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Dyn.mically gen.rated res.n.n.es

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Chin.s. Phys.cs.C 2009年第12期33卷 1132-1139页

作者： E. Os.t A. Ramos.s. s.rkar 孙宝玺 M.J.Vicen.e Vacas.P. Gon.alez J. Vijan.e D. Jido T. s.kihara A. Martin.z-Torres.K. Khemchan.an. Departamen.o de Fís.ca Teórica an. IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Departamen. d'Es.ructura i Con.0}ituen.s.de la Matèria an. In.0}itut de Cièn.ies.del Cos.os Universitat de Barcelona 08028 Barcelona Spain Variable En.rgy Cyclotron.Cen.re 1/AF Bidhannagar Kolkata 700064 India In.0}itute of Theoretical Phys.cs College of Applied Sciences Beijing University of Technology Departamen.o de Fís.ca Atomica Molecular y n.clear an. IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Yukawa In.0}itute for Theoretical Phys.cs Kyoto University Kyoto 606-8502 Japan Departmen. of Phys.cs Kyoto University Kyoto 606-8502 Japan Cen.ro de Fís.ca Computacion.l Departamento de Física Universidade de Coimbra P-3004-516 Coimbra Portugal

In.this.talk I report on.recen. work related to the dyn.mical gen.ration.of baryon.c res.n.n.es. s.me made up from ps.udos.alar mes.n.baryon. others.from vector mes.n.baryon.an. a third type from two mes.n.on. baryon.s.s.ems. We can.es.ablis. a corres.on.en.e with kn.wn.baryon.c res.n.n.es. rein.orcin. con.lus.on.0}previous.y drawn.an. brin.in. n.w light on.the n.ture of s.me baryon.c res.n.n.es.of higher mas..

关键词： dyn.mically gen.rated res.n.n.es chiral dyn.mics hidden.gauge formalis. for vector mes.n.n.eraction

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黑斑蛙之胚胎演发程序

科学 1950年第3期 90-91页

作者：朱宁生刘建康

本文之目的在确定黑斑蛙(Ran. n.gromaculata)之正常演发程序,将其划分为若干期,以利教学与研究工作。本试验所用之卵,係以蛙脑下腺注射入雌体,使其排卵,然後用人工受精法使之受精。试验过程中,卵均养育於18℃之水中。试验结果,显示黑... 详细信息

本文之目的在确定黑斑蛙(Ran. n.gromaculata)之正常演发程序,将其划分为若干期,以利教学与研究工作。本试验所用之卵,係以蛙脑下腺注射入雌体,使其排卵,然後用人工受精法使之受精。试验过程中,卵均养育於18℃之水中。试验结果,显示黑斑蛙在孵化前(1—19)期之发育速

关键词：黑斑蛙程序色素

s.ructural an. Magn.tic Properties.of Mn.lt;s.b>0.50-x</s.b>Zn.lt;s.b>0.50</s.b>Cu<s.b>x</s.b>Fe<s.b>2</s.b>O<s.b>4</s.b>

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Materials.s.ien.es.an. Application. 2013年第12期4卷 831-838页

作者： Farhad Alam Mohammad H. R. Khan.Hari n. Das.Akther A. K. M. Hos.ain Departmen. of Arts.an. s.ien.es Ahsanullah University of Science and Technology Dhaka Bangladesh Departmen. of Phys.cal s.ien.es School of Engineering and Computer Science Independent University-Bangladesh Dhaka Bangladesh Departmen. of Phys.cs Bangladesh University of Engineering and Technology Dhaka Bangladesh Materials.s.ien.e Divis.on Atomic Energy Centre BAEC Dhaka Bangladesh

Mn..50-xZn..50CuxFe2O4 (where x = 0.0 - 0.3) ferrites.have been.s.n.hes.zed by auto combus.ion.method. X-ray diffraction.pattern.0}reveal that all compos.tion.0}are of s.n.le phas. cubic s.in.l s.ructure. The lattice parameter decreas.s.with the in.reas. in.Cu2+ con.en. obeyin. the Vegard’s.law. The bulk den.0}ty, average grain.s.ze, in.tial permeability, n.el temperature an. s.turation.magn.tic in.uction.of Mn..50-xZn..50CuxFe2O4 in.reas.d with in.reas.n. Cu2+con.en.. It is.obs.rved that both den.0}ty an. in.tial permeability in.reas. with in.reas.n. s.n.erin. temperature. The maximum in.tial permeability is.foun. to be 1061 which is.almos. four times.greater than.that of the paren. compos.tion. The res.n.n.e frequen.y of all the s.mples.s.ifts.towards.the lower frequen.y as.the permeability in.reas.s.with Cu2+ con.en.. It is.obs.rved from B-H loops.of Mn..50-xZn..50CuxFe2O4 that coercivity decreas.s.an. reten.ivity in.reas.s.with Cu2+ con.en.. Pos.ible explan.tion.0}for the obs.rved magn.tic properties.with various.Cu2+ con.en.s.are dis.us.ed.

关键词： Combus.ion Method Mn.Cu-Zn Ferrites In.tial Permeability B-H Loop

Comparis.n.of Des.gn.an. An.lys.s.of Con.rete Gravity Dam

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n.tural Res.urces 2012年第1期3卷 18-28页

作者： Md. Hazrat Ali M. R. Alam M. n. Haque M. J. Alam Departmen. of Civil En.in.erin. Chittagong University of Engineering & Technology Chittagong Bangladesh

Gravity dams.are s.lid con.rete s.ructures.that main.ain.their s.ability again.0} des.gn.loads.from the geometric s.ape, mas. an. s.ren.th of the con.rete. The purpos.s.of dam con.0}ruction.may in.lude n.vigation. flood damage reduction. hydroelectric power gen.ration. fis. an. wildlife en.an.emen., water quality, water s.pply, an. recreation. The des.gn.an. evaluation.of con.rete gravity dam for earthquake loadin. mus. be bas.d on.appropriate criteria that reflect both the des.red level of s.fety an. the choice of the des.gn.an. evaluation.procedures. In.Ban.lades., the en.ire coun.ry is.divided in.o 3 s.is.ic zon.s. depen.in. upon.the s.verity of the earthquake in.en.0}ty. Thus. the main.aim of this.s.udy is.to des.gn.high con.rete gravity dams.bas.d on.the U.s.B.R. recommen.ation.0}in.s.is.ic zon. II of Ban.lades., for varyin. horizon.al earthquake in.en.0}ties.from 0.10 g - 0.30 g with 0.05 g in.remen. to take in.o accoun. the un.ertain.y an. s.verity of earthquake in.en.0}ties.an. con.0}an. other des.gn.loads. an. to an.lyze its.s.ability an. s.res. con.54}ion.0}us.n. an.lytical 2D gravity method an. fin.te elemen. method. The res.lts.of the horizon.al earthquake in.en.0}ty perturbation.s.gges. that the s.abilizin. momen.s.are foun. to decreas. s.gn.fican.ly with the in.remen. of horizon.al earthquake in.en.0}ty while dealin. with the U.s.B.R. recommen.ed in.tial dam s.ction. in.icatin. en.an.er to the dam s.ability, thus.larger dam s.ction.is.provided to in.reas. the s.abilizin. momen.s.an. to make it s.fe again.0} failure. The vertical, prin.ipal an. s.ear s.res.es.obtain.d us.n. An.0}s.5.4 an.lys.s.are compared with thos. obtain.d us.n. 2D gravity method an. foun. les. compares.to 2D gravity method, except the prin.ipal s.res.es.at the toe of the gravity dam for 0.10 g - 0.15 g. Although, it s.ems.apparen.ly that s.aller dam s.ction.may be s.fficien. for s.res. an.lys.s.us.n. An.0}s.5.4, it would n.t be pos.ible to achieve the required factors.of s.fety with s.aller dam s

关键词： Comparis.n Con.rete Gravity Dam Dam Failure Des.gn Earthquake In.en.0}ty Perturbation s.ability an. s.res.

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巴斯帕Ⅱ号-印度第一个私营工程

国际水力发电 1994年第9期46卷 8-12页

作者： s.K·贾殷 n.辛格韩一向世武

在印度，斋浦拉卡什工业局正在以私营协议开发巴斯帕Ⅱ号水电站工程，总工期57个月。本文介绍该工程的主要特性，包括筹资协议和施工方法。

关键词：私营印度筹资水电站工程工业协议工期施工方法

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氧同位素温度计校正

地质地球化学 1992年第6期20卷 36-41页

作者： R.n.Clayton.s.W.Kieffer 李培忠

矿物A和矿物B之间平衡的氧同位素分馏可表达成两个函数f_A和f_B之代数差,f_A和f_B是这两种矿物的简化同位素配分函数比(reduced is.topic partition.fun.tion.ratios.的对数。利用很宽的温度区间的实验室实验和统计热力学计算相结合的方... 详细信息

矿物A和矿物B之间平衡的氧同位素分馏可表达成两个函数f_A和f_B之代数差,f_A和f_B是这两种矿物的简化同位素配分函数比(reduced is.topic partition.fun.tion.ratios.的对数。利用很宽的温度区间的实验室实验和统计热力学计算相结合的方法,获得了这些函数。对几种主要的造岩矿物,以下多项式在温度高于400K时非常接近于这些矿物的简化同位素配分函数比:方解石 f_(ca)=11.781x-0.420x^2+0.0158x^3石英 f_(Qz)=12.116x-0.370x^2+0.0123x^3钠长石 f_(Ab)=11.134x-0.326x^2+0.0104x^3钙长石 f_(An.=9.993x-0.271x^2+0.0082x^3透辉石 f_(Di)=9.237x-0.199x^2+0.0053x^3镁橄榄石 f_(Fo)=8.326x-0.142x^2+0.0032x^3磁铁矿 f_(Mt)=5.674x-0.038x^2+0.0003x^3式中 x=10~6T^(-2)(T用K度量)。

关键词：氧同位素温度计

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Predis.os.n. factors.effects.on.mortality of oak (Quercus. an. hickory (Carya) s.ecies.in.mature fores.s.un.ergoin. mes.phication.in.Appalachian.Ohio

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Fores. Ecos.s.ems 2021年第1期8卷 81-94页

作者： Don.C.Radcliffe David M.Hix s.ephen.n.Matthews s.hool of En.iron.en. an. n.tural Res.urces The Ohio State University2021 Coffey RoadColumbus OH 43210USA s.hool of En.iron.en.al an. Fores. s.ien.es University of WashingtonBox 352100Seattle WA 98195-2100USA

Backgroun.:Mature oak(Quercus.s.p.)an. hickory(Carya s.p.)trees.are gradually bein. replaced by more s.adetoleran. tree s.ecies.acros. the eas.ern.U.s.,likely due to fire s.ppres.ion.an. in.reas.d *** an. hickories.are highly valuable to wildlife;therefore,s.udyin. their mortality pattern.0}can.provide in.ormation.on.the lon.evity of habitat quality for man. an.mal *** mortality has.mos. often.been.s.udied followin. large oak declin. even.s.but backgroun. mortality rates.in.fores.s.with agin. oak an. hickory can.pies.warran. equal atten.ion.es.ecially in.the con.ext of wides.read oak an. hickory regen.ration.***:We s.udied backgroun. mortality rates.of five oak an. on. hickory s.ecies.over a 23–25 year time period(1993–1995 to 2018),us.n. 821/20th hectare perman.n. plots.on.the Marietta Un.t of the Wayn. n.tion.l Fores. in.s.utheas.ern.*** calculated mortality rates.bas.d on.remeas.remen. of in.ividual trees.for white oak(Quercus.alba),ches.n.t oak(Quercus.mon.an.),n.rthern.red oak(Quercus.rubra),black oak(Quercus.velutin.),s.arlet oak(Quercus.coccin.a),an. pign.t hickory(Carya glabra).For each of thes. s.ecies.other than.s.arlet oak,we als. modeled the relation.0}ips.of mortality probability with a priori topographic,s.il,s.an. s.ructural,an. in.ividual tree covariates.us.n. a mixed-effects.logis.ic regres.ion.***:The s.ecies.with the highes. mortality rate was.s.arlet oak(61.3%),followed by n.rthern.red oak(41.4%),black oak(26.7%),pign.t hickory(23.9%),white oak(23.4%),an. ches.n.t oak(19.1%).In.our models.n.rthern.red oak mortality was.as.ociated with more mes.c s.ope pos.tion.0}s.allower s.lums.more acidic s.ils.an. older s.an. *** hickory an. ches.n.t oak mortality rates.were as.ociated with higher bas.l areas.on.the plot,while white oak mortality s.owed the oppos.te ***:Our data s.gges. that red oak s.bgen.s.trees.in.mature fores.s.of our area will become in.reas.n.ly un.ommon.relative t

关键词： Mortality Quercus Carya Mes.phication Wildlife habitat

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The us. of remote s.n.0}n. to detect the con.0}quen.es.of eros.on.in.gyps.ferous.s.ils

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In.ern.tion.l s.il an. Water Con.0}rvation.Res.arch 2020年第4期8卷 383-392页

作者： Maria Jos. Marques.An. Alvarez Pilar Carral Blan.a s.s.re Ramón.Bien.s Geology an. Geochemis.ry Departmen. Autonomous University of MadridCalle Francisco Tomás y Valiente728040MadridSpain Departmen. of Applied Res.arch an. Agrarian.Exten.0}on IMIDRAFinca El Encín.Carretera A-2Km 38.8.Alcaláde Henares28800MadridSpain

Tillage practices.on.s.opin. groun. often.res.lt in.un.0}s.ain.ble s.il los.es.impairin. s.il fun.tion.0}s.ch as.crop productivity,water an. n.trien.s.s.orage,an. s.il organ.c carbon.s.C)s.ques.ration.A s.opin. olive grove(10%)was.plan.ed in.s.allow gyps.ferous.s.ils.in.*** was.man.ged by min.mum tillage;the mos. frequen. man.gemen. practice in.cen.ral *** con.0}quen.es.of eros.on.were s.udied in.s.il s.mples.at 0-10,10-20,an. 20-30 cm depths.by an.lyzin. s.C,available water an. gyps.m con.en.,an. by detectin. s.ectral s.gn.tures.us.n. an.As. Fields.ecPro(R)VIs.*** Brightn.s. in.ex(BI),s.ape in.ex(FI),an. n.rmalized Differen.e Vegetation.In.ex(n.VI)were derived from the As. s.ectral s.gn.tures.an. from remote s.n.0}n.(s.n.in.l-2 image)*** developmen. of thes. youn. olive trees.was.es.imated from the meas.red diameter of the trun.s.17±18 cm diameter).In.20-30 cm of the s.il,the carbon.s.ock(38±18 Mg ha-1)as.well as.the available water con.en.(12±6%)was.s.arce,affectin. the productivity of the olive *** above-men.ion.d in.ices.obtain.d from the laboratory s.mples.an. the pixels.of the s.n.in.l-2 image were s.gn.fican.ly(pn.coefficien. of aroun. *** BI was.related to the gyps.m con.en. an. the s.ope of the *** FI was.related to the carbon.an. water *** n.VI derived from the s.tellite image iden.ified the in.luen.e of s.il degradation.on.the trees.an. the carbon.*** s.atialtemporal chan.es.of the in.ices.might help in.trackin. s.il chan.es.over time.

关键词： Tillage Eros.on n.VI Gyps.m Remote s.n.0}n. s.il color

Effects.of Morphological In.egrity of s.con.ary Feather on.Their Drag Reduction.in.Pigeon.

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Journ.l of Bion.c En.in.erin. 2022年第5期19卷 1422-1438页

作者： Qian.Li Huan.s.en.Qin.fei Han.Aihon. Ji Zhen.on. Dai s.an.s.av n.Gorb In.0}itute of Bio-In.0}ired s.ructure an. s.rface En.in.erin. College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and Astronautics29 Yudao StreetNanjing 210016China Departmen. of Fun.tion.l Morphology an. Biomechan.cs Kiel UniversityAm Botanischen Garten 924118 KielGermany

Flight feathers.of birds.in.eract with the air flow durin. *** the obs.rved low drag an. high lift values.at win. s.eeds.from 9.0 to 19.8 m/s.can.be achieved due to the feather aerodyn.mics.remain.0}*** the pres.n. paper,we tes.ed an. compared morphological chan.es.drag reduction.an. flow vis.alization.res.lts.of in.act,damaged,an. artificial feathers.at differen. win. s.eeds.in.a win. *** the an.lys.s.of the drag force an. res.ltan. force an.le,we proved that the in.egrity of feathers.whos. barbs.are us.ally clos.ly in.ercon.ected,played an.importan. role in.the drag,which poten.ially triggers.excellen. drag reduction.*** win. tun.el tes.s.in.icated that in.act s.con.ary feathers.had a s.rpris.n.ly high maximum drag reduction.property at v?=?9 m/s.compared with the feathers.where the in.egrity of barbs.was.*** hook cas.ades.facilitated elas.icity un.er pres.ure an. s.itable permeability in.an.in.act feather,when.the hooks.were *** was.in.icated that the s.itable permeability of in.act feathers.would preven. flow s.paration.an. reduce drag force at low win. s.eed;at high win. s.eed,elas.icity un.er pres.ure an. s.itable permeability in.an.in.act feather would facilitate s.ron. s.ueezin. effect,helpin. feathers.withs.an. larger aerodyn.mic forces.to which they might be s.bjected durin. *** was.revealed that the in.act s.con.ary feather is.a compromis. between.s.ron. lift gen.ration.an. drag reduction.which has.a great s.gn.fican.e for the bird’s.flight.

关键词： Morphological in.egrity s.con.ary feather Drag reduction Win. tun.el s.oke vis.alization Bioin.0}iration