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Unst.ady Int.rnal Flow Condit.ons of Mini-Cent.ifugal Pump wit. Split.er Blades

Journal of t.ermal Science 2013年第1期22卷 86-91页

作者： t. Shigemit.u J. Fukut.mi K. Kaji t. Wada Inst.t.t. of t.chnology and Science The University of Tokushima Graduat. School of Advanced t.chnology and Science The University of Tokushima

Mini cent.ifugal pumps having a diamet.r smaller t.an lOOmm are employed in many fields. But.t.e design met.od for t.e mini cent.ifugal pump is not.est.blished because t.e int.rnal flow condit.on for t.ese small-sized fluid machines is not.clarified and convent.onal t.eory is not.suit.ble for small-sized pumps. t.erefore, mini cen- t.ifugal pumps wit. simple st.uct.re were invest.gat.d by t.is research. Split.er blades were adopt.d in t.is re- search t. improve t.e performance and t.e int.rnal flow condit.on of mini cent.ifugal pump which had large blade out.et.angle. t.e original impeller wit.out.t.e split.er blades and t.e impeller wit. t.e split.er blades were prepared for experiment. t.e performance t.st. are conduct.d wit. t.ese rot.rs in order t. invest.gat. t.e effect.of t.e split.er blades on performance and int.rnal flow condit.on of mini cent.ifugal pump. On t.e ot.er hand, a t.ree dimensional unst.ady numerical flow analysis was conduct.d t. invest.gat. t.e change of t.e int.rnal flow according t. t.e rot.r rot.t.on. It.is clarified from t.e experiment.l result. t.at.t.e performance of t.e mini cen- t.ifugal pump is improved by t.e split.er blades. t.e blade-t.-blade low velocit. region was suppressed in t.e case wit. t.e split.er blades. In addit.on t. t.at. t.e unst.ady flows near t.e volut. casing t.ngue were suppressed due t. t.e split.er blades. In t.e present.paper, t.e performance of t.e mini cent.ifugal pump is shown and t.e un- st.ady flow condit.on is clarified wit. t.e result. of t.e numerical flow analysis. Furt.ermore, t.e effect. of t.e split.er blades on t.e performance and t.e unst.ady int.rnal flow condit.on are invest.gat.d.

关键词： Mini-cent.ifugal pump Unst.ady flow condit.on Performance Split.er blades

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Inherit.d Wolff–Parkinson–Whit. Syndrome

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Cardiovascular Innovat.ons and Applicat.ons 2016年第B2期1卷 187-197页

作者： Yang Liu,md,phd Yumei Xue,md,phd Shulin Wu,md,FACC,FHRS Dan Hu,md,phd,FHRS Guangdong Cardiovascular Inst.t.t. Guangdong General HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China Depart.ent.of Molecular Genet.cs and Experiment.l Cardiology Masonic Medical Research LaboratoryUticaNY 13501USA

Wolff-Parkinson-Whit.(WPW)syndrome is a congenit.l disorder of cardiac conduct.on syst.m charact.rized by elect.ocardiographic preexcit.t.on and episodes of paroxysmal supravent.icular *** is caused by a cardiac development.l defect.in t.e elect.ical insulat.on bet.een t.e at.ia and t.e vent.icles due t. t.e presence of an accessory *** syndrome is a common cause of supravent.icular t.chycardia wit. benign ***,t.is clinical ent.t. also predisposes pat.ent. t. an increased risk of sudden cardiac deat.,especially in t.e set.ing of preexcit.d at.ial *** syndrome is usually sporadic and of unknown et.ology in most.*** t.e past.0years,a signifi cant.herit.ble fact.r is increasingly *** cat.on of t.e genet.c basis among pat.ent. wit. WPW syndrome has import.nt.implicat.ons for underst.nding t.e molecular mechanism of vent.icular preexcit.t.on and t.e development.of t.erapeut.c st.at.gies for risk st.at.fi cat.on and *** goal of t.is review is t. examine t.e previous st.dies on heredit.ry variant.,as well as t. out.ine pot.nt.al fut.re avenues t.ward defi ning t.e herit.bilit. of WPW syndrome.

关键词： Wolff-Parkinson-Whit. syndrome vent.icular preexcit.t.on genet.cs

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Cyclic liquefact.on screening of sand wit. non-plast.c fines:Crit.cal st.t. approach

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Geoscience Front.ers 2020年第2期11卷 429-438页

作者： md.Mizanur Rahman t.Sit.aram Nat.ral and Built.Environment. Research Cent.e(NBERC) School of Natural and Built EnvironmentsUniversity of South AustraliaMawson LakesSA 5095Australia Depart.ent.of Civil Engineering Indian Institute of Science(IISc)BangaloreIndia

t.ere have been significant.advances in t.e applicat.on of crit.cal st.t.,CS,in liquefact.on pot.nt.al *** was done by comparing st.t. paramet.r,j wit. est.mat.d charact.rist.c cyclic st.ess rat.o,CSR due t. an eart.quake.A cyclic resist.nce rat.o,CRR curve,which can be det.rmined from cyclic liquefact.on t.st.,separat.s hist.rical liquefied and non-liquefied dat. point.(j,CSR).On t.e ot.er hand,t.e concept. of equivalent.granular st.t. paramet.r,j*,which was developed for sands wit. fines,can be used in lieu j t. provide a unifying framework for charact.rizing t.e undrained response of sands wit. non/low plast.cit. fines,irrespect.ve of fines cont.nt.fc).t.e present.work combines t.ese t.o proposit.ons,and by merely subst.t.t.ng j*for j int. t.e aforement.oned CS approach t. capt.re t.e influence of fc.A series of st.t.c and cyclic t.iaxial t.st. were conduct.d,separat.ly and independent.y of t.e concept.of j*,for sand wit. up t. fc of 30%.t.e clean sand was collect.d from Sabarmat. river belt.at.Ahmedabad cit. in India which was severely affect.d during t.e Bhuj eart.quake,*** experiment.l dat. gave a single relat.on for CRR and j*which was t.en used t. assess liquefact.on pot.nt.al for a SPt.based case st.dy,where fc varies along t.e *** predict.on mat.hed wit. t.e field observat.on.

关键词： Crit.cal st.t. St.t. paramet.r Liquefact.on Sands Fines Const.t.t.ve model

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MULt.-FACILIt. ORDERED MEDIAN PROBLEMS IN DIRECt.D NEt.ORKS

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Journal of Syst.ms Science & Complexit. 2011年第1期24卷 61-67页

作者： Huajun t.NG t. C. Edwin CHENG C. t. NG Facult. of Management.and Administ.at.on Macao University of Science and Technology Macao China Depart.ent.of Logist.cs and Marit.me St.dies The Hong Kong Polytechnic University Hong Kong China

t.is paper uses a finit. dominat.ng set.（FDS） t. invest.gat. t.e mult.-facilit. ordered median problem （OMP） in a st.ongly connect.d direct.d net.ork. t.e aut.ors first.prove t.at.t.e mult.-facilit. OMP has an FDS in t.e node set. which not.only generalizes t.e FDS result.provided by Kalcsics, et.al. （2002）, but.also ext.nds t.e FDS result.from t.e single-facilit. Case t. t.e mult.ple case, filling an import.nt.gap. t.en, based on t.is FDS result. t.e aut.ors develop an exact.algorit.m t. solve t.e problem. However, if t.e number of facilit.es is large, it.is not.pract.cal t. find t.e opt.mal solut.on, because t.e mult.-facilit. OMP in direct.d net.orks is NP-hard. Hence, we present.a const.nt.approximat.on algorit.m for t.e p-median problem in direct.d net.orks. Finally, we pose an open problem for fut.re research.

关键词： Algorit.ms finit. dominat.ng set. mult.-facilit. ordered median problem pseudoequilibria.

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Variat.onal analysis of t.ermomechanically coupled st.ady-st.t. rolling problem

引用

Applied Mat.emat.cs and Mechanics(English Edit.on) 2013年第11期34卷 1361-1372页

作者： t. A. ANGELOV Inst.t.t. of Mechanics Bulgarian Academy of Sciences

A st.ady-st.t., rigid-plast.c rolling problem for t.mperat.re and st.ain-rat. dependent.mat.rials wit. nonlocal frict.on is considered. A variat.onal formulat.on is derived, coupling a nonlinear variat.onal inequalit. for t.e velocit. and a nonlinear vari- at.onal equat.on for t.e t.mperat.re. t.e exist.nce and uniqueness result. are obt.ined by a proposed fixed point.met.od.

关键词： st.ady-st.t. rolling rigid-t.ermoviscoplast.c mat.rial nonlocal frict.on,fixed point.met.od variat.onal analysis

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Nit.ogen-doped graphene quant.m dot.: Opt.cal propert.es modificat.on and phot.volt.ic applicat.ons

引用

Nano Research 2019年第5期12卷 1041-1047页

作者： md t.nvir Hasan roberto Gonzalez-Rodriguez Conor Ryan Krist.f Pot. Kayla Green Jeffery L.Coffer Ant.n V.Naumov Depart.ent.of Physics and Ast.onomy Texas Christian UniversityTCU Box 298840Fort WorthTexas 76129USA Depart.ent.cf Chemist.y and Eiochemist.y Texas Christian UniversityTCU Box 298860Fort WorthTexas 76129USA

In t.is work,we ut.lize a bot.om-up approach t. synt.esize nit.ogen self-doped graphene quant.m dot. (NGQDs) from a single glucosamine precursor via an eco-friendly microwave-assist.d hydrot.ermal *** and opt.cal propert.es of as-produced NGQDs are furt.er modified using cont.olled ozone ***-t.eat.d NGQDs (Oz-NGQDs) are reduced in size t. 5.5 nm wit. clear changes in t.e lat.ice st.uct.re and/D//G Raman rat.os due t. t.e int.oduct.on/alt.rat.on of oxygen-cont.ining funct.onal groups det.ct.d by Fourier-t.ansform infrared (Ft.R) spect.omet.r and furt.er verified by energy dispersive X-ray spect.oscopy (EDX) showing increased at.mic/weight.percent.ge of oxygen *** wit. st.uct.ral modificat.ons,GQDs experience decrease in ult.aviolet.visible (UV-vis) absorpt.on coupled wit. progressive enhancement.of visible (up t. 16 min t.eat.ent. and near-infrared (NIR)(up t. 45 min t.eat.ent. *** allows fine-t.ning opt.cal propert.es of NGQDs for solar cell applicat.ons yielding cont.olled emission increase,while cont.olled emission quenching was achieved by eit.er blue laser or t.ermal *** Oz-NGQDs were furt.er used t. form a phot.act.ve layer of solar calls wit. a maximum efficiency of 2.64% providing a 6-fold enhancement.over unt.eat.d NGQD devices and a 3-fold increase in fill fact.r/current.*** st.dy suggest. simple rout.s t. alt.r and opt.mize opt.cal propert.es of scalably produced NGQDs t. boost.t.e phot.volt.ic performance of solar cells.

关键词： nit.ogen-doped graphene quant.m dot. ozone t.eat.ent opt.cal propert.es phot.volt.ics solar cells

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Opt.cal charact.rist.cs and mechanical propert.es of opt.cal t.in films on weat.ered subst.at.s

引用

Chinese Opt.cs Let.ers 2013年第13期11卷 76-79页

作者： t. Nakayama H. Murot.ni t. Harada Course of Elect.o Phot. Opt.cs Graduate School of Engineering Tokai University Kanagawa Japan

t.in films used for opt.cal component. require improvement. in t.eir mechanical propert.es and long-t.rm st.bilit.. We examine t.e influence of subst.at. weat.ering on opt.cal t.in films. t.e light.scat.ering of t.O2 t.in films increased as t.e subst.at. is weat.ered. t.e light.scat.ering of t.e t.O2 t.in film formed by ion-assist.d deposit.on （IAD） is smaller t.an t.at.of t.e t.O2 t.in film formed by elect.on beam deposit.on （EBD）.

关键词： Light.scat.ering

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Algebraic t.eat.ent.of t.e MIC-Kepler Syst.m in Spherical Coordinat.s

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Chinese Physics Let.ers 2007年第8期24卷 2173-2176页

作者： M. t. Chefrour Depart.ment.de Physique Institut des Sciences Centre Universitaire de Souk-Ahras Souk-Ahras Algerie

t.e MIC-Kepler syst.m is st.died via t.e Milsht.in St.akhovenko variant.of t.e so（2,1） Lie algebra. Green＇s funct.on is const.uct.d in spherical coordinat.s, wit. t.e help of t.e Kust.anheimo St.efel variables and t.e generat.rs of t.e S0（2,1） group. t.e energy spect.um and t.e normalized wavefunct.ons of t.e bound st.t.s are obt.ined.

关键词： FIELD

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On t.e role of t.e uncert.int. principle in superconduct.vit. and superfluidit.

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Chinese Physics B 2012年第7期21卷 125-131页

作者： roberto Onofrio Dipart.ment. di Fisica e Ast.onomia"Galileo Galilei" Universitàdi PadovaVia Marzolo 8Padova 35131Italy It.MP Harvard-Smithsonian Center for Astrophysics60 Garden StreetCambridgeMA 02138USA

We discuss t.e general int.rplay bet.een t.e uncert.int. principle and t.e onset.of dissipat.onless t.ansport.phenomena such as superconduct.vit. and superfluidit.. We argue t.at.t.ese phenomena are possible because of t.e robust.ess of many-body quant.m st.t.s wit. respect.t. t.e ext.rnal environment. which is direct.y relat.d t. t.e uncert.int. principle as applied t. coordinat.s and moment. of t.e carriers. In t.e case of superconduct.rs, t.is implies relat.onships bet.een macroscopic quant.t.es such as crit.cal t.mperat.re and crit.cal magnet.c field, and microscopic quant.t.es such as t.e amount.of spat.al squeezing of a Cooper pair and it. correlat.on t.me. In t.e case of ult.acold at.mic Fermi gases, t.is should be paralleled by a connect.on bet.een t.e crit.cal t.mperat.re for t.e onset.of superfluidit. and t.e corresponding crit.cal velocit.. t.st. of t.is conject.re are finally sket.hed wit. part.cular regard t. t.e underst.nding of t.e behaviour of superconduct.rs under ext.rnal pressures or mesoscopic superconduct.rs, and t.e possibilit. t. mimic t.ese effect. in ult.acold at.mic Fermi gases using Feshbach resonances and at.mic squeezed st.t.s.

关键词： superconduct.vit. superfluidit. uncert.int. principle squeezed st.t.s

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Cosmic ray energy spect.um from measurement. of air showers

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Front.ers of physics 2013年第6期8卷 748-758页

作者： t. K. Gaisser t. St.nev S. t.lav Bart.l Research Inst.t.t. and Depart.ent.of Physics and Ast.onomy University of Delaware Newark DE 19716 USA

t.is review focuses on high-energy cosmic rays in t.e PeV energy range and above. Of part.cular int.rest.is t.e knee of t.e spect.um around 3 PeV and t.e t.ansit.on from cosmic rays of Galact.c origin t. part.cles from ext.a-galact.c sources. Our goal is t. est.blish a baseline spect.um from 1014 t. 10^20 eV by combining t.e result. of many measurement. at.different.energies. In combinat.on wit. measurement. of t.e nuclear composit.on of t.e primaries, t.e shape of t.e energy spect.um places const.aint. on t.e number and spect.a of sources t.at.may cont.ibut. t. t.e observed spect.um.

关键词： cosmic radiat.on air showers

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