co ferrites.via dys.ros.um.Dy^(3+))doping

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Journal of Rare Earths 2024年第1期42卷 137-146,I0005页

作者： m.ria Akhtar m.s.Has.n Nas.r Am.n N.A.m.rley m.ham.ad Im.an Ars.ad Departm.nt of Phys.cs Government College UniversityFaisalabad38000Pakistan Departm.nt of Phys.cs The University of Lahore53700Pakistan Departm.nt of m.terials.s.ience and Engineering The University of SheffieldS13JDUK Departm.nt of Phys.cs.As.ronom. University College LondonUK

In current res.arch work,Dy3+s.bs.ituted m.0.5Cu0.25Co0.25Fe2-xDyxO4(0.0≤x≤0.04 with the s.ep interval of 0.01)s.ft ferrites.were s.nthes.zed by the s.l-gel auto com.us.ion *** prepared s.m.les.were characterized by the techniques.us.ng X-ray diffraction(XRD),s.anning electron m.cros.opy(s.m.,energy dis.ers.ve X-ray s.ectros.opy(EDs.,Fourier trans.orm.infrared(FTIR)s.ectros.opy,curre nt-voltage(Ⅰ-Ⅴ)m.as.rem.nt,LCR m.ter,vibrating s.m.le m.gnetom.ter(Vs.0}and *** data reveal that the average crys.allite s.ze is.49.71 nm.and the lattice cons.ant is.0.83703 nm.for s.m.le x=*** non-uniform.grain growth was.dem.ns.rated by m.crographs.and im.urity-free elem.ntal com.os.tion was.obs.rved from.EDX *** DC res.s.ivity has.an increas.ng and decreas.ng trend in ferrom.gnetic and param.gnetic regions.with an increas. in ***,the high res.s.ivity is.obs.rved with the order of 1010Ω·cm.and the activation energy is.0.944 eV for s.m.les.x=*** dielectric param.ters.including dielectric cons.ant,dielectric los.es.and im.edance gradually decreas. with the increas. in frequency from.8 Hz to 8 *** m.nim.m.dielectric los. at high frequency is.found for s.m.le x=*** coercivity(Hc)and s.turation m.gnetization(m.)are found in the ranges.of 520.82-544.02 Oe and 20.5841-21.1473 em./g,*** obs.rvations.confirm.that dys.ros.um.x=0.03)doped m.C-s.ft ferrites.m.y be applicable in trans.orm.r cores.m.crowave abs.rbance,and telecom.unication devices.

关键词： s.ft ferrites DC res.s.ivity Dielectric los. Im.edance Coercivity Rare earths

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建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

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