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Alkali-t.ermal gasificat.on and hydrogen generat.on pot.nt.al of biomass

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Front.ers of Chemical Science and Engineering 2017年第3期11卷 369-378页

作者： Alexander B. Koven Shit.ng S. t.ng Ramin R. Farnood Charles q. Jia Depart.ent.of Chemical Engineering and Applied Chemist.y University of Toronto Ontario M5S-3E5 Canada School of Chemist.y and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 China

Generat.ng hydrogen gas from biomass is one approach t. lowering dependencies on fossil fuels for energy and chemical feedst.ck, as well as reducing greenhouse gas emissions. Using bot. eq.ilibrium simulat.ons and bat.h experiment. wit. NaOH as a model alkaline, t.is st.dy est.blished t.e t.chnical feasibilit. of convert.ng various biomasses （e.g., glucose, cellulose, xylan and lignin） int. H2-rich gas via cat.lyst.free, alkali-t.ermal gasificat.on at.moderat. t.mperat.res （as low as 300℃）. t.is process could produce more H2 wit. less carbon-cont.ining gases in t.e product.t.an ot.er comparable met.ods. It.was shown t.at.alkali-t.ermal gasificat.on follows CxHyO2 ＋ 2xNaOH ＋（x-z）H20 = （2x＋y/2-z）H2 ＋xNa2CO3, wit. carbonat. being t.e solid product.which is different.from t.e one suggest.d in t.e lit.rat.re. Moreover, t.e concept.of hydrogen genera- t.on pot.nt.al （H2-GP）-t.e maximum amount.of H2 t.at.a biomass can yield, was int.oduced. For a given biomass CxHyO2, t.e H2-GP would be （2x ＋ y/2-z） moles of H2. It.was demonst.at.d experiment.lly t.at.t.e H2-GP was achievable by adjust.ng t.e amount. of H20 and NaOH, t.mperat.re and pressure. Keywords hydrogen generat.on pot.nt.al, biomass, lignocellulose, alkali-t.ermal gasificat.on, sodium hydroxide

关键词： hydrogen generat.on pot.nt.al biomass lignocellulose alkali-t.ermal gasificat.on sodium hydroxide

An Approach t. q.ant.fy Endomembrane Dynamics in Pollen Ut.lizing Bioact.ve Chemicals

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Molecular Plant 2013年第4期6卷 1202-1213页

作者： Nolan Ung Michelle q. Brown Glenn R. Hicks Nat.sha V. Raikhel Cent.r for Plant.Cell Biology and Depart.ent.of Bot.ny and Plant.Sciences University of California Riverside Riverside CA 92521 USA

t.p growt. of pollen t.bes and root.hairs occurs via rapid polar growt.. t.ese rapidly elongat.ng cells req.ire t.p-focused endomembrane t.afficking for t.e deposit.on and recycling of prot.ins, membranes, and cell wall mat.rials. Most.of t.e image-based dat. published t. dat. are subject.ve and non-q.ant.fied. q.ant.t.t.ve and com- parat.ve descript.rs of t.ese highly dynamic processes have been a major challenge, but.are highly desirable for genet.c and chemical genomics approaches t. dissect.t.is biological net.ork. t. address t.is problem, we screened for small molecules t.at.pert.rbed t.e localizat.on of a marker for t.e Golgi Ras-like monomeric G-prot.in RAB2：GFP expressed in t.ansgenic t.bacco pollen. Semi-aut.mat.d high-t.roughput.imaging and image analysis result.d in t.e ident.fica- t.on of novel compounds t.at.alt.red pollen t.be development.and endomembrane t.afficking. Six compounds t.at.caused mislocalizat.on and varying degrees of alt.red movement.of RAB2：GFP-labeled endomembrane bodies were used t. generat. a t.aining set.of image dat. from which t. q.ant.fy vesicle dynamics. t.e area, velocit., st.aight.ess, and int.nsit. of each body were q.ant.fied using semi-aut.mat.d image analysis t.ols revealing q.ant.t.t.ve differences in t.e phenot.pe caused by each compound. A score was t.en given t. each compound enabling q.ant.t.t.ve comparisons bet.een compounds. Our result. demonst.at. t.at.image analysis can be used t. q.ant.t.t.vely evaluat. dynamic sub- cellular endomembrane phenot.pes induced by bioact.ve chemicals, mut.t.ons, or ot.er pert.rbing agent. as part.of a st.at.gy t. q.ant.t.t.vely dissect.t.e endomembrane net.ork.

关键词： endomembranes vesicle t.afficking q.ant.ficat.on pollen chemical biology.

Coupling Losses and Discriminat.on of Annular Waveguide Laser Resonat.rs

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Chinese Journal of Lasers 1999年第2期8卷 14-20页

作者： WANG Youq.ng HUANG Xint.ng CHEN q. M. q.U J. L. XU q. Y. (Nat.onal Lab. of Laser t.chnology, Huazhong Universit. of Science and t.chnology, Wuhan 430074, China) 华中理工大学激光技术国家重点实验室湖北武汉 430074 华中理工大学激光技术国家重点实验室湖北武汉

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关键词： coupling loss annular waveguide laser t.ric mirror

DEFORMAt.ON BEHAVIOR OF AA6063 ALUMINIUM ALLOY AFt.R REMOVING FRICt.ON EFFECt.UNDER HOt.WORKING CONDIt.ONS

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Act. Met.llurgica Sinica(English Let.ers) 2008年第6期21卷 451-458页

作者： Z. Y. Chen S. q. Xu X.H. Dong Nat.onal Die ＆ Mold CAD Engineering Research Cent.r Shanghai Jiaotong University Shanghai 200030 China College of Mat.rials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China

t.e hot.deformat.on behavior of AA6063 aluminium alloy has been invest.gat.d by means of compression t.st. at.t.mperat.res bet.een 400 and 520℃, and st.ain rat.s ranging from 2.5 t. 10 s^-1. Owing t. t.e barreling, t.e t.eoret.cal model on t.e basis of Hills general met.od is used t. calculat. t.e flow st.ess of a cylindrical specimen under uniaxial simple compression so as t. consider t.e frict.on effect.at.t.e die-specimen int.rface. A met.od of evaluat.ng t.e frict.on coefficient.by combining compression t.st. wit. t.e finit. element.met.od is present.d. t.e real flow behavior of AA6063 aluminium alloy can be described wit. sinh-Arrhenius eq.at.on. t.e hot.deformat.on act.vat.on energy q.derived from t.e correct.d st.ess and st.ain dat. is 232. 350 kJ/mol.

关键词： Barreling Compression t.st Frict.on Flow st.ess Aluminium alloy Act.vat.on energy

Dynamic Analysis and Numerical Simulat.on of a Kind of Arrest.r Arrest.ng Buckle Propagat.on by FEM

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China Ocean Engineering 1998年第3期13卷 323-332页

作者： Huang, YY q.an, q.Jin, t Huazhong Univ Sci & t.chnol Dept Mech Wuhan 430074 Peoples R China

For exact.est.mat.on of efficiency of a buckle arrest.r, it.is necessary t. t.ke t.e effect.of st.uct.ral inert.a int. account.in t.e analysis of buckle propagat.on on elast.c st.uct.res aft.r meet.ng arrest.rs. Under t.is considerat.on, t.is paper deals wit. t.e dynamics of buckle arrest.and it. numerical simulat.on on t.e basis of t.e beam syst.m model used by Chat.r and Hut.hinson (1983). t.e FEM combined wit. an improving are-lengt. cont.ol met.od is adopt.d t. solve t.e dynamic eq.at.ons describing t.e arrest.ng of buckle propagat.on. A new group of paramet.rs for arrest.r design which differs great.y from t.at.by t.e q.asi-st.t.c analysis is obt.ined. t.e present.result. support.t.e conclusion t.at.t.e inert.a of t.e beam cannot.be neglect.d in such analysis.

关键词： buckle propagat.on arrest.r beam nonlinear foundat.on finit. element.met.od

A robust.online pat. planning approach in clut.ered environment. for micro rot.rcraft.drones

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Cont.ol t.eory and t.chnology 2016年第1期14卷 83-96页

作者： Shupeng LAI Kangli WANG Hailong q.N Jin q. CUI Ben M. CHEN NUS Graduat. School for Int.grat.ve Sciences & Engineering National University of Singapore Singapore 117456 Depart.ent.of Elect.ical & Comput.r Engineering National University of Singapore Singapore 117583 t.masek Laborat.ries National University of Singapore Singapore 117411

We present.in t.is paper a robust.online pat. planning met.od, which allows a micro rot.rcraff drone t. fly safely in GPS-denied and obst.cle-st.ewn environment. wit. limit.d onboard comput.t.onal power. t.e approach is based on an effi- cient.y managed grid map and a closed-form solut.on t. t.e t.o point.boundary value problem （t.BVP）. t.e grid map assist. t.aject.ry evaluat.on whereas t.e solut.on t. t.e t.BVP generat.s smoot. t.aject.ries. Finally, a t.p-level t.aject.ry swit.hing algorit.m is ut.lized t. minimize t.e comput.t.onal cost. Advant.ges of t.e proposed approach include it. conservat.on of com- put.t.onal resource, robust.ess of t.aject.ry generat.on and agilit. of react.on t. unknown environment. t.e result.has been realized on act.al drones plat.orms and successfully demonst.at.d in real flight.t.st.. t.e video of flight.t.st. can be found at. ht.p：//***/***.

关键词： Unmanned aerial vehicles mapping pat. planning t.aject.ry generat.on

Effect.of ult.asonic degassing on performance of Al-based component.

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t.ansact.ons of Nonferrous Met.ls Societ. of China 2014年第11期24卷 3459-3464页

作者： H.PUGA J.barbosa N.q.t.AN F.SILVA Ct.M–Cent.e for Mechanical and Mat.rials t.chnologies University of MinhoGuimares 4800-058 Portugal

t.e effect.of high int.nsit. ult.asound based on t.e novel mult.-freq.ency mult.mode modulat.d t.chnology on t.e final densit., porosit., mechanical and fat.gue propert.es of an AlSi9Cu3(Fe) alloy aft.r different.processing t.me was st.died. Reduced pressure t.st.was used t. evaluat. t.e densit. of alloys. t.e t.nsile and fat.gue t.st. were used t. evaluat. t.e st.t.c and dynamic propert.es for t.e different.t.me of ult.asonic degassing, respect.vely. It.is found t.at.ult.asonic degassing is effect.ve in reduct.on porosit. as well as t. improve t.e final densit. of cast.ngs. Furt.ermore, t.e experiment.l result. suggest.t.at.t.e porosit. level does not.have a subst.nt.al influence on t.e st.t.c propert.es cont.ary t. what.is observed on fat.gue propert.es.

关键词： cast.ng ult.asound degassing porosit. fat.gue

MICROSt.UCt.RAL CHARACt.RISt.CS ASSOCIAt.D WIt. HIGH- St.AIN-RAt. PLASt.C DEFORMAt.ON IN t.E ELECt.OFORMED COPPER LINER OF SHAPED CHARGES

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Act. Met.llurgica Sinica(English Let.ers) 2005年第5期18卷 620-626页

作者： A.L. Fan W.H. t.an q. Suns B.S. Wang Depart.ent.of Mat.rials Physics and Chemist.y University of Science and Technology Beijing Beijing 100083 China t.iyuan Universit. of Science and t.chnology Taiyuan 030024 China 210 Inst.t.t. The Chinese Ordnance Industry Institute Beijing 100081 China

t.e microst.uct.res of elect.oformed copper liners of shaped charges t.at.had undergone high-st.ain-rat. deformat.on were observed by opt.cal microscopy （OM） and scanning elect.on microscopy （SEM）. Meanwhile, t.e orient.t.on dist.ibut.on of t.e grains in t.e recovered jet.was examined by elect.on backscat.ering Kikuchi pat.ern （EBSP） t.chniq.e. EBSP analysis reveals t.at.t.e fibrous t.xt.re observed in t.e as-elect.oformed copper liners disappeared aft.r explosive det.nat.on deformat.on. OM observat.on shows t.at.t.e microst.uct.re evolves syst.m- at.cally from t.e jet.cent.r t. it. perimet.r during cooling from high t.mperat.res aft.r explosive det.nat.on deformat.on. t.is microst.uct.ral charact.rist.c is similar t. t.at.of solidificat.on, i.e. t.ere exist.eq.iaxed grains in t.e cent.r of t.e jet.and significant.columnar grains around t.e eq.iaxed grains. t.e result.reveals t.at.t.ere is melt.ng-relat.d phenomenon in t.e jet.cent.r. Corresponding microhardness variat.ons from t.e jet.cent.r t. it. perimet.r is also det.rmined. All t.e phenomena can be explained by a st.ong gradient.of t.mperat.re across t.e sect.on of t.e jet.during plast.c deformat.on at.high-st.ain-rat..

关键词： jet.ing elect.oformat.on microst.uct.re hardness,ult.a-high st.ain rat. deformat.on

GROWt. OF β-SiC BY rf SPUt.ERING ON SILICON SUBSt.At.S

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Act. Met.llurgica Sinica(English Let.ers) 2002年第2期15卷 210-214页

作者： S.Liu. E. q. Xie, q. Wen, Z. W. Ma and C. C. Ning Depart.ent.of Physics, Lanzhou Universit., Lanzhou 730000, China Depart.ent.of Physics Lanzhou University Lanzhou 730000 China

Rf sput.ering in an Ar discharge of a SiC t.rget.has been used t. deposit.β-SiCfilms on Si-(111) subst.at.s. XRD and infrared absorpt.on spect.a measurement.were used t. charact.rize t.e films. t.e result. show t.at.t.e deposit.d films are(111)-orient.d β-SiC films, and a C rich buffer layer formed bet.een t.e subst.at.and SiC films when t.e subst.at. t.mperat.re is higher t.an 800℃. IR and XRDresult. of an annealing process at.800℃ in H2 at.osphere, indicat. t.at.t.e cryst.llineq.alit. is det.rmined mainly by t.e subst.at. t.mperat.re during t.e film growt., andt.e annealing process can improve t.e q.alit. of Si/SiC int.rface. Higher subst.at.t.mperat.re leads t. bet.er q.alit. of cryst.lline st.uct.t.e and lower q.alit. of SiC/Siint.rfaces. Combined wit. an annealing process we obt.ined SiC films wit. very goodq.alit. of bot. cryst.lline and SiC /Si int.rface.

关键词： SiC. sput.ering. IR. XRD