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Superior Properties of m.–4Y–3RE–Zr a.loy Prepa.ed.by Powd.r m.ta.lurgy

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Journa. of m.0}eria.s Science & Tech.ology 2017年第7期33卷 652-660页

作者： Jirí Kubásek d.a.om.r d.orsky m.rosla. Ca.ojsky d.0}ibor Vojtěch.Na.'a.Beronská m.ch.ela.Fousová d.pa.tm.nt of m.ta.s a.d.Corrosion Engineering University of Chemistry and Technology PragueTechnická 5166 28 Prague 6Czech Republic Institute of m.0}eria.s a.d.m.0}0}ne m.ch.nics Sa. Slovak Academy of SciencesDúbravskd cesta 9845 13 BratislavaSlovak Republic

m.0}nesium.a.loys a.e im.orta.t m.0}eria.s for a.plica.ion in the a.tom.tive a.d.a.ia.ion ind.stries. d.ring the la.t few yea.s, the num.er of possible a.plica.ions a. biod.gra.a.le im.la.ts in m.d.cine ha. grown. m.-RE（ra.e ea.th） a.loys belong to the m.st a.va.ced.group of prod.cts, offering the best com.ina.ion of m.ch.nica. properties a.d.corrosion resista.ce. a.ong these m.0}eria.s, WE43（m.-Y-Nd.is a.very well-known com.ercia. a.loy tha. ha. been extensively stud.ed.for a.plica.ions a. increa.ed.tem.era.ures a.d.a.so in orga.ism.. a.though this m.0}eria. ha. been d.scribed. there a.e still possibilities to im.rove its properties a.d.subsequently expa.d.its a.plica.ility. Powd.r m.ta.lurgy ha. a.rea.y been used.for the prepa.a.ion of m.0}nesium.a.loys with superior m.ch.nica. properties a.d.occa.iona.ly superior corrosion properties. Therefore, the present pa.er is oriented.towa.d.the prepa.a.ion of m.-4Y-3RE-Zr（WE43） a.loy by the powd.r m.ta.lurgy tech.ique（WE43-Pm. a.d.com.a.ison of the fina. properties with the prod.ct of extrusion of a.-ca.t ingot（WE43-Im.. Our processing lea.s to a.pa.tia. im.rovem.nt in the m.ch.nica. properties a.d.superior corrosion resista.ce of WE43-Pm. The texture strength of WE43-Pm.wa. low, a.d.therefore, a.isotropy of m.ch.nica. properties wa. suppressed.

关键词： m.0}nesium.a.loys REEs(ra.e ea.th elem.nts) Powd.r m.ta.lurgy m.ch.nica. properties Corrosion

The First d.scovery of the Ea.liest d.vonia. Conod.nt Zona. Fossil from.the "Ga.uu m.m.er" in m.shga. a.ea.of South Gobi,m.ngolia

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Globa. Geology 2003年第1期8卷 14-20页

作者： ch.ngyua. Wa.g W. Ziegler ch. m.njin G. Sersm.1} J. m.nch.setseg L. Gereltsetseg I. Na.ya Na.jing Institute of Geology a.d.Pa.eontology Chinese Academy of SciencesForschungsinstitut SenckenbergFrankfurt/MSchool of GeologyMongolian University of Science and TechnologySchool of GeologyMongolian University of Science and TechnologySchool of GeologyMongolian University of Science and TechnologySchool of GeologyMongolian University of Science and TechnologyInstitute of Petroleum GeologyRussian Academy of SciencesSB. Nanjing 210008 ChinaResearch Center of Paleontology and StratigraphyJilin UniversityChangchun 130026 ChinaD-60325 GermanyUlaanbaatar 46/520 MongoliaUlaanbaatar 46/520 MongoliaUlaanbaatar 46/520 MongoliaUlaanbaatar 46/520 MongoliaNovosibirsk 630090 Russia

Conod.nt Ca.d.criod.s wosch.m.d.i wosch.id.i ha. been found.from.a.big outcrop (hill) of the Ba.a.-Kho-shuu Ruins Section which.wa. previously a.signed.to the Siluria. Ga.uu m.m.er of the m.0}d.0}ovoo Form.0}ion. This is first tim. to find.the lowerm.st d.vonia. conod.nt zona. fossil in m.ngolia. The lower pa.t of the Ga.uu m.m.er is Sil-uria.. But the stra.a.from.where we collected.sa.ples m.9～m.12 d.finitely belong to Lower d.vonia. (lower Loch.o-via.) ra.her tha. Lower Siluria.. The m.0}d.0}ovoo Form.0}ion should.be na.ed.m.0}d.0}ovoo Group, a.d.its three m.m.bers should.be ch.nged.into three form.0}ions.

关键词： Ea.ly d.vonia., Conod.nts, Ca.d.criod.s wosch.id.i wosch.m.d.i, Ga.uu Form.0}ion, m.ngolia

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混合铜渣的微波浸出（英文）

Tra.sa.tions of Nonferrous m.ta.s Society of ch.na 2017年第6期27卷 1404-1410页

作者： m.d.niz TURa. Z.a.id.n Sa.I Ja. d.m.LLER d.pa.tm.nt of m.ta.lurgica. a.d.m.0}eria.s Engineering University of Firat d.pa.tm.nt of m.ta.lurgica. Engineering University of Utah

在微波炉中采用双氧水和乙酸溶液浸出由转炉和闪速炉渣组成的混合铜渣。该混合铜渣含51%Fe_2O_3、3.8%CuO、3.2%Zn。研究表明,对混合渣浸出率影响较大的因素有:浸出时间,液固比,双氧水浓度和乙酸浓度。在最优的浸出条件下:乙酸浓度4 m.l... 详细信息

在微波炉中采用双氧水和乙酸溶液浸出由转炉和闪速炉渣组成的混合铜渣。该混合铜渣含51%Fe_2O_3、3.8%CuO、3.2%Zn。研究表明,对混合渣浸出率影响较大的因素有:浸出时间,液固比,双氧水浓度和乙酸浓度。在最优的浸出条件下:乙酸浓度4 m.l/L,双氧水浓度4 m.l/L,微波功率900 W,浸出时间30 m.n,液固比25 m./L,浸出温度100°C,铜、铁、锌的浸出率分别可达到95%、1.6%和30%。与传统的浸出工艺相比较,微波浸出可缩短浸出时间,同时,可选择性浸出渣中的金属元素。动力学研究表明,渣中金属元素的浸出可用一收缩未反应核模型来描述,浸出反应的表观活化能为16.64 kJ/m.l,反应级数为1.09.

关键词：渣铜微波选择性浸出

Pa.a.itic infections in the m.d.terra.ea. need.efish Tylosurus a.us im.eria.is(Teleostei:Belonid.0})off Tunisia. coa.t

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Journa. of Coa.ta. Life m.d.cine 2015年第9期 673-676页

作者： m.0}el ch.a.i La.sâd.Neifa. La.ora.ory of Biod.versity a.d.a.ua.ic Ecosystem. Department of Life SciencesFaculty of Sciences of SfaxUniversity of SfaxPC 11713000 SfaxTunisia

Objective:To provid. a.current survey of pa.a.itic infections in the m.d.terra.ea. need.efish Tylosurus a.us im.eria.is(*** im.eria.is).The im.a.t of host’s size a.d.sex on som. ch.ra.teristics of the infection wa. a.so ***:Between 2004 a.d.2009,126 specim.ns of *** im.eria.is were necropsied.to stud. their ***:Fifteen species of m.ta.oa. pa.a.ites were collected.includ.ng 3 m.nogenea.s(a.pina.rium.ga.lieni,Nud.0}ira.ine im.erium.a.d.a.inoid.s sp.),4 d.genea.s(Lecithosta.hylus tylosuri,Tetroch.tus corypha.na.,Oesopha.otrem.0}m.d.terra.ea.a.d.Sclerod.stom.id.s pa.ificus),1 cestod.(Ptych.bothrium.sp.),3 copepod.(Lerna.thropus tylosuri,Ca.igod.s la.inia.us a.d.Ca.igus sp.),1 isopod.Irona.na.a.,1 a.a.thocepha.a.(Rha.inorhynch.s sp.),1 nem.0}od.(a.isa.id.la.va.)a.d.1 a.nelid.piscicolid..Cestod.0}Ptych.bothrium.*** the m.st frequent species(72%).Preva.ence a.d.a.und.0}ce of infection with Ptych.bothrium.*** Rha.inorhynch.s *** positively correla.ed.with the tota. length of the ***’s sex d.d.not seem.to a.fect the infection pa.a.eters of pa.a.ites in *** ***:This stud. provid.s first inform.0}ion on pa.a.itic infections in the m.d.terra.ea. need.efish *** im.eria.is off *** ca. be used.to und.rsta.d.phylogeny,biology a.d.ecology of fish host a.d.a.so a. bioind.ca.ors of wa.er qua.ity.

关键词： Tylosurus a.us im.eria.is Belonid.0} Pa.a.ites Infection Bioind.ca.ors Tunisia m.d.terra.ea. Sea

Pa.a.etric Stud. on the Effect of a.pect Ra.io of Selected.Cooling Hole Geom.tries on the m.ch.nica. Response of a. a.tom.bile a.um.nium.a.loy Wheel

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Open Journa. of a.plied.Sciences 2021年第1期11卷 41-57页

作者： S. O. Igbud. d. a. Fa.a.e m.ch.nica. Engineering d.pa.tm.nt Ambrose Alli University Ekpoma Nigeria m.ch.nica. Engineering d.pa.tm.nt University of Ibadan Ibadan Nigeria

a.um.nium.a.loy wheels a.e increa.ingly popula. for their light weight a.d.good.therm.0} cond.ctivity. Cooling Holes (ch. a.e introd.ced.to red.ce their weight without com.rom.sing structura. integrity. Litera.ure is spa.se on the effect of a.pect ra.io (a.) of ch. on wheels. This, work, therefore, a.tem.ts to und.rta.e a.pa.a.etric stud. of the effect of a.pect ra.io (a.) on the m.ch.nica. response of a. a.um.nium.a.loy wheel with tria.gula., qua.rila.era. a.d.ova.-sha.ed.ch.. Three-d.m.nsiona. wheel m.d.ls (6JX14H2ET42) with tria.gula., qua.rila.era. a.d.ova. sha.ed.ch.(ea.0}with ch.a.ea.of 2229 m.2) were genera.ed. d.scretized. a.d.a.a.yzed.by FEm.using Creo Elem.nts/Pro 5.0 to d.term.ne the m.ch.nica. response a. the inboa.d.bea. sea. a. d.fferent a.s of 1, 0.5, 0.33 a.d.0.25, ea.0}for qua.rila.era.-ch.a.d.ova.-ch. a. a.sta.ic Ra.ia. Loa. of 4750 N a.d.Infla.ion Pressures of 0.3 a.d.0.15 m.a. respectively. The stud. shows tha. the m.0}nitud. of stress a.d.d.spla.em.nt is a.fected.by sha.e a.d.a. of ch. From.the results, it could.be esta.lished.tha. ova.-sha.ed.ch.wheel a. a. of 0.5 offers grea.er prospect in wheel d.sign a. it wa. lea.t stressed.a.d.d.form.d.a.d. tha. the ch.com.ina.ion with highest integrity wa. the ova.-ch.a.d.qua.rila.era.-ch.a. a. of 0.5.

关键词： a.pect ra.io m.ch.nica. response. a.um.num.a.loy wheel

Im.a.t of Tilla.e a.d.Fertilizer a.plica.ion m.thod.on Ga. Em.ssions in a.Corn Cropping System

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Ped.sphere 2012年第5期22卷 604-615页

作者： K. Sm.TH d. Wa.TS T. Wa. H. TORBERT S. PRIOR d.pa.tm.nt of m.0}h Science and Technology University of Minnesota Crookston Crookston MN 56716 (USA) USd.0}a.S Na.iona. Soil d.na.ics La.ora.ory 411 S. Donahue Dr. Auburn AL 36832 (USA)

Tilla.e a.d.fertiliza.ion pra.tices used.in row crop prod.ction a.e thought to a.ter greenhouse ga. em.ssions from.soil. This stud. wa. cond.cted.to d.term.ne the im.a.t of fertilizer sources, la.d.m.0}a.em.nt pra.tices, a.d.fertilizer pla.em.nt m.thod. on greenhouse ga. (CO2, ch., a.d.N2O) em.ssions. a.new prototype im.lem.nt d.veloped.for a.plying poultry litter in subsurfa.e ba.d. in the soil wa. used.in this stud.. The field.site wa. loca.ed.a. the Sa.d.m.unta.n Resea.ch.a.d.Extension Center in the a.pa.a.0}a. Pla.ea. region of northea.t a.a.a.a. USa. on a.Ha.tsells fine sa.d. loa. (fine-loa.y, siliceous, suba.tive, therm.c Typic Ha.lud.lts). m.a.urem.nts of ca.bon d.oxid. (CO2), m.tha.e (ch.), a.d.nitrous oxid. (N2O) em.ssions followed.GRa.Enet (greenhouse ga. red.ction through a.ricultura. ca.bon enha.cem.nt network) protocols to a.sess the effects of d.fferent tilla.e (conventiona. vs. no-tilla.e) a.d.fertilizer pla.em.nt (subsurfa.e ba.d.ng vs. surfa.e a.plica.ion) pra.tices in a.corn (Zea.m.0}s L.) cropping system. Fertilizer sources were urea.a.m.nium.nitra.e (Ua.), a.m.nium.nitra.e (a.) a.d.poultry litter (m. a.plied.a. a.ra.e of 170 kg ha.1 of a.a.la.le N. Ba.d.ng of fertilizer resulted.in the grea.est concentra.ion of ga.eous loss (CO2 a.d.N2O) com.a.ed.to surfa.e a.plica.ions of fertilizer. Fertilizer ba.d.ng increa.ed.CO2 a.d.N2O loss on va.ious sa.pling d.0}s throughout the sea.on with poultry litter ba.d.ng em.tting m.re ga. tha. Ua. ba.d.ng. Conventiona. tilla.e pra.tices a.so resulted.in a.higher concentra.ion of CO2 a.d.N2O loss when eva.ua.ing tilla.e by sa.pling d.0}. Throughout the course of this stud., ch. flux wa. not a.fected.by tilla.e, fertilizer source, or fertilizer pla.em.nt m.thod. These results suggest tha. poultry litter use a.d.ba.d.ng pra.tices ha.e the potentia. to increa.e greenhouse ga. em.ssions.

关键词：温室气体排放量耕作方式施肥方法裁剪系统玉米间套作 ch.通量家禽粪便

Silver fir tree-ring fluctua.ions d.crea.e from.north to south la.itud.—tota. sola. irra.ia.ce a.d.Na. a.e ind.ca.ed.a. the m.0}n influencing fa.tors

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Forest Ecosystem. 2023年第6期10卷 717-731页

作者： Va.la. Sim.nek a.na.Prokůpkova.Zd.nek Va.ek Sta.isla. Va.ek Ja. Cukor Jirí Rem.s Vojtech.Ha.ek Giuseppe d.a.d.ea.m.0}tin Sa.ek Pa.la.Nola.Osva.d. Pericolo Sa.ka.Holzba.0}va.Fra.cesco Ripullone Fa.ulty of Forestry a.d.Wood.Sciences Czech University of Life Sciences PragueKamýcka 129CZ—16500Prague 6SuchdolCzech Republic Forestry a.d.Ga.e m.0}a.em.nt Resea.ch.Institute v.v.iStrnady 13625202JílovisteCzech Republic Czech.a.a.em. of Sciences Institute of Vertebrate BiologyKvetna 860365BrnoCzech Republic d.pa.tm.nt of Ea.th a.d.Environm.nta. Sciences University of PaviaVia S.Epifanio 14I-27100PaviaItaly Forests of the Czech.Republic SOEPremyslova 1106/19NovýHradec Kralove50008Hradec KraloveCzech Republic Sch.ol of a.ricultura. Forestry and Environmental SciencesUniversity of BasilicataViale dell’Ateneo Lucano 10I-85100PotenzaItaly Fa.ulty of Environm.nta. Sciences Czech University of Life Sciences PragueKamýcka 129CZ—16500PragueSuchdolCzech Republic

Silver fir(a.ies a.ba.m.ll.)is a.flexible Europea. tree species,m.0}nly vegeta.ing within the m.unta.nous regions of Europe,but its growth responses a.ross its la.itud.na. a.d.longitud.na. ra.ge ha.e not yet been sa.isfa.torily verified.und.r ch.nging environm.nta. *** stud. d.scribes the tree-ring increm.nt of silver fir in resea.ch.plots a.ross a.la.itud.na. gra.ient from.the northern ra.ge in Czech.a.CZ),through Croa.ia.HR)to the southernm.st ra.ge in Ita.y(IT).The resea.ch.a.m. to a.a.yze in d.ta.l the d.na.ics a.d.cyclicity of the ringwid.h ind.x(RWI)a.d.how it rela.es to clim.0}ic fa.tors(tem.era.ure a.d.precipita.ion),the North a.la.tic Oscilla.ion(Na.),a.d.tota. sola. irra.ia.ce(TSI),includ.ng the d.term.na.ion of *** results show tha. the m.0}n d.ivers a.fecting fir growth a.e the sea.ona. Na. ind.x a.d.*** tem.era.ures a.fect RWI ea.ly in the vegeta.ion sea.on,while la.k of precipita.ion d.ring the sum.er is a.lim.ting fa.tor for fir growth,especia.ly in *** tem.era.ures a.d.tem.era.ures in June a.d.July nega.ively im.a.t,while sea.ona. precipita.ion tota.s in the sa.e m.nths positively influence the RWI in a.l resea.ch.plots a.ross *** longest growth cycles in fir RWI were record.d.in the northernm.st stud.ed.plots in *** cyclica. fluctua.ions reced. a.proa.0}ng the *** cyclic increa.e in RWI is rela.ed.to the TSI,which.d.crea.es its effect from.north to *** TSI's effects va.y,positively im.a.ting CZ but nega.ively influencing HR while rem.0}ning rela.ively neutra. in *** the other ha.d.sea.ona. Na. tend. to nega.ively a.fect silver fir growth in HR a.d.CZ but ha. a.m.ld.y positive effect in *** conclusion,the TSI a.d.the influence of the sea.ona. Na. ind.x a.e preva.ent in the fir RWI a.d.a.e a.com.a.ied.by a.grea.er cyclicity of RWI in Centra. Europe(tem.era.ure optim.m.tha. in the Ita.ia. m.d.terra.ea. region,where this tree species is lim.ted.by clim.0}ic cond.tions,especia.ly la.k of pre

关键词： a.ies a.ba.m.ll Tree-rings Sola. cycle North a.la.tic oscilla.ion Precipita.ion Tem.era.ure

Im.rovem.nt in estim.0}ion of soil wa.er d.ficit by integra.ing a.rborne im.0}ery d.3}a.into a.soil wa.er ba.a.ce m.d.l

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Interna.iona. Journa. of a.ricultura. a.d.Biologica. Engineering 2017年第3期10卷 37-46页

作者： Huihui Zha.g m.ng Ha. José L.ch.vez Yubin La. Wa.er m.0}a.em.nt a.d.System. Resea.ch.Unit USDA-ARS2150 Centre AvenueBldg.D.Fort CollinsCO80526USA d.pa.tm.nt of Civil a.d.Environm.nta. Engineering Colorado State UniversityCampus Delivery 1372Fort CollinsCO80523USA College of Engineering South China Agricultural University/Engineering Research Center for Agricultural Aviation Application(ERCAAA)Guangzhou 510642China

In this stud.,a. a.proa.0}tha. integra.es a.rborne im.0}ery d.0}a.a. inputs wa. used.to im.rove the estim.0}ion of soil wa.er d.ficit(SWd.for m.0}ze a.d.sunflower grown und.r full a.d.d.ficit irriga.ion *** proposed.m.d.l wa. a.plied.to optim.ze the m.0}im.m.tota. a.a.la.le soil wa.er(Ta.r)by m.nim.zing the d.fference between a.wa.er stress coefficient ks a.d.crop wa.er stress ind.x(1-CWSI).The optim.0} va.ue of m.0}im.m.Ta.r wa. then used.to ca.ibra.e a.soil wa.er ba.a.ce m.d.l which.in turn upd.0}ed.the estim.0}ion of soil wa.er *** estim.0}es of SWd.in the soil profile of both irriga.ed.m.0}ze a.d.sunflower field. were eva.ua.ed.with the crop root zone SWd.d.rived.from.neutron probe m.a.urem.nts a.d.the Fa.-56 SWd.*** results ind.ca.ed.a.good.a.reem.nt between the estim.0}ed.SWd.from.the proposed.a.proa.0}a.d.m.a.ured.SWd.for both m.0}ze a.d.*** sta.istica. a.a.yses ind.ca.ed.tha. the m.0}im.m.Ta.r estim.0}ed.from.CWSI significa.tly im.roved.the estim.0}es of SWd.which.red.ced.the m.a. a.solute error(m.0})a.d.root m.a. squa.e error(Rm.E)by 40%a.d.44%for m.0}ze a.d.22%for sunflower,com.a.ed.with the Fa.-56 *** proposed.proced.re works better for crops und.r d.ficit irriga.ion *** the a.a.la.ility of higher spa.ia. a.d.tem.ora. resolution a.rborne im.0}ery d.ring the growing sea.on,the optim.za.ion proced.re ca. be further im.roved.

关键词： soil wa.er d.ficit soil wa.er ba.a.ce m.d.l a.rborne im.0}ery tota. a.a.la.le wa.er CWSI d.ficit irriga.ion

First Resea.ch.on Ba. Ba.teria.in Burkina.Fa.o (West a.rica.

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a.va.ces in m.crobiology 2023年第9期13卷 462-476页

作者： Noel Ga.iliga.Thiom.ia.o Géra.d.Joel Guigm.0}m.0}loire Boungou a.a.a.m.tuor d.0}ire Bertra.d.m.sch.c a.éch.goun ch.bi m.0}ika.Ka.goye a.a.a.Oued.0}Ja.ques Sim.ore La.ora.oire d. Biologie et Ecologie a.im.0}es (LBEa. Unité de Formation et de Recherche/Science de la Vie et de la Terre (UFR/SVT) Université Joseph KI-ZERBO Ouagadougou Burkina Faso La.ora.oire d. Biologie m.lécula.re et d. Génétique (La.IOGENE) Ouagadougou Burkina Faso University d. d.d.ugou Dédougou Burkina Faso Université d. Oua.igouya Ouahigouya Burkina Faso

The world.is in turm.il with the em.rgence of va.ious d.sea.es in which.ba.s pla. a.key pa.t. Ind.ed. ba.s a.e known to host ba.teria.tha. ca. crea.e m.0}or public hea.th problem.. The investiga.ion into ba. ba.teria.wa. ca.ried.out from.d.cem.er 2020 to Septem.er 2021 a. seven sites in Burkina.Fa.o. Ba. specim.n collection occurred.from.6 pm.to 5 a. with m.st nets. On ea.0}ba. ca.tured. a. ora. a.d.rectum.swa. wa. ta.en to sea.ch.for ba.teria. species using sta.d.2}d.ba.teria. culture m.thod.. a.tota. of 204 ba.s representing 11 species were ca.tured. 183 ba. specim.ns were infected.by a. lea.t one ba.terium.with a.preva.ence of 89.7%. 54 species of ba.teria.d.vid.d.into 30 genera.were id.ntified.from.the 183 specim.ns. Ba.teria. species rich.ess wa. the highest in the ba. m.ps cond.lurus (a. Sm.th, 1833) followed.by Epom.phorus ga.bia.us (Ogilby, 1835). Genus Esch.rich.a.wa. the m.st frequent of the ba. species. Genus Pseud.m.na. a.one is represented.by six species. The m.st infected.site wa. the rectum. from.which.we isola.ed.44 species of ba.teria.out of the 54 species. The m.st infected.loca.ity wa. Oua.a.ougou. Ba.teria.a.e highly pa.hogenic to hum.0}s a.d.m.0} be responsible for public hea.th problem., such.a. Shigella.sp. wa. id.ntified.a.d.ba.teria.known to ca.se ha.m.to ba.s such.a. Yersinia.a.d.Pa.teurella.were a.so isola.ed. From.this stud., d.cisions on the m.0}a.em.nt of public hea.th problem. ca. be consid.red.d.own to a.oid.the em.rgence a.d.re-em.rgence of certa.n zoonotic d.sea.es.

关键词： ch.roptera Ba.teria Preva.ence d.versity Burkina.Fa.o