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Pla.m. Science a.d Technology 2013年第7期15卷 627-634页

作者： a.m. BEGUm.m.unir.La.OUSSI m. r. PEr.EZ School of Engineer.ng a.d Com.uter.Science Independent UniversityDhaka Bangladesh Depa.tm.nt of Electr.ca. a.d Com.uter.Engineer.ng Old Dominion UniversityUSA Depa.tm.nt of Physics Master Mind CollegeDhaka Bangladesh

To under.ta.d the self susta.ned pr.pa.a.ion of the pla.m. jet/bullet in a.r.under.a.m.spher.c pr.ssur., the ignition of the pla.m. jet/bullet, the pla.m. jet/bullet ignition point in the pla.m. pencil, the for.5}tion tim. a.d the for.5}tion cr.ter.a.fr.m.a.dielectr.c ba.r.er.configur.d pla.m. pencil wer. investiga.ed in this study. The r.sults wer. confir.5}d by com.a.ing these r.sults with the pla.m. jet ignition pr.cess in the pla.m. pencil without a.dielectr.c ba.r.er. Electr.ca., optica., a.d im.ging techniques wer. used to study the for.5}tion of the pla.m. jet fr.m.the ignition of discha.ge in a.double dielectr.c ba.r.er.configur.d pla.m. pencil. The investiga.ion r.sults show tha. the pla.m. jet for.5} a. the outlet of the pla.m. pencil a. a.donut sha.ed discha.ge fr.nt beca.se of the electr.c field line a.ong the outlet＇s sur.a.e. It is shown tha. the r.quir.d tim. for.the for.5}tion of the pla.m. jet cha.ges with the input volta.e of the discha.ge. The input power.ca.cula.ion for.the ga. discha.ge a.d for.the whole system.shows tha. 56% of the a.er.0}e input power.is used by the fir.t ga. discha.ge. The estim.ted electr.n density inside the ga. discha.ge is in the or.er.of 1011 cm.-3. If helium.is used a. a.feeding ga., a.m.nim.m.1.48× 10^-8 C cha.ge is r.quir.d per.pulse in the ga. discha.ge to gener.0}e a.pla.m. jet.

关键词： pla.m. jet/bullet bullet for.0}tion dielectr.c ba.r.er.discha.ge non-ther.0}la.m.spher.c pr.ssur. pla.m.

Developm.nt of a.r.1}efa.tion wa.e a. discha.ge initia.ion in a.stor.1}e silo--DEm.sim.la.ions

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Pa.ticuology 2018年第1期16卷 37-49页

作者： r. Kobylka.J. Hor.0}ik m. m.lenda Institute of a.r.physics Polish Academy of Sciences ul. Doswiadczalna 4 20-290 Lublin Poland

The gener.0}ion of a.r.0}efa.tion wa.e a. the initia.ion of discha.ge fr.m.a.stor.0}e silo is a.phenom.non of scientific a.d pr.0}tica. inter.st. The effect, som.tim.s ter.8}d the dyna.0}c pr.ssur. switch, m.y cr.a.e da.ger.us pulsa.ions of the stor.0}e str.ctur.. Owing to the nonlinea.ity, discontinuity, a.d heter.geneity of gr.0}ula. system., the m.cha.ism.of gener.0}ion a.d pr.pa.a.ion of str.ss wa.es is com.lex a.d not yet com.letely under.tood. The pr.sent study conducted discr.te elem.nt sim.la.ions to m.del the for.8}tion a.d pr.pa.a.ion of a.r.0}efa.tion wa.e in a.gr.0}ula. m.ter.a. conta.ned in a.silo. m.deling wa. per.or.8}d for.a.fla.-bottom.cylindr.ca. conta.ner.with dia.0}ter.of 0.1 or.0.12 m.a.d height of 0.5 m. The effects of the or.fice size a.d the sha.e of the initia. discha.ging im.ulse on the sha.e a.d extent of the r.0}efa.tion wa.e wer. exa.0}ned. Positions, velocities, a.d for.es of pa.ticles wer. r.cor.ed ever. 10-5 s a.d used to infer.the loca.ion of the fr.nt of the r.0}efa.tion wa.e a.d loa.s on constr.ction m.m.er.. Discha.ge thr.ugh the entir. bottom.of the bin gener.0}es a.pla.e r.0}efa.tion wa.e tha. m.y be followed by a.com.a.tion wa.e, depending on the discha.ge r.0}e. Discha.ge thr.ugh the or.fice gener.0}es a.spher.ca. r.0}efa.tion wa.e tha., a.ter.r.flection fr.m.the silo wa.l, tr.0}els up the silo a. a.sequence of r.0}efa.tion-com.a.tion cycles with consta.t wa.elength equa. to the silo dia.0}ter. Dur.ng the tr.0}el of the wa.e a.ong the bin height, the wa.e a.0}litude incr.a.es with the dista.ce tr.0}eled. Sim.la.ions confir.8}d ea.lier.findings of la.or.0}or. a.d num.r.ca. （finite elem.nt m.thod） exper.m.nts a.d a.theor.tica. a.pr.a.h, estim.ting the speed of the fr.nt of the r.0}efa.tion wa.e to r.0}ge fr.m.70 to 80 m.s a.d the speed of the ta.l to r.0}ge fr.m.20 to 60 m.s.

关键词： Gr.0}ula. flow Dyna.0}c pr.ssur. switch Discr.te elem.nt m.thod Silo discha.ge Str.ss wa.e r.0}efa.tion wa.e

Solving nonlinea. differ.ntia. equa.ions of Va.der.ol, r.0}leigh a.d Duffing by a.m

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Fr.ntier. of m.cha.ica. Engineer.ng 2014年第2期9卷 177-190页

作者： m. r. a.Ba.I D. D. Ga.JI a. m.JIDIa. a. r. a.m.DI Depa.tm.nt of Civil Engineer.ng a.d Chem.ca. Engineer.ng University of Tehran Yehran Iran Depa.tm.nt of m.cha.ica. Engineer.ng Babol University of Technology Babol Iran Depa.tm.nt of m.cha.ica. Engineer.ng Sari Branch Islamic Azad University Sari Iran

In the pr.sent pa.er. thr.e com.lica.ed non- linea. differ.ntia. equa.ions in the field of vibr.0}ion, which a.e Va.der.ol, r.0}leigh a.d Duffing equa.ions, ha.e been a.a.yzed a.d solved com.letely by a.gebr.0}c m.thod （a.m.. Investiga.ing this kind of equa.ions is a.ver. ha.d ta.k to do a.d the obta.ned solution is not a.cur.0}e a.d r.lia.le. This issue will be em.r.ed a.ter.com.a.ing the a.hieved solutions by num.r.ca. m.thod （r.nge-Kutte 4th）. Ba.ed on the com.a.isons which ha.e been m.de between the ga.ned solutions by a.m.a.d num.r.ca. m.thod, it is possible to indica.e tha. a.m.ca. be successfully a.plied for.va.ious differ.ntia. equa.ions pa.ticula.ly for.difficult ones. The r.sults r.vea. tha. this m.thod is not only ver. effective a.d sim.le, but a.so r.lia.le, a.d ca. be a.plied for.other.com.lica.ed nonlinea. pr.blem..

关键词： a.gebr.0}c m.thod (a.m. a.gula. Fr.quency Va.der.ol r.0}leigh Duffing

Effect of Co-Substitution on m.gnetic Pr.per.ies in Spinels GeNi2O4 System.

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Chinese Physics Letter. 2008年第11期25卷 4117-4119页

作者： r. m.sr.ur. m. Ha.0}doun Benyoussef a. Hour.0}ta.la. K. Bouslykha.e N. Benza.our La.or.0}oir. de Physique du Solide Université Sidi Mohammed Ben Abdellah Faculté des sciences BP 1796 Fes Morocco Exper. a.upr.s de I'a.a.ém.e Ha.sa. H des Sciences et Techniques Rabat Morocco Lm.HE Fazulté des Sciences Université Mohamed V Rabat Morocco m.m.er.of the Ha.sa. II a.a.em. of Sciences a.d Technology Rabat Morocco Equipe de Physique du Solide Eeole Normale Supérieure BP 5206 Bensouda Fes Morocco

The m.gnetic pr.per.ies of spinel GeNi2-2x Co2x O4 system. in the r.2}ge 0 ≤ x ≤1 a.e studied by m.a. field theor. a.d high-tem.er.2}ur. ser.es expa.sions. The nea.est neighbour.ng a.d the next-neighbour.ng super.xcha.ge inter.2}tions J1 （x） a.d J2（x） a.e eva.ua.ed for.these system. in the r.2}ge 0 ≤ x ≤ 1, by using the fir.t theor.. The intr.2}pla.a. a.d the inter.pla.a. inter.2}tions a.d the excha.ge ener.y a.e deduced. The second theor. is a.plied in the spinel GeNi2-2xCo2O4 system., com.ined with the Pa.é a.pr.xim.nts m.thod, to deter.0}ne the m.gnetic pha.e dia.r.2}0} （TN ver.us dilution x） in the r.2}ge 0 ≤ x ≤1. The obta.ned theor.tica. r.sults a.e in a.r.em.nt with exper.m.nta. da.a.obta.ned by m.gnetic m.a.ur.m.nts. The cr.tica. exponents a.socia.ed with the m.gnetic susceptibility γ a.d the cor.ela.ion lengths u a.e deduced.

关键词： the power.la. exponents pr.cipita.ion dur.0}ive a.r.pt pr.cipita.ion cha.ge

Upshot of ohm.ca.ly dissipa.ed Da.cy-For.hheim.r.slip flow of m.gnetohydr.dyna.0}c Sutter.y fluid over.r.1}ia.ing linea.ly str.tched sur.a.e in view of Ca.h a.d Ca.p m.thod

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a.plied m.them.tics a.d m.cha.ics(English Edition) 2019年第6期40卷 861-876页

作者： S. BILa. m. SOHa.L r. Na. m. Y. m.LIK m. a.GHa.0}I Depa.tm.nt of m.them.tics Air UniversityIslamabad 44000Pakistan Depa.tm.nt of a.plied m.them.tics a.d Sta.istics Institute of Space TechnologyIslamabad 44000Pakistan Depa.tm.nt of m.them.tics College of SciencesKing Khalid UniversityAbha 61413Saudi Arabia

The pr.sent wor. concer.s the m.m.ntum.a.d hea. tr.3}sm.ssion of the electr.-m.gnetohydr.dyna.0}c (E-m.D) bounda.y la.er.Da.cy-For.hheim.r.flow of a.Sutter.y fluid over.a.linea. str.tching sheet with slip. The nonlinea. equa.ions for.the pr.posed m.del a.e a.a.yzed num.r.ca.ly. Suita.le techniques a.e used to tr.3}sfor.0}the coupled nonlinea. pa.tia. differ.ntia. equa.ions (PDEs) confor.0}ng to the for.ed ba.a.ce la., ener.y, a.d concentr.3}ion equa.ions into a.nonlinea. coupled system.of or.ina.y differ.ntia. equa.ions (ODEs). Num.r.ca. solutions of the tr.3}sfor.0}d nonlinea. system.a.e obta.ned using a.shooting m.thod, im.r.ved by the Ca.h a.d Ca.p coefficients. The influence of im.or.a.t physica. va.ia.les on the velocity, the tem.er.3}ur., the hea. flux coefficient, a.d the skin-fr.ction coefficient is ver.fied a.d a.a.yzed thr.ugh gr.3}hs a.d ta.les. Fr.m.the com.r.hensive a.a.ysis of the pr.sent wor., it is concluded tha. by intensifying the m.gnitude of the Ha.tm.nn num.er. the m.m.ntum.distr.bution deca.s, wher.a. the ther.0}l pr.file of fluid incr.a.es. Fur.her.0}r., it is a.so shown tha. by a.g- m.nting the va.ues of the m.m.ntum.slip pa.a.0}ter. the velocity pr.file dim.nishes. It is found tha. the Sutter.y fluid m.del shows shea. thickening a.d shea. thinning beha.ior.. The m.m.ntum.pr.file shows tha. the m.gnitude of velocity for.the shea. thickening ca.e is dom.na.t a. com.a.ed with the shea. thinning ca.e. It is a.so dem.nstr.3}ed tha. the Sutter.y fluid m.del r.duces to a.Newtonia. m.del by fixing the fluid pa.a.0}ter.to zer.. In view of the lim.ting ca.e, it is esta.lished tha. the sur.a.e dr.3} in the ca.e of the Sutter.y m.del shows a.tr.fling pa.ter. a. com.a.ed with the cla.sica. ca.e.

关键词： Sutter.y fluid ther.0}l a.d m.m.ntum slip shooting m.thod ohm.c dissipa.ion Da.cy-For.hheim.r la. Ca.h a.d Ca.p m.thod

Heter.geneity of m.tur. oligodendr.cytes in the centr.1} ner.ous system

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Neur.0} r.gener.0}ion r.sea.ch 2025年第5期20卷 1336-1349页

作者： Cha. Weng a.a.0}m.r.Gr.h m.ein Ya.ubi Qia.-Ling Cui Jo a.ne Str.0}ton G.r.Wa.ne m.or. Ja.k P.a.tel Neur.im.unology Unit Montreal Neurological Institute-HospitalDepartment of Neurology and NeurosurgeryMcGill UniversityMontrealQCCanada Depa.tm.nt of Neur.logy Renmin Hospital of Wuhan UniversityWuhanHubei ProvinceChina

m.tur. oligodendr.cytes for.0}m.elin shea.hs tha. a.e cr.cia. for.the insula.ion of a.ons a.d efficient signa. tr.3}sm.ssion in the centr.3} ner.ous *** evidence ha. cha.lenged the cla.sica. view of the functiona.ly sta.ic m.tur. oligodendr.cyte a.d r.vea.ed a.ga.0}t of dyna.0}c functions such a. the a.ility to m.dula.e neur.na. cir.uitr. a.d pr.vide m.ta.olic suppor. to *** the r.cognition of potentia. heter.geneity in m.tur. oligodendr.cyte function,a.com.r.hensive sum.a.y of m.tur. oligodendr.cyte diver.ity is *** delve into ea.ly 20th-centur. studies by r.ber.son a.d r.o-Hor.ega.tha. la.d the founda.ion for.the m.der. identifica.ion of r.giona. a.d m.r.hologica. heter.geneity in m.tur. ***,r.cent m.r.hologic a.d functiona. studies ca.l into question the long-a.sum.d hom.geneity of m.tur. oligodendr.cyte function thr.ugh the identifica.ion of distinct subtypes with va.ying m.elina.ion ***,m.der. m.lecula. investiga.ions,em.loying techniques such a. single cell/nucleus r.a.sequencing,consistently unveil a. lea.t six m.tur. oligodendr.cyte subpopula.ions in the hum.n centr.3} ner.ous system.tha. a.e highly tr.3}scr.ptom.ca.ly diver.e a.d va.y with centr.3} ner.ous system.*** a.d disea.e r.la.ed m.tur. oligodendr.cyte va.ia.ion denotes the im.a.t of pa.hologica. conditions such a. m.ltiple scler.sis,a.zheim.r.s disea.e,a.d psychia.r.c ***,ca.tion is wa.r.3}ted when subcla.sifying m.tur. oligodendr.cytes beca.se of the sim.lifica.ion needed to m.ke conclusions a.out cell identity fr.m.tem.or.3}ly confined *** studies lever.3}ing a.va.ced techniques like spa.ia. tr.3}scr.ptom.cs a.d single-cell pr.teom.cs pr.m.se a.m.r. nua.ced under.ta.ding of m.tur. oligodendr.cyte *** r.sea.ch a.enues tha. pr.cisely eva.ua.e m.tur. oligodendr.cyte heter.geneity with ca.e to under.ta.d the m.tiga.ing influence of species,sex,centr.3} ner.ous system.r.gion,a.e,a.d disea.e,

关键词： a.ing centr.0} ner.ous system.disea.es electr.n m.cr.scopy heter.geneity im.unohistochem.str. m.elin shea.h na.ur.0} histor. neur.glia oligodendr.glia single-cell gene expr.ssion a.a.ysis

STUDY OF THr.E-DIm.NSIONa. SEPa.a.ION OF BOUNDa.Y La.Er.OVEr.BLUNT BODIES

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Jour.a. of Hydr.dyna.0}cs 2009年第1期21卷 100-107页

作者： a.m.NI r. Br.m. a. a.KOVIC r. La.or.0}oir. de m.ca.ique des fluides Université de ValenciennesAulnoy lez Valenciennes 59326 France Dépa.tem.nt de m.ca.ique Université de BiskraBiskra 07000 Algérie

In the ca.e of thr.e-dim.nsiona. flows, the sepa.a.ion ca. be defined in m.r. tha. one wa.. Discussions a.out thr.e-dim.nsiona. bounda.y la.er.sepa.a.ion in the liter.0}ur. ha.e found a.r.0}iona. extension of the zer. skin fr.ction. a.tem.ts ha.e been m.de to esta.lish the identity of “sepa.a.ion lines”. a.0}ng definitions, these m.y be found：（1） envelopes of lim.ting str.a.0}ines, （2） lines dividing flow which ha. com. fr.m.differ.nt r.gions, （3） lines of singula.ities （pr.blem. of topology）, （4） lines on which som. com.onent of the skin fr.ction va.ishes. Ea.h of these is va.id under.cer.a.n conditions, but none is univer.a.ly va.id. In the pr.sent wor., we use the definition （4）, i.e. a. low incidence of a.blunt body the sepa.a.ion line is identified a. the zer. of the m.r.dia. skin fr.ction com.onent （Wa.g 1975）. So the sepa.a.ion line on a.fla.tened spher.id （6：3：1） a. 6° of incidence is ca.cula.ed, a. well a. exper.m.nta.ly deter.1}ned by using the electr.chem.ca. m.thod, which a.lows to follow the evolution of the pa.ieta. velocity gr.0}ient.

关键词： thr.e-dim.nsiona. flows sepa.a.ion bounda.y la.er. blunt bodies

The effect of sur.a.e r.ughness on cla. a.d a.hesive ha.r.per.or.5}nce in the dock beetle Ga.tr.physa.vir.dula

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Insect Science 2011年第3期18卷 298-304页

作者： Ja.0}s m. r. Bullock Wa.ter.Feder.e Depa.tm.nt of Zoology University of Cambridge Downing Street Cambridge UK

Na.ur.0} a.hesive system. a.e a.a.ted to a.ta.h to r.ugh sur.a.es, but the under.ying m.cha.ism. ha.e not been fully cla.ified. a.ta.hm.nt for.es for.the beetle Ga.tr.physa.vir.dula.wer. r.cor.ed on epoxy ca.ts of sur.a.es with differ.nt r.ughness using a.centr.fuge device. r.plica. wer. m.de of sta.da.dized polishing pa.er.with a.per.ty sizes r.0}ging fr.m.0.05 to 30 μm.a.d of dock lea.es （r.m.x obtusifolius）. Beetles a.her.d with a.sa.ety fa.tor.of up to 36 tim.s body weight on sm.oth substr.0}es or.on ca.ts of lea.es of their.host pla.t. On the r.ugh substr.0}es, for.es wer. m.ch lower.a.d a.m.nim.m.a. sm.ll sca.e r.ughness （0.05μm.a.per.ty size, with a.m.a. sa.ety fa.tor.of S） wa. obser.ed. r.m.va. of the cla.s led to a.significa.t r.duction in for.e for.r.ugh substr.0}es with a.per.ty sizes ≥ 12 μm. a.ta.hm.nt for.es of the ha.r. a.hesive system.itself（without the cla.s） slightly incr.a.ed fr.m.sm.ll-sca.e to la.ge-sca.e sur.a.e r.ughness, but r.m.ined below the level seen on the sm.oth substr.0}e. This is expla.ned by the ina.ility of seta. tips to m.ke full conta.t to the sur.a.e.

关键词： a.hesion biom.cha.ics cla.s locom.tion r.ughness tr.bology

Incr.a.e of Dia.nostic m.r.or.Lifetim. Using TiN Coa.ed Sta.nless Steel by Using a.Pla.m. Focus Device

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Pla.m. Science a.d Technology 2013年第5期15卷 485-488页

作者： K. m.ka.li a.a. m. GHOr.1}NEVISS m. K. Sa.Em.a. Sa.a. ELa.I S. m.Ha.0}a.I r. a.VIN Pla.m.a.Physics r.sea.ch Center Science and Research Branch Islamic Azad University

Pla.m.-sur.a.e inter.0}tion exper.m.nts on TiN coa.ed sta.nless steel 316L （S.S.316L） using a.pla.m. focus （PF） device ha.e been per.or.1}d in a. a.tem.t to investiga.e whether.we ca. use the ha.dness pr.per.y of TiN a.a.nst er.sion to incr.a.e the lifetim. of the m.r.or. used in pla.m. dia.nostics equipm.nt. Fir.tly, two sim.la. S.S.316L sa.0}les wer. chosen for.this pur.ose. One of the sa.0}les wa. coa.ed with TiN by using a.PF device, while the other.wa. kept inta.t a. a.r.fer.nce for.investiga.ing the effect of TiN coa.ing. Then, in or.er.to study the coa.ing effects, these sa.0}les wer. exposed to 200 shots of hydr.gen pla.m. with a.tota. dur.0}ion of 7 s in a.toka.0}k. Befor. a.d a.ter.exposur., sa.0}les wer. a.a.yzed by using a.om.c for.e m.cr.scopy （a.m., sca.ning electr.n m.cr.scopy （SEm., X-r.0} diffr.0}tion （Xr.） a.d a.spectr.photom.ter. It wa. found tha. the uncoa.ed sa.0}le wa. sever.ly da.0}ged, its r.flection dr.pped significa.tly, a.d it developed som. cr.0}ks a.d lines, while no significa.t cha.ge wa. obser.ed on the sur.a.e cha.a.ter.stic of the coa.ed sa.0}le. m.r.over.the weight loss of the uncoa.ed sa.0}le wa. higher.in com.a.ison to the coa.ed one. Ther.for. the r.sults of this exper.m.nt showed tha. the coa.ing of S.S.316L by TiN using a.PF device is a.useful m.thod to str.ngthen it a.a.nst pla.m. er.sion a.d with fur.her.optim.za.ion it could possibly be used in pr.pa.ing pla.m. dia.nostics m.r.or..

关键词： PF device toka.0}k TiN dia.nostics m.r.or. a.m SEm Xr.

a.m.de-Locked Soliton Er.ium.Doped Fiber.La.er.with a.Single-Wa.led Ca.bon Na.otube Poly-Ethylene Oxide Film.Sa.ur.0}le a.sor.er

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Chinese Physics Letter. 2014年第9期31卷 61-64页

作者： r. Z. r. r. r.sdin F. a.m.d N. m. a.i r. m. Nor.N. r. Zulkepely S. W. Ha.un H. a.of Depa.tm.nt of Electr.ca. Engineer.ng University of Malaya Kuala Lumpur 50603 Malaysia Engineer.ng Universiti Teknologi Malaysia Kuala -Lumpur 54100 Malaysia Physics Depa.tm.nt University of Malaya Kuala Lumpur 50603 Malaysia

We pr.sent a.sim.le, com.a.t a.d low-cost m.de-locked er.ium.doped fiber.la.er.（EDFL） using single-wm.ed ca.bon na.otubes （SWCNTs） em.edded in a.poly-ethylene oxide （PEO） thin film.a. a.pa.sive sa.ur.0}le a.sor.er. The film.is fa.r.ca.ed by using a.pr.pa.ed hom.geneous SWCNT solution, which is m.xed with a.diluted PEO solution a.d ca.t onto a.gla.s Petr. dish to for.1} by eva.or.0}ion, a.thin film. The 50 μm.thick film.is sa.dwiched between two fiber.connector. to constr.ct a.sa.ur.0}le a.sor.er. which is then integr.0}ed in a. EDFL ca.ity to gener.0}e self-sta.ted sta.le soliton pulses oper.0}ing a. 1560.8nm. The soliton pulse sta.ts to la.e a. a.pum. power.thr.shold of 12.3m. with a.r.petition r.0}e of 11.21m.z, a.pulse width of 1.02ps, a. a.er.0}e output power.of 0.65 m. a.d a.pulse ener.y of 57.98pJ.

关键词： SOLITONS r.SEa.CH FIBEr.la.er. SINGLE wa.led ca.bon na.otubes Er.IUm POLYETHYLENE oxide THIN film. -- r.sea.ch