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Use of elect.on microscopy on microst.uct.re ch.ract.rizat.on of h.gh.ch.omium cast.irons

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Ch.na Foundry 2007年第1期4卷 38-43页

作者： J.t.h. Pearce t. Ch.iruangsri A. Wiengmoon N. Poolt.ong h. Nomura Mt.C-Nat.onal Met.ls and Mat.rials t.ch.ology Cent.e Depart.ent.of Indust.ial Ch.mist.y Chiang Mai University Depart.ent.of Ph.sics Naresuan University Division of Mat.rials t.ch.ology King Mongkut's University of Technology Thonburi Depart.ent.of Mat.rials Nagoya University

t.e ph.sical met.llurgy underlying t.e development.of cast.microst.uct.res in abrasion resist.nt.h.gh.ch.omium cast.irons, and t.eir st.uct.ral modificat.on by t.ermal t.eat.ent. is relat.vely complex. St.uct.ral ch.ract.risat.on via elect.on microscopy t.erefore h.s a key role t. play in furt.ering our underst.nding of t.e ph.se t.ansformat.ons t.at.cont.ol t.e microst.uct.res and h.nce t.e service performances of t.ese irons as wear part.. t.is paper sh.ws h.w bot. scanning and especially t.ansmission elect.on microscopy can provide valuable informat.on on t.e nat.re of eut.ct.c and secondary carbides and on t.e mat.ix st.uct.res in t.ese irons. Part.cular at.ent.on is given t. current.ch.ract.risat.on research.on convent.onally cast.30%Cr irons t.at.are used for applicat.ons involving corrosive wear e.g. slurry pumps and on a semi-solid cast.27%Cr iron t.at.h.s a pot.nt.al for applicat.ons in indust.y.

关键词： h.gh.ch.omium cast.iron elect.on microscopy microst.uct.re ch.ract.rizat.on

Web search.and dat. mining of nat.ral product. and t.eir bioact.vit.es in PubCh.m

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Science Ch.na Ch.mist.y 2013年第10期56卷 1424-1435页

作者： h.O Ming cheng t.ejun WANG Yanli BRYANt.h. St.ph.n Nat.onal Cent.r for Biot.ch.ology Informat.on National Library of Medicine National Institutes of HealthBethesda MD 20894 USA

Nat.ral product.,as major resources for drug discovery h.st.rically,are gaining more at.ent.ons recent.y due t. t.e advancement.in genomic sequencing and ot.er t.ch.ologies,wh.ch.makes t.em at.ract.ve and amenable t. drug candidat. *** and mining t.e bioact.vit. informat.on of nat.ral product. are ext.emely import.nt.for accelerat.ng drug development.process by reducing ***,a number of publicly accessible dat.bases h.ve been est.blish.d t. facilit.t. t.e access t. t.e ch.mical biology dat. for small molecules including nat.ral ***,it.is imperat.ve for scient.st. in relat.d fields t. exploit.t.ese resources in order t. expedit. t.eir research.s on nat.ral product. as drug leads/candidat.s for disease ***,as a public dat.base,cont.ins large amount. of nat.ral product. associat.d wit. bioact.vit. *** t.is review,we int.oduce t.e informat.on syst.m provided at.PubCh.m,and syst.mat.cally describe t.e applicat.ons for a set.of PubCh.m web services for rapid dat. ret.ieval,analysis,and downloading of nat.ral *** h.pe t.is work can serve as a st.rt.ng point.for t.e research.rs t. perform dat. mining on nat.ral product. using PubCh.m.

关键词： nat.ral product. drug discovery PubCh.m public dat.base dat. mining

RESEARCh.ON INFLUENCE OF t.MPERAt.RE ON A PRECISION FORGING PROCESS OF BLADE WIt. 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. Zh.n 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 wit. h.gh.t.mperat.re and large plast.c deformat.on. Int.ract.on of deformat.on and h.at.conduct.on leads t. large uneven dist.ibut.on of t.mperat.re. t.e unevenness of t.mperat.re dist.ibut.on h.s a great.effect.on mech.nical 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 wit. a t.non int. considerat.on, a 3D mech.nical model in precision forging is built.up. t.e dist.ibut.on laws 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-mech.nical 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 ach.evement. of predict.ng microst.uct.re and mech.nical propert.es for forged blades is significant.

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

Ph.t.product.on of t.e Θ^+ and it. vect.r andaxial-vect.r st.uct.re

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Ch.nese Ph.sics C 2009年第12期33卷 1279-1284页

作者： h.-Ch. Kim K. Goeke t. Ledwig S. i. Nam Depart.ent.of Ph.sics Inha University Incheon 402-751 Republic of Korea Inst.t.t.fr t.eoret.sch. Ph.sik II Ruhr-Universitt Bochum D-44780 Bochum Germany Inst.t.t.fr Kernph.sik Universitt Mainz D-55099 Mainz Germany Depart.ent.of Ph.sics Chung-Yuan Christian University (CYCU)

We present.recent.invest.gat.ons on t.e vect.r and axial-vect.r t.ansit.ons of t.e baryon ant.decuplet.wit.in t.e framework of t.e self-consist.nt.SU（3） ch.ral quark-solit.n model, t.king int. account.t.e 1/No rot.t.onal and linear mscorrect.ons. t.e main cont.ibut.on t. t.e elect.ic-like t.ansit.on form fact.r comes from t.e wave-funct.on correct.ons. t.is is a consequence of t.e generalized Ademollo-Gat.o t.eorem. It.is also found t.at.in general t.e leading-order cont.ibut.ons are almost.canceled by t.e rot.t.onal 1/No correct.ons. t.e result. are summarized as follows： t.e vect.r and t.nsor K＇NO coupling const.nt., gK＊N= 0.74--0.87 and fk＊N =0.53--1.16, respect.vely, and F→KN = 0.71 MeV, based on t.e result.of t.e KN coupling const.nt.gKne =0.83. We also sh.w t.e different.al cross sect.ons and beam asymmet.ies, based on t.e present.result.. We also discuss t.e connect.on of present.result. wit. t.e original work by Diakonov, Pet.ov, and Polyakov.

关键词： Baryon ant.decuplet vect.r and axial-vect.r t.ansit.on form fact.rs ch.ral quark-solit.n model,Ph.t.product.on of t.e +

Convect.ve h.at.t.ansfer analysis for Mh. perist.lt.c flow in an asymmet.ic ch.nnel

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Int.rnat.onal Journal of Biomat.emat.cs 2014年第3期7卷 1-15页

作者： M. Awais S. Farooq h. Yasmin t. h.yat. A. Alsaedi Depart.ent.of Mat.emat.csCOMSAt. Inst.t.t. of Informat.on t.ch.ology At.ock Pakistan Depart.ent.of Mat.emat.csQuaid-I-Azam Universit. 45320 Islamabad 44000 Pakistan Depart.ent.of Mat.emat.csFacult. of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

Magnet.h.drodynamic perist.lt.c flow of Jeffery fluid in an asymmet.ic ch.nnel is addressed. t.e ch.nnel walls sat.sfy t.e convect.ve condit.ons. Asymmet.y h.re is con- sidered due t. wave t.ains of different.amplit.des and ph.ses. Solut.ons for t.e velocit., t.mperat.re and pressure gradient.are obt.ined using long wavelengt. approximat.on. Plot. reflect.ng t.e impact.of various paramet.rs of int.rest.are sh.wn and examined.

关键词： Jeffery fluid convect.ve boundary condit.ons pumping and t.apping.

t.E ELECt.OCh.MICAL BEh.VIOR OF OCEANIC MICROBIOLOGICAL INFLUENCED CORROSION ON CARBON St.EL

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Act. Met.llurgica Sinica(English.Let.ers) 2007年第5期20卷 334-340页

作者： X.t. Ch.ng Y.S. Yin G.h. Niu t. Liu S. cheng S.B. Sun Inst.t.t. of Mat.rials Science and t.ch.ology Ocean University of China Qingdao 266003 China College of Mat.rials Science and t.ch.ology Shandong University Jinan 250061 China

t.e corrosion beh.vior of carbon st.el in t.e medium of marine microorganisms was invest.gat.d by elect.och.mical impedance spect.a, polarizat.on curves, and so on. Experiment.l result. sh.wed t.at.t.e corrosion pot.nt.al of carbon st.el moved in a negat.ve direct.on in t.e unpurified marine microorganism solut.on, and t.e polarizat.on st.le of t.e cat.odic process did not.ch.nge. t.e elect.och.mical impedance spect.a sh.wed t.at.t.e impedance value of t.e elect.ode decreased in t.e medium wit. bact.ria, wh.ch.indicat.d t.at.t.e exist.nce of microorganism could accelerat. t.e corrosion progress of carbon st.el.

关键词： carbon st.el microbiological influenced corrosion polarizat.on curve elect.och.mical impedance spect.oscopy

Resource assessment.of copper deposit. in Ch.na

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Journal of Cent.al Sout. Universit. of t.ch.ology 2005年第z1期12卷 108-113页

作者： Zh.NG Qin-li GU De-sh.ng t. Sh.ji h. Kaneda Sch.ol of Resources and Safet. Engineering Central South University Changsha 410083 China School of Resources and Safety Engineering Central South University Changsha 410083 China Department of Environment System School of Frontier Sciences the University of Tokyo Tokyo 113-8656 Japan Department of Life Area Environmental Science Faculty of Science the Toho University Tiba 274-8510 Japan

Copper-bearing deposit. of Ch.na are st.t.st.cally analyzed in t.rms of ore grade, met.l amount.and ore t.nnage. Each.of grade and met.l amount.sh.ws more or less a lognormal dist.ibut.on. Analysis gives 10 copper met.llogenic dist.ict., each.h.ving specific densit.es of deposit.numbers and copper reserves larger t.an 3. Based on t.e rat.o of copper in ore value (Rcu), Ch.nese copper deposit. are classified int. t.o groups: mainly copper-producing deposit. (MC: Rcu≥0.5) and accessorily copper-producing deposit. (AC: Rcu＜0. 5). t.e grade-t.nnage relat.on of MC deposit. can be combined by t.o exponent.al funct.ons approximat.ng h.gh.grade (＞ 3.0 %) and low grade (＜2.0%) part.. t.e crit.cal copper grade, wh.ch.is obt.ined from t.e low grade part.of t.e relat.on, is 0. 34 %. Ch.nese copper resources are concluded t. become pessimist.c, because some mines are working wit. grades close t. t.is crit.cal value. t.king account.of t.e fact.t.at.many copper deposit. are act.ally polymet.llic, Cu-equivalent.grades, wh.ch.are convert.d from rat.os of met.l prices t. t.e copper price, are also int.oduced. t.e crit.cal Cu-equivalent.grade of MC deposit. (0. 43 % ) also suggest. t.at.Ch.nese copper resources are pessimist.c.

关键词： copper resources crit.cal grade assessment

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Communicat.ons in t.eoret.cal Ph.sics 2010年第3期53卷 575-578页

作者： K. Fakh.r t. h.yat.cheng Yi N. Amin Depart.ent.of Mat.emat.cs Faculty of Science Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia Depart.ent.of Mat.emat.cs Universily of Science and t.ch.ology of Ch.na h.fei Anhui 230026 China

t.is not. looks at.t.e t.o similarit. solut.ons of t.e Navier-St.kes equat.ons in polar coordinat.s. In t.e second solut.on an init.al value problem is reduced int. generalized st.t.onary KDV and h.nce int.grable.

关键词： Navier St.kes equat.on symmet.y solut.ons st.t.onary I4DV

A DIOPh.Nt.NE INEQAULIt. (Ⅱ)

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Ch.nese Annals of Mat.emat.cs,Series B 1991年第3期12卷 306-308页

作者：单墫 EDWARD t. h. WANG Depart.ent.of Mat.emat.cs Nanjing Normrl University Nanjing JiangSu China. Wilfrid Laurier Universit. Ontario Canada.

t.is paper proves t.e exist.nce of infinit.ly many int.ger solut.ons t. a Dioph.nt.ne inequalit..

关键词： int.ger inequalit. infinit.ly Davenport 曲口门刀日至