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绵羊群体与斯诺登尼亚环境关系的研究

草原与草坪 1981年第2期 13-18页

作者： j·Dale.R.e.Hughe. 姚彦臣

斯诺登尼亚(Snowdonia)山区草地早已用于绵羊的放牧。通过在诸试验范围内调查表明了绵羊分布的格式及其与环境因素,特别是土壤母质和植被类型的关系。一、导言绵羊在斯诺登尼亚是占优势的放牧家畜,它们对山地生态系统日益增强的影响始

关键词：绵羊地段群体密度种群密度绵羊群羔羊绵羊单位斯诺登尼亚

Microfibrillate. Ce.lulose.from Sugarcane.Bagasse.as a Biore.ine.y Product for e.hanol Production

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journal of Re.e.able.Mate.ials 2018年第2期6卷 195-202页

作者： Rafae. Grande.e.iane.Trovatti Maria Te.e.a B.Pime.ta Antonio j.F.Carvalho Unive.sity of São Paulo Av.João Dagnone 1100CEP 13563-120São CarlosSão PauloBrazil Unive.sity of Araraquara(UNIARA) R.Carlos Gomes1217CEP 14801-320AraraquaraSão PauloBrazil Suzano Pape. e.Ce.ulose.SA Av.Lirio Correa146506460-040LimeiraSão PauloBrazil

Re.e.rch involving the.pre.aration of microfibrillate. ce.lulose.MFC)from sugarcane.bagasse.is a re.e.ant topic to the.production of ne. nanomate.ials and more.acce.sible.ce.lulose.substrate. for the.production of se.ond ge.e.ation *** the.transformation of ce.lulose.into glucose.the.pre.ursor of se.ond ge.e.ation e.hanol,this nanosize. ce.lulosic substrate.re.re.e.ts a more.appropriate.mate.ial for the.che.ical hydrolysis *** high aspe.t ratio of MFC improve. hydrolysis,re.uiring mild conditions and de.re.sing the.ge.e.ation of ***,MFC was pre.are. from sugarcane.bagasse.by ultrasound *** mate.ial was oxidize. with 2,2,6,6-te.rame.hylpipe.idine.N-oxyl(Te.PO)to produce.ne.ative.y charge. high de.ibrillate. *** MFC was characte.ize. by Fourie. transform infrare. spe.troscopy(FTIR),X-ray diffraction(XRD),scanning e.e.tron microscopy(Se.)and viscosity me.sure.e.ts.

关键词： Ce.lulose.nanofibrils substrate se.ond ge.e.ation e.hanol

Inve.tigation of e.vironme.tal and land use.impacts in fore.te. pe.mafrost he.dwate.s of the.Se.e.ga-Baikal rive. syste.,Mongolia-e.fe.ts on discharge.wate. quality and macroinve.te.rate.dive.sity

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Inte.national Soil and Wate. Conse.vation Re.e.rch 2021年第4期9卷 605-619页

作者： Martin Pfe.ffe. Ge.rg Küstne. e.de.e.se.se. e.de.e.ukh Wolf von Tümpling jürge. Hofmann De.artme.t of Bioge.graphy University of BayreuthUniversitätsstraße 3095447 BayreuthGermany De.artme.t of Aquatic e.osyste. Analysis and Manage.e.t(ASAM) Helmholtz Centre for Environmental Research-UFZBrückstraße 3a39114 MagdeburgGermany De.artme.t of e.ology National University of MongoliaBaga toiruu 47Ulaanbaatar 210646Mongolia De.artme.t of Animal e.ology and Tropical Biology BiocenterJulius-Maximilians-Universität WürzburgAm Hubland97074 WürzburgGermany National Dong Hwa Unive.sity No.1Sec.2Da Hsueh Rd.ShoufengHualien 97401Taiwan Ce.tral Laboratory for Wate. Analytics&Che.ome.rics Helmholtz Centre for Environmental Research-UFZBrückstrasse 3a39114 MagdeburgGermany Büro für Inte.rie.te. Ge.ässe.schutz-BiG Werner-Voß-Damm 54 b12101 BerlinGermany

He.dwate. stre.ms play a major role.for provision of e.osyste. se.vice.,*** *** inve.tigate. a high-altitude.he.dwate. catchme.t of the.Kharaa Rive.(including 411st-orde. rive.s)to unde.stand the.impact of land cove.(e.pe.ially fore.t cove.),e.vironme.t and human usage.on runoff,che.ical wate. quality and macroinve.te.rate.fauna in a rive. basin unde. discontinuous pe.mafrost conditions in an arid,sparse.y populate. re.ion of *** ve.ify our hypothe.e. that diffe.e.t landuse. and e.vironme.tal impacts in pe.mafrost he.dwate.s influe.ce.wate. quality,we.inve.tigate. 105 sampling site.,37 of the. at inte.mitte.t stre.m se.tions without wate. *** was positive.y impacte. by land cove. type. ste.pe.grassland and fore.t and ne.ative.y by shrubland,fore.t burnt by wild fire.(indicating a re.uction of pe.mafrost)and *** quality was affe.te. by altitude.longitude.and latitude.shrub growth and wate. *** dive.sity of macroinve.te.rate. was drive. by wate. te.pe.ature.iron conte.t of the.wate.,flow ve.ocity,and subbasin size.adjuste. R^(2)=0.54).Sample.plots cluste.e. in thre. groups that diffe.e. in wate. che.istry,macroinve.te.rate.dive.sity,spe.ie. composition and *** study confirms that ste.pe. and grasslands have.a highe. contribution to runoff than fore.ts,fore.t cove. has a positive.impact on wate. quality,and dive.sity of macroinve.te.rate. is highe. in site. with le.s nutrie.ts and *** e.ce.le.t e.ological status of the.uppe. re.che. of the.Kharaa is se.e.e.y thre.te.e. by fore.t fire. and human-induce. climate.change.and urge.tly ne.ds to be.conse.ve..

关键词： e.osyste. se.vice. e.he.e.opte.a-Ple.opte.a-Trichopte.a (e.T)comple. GIS-base. analysis IWRM-MoMo proje.t Land use.land cove.(LULC) Natural re.e.e.ce.state Runoff Se.f-purification capacity Stre.m wate. che.istry

Flow of Ste.l in Mold Re.ion During Continuous Casting

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journal of Iron and Ste.l Re.e.rch(Inte.national) 2007年第2期14卷 30-35,41页

作者： ZHANG Xing-guo ZHANG We.-xiao jIN jun-ze.j. W. e.ans Re.e.rch Ce.te. of Foundry e.gine.ring Dalian University of Technology Dalian 116023 Liaoning China De.artme.t of Mate.ial Scie.ce.and e.gine.ring University of California at Berkeley Berkeley CA94720 USA

The.particle.image.ve.ocime.ry （PIV） te.hnique.was use. to study the.fluid flow phe.ome.a that occurre. during continuous casting, using a wate. mode. with dime.sions of 1 840mm× 280 mm. Two type. of solidifie. she.ls, i. e. , the.smooth type.and the.coarse.type. we.e.use. to characte.ize.the.de.drite.in orde. to simulate.diffe.e.t liquid-solid inte.facial conditions. The.influe.ce.of the.nozzle.angle.and the.imme.sion de.th of nozzle. as we.l as the.casting spe.d on the.flow be.avior was inve.tigate. quantitative.y. The.re.ults we.e.as follows：（1） The.e.are.two large.re.irculations above.and be.ow the.fluid je. in the.mold, re.pe.tive.y, unde. the.smooth inte.face.condition. Howe.e., in the.case.of the.de.drite.solidifie. she.l, it was found that the.flow ve.ocity of the.fluid de.re.se. and more.smalle. vortice. appe.re. in the.uppe. re.ion of the.mold. （2） The.angle.and the.imme.sion de.th of nozzle.are.two important factors affe.ting the.flow patte.n, and the. are.also capable.of bringing about the.change.in the.flow dire.tion. （3） The.highe. the.casting spe.d, the.highe. are.the.je. stre.m and the.impacting point on the.narrow face. Howe.e., the.high casting spe.d cause. se.ious fluctuation of the.me.iscus, and corre.pondingly le.ds to various de.e.ts.

关键词： particle.image.ve.ocime.ry continuous casting ste.l fluid flow

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现代船用柴油机润滑油及其发展(一)

柴油机 1984年第4期 11-19页

作者： F.j.Thomas G.e.Hold 钱伯章

船用柴油机船用柴油机的分类见表1。低速、直接传动、二冲程、十字头式柴油机,它们的工作转速在90～150转/分。现在设计的转速更低,这是为了通过提高螺旋桨效率来改善燃料的经济性。这些发动机的输出功率为每缸700～4,000马力,单机功率... 详细信息

船用柴油机船用柴油机的分类见表1。低速、直接传动、二冲程、十字头式柴油机,它们的工作转速在90～150转/分。现在设计的转速更低,这是为了通过提高螺旋桨效率来改善燃料的经济性。这些发动机的输出功率为每缸700～4,000马力,单机功率可达48,000马力。业已表明,两级涡轮增压的柴油机,每缸输出功率可达6,700马力。

关键词：润滑油含硫量活塞环磨损总碱值船用气缸油

Involve.e.t of swe.t pe.pe. Ca LOX2 in jasmonate.de.e.de.t induce. de.e.ce.against We.te.n flowe. thrips

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