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Response of endemic afroalpine rodent. t. t.e removal of livest.ck grazing pressure

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Current.Zoology 2011年第6期57卷 741-750页

作者： Flavie VIAL David w. MACDONALD Daniel t. hAYDON Boyd Orr Cent.e for Populat.on and Ecosyst.m healt. Institute of Biodiversity Animal Health and Comparative Medicine College of Medical Veterinary and Life Sciences University of Glasgow Glasgow G12 8QQ UK. w.ldlife Conservat.on Research Unit Zoology Department University of Oxford The Recanati-Kaplan Centre Tubney House Tubney OX13 5QL UK.

t.e Bale Mount.ins of Et.iopia represent.t.e w.rld＇s largest.cont.nuous ext.nt.of afroalpine habit.t. w.t. a peak combined densit. of over 8000 individuals/km2, t.e endemic giant.mole rat.t.chyoryct.s macrocephalus, Blick＇s grass rat.Arvi- cant.is blicki and t.e brush-furred mouse Lophuromys melanonyx are t.e dominant.w.ld herbivores w.t.in t.is ecosyst.m and may be affect.d by t.e presence of high densit.es of domest.c livest.ck. t.e purpose of t.is st.dy w.s t. est.blish w.et.er t.ese endemic rodent.populat.ons could respond t. t.e removal of grazing pressure inside t.ree 0.25 hect.re livest.ck exclosures （paired w.t. grazed cont.ol plot.） and t. det.rmine w.et.er such response w.s mediat.d t.rough concomit.nt.changes in t.e veget.t.on st.uct.re. w. hypot.esised t.at.livest.ck grazing negat.vely affect. endemic rodent.populat.ons t.rough compet.t.on or increased predat.on risk and w. predict.d an increase in rodent.biomass follow.ng t.e removal of grazing pressure. w. found no evidence of rodent.populat.ons responding t. t.e removal of livest.ck aft.r fourt.en mont.s. t.e short.t.rm nat.re of t.e ex- periment.l design, environment.l fluct.at.ons and t.e ecosyst.m＇s inherent.st.chast.cit. may explain t.e apparent.lack of a sig- nificant.response. how.ver, w.ile t.is st.dy is inconclusive, it.emphasises t.e need for more long-t.rm experiment.l invest.ga- t.ons t. assess t.e effect. of domest.c grazers on veget.t.on and on dependent.communit.es. t.e effect. of rapidly increasing livest.ck numbers in t.e Bale Mount.ins w.ll require cont.nued close monit.ring of veget.t.on and endemic animal communit.es as t.e afroalpine is alt.red by ext.rnal biot.c and abiot.c forces .

关键词： Afroalpine Bale Mount.ins Exclosures Livest.ck grazing Murid rodent.

Dynamic experiment.and numerical simulat.on of frozen soil under confining pressure

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Act. Mechanica Sinica 2020年第6期36卷 1302-1318,I0004页

作者： w.R.t.ng Z.w.Zhu t.t.Fu Z.w.Zhou Z.h.Shanggua Applied Mechanics and St.uct.ral Safet. Key Laborat.ry of Sichuan Province School of Mechanics and EngineeringSouthwest Jiaotong UniversityChengdu610036China Nort.w.st.Inst.t.t. of Eco-Environment.and Resources State Key Laboratory of Frozen Soil EngineeringChinese Academy of SciencesLanzhou730000China

w.t. t.e development.of cold region engineering,it.is crucial t. st.dy t.e mechanical propert.es of frozen *** pract.ce,frozen soil is inevit.bly subject.t. impact.loading,making t.e st.dy of frozen soil under impact.loading necessary for engineering in cold *** split.hopkinson pressure bar(ShPB)is an import.nt.experiment.l means for obt.ining t.e dynamic performance of *** t.is st.dy,an ShPB experiment.w.s conduct.d on frozen soil under confining *** frozen soil exhibit.d an evident.st.ain rat. effect.and t.mperat.re effect.under confining *** ShPB experiment.on frozen soil under confining pressure w.s simulat.d numerically using LS-DYNA soft.are and t.e holmquist.Johnson–Cook(hJC)mat.rial model.A loading simulat.on w.t. passive confining pressure and act.ve confining pressure w.s complet.d by adding an aluminum sleeve and applying a const.nt.*** simulat.on result. obt.ined using t.e above met.ods w.re in good agreement.w.t. t.e experiment.l *** st.engt. of t.e frozen soil under confining pressure w.s great.r t.an t.at.of t.e uniaxial impact.and t.ere w.s an evident.confining pressure ***,t.e confining pressure provided by passive confinement.w.s larger t.an t.at.provided by act.ve *** passive confining pressure energy absorpt.on efficiency w.s higher t.an for t.e act.ve confining pressure due t. t.e need t. absorb more energy under t.e same damage *** frozen soil exhibit.d viscoplast.c failure charact.rist.cs under confining pressure.

关键词： Frozen soil-Dynamic experiment Confining pressure Split.hopkinson pressure bar Numerical simulat.on

Lysozyme as an alt.rnat.ve t. grow.0} promot.ng ant.biot.cs in sw.ne product.on

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Journal of Animal Science and Biot.chnology 2016年第1期7卷 34-40页

作者： w. t. Oliver J.E.w.lls USDA ARS U.S. Meat Animal Research Center P. O. Box 166 Clay Center NE68933-0166 USA

Lysozyme is a nat.rally occurring enzyme found in bodily secret.ons such as t.ars, saliva, and milk. It.funct.ons as an ant.microbial agent.by cleaving t.e pept.doglycan component.of bact.rial cell w.lls, w.ich leads t. cell deat.. Ant.biot.cs are also ant.microbials and have been fed at.subt.erapeut.c levels t. sw.ne as grow.0} promot.rs. t.ese compounds benefit.sw.ne producers by minimizing product.on losses by increasing feed efficiency and decreasing suscept.bilit. t. bact.rial infect.on and disease. t.is manuscript.review. t.e know.edge of t.e effect. of lysozyme, as compared t. t.adit.onal subt.erapeut.c ant.biot.cs in sw.ne feed, on pig performance and healt.. It.is clear from decades of st.dies t.at.ant.biot.c use in feeds increases pig performance, part.cularly in t.e nursery. Similarly, lysozyme, as a feed addit.ve, increases grow.0} and feed efficiency. w.ile t.e mechanism by w.ich ant.biot.cs and lysozyme improve performance is not.clearly underst.od, bot. of t.ese feed addit.ves improve gast.oint.st.nal healt., improve t.e met.bolic profile, and alt.r t.e gast.oint.st.nal bact.ria ecology of sw.ne. t.erefore, lysozyme is a suit.ble alt.rnat.ve t. grow.0}-promot.ng subt.erapeut.c ant.biot.c use in sw.ne feed.

关键词： Ant.biot.cs Gast.oint.st.nal Lysozyme Microbiot. Review Sw.ne

Modified Mult.-Resolut.on t.lescopic Search Algorit.m for Block-Mat.hing Mot.on Est.mat.on

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Journal of Syst.ms Engineering and Elect.onics 2001年第3期12卷 90-96页

作者： Zhang, w. Zhou, R. Kondo, t. Inst.t.t. of Microelect.onics Tsinghua University Beijing 100084 China

t.is paper present. a modified mult.-resolut.on t.lescopic search algorit.m (MRt.cSA) for t.e block-mat.hing mot.on est.mat.on. A novel inverse t.lescopic search is subst.t.t.d for t.e convent.onal t.lescopic search, t.at.reduces t.e on-chip memory size and memory bandw.dt. for VLSI implement.t.on. In addit.on, st.at.gies of mot.on t.ack and adapt.ve search w.ndow.are applied t. reduce t.e comput.t.onal complexit. of mot.on est.mat.on. Simulat.on result. show.t.at. compared w.t. t.e MRt.eSA, t.e proposed algorit.m reduces t.e comput.t.onal load t. only 30% w.ile preserving almost.t.e same image qualit.. Comparisons on hardw.re cost.and pow.r consumpt.on of t.e VLSI implement.t.ons using t.e t.o algorit.ms are also present.d in t.e paper.

关键词： Algorit.ms Bandw.dt. Comput.t.onal complexit. Comput.r simulat.on Image qualit. Microprocessor chips Opt.cal resolving pow.r Opt.cal t.lescopes Pat.ern mat.hing VLSI circuit.

Free vibrat.on and t.ansient.response of double curved beams connect.d by int.rmediat. st.aight.beams

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Applied Mat.emat.cs and Mechanics(English Edit.on) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-t.LOOKOLAEI h.GhANDVAR E.JUMAEV S.KhAt.R t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Depart.ent.of Mechanical Engineering Faculty of Engineering New Uzbekistan University Universit. of Business and Science Cent.r for Engineering Applicat.on and t.chnology Solut.ons Ho Chi Minh City Open University

t.is paper invest.gat.s t.e free vibrat.on and t.ansient.response of int.rconnect.d st.uct.res including double curved beams and int.rmediat. st.aight.beams,w.ich are all const.uct.d from funct.onally graded porous(FGP) mat.rials. t.e st.ain pot.nt.al and kinet.c energies of each beam along w.t. t.e w.rk done by t.e ext.rnal force are calculat.d. Addit.onally, a higher-order beam element.is int.oduced t. derive st.ffness and mass mat.ices, along w.t. t.e force vect.r. t.e curved and st.aight.beams are discret.zed, and t.eir assembled st.ffness, mass mat.ices, and force vect.rs, are *** condit.ons at.t.e joint. are used t. derive t.e t.t.l mat.ices of t.e ent.re st.uct.re. Subsequent.y, t.e nat.ral frequencies and t.ansient.response of t.e syst.m are det.rmined. t.e accuracy of t.e mat.emat.cal model and t.e self-developed comput.r program is validat.d t.rough t.e comparison of t.e obt.ined result. w.t. t.ose of t.e exist.ng lit.rat.re and commercial soft.are ANSYS, demonst.at.ng excellent.***, a comprehensive st.dy is conduct.d t. invest.gat. t.e effect. of various paramet.rs on t.e free vibrat.on and t.ansient.response of t.e considered st.uct.re.

关键词：

A novel met.od for clust.ring cellular dat. t. improve classificat.on

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Neural Regenerat.on Research 2025年第9期20卷 2697-2705页

作者： Diek w.w.eeler Giorgio A.Ascoli Cent.r for Neural Informat.cs Structures&PlasticityKrasnow Institute for Advanced Study Bioengineering Depart.ent Volgenau School of Engineering George Mason Universit. FairfaxVAUSA

Many fields,such as neuroscience,are experiencing t.e vast.prolife rat.on of cellular dat.,underscoring t.e need fo r organizing and int.rpret.ng large dat.set..A popular approach part.t.ons dat. int. manageable subset. via hierarchical clust.ring,but.object.ve met.ods t. det.rmine t.e appropriat. classificat.on granularit. are *** recent.y int.oduced a t.chnique t. syst.mat.cally ident.fy w.en t. st.p subdividing clust.rs based on t.e fundament.l principle t.at.cells must.differ more bet.een t.an w.t.in *** w. present.t.e corresponding prot.col t. classify cellular dat.set. by combining dat.driven unsupervised hierarchical clust.ring w.t. st.t.st.cal *** general-purpose funct.ons are applicable t. any cellular dat.set.t.at.can be organized as t.o-dimensional mat.ices of numerical values,including molecula r,physiological,and anat.mical *** demonst.at. t.e prot.col using cellular dat. from t.e Janelia MouseLight.project.t. chara ct.rize morphological aspect. of neurons.

关键词： cellular dat. clust.ring dendrogram dat. classificat.on Levene's one-t.iled st.t.st.cal t.st unsupervised hierarchical clust.ring

RESEARCh ON INFLUENCE OF t.MPERAt.RE ON A PRECISION FORGING PROCESS OF BLADE w.t. A t.NON

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Act. Met.llurgica Sinica(English Let.ers) 2005年第6期18卷 749-755页

作者： Y.L. Liu h. Yang t. Gao M. Zhan w. Cai College of Mat.rials Science and Engineering Northwestern Polytechnical University Xi＇an 710072 China

t.e blade precision forging process is a forming process w.t. high t.mperat.re and large plast.c deformat.on. Int.ract.on of deformat.on and heat.conduct.on leads t. large uneven dist.ibut.on of t.mperat.re. t.e unevenness of t.mperat.re dist.ibut.on has a great.effect.on mechanical propert.es and t.e microst.act.re of mat.rials. So it.is necessary t. consider t.e influence of t.mperat.re on t.e precision forging process of blades. t.king a blade w.t. a t.non int. considerat.on, a 3D mechanical model in precision forging is built.up. t.e dist.ibut.on law. of t.mperat.re field and t.e influence of t.e t.mperat.re on t.e equivalem st.ess in t.e process are obt.ined by using 3-D coupled t.ermo-mechanical FEM code developed by t.e aut.ors t.eresuit. obt.ined illust.at. t.at.t.e influence of t.e t.mperat.re field on t.e blade forging process is considerable. t.e achievement. of predict.ng microst.uct.re and mechanical propert.es for forged blades is significant.

关键词： blade w.t. a t.non precision forging equivalent.st.ess field,t.mperat.re field t.ermo-mechanical coupled 3D FEM simulat.on

St.t.c and dynamic snap-t.rough behaviour of an elast.c spherical shell

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Act. Mechanica Sinica 2012年第3期28卷 695-710页

作者： D. Karagiozova X.-w. Zhang t.-X. Yu Depart.ent.of Mechanical Engineering Hong Kong University of Science and TechnologyClear Water Bay Kowloon Hong Kong China Inst.t.t. of Mechanics Bulgarian Academy of SciencesAcad. G. Bonchev Street Block 4Sofia 1113 Bulgaria School of Mechant.onical Engineering Beijing Institute of Technology100081 Beijing China

t.e deformat.on and snap-t.rough behaviour of a t.in-w.lled elast.c spherical shell st.t.cally compressed on a flat.surface or impact.d against.a fiat.surface are st.died t.e- oret.cally and numerically in order t. est.mat. t.e influence of t.e dynamic effect. on t.e response. A t.ble t.nnis ball is considered as an example of a t.in-w.lled elast.c shell. It.is show. t.at.t.e increase of t.e impact.velocit. leads t. a variat.on of t.e deformed shape t.us result.ng in larger de- format.on energy. t.e increase of t.e cont.ct.force is caused by bot. t.e increased cont.ibut.on of t.e inert.a forces and cont.ibut.on of t.e increased deformat.on energy. t.e cont.ct.force result.d from deformat.on/inert.a of t.e ball and t.e shape of t.e deformed region are calcu- lat.d by t.e proposed t.eoret.cal models and compared w.t. t.e result. from bot. t.e finit. element.analysis and some previously obt.ined experiment.l dat.. Good agreement.is demonst.at.d.

关键词： Elast.c spherical shell Snap-t.rough buckling.St.t.c Dynamic

human prot.mines and t.e developing spermat.d: t.eir st.uct.re, funct.on, expression and relat.onshipw.t. male infert.lit.

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Asian Journal of Andrology 2003年第4期5卷 315-324页

作者： Vincent.w. Aoki Douglas t. Carrell Andrology and IVF Laborat.ries Universit. of Ut.h School of Medicine Salt Lake City UT 84108 USAAndrology and IVF Laboratories University of Utah School of Medicine Salt Lake City UT 84108 USA

During spermiogenesis, t.e prot.mine prot.ins play an int.gral role in spermat.d chromat.n compact.on. Recent.research has focused on many facet. of prot.mine biology, including prot.mine gene and prot.in st.uct.re/ f... 详细信息

t.act.During spermiogenesis, t.e prot.mine prot.ins play an int.gral role in spermat.d chromat.n compact.on. Recent.research has focused on many facet. of prot.mine biology, including prot.mine gene and prot.in st.uct.re/ funct.on relat.onships, mechanisms of prot.mine expression regulat.on and involvement.of t.e prot.mines in male fert.lit.. In t.is paper, w. review.our current.underst.nding of t.e st.uct.re and funct.on of t.e prot.mine-1 (P1) and prot.mine-2 (P2) prot.ins and genes, t.e expression and regulat.on of t.ese genes and t.e relat.onship bet.een t.e prot.mines and male fert.lit.. In addit.on, w. offer a brief out.ook on fut.re invest.gat.on int. prot.mine prot.ins.

关键词： prot.mines spermat.ds male infert.lit. spermat.d t.ansit.on prot.ins