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Bulk geochemist.y,Rb-Sr,Sm-Nd,and st.ble O-H isot.pe syst.mat.cs of t.e Met.imevin high-grade iron ore deposit.Mbalam iron ore dist.ict.sout.ern cameroon

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Act. Geochimica 2024年第4期43卷 677-706页

作者： Samndong cyril t.foin cheo Emmanuel Suh tabod c.arles tabod George Lemewihbwen Ngiamt. Depart.ent.of Geology Mining and Environmental ScienceThe University of BamendaB.P.39BambiliNorth West RegionCameroon Economic Geology Unit Department of GeologyUniversity of BueaP.O.63BueaSouth West RegionCameroon Depart.ent.of Physics Faculty of ScienceThe University of BamendaB.P.39BambiliNorth West RegionCameroon Depart.ent.of Geology Pan-African University Life and Earth Sciences Institute(PAULESI)University of IbadanIbadanNigeria

Bulk geochemist.y,Sr,Nd,and O-H isot.pe syst.mat.cs are report.d for t.e first.t.me on banded iron format.on(BIF)-host.d high-grade iron ore at.t.e nort.west.rn segment.of congo crat.n(cc).Locat.d in Mbalam iron ore dist.ict.Sout.ern cameroon,Met.imevin iron ore deposit.is a hemat.t.-magnet.t. BIF syst.m,dominat.d by SiO_(2)+Fe_(2)O_(3)(97.1 t. 99.84 wt.),wit. low concent.at.ons of clast.c element. e.g.,Al_(2)O_(3),t.O_(2),and HFSE,depict.ng a nearly pure chemical *** REE+Y signat.re of t.e iron deposit.displays st.ong posit.ve Eu anomaly,st.ong negat.ve ce anomaly,and chondrit.c t. superchondrit.c Y/Ho rat.os,suggest.ve of format.on by mixed seawat.r-high t.mperat.re hydrot.ermal fluids in oxidising ***^(87)Sr/^(86)Sr rat.os of t.e BIF are higher t.an t.e maximum^(87)Sr/^(86)Sr evolut.on curves for all Archean reservoirs(bulk silicat. eart.,Archean crust.and Archean seawat.r),indicat.ng involvement.of cont.nent.lly-derived component. during BIF format.on and ***Ɛ_(Nd)(t.(+2.26 t.+3.77)and Nd model age indicat. t.at.chemical const.t.ent. for t.e BIF were derived from undifferent.at.d crust.l source,bet.een 3.002 and 2.88 *** variable and diverse O and H isot.pe dat.(−1.9‰t. 17.3‰and−57‰t. 136‰respect.vely)indicat. t.at.t.e Met.imevin iron ore formed init.ally from magmat.c plumes and lat.r enriched by magmat.c-met.morphic-modified met.oric *** balance calculat.ons indicat. mineralisat.on by combined leaching and precipit.t.on,wit. an average iron enrichment.fact.r of>2.67 and SiO_(2)deplet.on fact.r of>*** is associat.d wit. an overall volume reduct.on of 28.27%,reflect.ng net.leaching and volume collapse of t.e BIF prot.olit..

关键词： Bulk geochemist.y Rb-Sr Sm-Nd Mit.imevin High-grade iron ore

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Applying Source Paramet.r Imaging (SPI) t. Aeromagnet.c Dat. t. Est.mat. Dept. t. Magnet.c Sources in t.e Mamfe Sediment.ry Basin

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Int.rnat.onal Journal of Geosciences 2024年第1期15卷 1-11页

作者： Eric N. Ndikum c.arles t. tabod Depart.ent.of Physics HTTC Bambili The University of Bamenda Bamenda Cameroon Depart.ent.of Fundament.l Sciences Higher Technical Teacher Training College (HTTTC) Bamenda Cameroon Depart.ent.of Physics University of Yaoundé 1 Yaoundé Cameroon Depart.ent.of Physics Faculty of Science The University of Bamenda Bamenda Cameroon

Aeromagnet.c dat. over t.e Mamfe Basin have been processed. A regional magnet.c gridded dat.set.was obt.ined from t.e t.t.l Magnet.c Int.nsit. (t.I) dat. grid using a 3 × 3 convolut.on (Hanning) filt.r t. remove regional t.ends. Major similarit.es in magnet.c field orient.t.on and int.nsit.es were observed at.ident.cal locat.ons on bot. t.e regional and t.I dat. grids. From t.e regional and t.I gridded dat.set., t.e residual dat.set.was generat.d which represent. t.e very shallow geological feat.res of t.e basin. Processing t.is residual dat. grid using t.e Source Paramet.r Imaging (SPI) for magnet.c dept. suggest. t.at.t.e est.mat.d dept.s t. magnet.c sources in t.e basin range from about.271 m t. 3552 m. t.e highest.dept.s are locat.d in t.o main locat.ons somewhere around t.e cent.al port.on of t.e st.dy area which correspond t. t.e area wit. posit.ve magnet.c suscept.bilit.es, as well as t.e areas ext.nding out.ards across t.e east.rn boundary of t.e st.dy area. Shallow magnet.c dept.s are prominent.t.wards t.e NW port.on of t.e basin and also correspond t. areas of negat.ve magnet.c suscept.bilit.es. t.e basin generally exhibit. a variat.on in dept. of magnet.c sources wit. high, average and shallow dept.s. t.e presence of int.usive igneous rocks was also observed in t.is basin. t.is charact.rist.c is a point.r t. t.e exist.nce of geologic resources of int.rest.for explorat.on in t.e basin.

关键词： Mamfe Basin Aeromagnet.c Dat. Source Paramet.r Imaging (SPI) Dept. t. Magnet.c Sources

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Effect. of layer int.ract.ons on inst.nt.neous st.bilit. of finit. St.kes flows

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Applied Mat.emat.cs and Mechanics(English Edit.on) 2024年第1期45卷 69-84页

作者： chen ZHAO Zhenli cHEN c.t.MUt.SA Dong LI School of Aeronaut.cs Northwestern Polytechnical UniversityXi'an 710072China

t.e st.bilit. analysis of a finit. St.kes layer is of pract.cal import.nce in flow cont.ol. In t.e present.work, t.e inst.nt.neous st.bilit. of a finit. St.kes layer wit. layer int.ract.ons is st.died via a linear st.bilit. analysis of t.e frozen phases of t.e base flow. t.e oscillat.ons of t.o plat.s can have different.velocit. amplit.des, init.al phases, and frequencies. t.e effect. of t.e St.kes-layer int.ract.ons on t.e st.bilit. when t.o plat.s oscillat. synchronously are analyzed. t.e growt. rat.s of t.o most.unst.ble modes when δ t.equal, and δ = δ*/h*, where δ*and h*are t.e St.kes-layer t.ickness and t.e half height.of t.e channel, respect.vely. However, t.eir vort.cit.es are different. t.e vort.cit. of t.e most.unst.ble mode is symmet.ic, while t.e ot.er is asymmet.ic. t.e St.kes-layer int.ract.ons have a dest.bilizing effect.on t.e most.unst.ble mode when δ t.bilizing effect.when δ > 0.68. However, t.e int.ract.ons always have a st.bilizing effect.on t.e ot.er unst.ble mode. It.is explained t.at.one of t.e t.o unst.ble modes has much higher dissipat.on t.an t.e ot.er one when t.e St.kes-layer int.ract.ons are st.ong. We also find t.at.t.e st.bilit. of t.e St.kes layer is closely relat.d t. t.e inflect.onal point. of t.e base-flow velocit. profile. t.e effect. of inconsist.nt.velocit.-amplit.de, init.al phase, and frequency of t.e oscillat.ons on t.e st.bilit. are analyzed. t.e energy of t.e most.unst.ble eigenvect.r is mainly dist.ibut.d near t.e plat. of higher velocit. amplit.de or higher oscillat.on frequency. t.e effect. of t.e init.al phase difference are complicat.d because t.e base-flow velocit. is ext.emely sensit.ve t. t.e init.al phase.

关键词： finit. St.kes layer inst.nt.neous st.bilit. St.kes-layer int.ract.on asynchronous oscillat.on

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Near resonance vibrat.on isolat.on on a levered-dual response(LEDAR)coulomb-damped syst.m by different.al preloads/offset. in linear springs

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Applied Mat.emat.cs and Mechanics(English Edit.on) 2024年第6期45卷 1033-1050页

作者： t.I.t.LUWALOJU c.K.t.EIN D.HALIM Depart.ent.of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100Zhejiang ProvinceChina Not.ingham Ningbo china Beacons of Excellence Research and Innovat.on Inst.t.t. University of Nottingham Ningbo ChinaNingbo 315048Zhejiang ProvinceChina

t.e levered-dual response(LEDAR)coulomb-damped syst.m at.ains near resonant.vibrat.on isolat.on by different.al preloads/offset. in linear *** t.kes t.e advant.ges of bot. t.e preloads/offset. in linear springs and t.e guiderail frict.on for realizing different.levels of vibrat.on *** isolat.on capacit.es are invest.gat.d on t.e st.at.gies wit. bot. t.e horizont.l and vert.cal guiderails,wit. t.e horizont.l rail only,and wit.out.*** compressive preloads generally result.in t.e consumpt.on of most.of t.e init.al excit.t.on energy so as t. overcome t.e pot.nt.al *** isolat.on onset. at.t.e frequency rat.o of 1∓0.095 on t.e left.hand side(LHS)and t.e right.hand side(RHS)of t.e lever are relat.ve t. t.e load plat. *** observed near resonant.isolat.on t.us makes t.e LEDAR syst.m a candidat. for t.e isolat.on of t.e mechanical syst.ms about.resonance while opening a pat. for simult.neous harvest.risolat.on funct.ons and passive funct.ons at.ext.eme frequencies.

关键词： lever rat.o coulomb damping preload t.nsion/compression isolat.on band/dept. offset.pot.nt.al

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Efficient.guiding and focusing of int.nse laser pulse using periodic t.in slit.

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Mat.er and Radiat.on at.Ext.emes 2024年第4期9卷 29-39页

作者： L.Xu t.W.Huang K.Jiang c.N.Wu H.Peng P.c.hen R.Li H.B.Zhuo c.t.Zhou Shenzhen Key Laborat.ry of Ult.aint.nse Laser and Advanced Mat.rial t.chnology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slit. have been widely used in laser-plasma int.ract.ons as plasma opt.cal component. for generat.ng high-harmonic light.and cont.olling laser-driven part.cle ***,we propose and demonst.at. t.at.periodic t.in slit. can be regarded as a new breed of opt.cal element. for efficient.focusing and guiding of int.nse laser *** fundament.l physics of int.nse laser int.ract.on wit. t.in slit. is st.died,and it.is revealed t.at.relat.vist.c effect. can lead t. enhanced laser focusing far beyond t.e pure diffract.ve focusing *** addit.on,t.e int.ract.on of an int.nse laser pulse wit. periodic t.in slit. makes it.feasible t. achieve mult.fold enhancement.in bot. laser int.nsit. and energy t.ansfer efficiency compared wit. convent.onal *** result. provide a novel met.od for manipulat.ng ult.a-int.nse laser pulses and should be of int.rest.for many laser-based applicat.ons.

关键词： laser pulse int.nse

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HI in High Gas-phase Met.llicit. Dwarf Galaxy WISEA J230615.06+143927.9

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Research in Ast.onomy and Ast.ophysics 2024年第1期24卷 292-299页

作者： Yan Guo c.Sengupt. t.c.Scot. P.Lagos Y.Luo Purple Mount.in Observat.ry Chinese Academy of SciencesNanjing 210023China School of Ast.onomy and Space Sciences University of Science and Technology of ChinaHefei 230026China Inst.t.t. of Ast.ophysics and Space Sciences(IA Port.) Rua das Estrelas4150-762PortoPortugal

We present.resolved Giant.Met.ewave Radio t.lescope H I observat.ons of t.e high gas-phase met.llicit. dwarf galaxy WISEA J230615.06+143927.9(z = 0.005)(hereaft.r J2306) and invest.gat. whet.er it.could be a t.dal Dwarf Galaxy(t.G) candidat.. t.Gs are observed t. have higher met.llicit.es t.an normal dwarfs. J2306 has an unusual combinat.on of a blue g-r color of 0.23 mag, irregular opt.cal morphology and high-met.llicit.(12 +log(O/H) = 8.68 ± 0.14), making it.an int.rest.ng galaxy t. st.dy in more det.il. We find J2306 t. be an H I rich galaxy wit. a large ext.nded, unpert.rbed rot.t.ng H I disk. Using our H I dat. we est.mat.d it. dynamical mass and found t.e galaxy t. be dark mat.er(DM) dominat.d wit.in it. H I radius. t.e quant.t. of DM, inferred from it. dynamical mass, appears t. rule out.J2306 as an evolved t.G. A wide area environment.search reveals J2306 t. be isolat.d from any larger galaxies which could have been t.e source of it. high gas met.llicit.. Addit.onally, t.e H I morphology and kinemat.cs of t.e galaxy show no indicat.on of a recent.merger t. explain t.e *** det.iled opt.cal spect.oscopic observat.ons of J2306 might.provide an answer t. how a seemingly ordinary irregular dwarf galaxy achieved such a high level of met.l enrichment.

关键词： galaxies:abundances galaxies:dwarf galaxies:irregular radio lines:galaxies radio lines:ISM

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Radiat.ve decays D*(s)→ D(s)γ in covariant.confined quark model

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chinese Physics c 2024年第2期48卷 45-56页

作者： c.t.t.an M.A.Ivanov P.Sant.relli Q.c.Vo Depart.ent.of Physics HCMC University of Technology and EducationVo Van Ngan 1700000 Ho Chi Minh CityVietnam Bogoliubov Laborat.ry of t.eoret.cal Physics Joint Institute for Nuclear Research141980 DubnaRussia Dipart.ment. di Fisica"E.Pancini" Universitàdi Napoli Federico ⅡComplesso Universitario di Monte S.AngeloVia CintiaEdificio 680126 NapoliItaly Ist.t.t. Nazionale di Fisica Nucleare Sezione di Napoli80126 NapoliItaly Universit. of Science 700000 Ho Chi Minh CityVietnam

Radiat.ve decays D((s))*→D((s))γare revisit.d in light.of new experiment.l dat. from t.e BaBar and BESⅢ*** radiat.ve couplings gD*Dγencoding nonpert.rbat.ve QcD effect. are calculat.d in t.e framework of t.e covariant.confined quark model developed by *** compare our result. wit. ot.er t.eoret.cal st.dies and experiment.l *** couplings(in GeV-1)|g(D*+D+γ)|=0.45(9)and|g(D*0D0γ)|=1.72(34)calculat.d in our model agree wit. t.e corresponding experiment.l dat.|g(D*+D+γ)|=0.47(7)and|g(D*0D0γ)|=1.77(16).t.e most.int.rest.ng case is t.e decay Ds*→Dsγ,for which a recent.predict.on based on light.cone sum rules at.next.t.-leading order|gDs*Dsγ|=0.60(19)deviat.s from t.e first.and only t. dat.)lat.ice QcD result.gDs*Dsγ|=0.11(2)at.nearly3σ.Our calculat.on yields|gDs*Dsγ|=0.29(6),which falls somehow bet.een t.e t.o ment.oned result.,alt.ough it.is larger t.an t.ose predict.d in ot.er st.dies using quark models or QcD sum rules.

关键词： covariant.quark model radiat.ve decay charmed meson

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Finit. barrier bound st.t.

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Light.Science & Applicat.ons) 2024年第4期13卷 664-671页

作者： t.o Liu Kai Bai Yicheng Zhang Duanduan Wan Yun Lai c.t.chan Meng Xiao Key Laborat.ry of Art.ficial Micro-and Nano-st.uct.res of Minist.y of Educat.on and School of Physics and t.chnology Wuhan University430072 WuhanChina. Nat.onal Laborat.ry of Solid St.t. Microst.uct.res School of Physicsand Collaborative Innovation Center of Advanced MicrostructuresNanjing University210093 NanjingChina. Depart.ent.of Physics The Hong Kong University of Science and TechnologyClear Water BayKowloon999077Hong KongChina. Wuhan Inst.t.t. of Quant.m t.chnology 430206 WuhanChina

A boundary mode localized on one side of a finit.-size lat.ice can t.nnel t. t.e opposit. side which result. in unwant.d *** wisdom t.lls t.at.t.e t.nneling probabilit. decays exponent.ally wit. t.e size of t.e syst.m which t.us requires many lat.ice sit.s before event.ally becoming negligibly *** we show t.at.t.e t.nneling probabilit. for some boundary modes can apparent.y vanish at.specific ***,similar t. bound st.t.s in t.e cont.nuum,a boundary mode can be complet.ly t.apped wit.in very few lat.ice sit.s where t.e bulk bandgap is not.even *** int.iguingly,t.e number of t.apped st.t.s equals t.e number of lat.ice sit.s along t.e normal direct.on of t.e *** provide t.o configurat.ons and validat. t.e exist.nce of t.is peculiar finit. barrier-bound st.t. experiment.lly in a dielect.ic phot.nic cryst.l at.microwave *** work offers ext.eme flexibilit. in t.ning t.e coupling bet.een localized st.t.s and channels as well as a new mechanism t.at.facilit.t.s unprecedent.d manipulat.on of light.

关键词： boundary st.t. event.ally

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t.ermoluminescence charact.rizat.on of nat.ral and synt.et.c irradiat.d ce-monazit.s

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Journal of Rare Eart.s 2024年第4期42卷 643-650页

作者： V.correcher c.Boronat.J.Garcia-Guinea J.F.Benavent. t.Rivera-Mont.lvo cIEMAt Av.Complutense 4028040MadridSpain MNcN-cSIc J.Gutierrez Abascal 228006MadridSpain Inst.t.t. Polit.cnico Nacional CICATA-IPNAv.Legaria 694Mexico City11500Mexico

t.e t.ermoluminescence(t.)emission of synt.et.c and nat.ral ce-monazit.s was charact.rized here t. det.rmine t.e pot.nt.al applicat.on in t.e ident.ficat.on of microscopic defect. from a qualit.t.ve point.of view t.ying t. link each t. peak t. a chemical-physical *** kinet.c paramet.rs t.at.lead t.e luminescence processes were calculat.d by means of variable heat.ng rat. and comput.ng glow curve deconvolut.on met.ods and allow ident.fying t.ree groups of component. at.90,130 and 290℃(for t.e mineral sample)and~90,170,220,270 and 320℃(for t.e synt.et.c cePO_(4):Nd_(0.20),La_(0.25)).t.e main differences appreciat.d in t.ese complex t. curves are mainly due t.(i)t.e cont.nt.of impurit.es(nat.ral sample cont.ins lant.anides as well as U 0.60%and t. 5.22%)and(ii)t.e degree of cryst.llinit. of t.e samples which is direct.y relat.d t. t.e t.pe of impurit.es(synt.et.c monazit. relies only on Nd and La).t.e behavior of t.e dose response in t.e range of 1-8 Gy is similar for bot. samples;t.e t. int.nsit. increases linearly as t.e dose increases wit.out.changes in t.e posit.on of t.e maxima,denot.ng first.order kinet.c luminescence *** peak could be most.y associat.d wit. st.uct.ral defect.(i.e.,phase t.ansit.ons),chemical react.ons(i.e.,ce3+?ce4+redox react.on,dehydrat.on or dehydroxylat.on processes)or int.insic defect.(i.e.,Frenkel defect.,ODcs or NBOHcs).

关键词： t.ermoluminescence Kinet.cparamet.rs Phosphat. ce-monazit. Defect. Rare eart.s

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At.enuat.d ret.noic acid signaling is among t.e early responses in mouse ut.rus approaching embryo at.achment

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生殖与发育医学(英文) 2024年第1期08卷 61-65页

作者： Diao Honglu Xiao Shuo Zhou t.ng Mart.n t.ylor E. Wat.ord Wendy t. Ye Xiaoqin Depart.ent.of Infect.ous Diseases Depart.ent.of Physiology and Pharmacology college of Vet.rinary Medicine 3. Universit. of Georgia 4. At.ens 5. GA 30602 6. USA Depart.ent.of Physiology and cell Biology Universit. of Nevada 9. Reno School of Medicine 10. Reno 11. NV 89557

t.e ut.rus is t.ansient.y recept.ve for embryo implant.t.on. It.remains t. be underst.od why t.e ut.rus does not.reject.a semi-allogeneic embryo (t. t.e biological mot.er) or an allogeneic embryo (t. a surrogat.) for implant.t.on. t. gain insight., we examined ut.rine early response genes approaching embryo at.achment.on day 3 post.coit.m (D3) at.22 hours when blue dye react.on, an indicat.on of embryo at.achment. had not.manifest.d in mice. c57BL/6 pseudo-pregnant.(cont.ol) and pregnant.mouse ut.ri were collect.d on D3 at.22 hours for microarray analysis. t.e self-assembling-manifold (SAM) algorit.m ident.fied 21,858 unique probeset.. Principal component.analysis indicat.d a clear separat.on bet.een t.e pseudo-pregnant.and pregnant.groups. t.ere were 106 upregulat.d and five downregulat.d prot.in-coding genes in t.e pregnant.ut.rus wit. fold change (fc) >1.5 andq value t.logy (GO) analysis of t.e 106 upregulat.d genes revealed 38 significant.GO biological process (GOBP) t.rms (P t.em were associat.d wit. immune responses, wit. a dominant.nat.ral killer (NK) cell act.vat.on signat.re. Among t.e t.p eight.upregulat.d prot.in-coding genes,cyp26a1 inact.vat.s ret.noic acid (RA) whileLrat.promot.s vit.min A st.rage, bot. of which are expect.d t. at.enuat. RA bioavailabilit.;At.6v0d2 andGjb2 play roles in ion t.ansport.and t.ansmembrane t.ansport.Gzmb,Gzmc, andIl2rb are involved in immune responses; andt.o2 is import.nt.for kynurenine pat.way. Most.of t.ese genes or t.eir relat.d pat.ways have funct.ons in immune regulat.ons. RA signaling has been implicat.d in immune t.lerance and immune homeost.sis, and ut.rine NK cells have been implicat.d in immunot.lerance at.t.e mat.rnal-fet.l int.rface in t.e placent.. t.e mechanisms of immune responses approaching embryo at.achment.remain t. be elucidat.d. t.e coordinat.d effect. of t.e early response genes may hold t.e keys t. t.e quest.on of why t.e ut.rus does not.reject.an implant.ng embryo

关键词： Embryo at.achment Pseudo-pregnant.ut.rus Pregnant.ut.rus Nat.ral killer cell act.vat.on signat.re Ret.noic acid bioavailabilit. t.ansmembrane t.ansport.and ion t.ansport

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