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Erbium-Doped Zirconia.a.umina.Silica.Gla.s-Ba.ed Fiber a. a.Sa.ura.le a.sorber for High Repetition Ra.e Q-Switched a.l-Fiber La.er Genera.ion

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Chinese Physics Letters 2017年第8期34卷 63-66页

作者： P. Ha.sha.a.dha. Reddy N. a. a. Ka.ir M. C. paul S, Da. a. Dha. E. I. Isma.l a. a. La.iff S. W. Ha.un Fiber Optics a.d Photonics Division CSIR-Central Glass and Ceramic Research Institute Kolkata 700032 India a.a.emy of Scientific a.d Innova.ive Resea.ch CSIR-CGCRI Campus Kolkata 700032 India Depa.tment of Electrica. Engineering Faculty of Engineering University of Malaya Kuala Lumpur 50603 Malaysia Photonics Resea.ch Centre University of Malaya Kuala Lumpur 50603 Malaysia Fa.ulty of Electronic a.d Computer Engineering (FKEKK) Universiti Teknikal Malaysia Melaka Melaka 76100 Malaysia

We propose a.d demonstra.e a.Q-switched erbium-doped fiber la.er （EDFL） using a. erbium-doped zirconia.a.umina.silica.gla.s-ba.ed fiber （Zr-EDF） a. a.sa.ura.le a.sorber. a. a.16-cm-long Zr-EDF is incorpora.ed into a.ring EDFL ca.ity, a.sta.le Q-switching pulse tra.n opera.ing a. 1565？nm wa.elength is successfully obta.ned. The repetition ra.e is tuna.le from 33.97？kHz to 71.23？kHz by increa.ing the pump power from the threshold of 26？mW to the ma.imum of 74？mW. The highest pulse energy of 26.67？nJ is obta.ned a. the ma.imum pump power.

关键词： EDF Zr Erbium-Doped Zirconia.a.umina.Silica.Gla.s-Ba.ed Fiber a. a.Sa.ura.le a.sorber for High Repetition Ra.e Q-Switched a.l-Fiber La.er Genera.ion kHz a.

Three X-ra. fla.es nea. prima.y eclipse of the RS CVn bina.y XY UMa

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Resea.ch in a.tronomy a.d a.trophysics 2016年第8期16卷 127-134页

作者： Ha.g Gong Ra.hel Osten Thoma. Ma.ca.one Fa.io Rea.e Ji-Feng Liu paul a. Heckert Key La.ora.ory of Optica. a.tronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China Spa.e Telescope Science Institute 3700 San Martin Drive Baltimore MD 21218 USA Center for a.trophysica. Sciences Johns Hopkins University Baltimore MD 21218 USA Depa.tment of Physics Texas Tech University Lubbock TX 79409 USA Dipa.timento di Fisica.e Chimica Universita di Palermo Piazza del Parlamento 1 90134 Palermo Italy INa./Osserva.orio a.tronomico di Pa.ermo Piazza del Parlamento 1 90134 Palermo Italy College of a.tronomy a.d Spa.e Science University of Chinese Academy of Sciences Beijing 100049 China depa.tment of chemistry a.d physics western carolina university，Cullowhee，NC 28723，USA

We report on a. a.chiva. X-ra. observa.ion of the eclipsing RS CVn bina.y XY UMa.（Porb≈0.48 d）. In two Cha.dra.a.IS observa.ions spa.ning 200 ks a.d a.most five orbita. periods, three fla.es occurred. We find no evidence for eclipses in the X-ra. flux. The fla.es took pla.e a.ound times of prima.y eclipse, with one fla.e occurring shortly （〈 0.125 Porb） a.ter a.prima.y eclipse, a.d the other two ha.pening shortly （〈 0.05/9orb） before a.prima.y eclipse. Two fla.es occurred within roughly one orbita. period （△Ф≈ 1.024 Porb） of ea.h other. We a.a.yze the light curve a.d spectra.of the system, a.d investiga.e corona. length sca.es during both quiescence a.d fla.es, a. well a. the timing of the fla.es. We explore the possibility tha. the fla.es a.e orbit-induced by introducing a.sma.l orbita. eccentricity, which is quite cha.lenging for this close bina.y.

关键词： sta.s bina.ies -- sta.s fla.e -- sta.s a.tivity -- X-ra.s sta.s

Ga. Quenching Sma.l Components

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材料热处理学报 2004年第5期25卷 494-497页

作者： paul Stra.ton BOC Sheffield UK

Ga. quenching is a. environmenta.ly friendly a.d effective wa. of quenching components. However it ha. not been possible to a.ply it to sma.l components beca.se of the difficulties of jigging. a.method of ga. quenching such sma.l components is described in which they a.e levita.ed in a.confined ga. strea.. The method is suita.le for quenching low a.loy steel components tha. weigh between 1 a.d lOg.

关键词：气体流淬火悬浮低合金钢热处理

On the Contribution of Wu Wen-Tsün to a.gebra.c Topology

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Journa. of Systems Science & Complexity 2019年第1期32卷 3-36页

作者： BRa.SELET Jea.-paul I2M (CNRS)-a.x-Ma.seille University

The a.m of this a.ticle is to present the contribution of Wu Wen-Tsün to a.gebra.c Topology a.d more precisely to the theory of cha.a.teristic cla.ses. Severa. pa.ers provide complete a.d welldocumented biogra.hy a.d a.a.emic ca.eer of Wu Wen-Tsün, in pa.ticula., Hudecek, 2014; O'Connor a.d Robertson, 2006; Wen-Tsün Wu's a.a.emic Ca.eer, 2006; Selected works of Wen-Tsun Wu, *** a.thor does not repea. the deta.ls provided in these pa.ers concerning the Wu Wen-Tsün's bibliogra.hy, we will just mention people involved in the Wu Wen-Tsün's period in *** a.dition to Wu Wen-Tsün's pa.ers, the Dieudonné's book(Dieudonné, 1960) provides a. excellent presenta.ion of ma.n results of Wu Wen-Tsün in a.gebra.c a.d Differentia. Topology. The a.thor will use a.d a.use of this book(a.d refer to) when *** the introduction, the a.thor reca.ls ma.nly historica. fa.ts concerning the contribution of Wu Wen-Tsün to a.gebra.c Topology. The second section shows speci?ca.ly the contribution of Wu WenTsün to the Stiefel-Whitney cla.ses a.d introduces the third section, dea.ing with the(rea.) Wu *** a.thor provides de?nition, properties a. well a. further developments a.d genera.iza.ions of the Wu cla.ses. The fourth a.d ?fth sections a.e devoted to recent a.plica.ions: In Cobordism theory a.d in Ma.hema.ica. Physics. The a.thor notices tha. Wu cla.ses ha.e been used a. well in other doma.ns,in pa.ticula. surgery theory(Ma.sen a.d Milgra., 1979). The la.t section concerns the complex Wu cla.ses a.d shows tha. the more recent Ma.her cla.ses coincide with the previously de?ned complex Wu cla.ses, tha. is a.result from Zhou(1994)(see a.so Liu, 1996).This a.ticle is devoted to the contribution of Wu Wen-Tsün to the theory of Cha.a.teristic Cla.ses,which coincides with his "French period"(1947–1951). However, spea.ing of a.gebra.c Topology, it is worthwhile to mention the importa.t contribution of Wu Wen-Tsün to the Theory of rea.iza.ion of complexes or ma.ifolds in Eucl

关键词： a.gebra.c topology cha.a.teristic cla.s cobordism theory ma.hema.ica. physics Wu Cla.s

Ma.eria.s a.d susta.na.le development

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Progress in Na.ura. Science:Ma.eria.s Interna.iona. 2010年第1期20卷 16-29页

作者： paul KOLTUN CSIRO Process Science and EngineeringGate 5Normanby Rd.ClaytonVictoria3168Australia

Susta.na.le development is a.concept,which involves socia.,ecologica. a.d economic objectives,a.d requires to susta.n the integrity of resources exploita.ion,the direction of investments,the orienta.ion of technologica. development a.d institutiona. *** there is still much confusion a.d conflict a.out exa.t mea.ing of susta.na.le development,ma.y a.ree tha. susta.na.le development is a.out sa.isfying socia.,environmenta.,a.d economic *** the concept is genera.ly a.cepted a.d rela.ively ea.y to comprehend,the difficulty a.ises in trying to a.ply the principles of susta.na.le development in *** of the difficulties is need to mea.ure the"level of susta.na.ility".The desira.le cha.a.teristics for susta.na.ility indica.ors ha.e to include: simple to ca.cula.e,useful for decision ma.ing,a.d robust in indica.ing progress towa.d *** exergy a.a.ysis a.proa.h ba.ed on full life cycle a.sessment(LCa.of the ma.eria.s a.d technologies is a.useful metrics to eva.ua.e mitiga.ion of greenhouse ga.(GHG)emissions a.socia.ed with industria. eco ma.eria.s a.d *** metrics is used for reducing dimensiona.ity on the input side by combining ma.eria. a.d energy strea.s a.d output side reducing different cha.a.terisa.ion fa.tors to a.single"unsusta.na.ility"indica.or in a.theoretica.ly rigorous *** a.opted a.proa.h ha. been illustra.ed on a.few exa.ples a.socia.ed with a.stra.ia. a.uminium industry.

关键词： susta.na.ility mea.urement exergy a.a.ysis life cycle a.sessment(LCa. eco-efficiency

Using FTIR spectroscopy to detect sericin on historic silk

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Science China.Chemistry 2010年第3期53卷 625-630页

作者： WYETH paul Textile Conserva.ion Centre University of Southampton Winchester Campus

Silks represent some of the most precious a.cient a.d historic textile a.tefa.ts in collections *** optimum preserva.ion dema.ds a. a.precia.ion of their *** importa.t concern,especia.ly with rega.d to a.cient Chinese silks,is whether the fa.rics ha.e been *** with remna.t sericin gum coa.ing the fibroin fibres would require different conserva.ion *** previous resea.ch on a.ed silks,the presence of sericin ha. been inferred from a.ino a.id a.a.ysis of *** the study reported here,the potentia. of FTIR spectroscopy to provide a.simpler a.d ra.id method of detecting sericin on silk ha. been *** fibroin a.d sericin exhibit singula. IR *** tota. reflecta.ce spectroscopy wa. found to highlight the sericin coa.ing more effectively tha. tra.smission a.d reflecta.ce *** pa.ticula. pea. intensity ra.ios were identified which might provide a.qua.tita.ive estima.e of the sericin content of new silk,to a.sensitivity of 1%-2%.These were a.so shown to be va.id indica.ors for the presence of sericin on a.tificia.ly a.ed a.d a.cha.ologica. silks,a.though qua.tita.ion wa. now not *** the pea. intensity ra.ios,two signa.ure pea.s were a.so seen to be useful ma.kers for silk fibroin,a.d their presence in a.spectrum could be used to infer a.degummed silk.

关键词： infra.ed spectroscopy a.tenua.ed tota. reflecta.ce spectroscopy historic silk

Rea.-time seismology for the 05/12/2008 Wenchua. ea.thqua.e of China. a.retrospective view

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Science China.Ea.th Sciences 2009年第2期52卷 155-165页

作者： paul SOMMERVILLE United Resea.ch Services Corpora.ion

The deva.ta.ing 05/12/2008 Wenchua. ea.thqua.e (Mw7.9) in Sichua. Province of China.showed very few precursory phenomena.a.d occurred on a.fa.lt system once a.signed to be of modera.e long term seismic risk. Given the existing covera.e of seismogra.h sta.ions in Sichua. Province, rea.-time seis-mology could ha.e been effective in a.oiding some ea.thqua.e da.a.e a.d helping post-ea.thqua.e emergency response. In a.retrospective view, we demonstra.ed tha. the epicenter ca. be loca.ed with 20 km a.cura.y using just two broa.ba.d sta.ions with three-component, which ta.es only a.out 10 s a.ter the onset of the ea.thqua.e. Initia. ma.nitude is estima.ed to be M7 with the Tc mea.urement over first 4 seconds of P wa.es. Better ma.nitude estima.e ca. be obta.ned within 2 min by modeling Pnl wa.es for sta.ions a.out 500 km a.a. where the S wa.eforms a.e clipped. The rupture a.ea.is well revea.ed by teleseismica.ly-recorded >M5 ea.ly a.tershocks within two hours a.ter the ma.nshock. Within a.few hours, teleseismic body wa.es were inverted to derive a.more deta.led rupture process a.d the finite fa.lt model ca. be rea.ily used to ca.cula.e ground motions, thus providing vita. informa.ion for rescue efforts in the ca.e where no rea.-time strong motion records a.e a.a.la.le.

关键词： rea.-time seismology ea.thqua.e ea.ly wa.ning strong ground motion ra.id loca.ion

S-wa.e crusta. a.d upper ma.tle's velocity structure in the ea.tern Tibeta. Pla.ea.——Deep environment of lower crusta. flow

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Science China.Ea.th Sciences 2008年第2期51卷 263-274页

作者： paul SILVER Ca.negie Institution of Wa.hington Washington DC 20015 USA

a.teleseismic profile consisting of 26 sta.ions wa. deployed a.ong 30°N la.itude in the ea.tern Tibeta. Pla.ea.. By use of the inversion of P-wa.e receiver function, the S-wa.e velocity structures a. depth from surfa.e to 80 km benea.h the profile ha.e been determined. The inversion results revea. tha. there is significa.t la.era. va.ia.ion of the crusta. structure between the tectonic blocks on the profile. From Linzhi north of the ea.tern Hima.a.a. Synta.is, the crust is gra.ua.ly thickened in NE direction; the crusta. thickness rea.hes to the ma.imum va.ue (~72 km) a. the Ba.gong-Nujia.g suture, a.d then decrea.ed to 65 km in the Qia.gta.g block, to 57―64 km in the Ba.a. Ha. block, a.d to 40―45 km in the Sichua. Ba.in. The ea.tern segment of the teleseismic profile (to the ea.t of Ba.a.g) coincides geogra.hica.ly with the Zhuba.ong-Zizhong deep seismic sounding profile ca.ried out in 2000, a.d the S-wa.e velocity structure determined from receiver functions is consistent with the P-wa.e velocity structure obta.ned by deep seismic sounding in respect of the depths of Moho a.d ma.or crusta. interfa.es. In the Qia.gta.g a.d the Ba.a. Ha. blocks, the lower velocity la.er is widesprea. in the lower crust (a. depth of 30―60 km) a.ong the profile, while there is a.norma. velocity distribution in lower crust in the Sichua. Ba.in. On a. a.era.e, the crusta. velocity ra.io (Poisson ra.io) in tectonic blocks on the profile is 1.73 (σ = 0.247) in the Lha.a.block, 1.78 (σ = 0.269) in the Ba.ggong-Nujia.g suture, 1.80 (σ = 0.275) in the Qia.gta.g block, 1.86 (σ = 0.294) in the Ba.a. Ha. blocks, a.d 1.77 (σ = 0.265) in the Ya.gtze block, respectively. The Qia.gta.g a.d the Ba.a. Ha. blocks a.e cha.a.terized by lower S-wa.e velocity a.oma.y in lower crust, complica.ed Moho tra.sition, a.d higher crusta. Poisson ra.io, indica.ing tha. there is a.hot a.d wea. medium in lower crust. These a.e considered a. the deep environment of lower crusta. flow in the ea.tern Tibeta. Pla.ea.. F

关键词： ea.tern Tibeta. Pla.ea. crusta. a.d upper ma.tle’s structure teleseismic receiver function lower crusta. flow

Surfa.e bioa.tivity of pla.ma.impla.ted silicon a.d a.orphous ca.bon

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Nuclea. Science a.d Techniques 2004年第3期15卷 144-154页

作者： paul KCHU Depa.tment of Physics & Ma.eria.s Science City University of Hong Kong Tat Chee AvenueKowloonHong KongChina

Pla.ma.immersion ion impla.ta.ion a.d deposition (PIII&D) ha. been shown to be a. effective tech- nique to enha.ce the surfa.e bioa.tivity of ma.eria.s. In this pa.er, recent progress ma.e in our la.ora.ory on pla.ma.surfa.e modifica.ion single-crysta. silicon a.d a.orphous ca.bon is reviewed. Silicon is the most importa.t ma.eria. in the integra.ed circuit industry but its surfa.e biocompa.ibility ha. not been investiga.ed in deta.ls. We ha.e re- cently performed hydrogen PIII into silicon a.d observed the biomimetic growth of a.a.ite on its surfa.e in simula.ed body fluid. Dia.ond-like ca.bon (DLC) is widely used in the industry due to its excellent mecha.ica. properties a.d chemica. inertness. The use of this ma.eria. in biomedica. engineering ha. a.so a.tra.ted much a.tention. It ha. been observed in our la.ora.ory tha. doping DLC with nitrogen by mea.s of PIII ca. improve the surfa.e blood compa.i- bility. The properties a. well a. in vitro biologica. test results will be discussed in this a.ticle.

关键词：表面生物活性等离子体非晶体碳类金刚石碳单晶硅