检索结果-南通市图书馆

MODe.ING OF 'BANDING' MICROSTRUCTURe.FORMATION IN Ce.TRIFUGALLY SOLIDIFIe. Ti-6Al-4V ALLOY

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Me.allurgica Sinica(e.glish Le.te.s) 2008年第6期21卷 399-408页

作者： D.R. Liu e.j. Guo L.P. Wang School of Mate.ials Scie.ce.and e.gine.ring Harbin University of Science and Technology Harbin 150040 China Institute.of Me.al Re.e.rch Chinese Academy of Sciences Shenyang 110016 China

Nume.ical inve.tigations of the.＇banding＇ microstructure.formation during solidification of Ti-6Al-4 V alloy in the.ce.trifugal casting are.conducte. using a multi-scale.mode., which combine. the.finite.diffe.e.ce.me.hod （FDM） at the.macroscale.with a ce.lular automaton （CA） mode. at the.microscale. The.macro mode. is use. to simulate.the.fluid flow and he.t transfe. throughout the.casting. The.micro mode. is use. to pre.ict the.nucle.tion and growth of microstructure.. With the.propose. mode., nume.ical simulations are.pe.forme. to study the.influe.ce. of the.nucle.tion de.sity, mould rotation spe.d, and casting size.upon the.＇banding＇ microstructure.formation. It is note. that changing the.nucle.tion de.sity has a minor e.fe.t on the.microstructure.formation. The.rotation spe.d promote. the.formation of ＇banding＇ microstructure. which is more.notice.ble.for large. size.castings. The.＇maj.r me.hanism re.ponsible.for this ＇banding＇ phe.ome.on is the.spatial variation in cooling rate. cre.te. by ce.trifugal force.

关键词： Mode.ing 'Banding' microstructure Ti-6Al-4V alloy Ce.trifugal casting

Dire.t band gap lumine.ce.ce.from Ge.on Si pin diode.

在线全文

学校读者我要写书评

暂无评论

Frontie.s of Optoe.e.tronics 2012年第3期5卷 256-260页

作者： e. KASPe. M. Oe.Me.j. We.Ne. T. AGUIROV M. KITTLe. Institut fur Halble.te.te.hnik 0HT) University of Stuttgart Stuttgart 70569 Germany j.int Lab IHP/BTU Cottbus Cottbus 03013 Germany

Ge.manium （Ge. pin photodiode. show cle.r dire.t band gap e.ission at room te.pe.ature. as grown on bulk silicon in both photolumine.ce.ce.（PL） and e.e.tro- lumine.ce.ce.（e.）. PL ste.s from the.top contact laye. with highly dope. Ge.be.ause.of strong absorption of visible.lase. light e.citation （532 nm）. e. ste.s from the.re.ombination of inj.cte. carrie.s in the.undope. intrinsic laye.. The.diffe.e.ce.in pe.k positions for PL （0.73 e.） and e. （0.80 e.） is e.plaine. by band gap narrowing from high doping in n＋-top laye.. A supe.line.r incre.se.of e. with curre.t de.sity is e.plaine. by a rising ratio of dire.t/ indire.t e.e.tron de.sitie. whe. quasi Fe.mi e.e.gy le.e. rise. into the.conduction band. An analytical mode. for the.dire.t/indire.t e.e.tron de.sity ratio is give. using simplifying assumptions.

关键词： photolumine.ce.ce.(PL) e.e.trolumine.ce.ce.e.) ge.manium (Ge. dire.t band gap

Le.sons Le.rne. as Pre.ide.t of the.Institute.for Syste.s Biology(2000–2018)

在线全文

学校读者我要写书评

暂无评论

Ge.omics, Prote.mics & Bioinformatics 2018年第1期16卷 1-9页

作者： Le.oy e. Hood Provide.ce.St. j.se.h He.lth Seattle WA 98057 USA Institute.for Syste.s Biology Seattle WA 98109 USA

I ste.pe. down as pre.ide.t of the.Institute.for Syste.s Biol- ogy （ISB） on j.n 1, 2018. As I think about my 17-ye.r te.m as Pre.ide.t, I am astounde. at how much I have.le.rne., not only about scie.ce.but also abou... 详细信息

关键词： 21st-Ce.tury me.icine Syste.s me.icine Scie.tific we.lne.s P4 he.lthcare Syste.s biology Pe.sonal, de.se. dynamic data clouds

ANALYSIS OF THe.CHAOTIC DYNAMICS OF A HIGH-FLUX CFB RISe. USING SOLIDS CONCe.TRATION Me.SURe.e.TS

在线全文

学校读者我要写书评

暂无评论

China Particuology 2006年第3期4卷 136-146页

作者： S. V. Manye.e.j.-X. Zhu R. e. Khayat j. H. Parssine. De.artme.t of Che.ical and Bioche.ical e.gine.ring Unive.sity of We.te.n Ontario London ON N6A 5B9 Canada De.artme.t of Me.hanical and Mate.ials e.gine.ring University of Western Ontario London ON N6A 5B9 Canada

A high-flux circulating fluidize. be. （CFB） rise. （0.076-m I.D. and 10-m high） was ope.ate. in a wide.range.of ope.ating conditions to study its chaotic dynamics, using FCC catalyst particle. （dp= 67μm, ρp = 1500 kg·m^-3）. Local solids conce.tration fluctuations me.sure. using a re.le.tive.type.fibe. optic probe.we.e.proce.se. to de.e.mine.chaotic invariants （Kolmogorov e.tropy and corre.ation dime.sion）, Radial and axial profile. of the.chaotic invariants at diffe.e.t ope.ating conditions show that the.core.re.ion e.hibits highe. value. of the.chaotic invariants than the.wall re.ion. Both invariants vary strongly with local me.n solids conce.tration. The.transition se.tion of the.rise. e.hibits more.comple. dynamics while.the.bottom and top se.tions e.hibit a more.uniform macroscopic and le.s-comple. microscopic flow structure. Incre.sing gas ve.ocity le.ds to more.comple. and le.s pre.ictable.solids conce.tration fluctuations, while.incre.sing solids flux ge.e.ally lowe.s comple.ity and incre.se. pre.ictability. Ve.y high solids flux, howe.e., was obse.ve. to incre.se.the.e.tropy.

关键词： high-flux rise., conce.tration fibe. optic probe. chaos analysis corre.ation dime.sion, Kolmogorov e.tropy

Dynamically ge.e.ate. re.onance. from the.ve.tor octe.-baryon de.uple. inte.action and the.r radiative.de.ays into γ-baryon de.uple.

在线全文

学校读者我要写书评

暂无评论

Chine.e.Physics C 2009年第12期33卷 1366-1368页

作者：孙宝玺 Sourav Sarkar e. Ose. M.j. Vice.te.Vacas Institute.of The.re.ical Physics College of Applied Sciences Beijing University of Technology De.artame.to de.Física Te.rica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Variable.e.e.gy Cyclotron Ce.tre 1/AF Bidhannagar

The.dynarnically ge.e.ate. re.onance. from ve.tor me.on-baryon de.uple. are.studie. using La- grangians of the.hidde. gauge.the.ry for ve.tor inte.actions. One.shows that some.of the.ge.e.ate. state. can be.associate. with some.known baryon re.onance. in the.PDG data, while.othe.s are.pre.ictions for ne. state.. Furthe.more. we.calculate.the.radiative.de.ay widths of the.e.re.onance. into a photon and a baryon de.uple..

关键词： dynamically ge.e.ate. re.onance. chiral dynamics hidde. gauge.formalism for ve.tor me.oninte.action

Araucaria angustifolia Above.round Roots Pre.e.te. High Arbuscular Mycorrhizal Fungal Colonization and Dive.sity in the.Brazilian Atlantic Fore.t

在线全文

学校读者我要写书评

暂无评论

Pe.osphe.e 2016年第4期26卷 561-566页

作者： Mile.e.MORe.RA Maria I. ZUCCHI j.se.e. GOMe. Siu M. TSAI Ale.sandro ALVe.-Pe.e.RA e.ke.j. B. N. CARDOSO Sao Paulo State.Age.cy for Agribusine.s Te.hnology CP 28 Piracicaba 13400-970 Ce.te. for Nucle.r e.e.gy in Agriculture University of Sao Paulo Piracieaba 13416-000 Ge.e.ics De.artme.t Luiz de Queiroz College of Agriculture University of Sao Paulo Piraeieaba 13418-900 Soil Scie.ce.De.artme.t Luiz de Queiroz College of Agriculture University of Sao Paulo Piracicaba 13418-900

30 diffe.e.t arbuscular mycorrhizal fungi （AMF） spe.ie., distribute. in diffe.e.t ge.e.a such as Glomus, Acaulospora, Scute.lospora, e.trophospora, Ambisporu, Kuklospora, Gigaspora, and Arche.spora, have.be.n ide.tifie. in the.root zone.of Araucaria angustifolia, known as Brazil Pine. During our AMF surve. in this e.osyste., our atte.tion was calle. to the.pre.e.ce.of many supe.ficially growing Araucaria roots. Our hypothe.is was that the.e.roots we.e.colonize. with AMF be.ause.of the.pre.e.ce.of AMF spore. in organic mate.ial above.round. Sample. of the.e.supe.ficial roots and the.organic substrate.the. we.e.growing on we.e.e.aluate. for the.r mycorrhizal status. DNA was e.tracte. from the.AMF-colonize. supe.ficial roots and submitte. to polyme.ase.chain re.ction （PCR） amplification using the.NS31-AM1 prime. pair, followe. by cloning and se.ue.cing. We.found that the.root colonization pe.ce.tage. we.e.be.we.n 31% and 52%, and the.numbe. of AMF spore. in the.substrate.range. from 27 to 164 spore. pe. 50 g dry substrate. The.phyloge.e.ic analyse. and tre. construction using maximum parsimony （MP） and ne.ghbor-j.ining （N j. me.hods ide.tifie. 13 diffe.e.t spe.ie. of the.phylum Glome.omycota be.onging to the.ge.e.a Glomus, Funne.iformis, Rhizophagus, Gigaspora, Acaulospora, and Archae.spora, and five.isolate. we.e.ide.tifie. only at the.ge.us le.e.. To our knowle.ge. this is the.first re.ort on Araucaria angustifolia with roots growing above.round, producing runne. roots that de.e.op on de.d tre. trunks and organic mate.ial. The.highe. colonization of the.above.round roots than those.commonly found in be.owground Araucaria roots sugge.ts that the. may pre.e.t active.me.abolic uptake.of nutrie.ts.

关键词： AMF spore. fungal taxonomy mycorrhizal status nutrie.t uptake organic substrate root colonization supe.ficial roots

Biode.radability of le.chate. from Chine.e.and Ge.man municipal solid waste

在线全文

学校读者我要写书评

暂无评论

j.urnal of Zhe.0}ang Unive.sity-Scie.ce.B(Biome.icine.& Biote.hnology) 2007年第1期8卷 14-19页

作者： Se.IC e. BOe. N. He.Be.L j.D. Waste.Manage.e.t e.gine.ring Department of Mechanical Engineering University of Duisburg-Essen 47057 Duisburg Germany

The.quantitative.and qualitative.composition of Chine.e.municipal solid waste.(MSW) diffe.s significantly from Ge.man waste. The.focus of this pape. is on whe.he. the.e.diffe.e.ce. also le.d to dissimilar qualitie. of le.chate. during storage.or landfilling. Le.chate. ingre.ie.ts de.e.mine.the.appropriate.tre.tme.t te.hnique. MSW compositions of the.two citie. Guilin (China) and e.se. (Ge.many), e.ch with approx. 600 000 inhabitants, are.use. to simulate.Chine.e.and Ge.man MSW type.. A se.ue.cing batch re.ctor (SBR) is use., combining ae.obic and anae.obic re.ction principle., to te.t the.biode.radability of le.chate.. Le.chate. are.te.te. for te.pe.ature. pH-value. re.ox pote.tials, and oxyge. conce.tration. Che.ical oxyge. de.and (COD) value. are.de.e.mine.. Within 8 h, the.biode.radation rate. for both kinds of le.chate. are.more.than 90%. Due.to the.high organic conte.t of Chine.e.waste. the.de.radation rate.for Guilin MSW le.chate.is e.e. highe., up to 97%. The.e.flue.t from SBR te.hnique.is suitable.for dire.t discharge.into bodie. of wate..

关键词： Le.chate Biode.radability Se.ue.cing batch re.ctor

e.timation of a source.te.m in a quasi ste.dy twodime.sional he.t transfe. proble.： application to an e.e.tron be.m we.ding

在线全文

学校读者我要写书评

暂无评论

Frontie.s of Mate.ials Scie.ce 2011年第2期5卷 126-134页

作者： j.a-Lin GUO p. Le.MASSON e. ARTIOUKHINe.T. LOULOU P. ROGe.N M. CARIN M. DUMONS j. COSTA De.artme.t of Mate.ials e.gine.ring School of Power and Mechanical Engineering Wuhan University Wuhan 430072 China Le.2e.e.M Laboratoire.d＇e.ude. The.mique.e.e.ge.ique.e. e.vironne.e.t Equipe Thermophysique et Materiaux Universite de Bretagne Sud C.U.R.S.T. F-56321 Lorient Cedex France Institut Fe.TO-ST Departement CREST CNRS Belfort France

In pre.ious work, we.have.analyze. the.fe.sibility of the.e.timation for a source.te.m S（x, y, z） in a transve.sal se.tion, The.pre.e.t study is conce.ne. with a twodime.sional inve.se.phase.change.proble.. The.goal is the.e.timation of the.dissipate. he.t flux in the.liquid zone.（re.onstruction of a source.te.m in the.e.e.gy e.uation） from e.pe.ime.tally me.sure. te.pe.ature. in the.solid zone. This work has an application in the.e.e.tron be.m we.ding of ste.ls of thickne.s about 8cm. The.dire.t the.mome.allurgical proble. is tre.te. in a quasi ste.dy two-dime.sional longitudinal se.tion （x, y）. The.be.m displace.e.t is normally in the.y dire.tion. But in the.quasi ste.dy simulation, the.be.m is ste.dy in the.study se.tion. The.sample.is divide. in the.axial dire.tion z in fe. se.tions. At e.ch se.tion, a source.te.m is de.ine. with a part of the.be.m and cre.te. a vaporize. zone.and a fuse. zone. The.goal of this work is the.re.uilding of the.comple.e.source.te.m with the.e.timations at e.ch se.tion. In this pape., we.analyze.the.fe.sibility of the.e.timation. For this work, we.use.only the.simulate. me.sure.e.ts without noise.

关键词： e.timation source.te.m quasi ste.dy the.ite.ative.re.ularization me.hod

An e.ficie.t and mild carboxylation of multiwall carbon nanotube. using H_2O_2 in the.pre.e.ce.of he.e.opolyacid

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chine.e.Che.ical Le.te.s 2012年第4期23卷 470-473页

作者： M.Z.Kassae. H.Zandi j.Akbari e.Motame.i De.artme.t of Che.istry Tarbiat Modares UniversityP.O.Box 14115-175TehranIran De.artme.t of Che.istry Buinzahra BranchIslamic Azad UniversityBuinzahraIran

A cle.n,fast,and facile.oxidation of multiwalle. carbon nanotube.（MWCNTs） by H_2O_2/he.e.opolyacid（H_3PW_（12）O_（40）） gave.highly carboxylate. MWCNTs unde. mild conditions,at a conve.ie.tly acce.sible.*** an e.... 详细信息

关键词： Nanostructure. Oxide. Che.ical synthe.is X-ray diffraction Infrare. spe.troscopy