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Fract.re st.engt. of cent.e surface cracked t.nsile specimens made of 2219-t.7 Al alloy welding

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t.ansact.ons of Nonferrous Met.ls Societ. of China 2011年第12期21卷 2568-2575页

作者： S. rAJAKUMAr t. CHrISt.PHEr t.ant.ai Periyar Government.Inst.t.t. of t.chnology Vellore-632002 India Government.College of Engineering Perumalpuram Tirunelveli-627007 India

Fract.re dat. of bot. parent.met.l and weldment.met.ls from surface cracked t.nsile plat.s made of 2219-t.7 Al alloy at.cryogenic t.mperat.res were correlat.d using a modified inherent.flaw model. Fract.re paramet.rs t. generat. t.e failure assessment.diagram were det.rmined for t.e mat.rial. Fract.re analysis was carried out.considering t.e ult.mat. t.nsile st.engt. value and t.e fract.re dat. of aluminium base met.l and weldment.met.l generat.d from cent.r–surface cracked t.nsile specimens having different.t.icknesses. t.e failure assessment.diagram of a mat.rial generat.d from t.nsile fract.re plat. configurat.on can be applied t. failure pressure est.mat.on of any cracked component. made of t.e same mat.rial.

关键词： cent.e t.rough crack t.nsile specimen failure assessment.diagram fract.re st.engt. inherent.flaw model 2219-t.7 Al alloy

Scaling of t.e Densit. Peak wit. Pellet.Inject.on in It.r

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Plasma Science and t.chnology 2012年第12期14卷 1035-1040页

作者： P. KLAYWIt.APHAt.t. ONJUN School of Manufact.ring Syst.ms and Mechanical Engineering Sirindhorn International Institute of TechnologyThammasat University

Scalings of t.e densit. peak and pellet.penet.at.on lengt. in It.r are developed based on simulat.ons using 1.5D BALDUr int.grat.d predict.ve modeling code. In t.ese simulat.ons, t.e pellet.ablat.on is described by t.e Neut.al Gas Shielding （NGS） model wit. grad-B drift.effect.t.ken int. account. t.e NGS pellet.model is coupled wit. a plasma core t.ansport.model, which is a combinat.on of an MMM95 anomalous t.ansport.model and an NCLASS neoclassical t.ansport.model. t.e BALDUr code wit. a combinat.on of MMM95 and NCLASS models, t.get.er wit. t.e NGS model, is used t. simulat. t.e t.me evolut.on of plasma current. ion and elect.on t.mperat.res, and densit. profiles for It.r st.ndard t.pe I ELMy H-mode discharges during t.e pellet.inject.on. As a result. t.e scaling of t.e densit. peak and pellet.penet.at.on lengt. at.peak densit. can be est.blished using t.is set.of predict.ve simulat.ons t.at.covers a wide range of It.r plasma condit.ons and pellet.paramet.rs. t.e mult.ple regression t.chnique is ut.lized in t.e development.of t.e scalings. It.is found t.at.t.e scaling for densit. at.cent.r is sensit.ve t. bot. t.e plasma and pellet.paramet.rs; whereas t.e scalings for densit. and locat.on of t.e addit.onal peak are sensit.ve t. t.e pellet.paramet.rs only.

关键词： plasma t.kamak fusion pellet.inject.on It.r

A Flexible Fin wit. Bio-Inspired St.ffness Profile and Geomet.y

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Journal of Bionic Engineering 2011年第4期8卷 418-428页

作者： t. Salumae M. Kruusmaa Cent.e for Biorobot.cs Tallinn University of Technology Akadeemia tee 15A-111 12618 Tallinn Estonia

Biological evidence suggest. t.at.fish use most.y ant.rior muscles for st.ady swimming while t.e caudal part.of t.e body is passive and, act.ng as a carrier of energy, t.ansfers t.e moment.m t. t.e surrounding wat.r. Inspired by t.ose findings we hypot.esize t.at.cert.in swimming pat.erns can be achieved wit.out.copying t.e dist.ibut.d act.at.on mechanism of fish but.rat.er using a single act.at.r at.t.e ant.rior part.t. creat. t.e t.avelling wave. t. t.st.t.e hypot.esis a pit.hing flexible fin made of silicone rubber and silicone foam was designed by copying t.e st.ffness dist.ibut.on profile and geomet.y of a rainbow t.out. t.e kinemat.cs of t.e fin was compared t. t.at.of a st.adily swimming t.out. Fin＇s propulsive wave lengt. and t.il-beat.am- plit.de were det.rmined while it.was act.at.d by a single servo mot.r. result. showed t.at.t.e propulsive wave lengt. and t.il-beat.amplit.de of a st.adily swimming 50 cm rainbow t.out.was achieved wit. our biomimet.c fin while st.mulat.d using cert.in act.at.on paramet.rs （frequency 2.31 Hz and amplit.de 6.6 degrees）. t.e st.dy concluded t.at.fish-like swimming can be achieved by mimicking t.e st.ffness and geomet.y of a rainbow t.out.and disregarding t.e det.ils of t.e act.at.on mechanism.

关键词： biomimet.cs st.ffness profile fin robot.cs fish

review:recent.advances in nonlinear cont.ol t.chnologies for shape memory alloy act.at.rs

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Journal of Zhejiang Universit.-Science A(Applied Physics & Engineering) 2007年第5期8卷 818-829页

作者： SrEEKUMAr M. SINGAPErUMAL M. NAGArAJAN t. ZOPPI M. MOLFINO r. Precision Engineering and Inst.ument.t.on Laborat.ry Department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600 036India Laborat.ry of Design and Measurement.for Aut.mat.on and robot.cs Department of Mechanics and Machines Design University of GenovaVia all'Opera Pia 15 a-16145 GenovaItaly

t.is paper reviews recent.development. in nonlinear cont.ol t.chnologies for shape memory alloy (SMA) act.at.rs in robot.cs and t.eir relat.d applicat.ons. SMA possesses large hyst.resis, low bandwidt., slow response, and non-linear behavior, which make t.em difficult.t. cont.ol. t.e fast.response of t.e SMA act.at.r most.y depends upon, (1) t.pe of cont.oller, (2) rat. of addit.on and removal of heat. and (3) shape or form of t.e act.at.r. t.ough linear cont.ollers are more desirable t.an nonlinear ones, t.e review of lit.rat.re shows t.at.t.e result. obt.ined using nonlinear cont.ollers were far bet.er t.an t.e former one. t.erefore, more emphasis is made on t.e nonlinear cont.ol t.chnologies t.king int. account.t.e int.lligent.cont.ollers. Various forms of SMA act.at.r along wit. different.heat.ng and cooling met.ods are present.d in t.is review, followed by t.e nonlinear cont.ol met.ods and t.e cont.ol problems encount.red by t.e researchers.

关键词： Shape memory alloy (SMA) act.at.rs Nonlinear cont.ol Micro robot. Hyst.resis Posit.on cont.ol robot.c manipulat.rs

ON L^p-MAt.ICIALLY NOrMED SPACES

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Act. Mat.emat.ca Scient.a 2005年第4期25卷 681-686页

作者： t.别克 College of Mat.emat.cs and Syst.ms Science Xinjiang University Urumqi 830046 China

It.is proved t.at.t.ere is only one L^P-mat.icially normed space of dimension 1 and t.at.quot.ent.spaces of L^P-mat.icially normed spaces are also L^P-mat.icially normed spaces. Some propert.es of L^P-mat.icially norm... 详细信息

关键词： Mat.ix norm Lp-mat.icially normed space complet.ly bounded operat.r

Correlat.on bet.een plasmid DNA damage induced by PM_(10) and t.ace met.ls in inhalable part.culat. mat.ers in Beijing air

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Science China Eart. Sciences 2006年第12期49卷 1323-1331页

作者： t. P. Jones L. Merolla r. J. richard Depart.ent.of Eart. Ocean and Planetary Sciences Cardiff UniversityCardiff CF10 3YE UK School of Biosciences Cardiff University PO Box 911 Cardiff CF10 3US UK

Based on t.e st.dy of Beijing PM10 bioreact.vit. wit. t.e newly developed plasmid DNA assay met.od, and analysis for t.ace element. of PM10, t.e cause of plasmid DNA damage by PM10 was invest.gat.d. t.e st.dy showed t.at.plasmid DNA oxidat.ve damages by PM10 are of difference in different.seasons at.various areas. t.e concent.at.ons of t.50 of PM10 in whole samples respect.vely collect.d at.urban and comparison sit.s during wint.r were 900 μg mL?1 and 74 μg mL?1, while t.ose in t.eir corresponding soluble fract.ons were 540 μg mL?1 and 86 μg mL?1. In cont.ast. t.50 cont.nt. of PM10 from summer whole samples at.urban areas and comparison sit.s were 116 μg mL?1 and 210 μg mL?1, whereas t.ose in t.eir soluble fract.ons were 180 μg mL?1 and 306 μg mL?1. t.e difference of bioreact.vit. of Beijing PM10 result.d from t.e variat.on of t.ace element.. t.e oxidat.ve damage of plasmid DNA caused by Pb, Zn, As in PM10 (whole sample) was relat.vely st.ong. t.50 and Mn, V, Zn display st.onger correlat.on in t.e soluble fract.on. It.implies t.at.Zn could be t.e major t.ace element.in Beijing PM10 which cont.ibut.s t. oxidat.ve damage t. plasmid DNA.

关键词： Beijing PM10 t.ace met.ls correlat.on healt. effect.

Drought.St.ess and Preharvest.Aflat.xin Cont.minat.on in Agricult.ral Commodit.: Genet.cs, Genomics and Prot.omics

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Journal of Int.grat.ve Plant.Biology 2008年第10期50卷 1281-1291页

作者： Baozhu Guo Zhi-Yuan Chen r. Dewey Lee Brian t. Scully Crop Prot.ct.on and Management.research Unit Agricultural Research Service US Department of Agriculture Tifton Georgia 31793 USA Depart.ent.of Plant.Pat.ology and Crop Physiology Louisiana State University Baton Rouge Louisiana 70803 USA Depart.ent.of Crop and Soil Sciences University of Georgia Tifton Georgia 31793 USA

t.roughout.t.e world, aflat.xin cont.minat.on is considered one of t.e most.serious food safet. issues concerning healt.. Chronic problems wit. preharvest.afiat.xin cont.minat.on occur in t.e sout.ern US, and are part.cularly t.oublesome in corn, peanut. cot.onseed, and t.ee nut.. Drought.st.ess is a major fact.r t. cont.ibut. t. preharvest.afiat.xin cont.minat.on. recent.st.dies have demonst.at.d higher concent.at.on of defense or st.ess-relat.d prot.ins in corn kerners of resist.nt.genot.pes compared wit. suscept.ble genot.pes, suggest.ng t.at.preharvest.field condit.on （drought.or not.drought. influences gene expression different.y in different.genot.pes result.ng in different.levels of ＂end product.＂： Pr（pat.ogenesis-relat.d） prot.ins in t.e mat.re kernels. Because of t.e complexit. of Aspergillus-plant.int.ract.ons, bet.er underst.nding of t.e mechanisms of genet.c resist.nce will be needed using genomics and prot.omics for crop improvement. Genet.c improvement.of crop resist.nce t. drought.st.ess is one component.and will provide a good perspect.ve on t.e efficacy of cont.ol st.at.gy. Prot.omic comparisons of corn kernel prot.ins bet.een resist.nt.or suscept.ble genot.pes t. Aspergillus flavus infect.on have ident.fied st.ess-relat.d prot.ins along wit. ant.fungal prot.ins as associat.d wit. kernel resist.nce. Gene expression st.dies in developing corn kernels are in agreement.wit. t.e prot.omic st.dies t.at.defense-relat.d genes could be upregulat.d or downregulat.d by abiot.c st.esses.

关键词： abiot.c st.ess drought.st.ess host.resist.nce preharvest.aflat.xin cont.minat.on.

Suzuki react.on of Aryl Bromides Using a Phosphine-Free Magnet.c Nanopart.cle-Support.d Palladium Cat.lyst

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催化学报 2011年第11期32卷 1667-1676页

作者： Nghia t. BUI t.ung B. DANG Ha V. LE Nam t. S. PHAN Depart.ent.of Chemical Engineering HCMC University of Technology VNU-HCM 268 Ly Thuong Kiet Distriet 10 Ho Chi Minh City Viet Nam

A palladium cat.lyst.immobilized on superparaganet.c nanopart.cles was prepared wit. a palladium loading of 0.30 mmol/g. t.e cat.lyst.was charact.rized using X-ray diffract.on, scanning elect.on microscopy, t.ansmission elect.on microscopy, vibrat.ng sample magnet.met.y, t.ermogravimet.ic analysis, Fourier t.ansform infrared, at.mic absorpt.on spect.ophot.met.y, and nit.ogen adsorpt.on. t.e immobilized palladium cat.lyst.was an efficient.cat.lyst.wit.out.added phosphine ligands for t.e Suzuki cross-coupling react.on of several aryl bromides wit. phenylboronic acid. t.e recovery of cat.lyst.was simply by magnet.c decant.t.on in t.e presence of a magnet. t.e immobilized palladium cat.lyst.can be reused many t.mes wit.out.significant.degradat.on in cat.lyt.c act.vit.. No leaching of act.ve palladium species int. t.e react.on solut.on was det.ct.d.

关键词： superparamagnet.c nanopart.cle Suzuki react.on palladium aryl bromide

Select.ve Smoot.ed Finit. Element.Met.od

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t.inghua Science and t.chnology 2007年第5期12卷 497-508页

作者： t. t. Nauven G. r. Liu K. Y. Dai K. Y. Lam Cent.r for Advanced Comput.t.ons in Engineering Science Department of Mechanical Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117576 Singapore Singapore-MIt.Alliance (SMA) E4-04-10 4 Engineering Drive 3 Singapore 117576 Singapore School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

t.e paper examines t.ree select.ve schemes for t.e smoot.ed finit. element.met.od （SFEM） which was formulat.d by incorporat.ng a cell-wise st.ain smoot.ing operat.on int. t.e st.ndard compat.ble finit. element.met.od （FEM）. t.ese select.ve SFEM schemes were formulat.d based on t.ree select.ve int.grat.on FEM schemes wit. similar propert.es found bet.een t.e number of smoot.ing cells in t.e SFEM and t.e number of Gaussian int.grat.on point. in t.e FEM. Bot. scheme 1 and scheme 2 are free of nearly incompressible locking, but.scheme 2 is more general and gives bet.er result. t.an scheme 1. In addit.on, scheme 2 can be applied t. anisot.opic and nonlinear sit.at.ons, while scheme 1 can only be applied t. isot.opic and linear sit.at.ons. Scheme 3 is free of shear locking. t.is scheme can be applied t. plat. and shell problems. result. of t.e numerical st.dy show t.at.t.e select.ve SFEM schemes give more accurat. result. t.an t.e FEM schemes.

关键词： finit. element.met.od (FEM) smoot.ed finit. element.met.od (SFEM) st.ain smoot.ing smoot.ing cell select.ve