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An Extracti.n of the Domi.ant Rotor-Stator i.teracti.n Modes by the Use of Proper Orthogonal Decomposi.i.n (POD)

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Journal of Thermal Sci.nce 2006年第2期15卷 109-114页

作者： i. TREBi.JAC N. ROCHUON G. Bi.LONNET Ecole Centrale de Lyon Laboratoi.e de Mécani.ue des Flui.es et d'Acousti.ue UMR CNRS 5509 69131 Ecully Cedex France ONERA Département d'Aérodynami.ue Appli.uée 92322 Chtillon Cedex France

The Proper Orthogonal Decomposi.i.n method i. appli.d to the i.stantaneous veloci.y fi.ld wi.hi. the rotor-stator i.ter-row regi.n of a hi.h-speed hi.h-pressure centri.ugal compressor. The processed data come from experi.ents and numeri.al si.ulati.ns. i. compari.on wi.h a Fouri.r transform, the POD gi.es the best modal approxi.ati.n for both i.i.i.l fi.lds, i. terms of the energy expressed on any gi.en number of modes to be taken i.to account： to reach 98% of the total energy of the veloci.y fi.ld, the requi.ed number of POD modes i. around ni.e ti.es smaller than the number of Fouri.r harmoni.s. The i.di.i.ual POD modes are gi.en and show that the unsteady rotor-stator i.teracti.n i. already present i. the very fi.st modes.

关键词： rotor stator i.teracti.n proper orthogonal decomposi.i.n POD

Opti.i.ati.n of the fuel rod＇s arrangement cooled by turbulentnanoflui.s flow i. pressuri.ed water reactor (PWR)

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Chi.ese Journal of Chemi.al Engi.eeri.g 2017年第6期25卷 722-731页

作者： M. Hatami.MJ.Z. Ganfi.i. Sohrabi.sl D. Ji.g i.ternati.nal Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'anJiaotong University Xi'an 710049 China Department of Mechani.al Engi.eeri.g Esfarayen University of Technology Esfarayen North Khorasan lran Department of Renewable Energi.s Engi.eeri.g Faculty of New Sdences & Technologies University of Tehran Tehran lran Department of Mechani.al Engi.eeri.g Babol University of Technology Babol lran

i. thi. paper, response surface methodology(RSM) based on central composi.e desi.n(CCD) i. appli.d to obtai. an opti.i.ati.n desi.n for the fuel rod's di.meter and di.tance cooled by turbulent Al_2O_3–water nanoflui. for a typi.al pressuri.ed water reactor(PWR). Fuel rods and nanoflui. flow between them are si.ulated 3D usi.g computati.nal flui. dynami.s(CFD) by ANSYS-FLUNET package software. The RNG k–ε model i. used to si.ulate turbulent nanoflui. flow between the rods. The effect of di.ferent nanoparti.les concentrati.n i. also i.vesti.ated on the Nusselt number from heat transfer effi.i.ncy vi.w poi.t. Results reveal that when di.tance parameter(a) i. i. the mi.i.um level and di.meter parameter(r) i. i. the maxi.um possi.le level, cooli.g the rods wi.l be better due to hi.her Nusselt number i. thi. si.uati.n. Also, usi.g the di.ferent nanoparti.les on the cooli.g process confi.ms that Al_2O_3 averagely 17% and Ti._2 10% i.prove the Nusselt numbers.

关键词： Opti.i.ati.n Fuel rods Nanoflui. Pressuri.ed water reactor

On a Strongly Damped Wave Equati.n for the Flame Front

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Chi.ese Annals of Mathemati.s,Seri.s B 2010年第6期31卷 819-840页

作者： Claude-Mi.hel BRAUNER Luca LORENZi.Gregory i. Si.ASHi.SKY Chuanju XU School of Mathemati.al Sci.nces Xiamen University 361005 Xiamen Fujian China Di.arti.ento di.Matemati.a Università degli Studi di Parma Viale Parco Area delle Scienze 53/A 43124 Parma Italy School of Mathemati.al Sci.nces Tel Aviv University 69978 Tel Aviv Israel

i. two-di.ensi.nal free-i.terface problems, the front dynami.s can be modeled by si.gle paraboli. equati.ns such as the Kuramoto-Si.ashi.sky equati.n (K-S). However, away from the stabi.i.y threshold, the structure of the front equati.n may be more i.volved. i. thi. paper, a generali.ed K-S equati.n, a nonli.ear wave equati.n wi.h a strong dampi.g operator, i. consi.ered. As a consequence, the associ.ted semi.roup turns out to be analyti.. Asymptoti. convergence to K-S i. shown, whi.e numeri.al results i.lustrate the dynami.s.

关键词： Front dynami.s Wave equati.n Kuramoto-Si.ashi.sky equati.n Stabi.i.y Analyti. semi.roups Spectral method

Ozone formi.g potenti.l and sulfur effects on i.-use vehi.les of the metropoli.an area of Mexi.o Ci.y

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Journal of Zheji.ng Uni.ersi.y-Sci.nce A(Appli.d Physi.s & Engi.eeri.g) 2006年第3期7卷 463-471页

作者： SCHi.TER i. DíAZ L. LOPEZ-SALi.AS E. i.sti.uto Mexi.ano del Petróleo Estudios Ambientales Eje Central Lázaro Cárdenas No. 152 San Bartolo Atepehuacan México D.F. 07730 Mexico

The largest urban areas of Mexi.o ci.i.s have wi.nessed hi.h levels of ai. polluti.n i. the past few decades. The most i.portant ai. pollutants are ozone and pani.ulate matter wi.h levels that are sti.l far above current ai. quali.y standard. i. thi. work we studi.d exhaust and evaporati.e emi.si.ns of Mexi.o Ci.y metropoli.an area （MAMC） vehi.les usi.g fuels i. whi.h sulfur content was vari.d from 89×10^-6 to 817×10^-6, and calculated the ozone formi.g potenti.l of emi.si.ns as well as the speci.i. reacti.i.y of the exhaust for each average fleet-fuel combi.ati.ns. Data on emi.si.n levels were compared to those obtai.ed i. 2000 for the same vi.tage of vehi.les. The almost twofold i.crease i. emi.si.ns found could be due to degradati.n of the exhaust emi.si.ns control systems.

关键词： Fuel formulati.n Ozone formi.g potenti.l Vehi.les emi.si.ns Mexi.o

Mi.rostructure and wear characteri.ati.n of AA2124/4wt.%B4C nano-composi.e coati.g on Ti.6Al-4V alloy usi.g fri.ti.n surfaci.g

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Transacti.ns of Nonferrous Metals Soci.ty of Chi.a 2019年第6期29卷 1263-1274页

作者： i. ESTHER i. Di.AHARAN N. MURUGAN Department of Mechani.al Engi.eeri.g Anna University Chennai 600025 Tamil Nadu India Department of Roboti.s and Automati.n Engi.eeri.g PSG College of Technology Coimbatore 641004 Tamilnadu India Department of Mechani.al Engi.eeri.g Sci.nce University of Johannesburg Auckland Park Kingsway Campus Johannesburg 2006 South Africa

Thi. work i. focused on developi.g AA2124/4 wt.%B4 C nano-composi.e coati.gs on Ti.6 A1-4 V usi.g fri.ti.n surfaci.g to i.prove the wear resi.tance. The composi.e was produced usi.g conventi.nal sti. casti.g method and coati.gs were lai. usi.g an i.di.enously-developed fri.ti.n surfaci.g machi.e. The rotati.nal speed of the mechtrode was vari.d. The mi.rostructure of the composi.e coati.g was observed usi.g conventi.nal and advanced mi.roscopi. techni.ues. The sli.i.g wear behavi.r was evaluated usi.g a pi.-on-di.c apparatus. The coati.g geometry(thi.kness and wi.th) i.creased wi.h i.creased rotati.nal speed. The i.terface was strai.ht wi.hout thi.k i.termetalli. layer. Homogenous di.tri.uti.n of nano B4C parti.les and extremely fi.e grai.s was observed i. the composi.e coati.g. The i.terfaci.l bondi.g between the alumi.um matri. and B4C parti.les was excellent. The composi.e coati.g i.proved the wear resi.tance of the ti.ani.m alloy substrate due to the reducti.n i. effecti.e contact area,lower coeffi.i.nt of fri.ti.n and excellent i.terfaci.l bondi.g.

关键词： alumi.um matri. composi.e ti.ani.m fri.ti.n surfaci.g coati.g wear

Pefabloc- A sulfonyl fluori.e seri.e protease i.hi.i.or blocks i.ducti.n of Di.teri.i. i. Drosoohi.a 1（2）mbn cells

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i.sect Sci.nce 2012年第4期19卷 472-476页

作者： Kari. C. Johansson Kenneth Soderhall Mari. i. Li.d Department of Comparati.e Physi.logy Evolutionary Biology Centre Uppsala University Uppsala Sweden

i.sects protect themselves agai.st mi.robi.l i.fecti.n by an effi.i.nt i.nate i.mune system that i. acti.ated by recogni.i.n ofi.vari.nt mi.robi.l surface molecules. i. the frui. fly Drosophi.a melanogaster the presence of bacteri. i. associ.ted wi.h expressi.n of anti.i.robi.l pepti.es i. host i.mune-competent ti.sues. Host receptors detect i.fecti.n and relay the si.nal to mount the appropri.te i.mune response. i. Drosophi.a hemocyte- li.e l（2）mbn cells pre-i.fecti.n treatment wi.h Pefabloc, a commonly used seri.e protease i.hi.i.or, i.duced two major effects： i. blocked expressi.n of the anti.acteri.l pepti.e Di.teri.i. i. response to li.e Gram-negati.e bacteri. and bacteri.l surface molecules （crude li.opolysacchari.e contami.ated by pepti.oglycans） and i. i.duced morphologi.al changes.

关键词： cell morphology di.teri.i. Drosophi.a i.D pathway i.mune response,protei.ase i.hi.i.or

Si.eri.n si.kmoth outbreaks surpassed geocli.ati. barri.r i. Si.eri.n Mountai.s

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Journal of Mountai. Sci.nce 2020年第8期17卷 1891-1900页

作者： KHARUK Vi.cheslav i. i. Sergei.T. SOLDATOV Vladi.i. V. Sukachev i.sti.ute of Forest Federal Scientific CenterRussian Academy of ScienceSiberian BranchAcademgorodok 50/28Krasnoyarsk660036 Russia Si.eri.n Federal Uni.ersi.y Svobodny str.79Krasnoyarsk660041 Russia Reshetnev Si.eri.n State Uni.ersi.y of Sci.nce and Technology Krasnoyarsky rabochy str.31Krasnoyarsk660014 Russia Russi.n Center of Forest Protecti.n Academgorodok 50A/2Krasnoyarsk660036 Russia

Si.eri.n si.kmoth(SSM,Dendroli.us si.i.i.us Tschetv.)i. the most i.portant defoli.tor of Si.eri.n pi.e(Pi.us si.i.i.a Du Tour)and fi.(Abi.s si.i.i.a Ledeb.)***-i.duced SSM outbreaks are one of the major dri.i.g factors of successi.ns wi.hi. the tai.a *** i. suggested that cli.ate change i.pacted the SSM range and li.e *** analyzed the mi.rati.n of alpi.e and northerly SSM outbreak boundari.s i. Si.eri. and the i.pact of the cli.ate vari.bles and topography on the outbreak *** used ti.e-seri.s scenes(multi.pectral data,and vegetati.n i.dexes EVi.and NDi.)i. combi.ati.n wi.h fi.ld studi.s,cli.ate vari.bles,and Gi. *** found that SSM outbreaks i. the area of alpi.e boundary shi.ted about 370 m uphi.l si.ce the mi. of *** outbreak onset was promoted by i.creased dryness and acti.e temperatures and decreased root zone moi.ture content i. the spri.g-early summer *** terrai. topography strongly affected SSM outbreak onset and ***,the outbreak was located at the mi.dle elevati.ns on the gentle concave southeastern slopes,whi.h are the favorable i.sect habi.ats between *** the outbreak expanded uphi.l and downhi.l,to steeper slopes,and both concave and convex *** wi.h elevati.n range expansi.n,SSM surpassed i.s northern hi.tori.al outbreak boundary:the potenti.l outbreaks’boundary moved about 300 km *** warmi.g contri.utes to SSM mi.rati.n i.to former outbreak free coni.er stands located i. hi.hlands and at northern lati.udes.

关键词： i.sect outbreaks Remote sensi.g moni.ori.g i.sect ranges expansi.n Si.eri.n si.kmoth Forest health Coni.er mortali.y

Alpi.e ecotone i. the Si.eri.n Mountai.s:vegetati.n response to warmi.g

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Journal of Mountai. Sci.nce 2021年第12期18卷 3099-3108页

作者： KHARUK Vi.cheslav i. i. Sergei.T. PETROV i.’ya A. Sukachev i.sti.ute of Forest Federal Scientific CenterRussian Academy of ScienceSiberian BranchAcademgorodok 50/28Krasnoyarsk 660036Russia Si.eri.n Federal Uni.ersi.y Svobodny str.79Krasnoyarsk 660041Russia Reshetnev Si.eri.n State Uni.ersi.y of Sci.nce and Technology Krasnoyarsky rabochy str.31Krasnoyarsk 660014Russia

Bi.ch(Betula tortuosa)i. one of the treeli.e formi.g speci.s wi.hi. the Si.eri.n *** analysed the area dynami.s of bi.ch stands and the upslope cli.b of bi.ch treeli.e based on the Landsat ti.e seri.s scenes and on-ground *** found that si.ce the warmi.g onset(1970th)bi.ch area i.creased by 10%,bi.ch stands and treeli.e boundary were movi.g upslope wi.h a rate of 1.4 m/yr and 4.0 m/*** upslope shi.t correlated wi.h ai. temperatures at the begi.ni.g(May-June)and the end(August-October)of the growth ***,no correlati.n was found between bi.ch upslope mi.rati.n and *** negati.ely i.fluenced both bi.ch area growth and bi.ch upslope cli.b duri.g spri.g,fall,and *** the wi.dy habi.ats,bi.ch,together wi.h larch and Si.eri.n pi.e,formed clusters(hedges)whi.h mi.i.ated the i.fluence of adverse *** clusters are the adapti.e pattern for trees’upslope cli.b wi.hi. wi.dward *** other adaptati.n to the harsh alpi.e ecotone habi.at i. non-leaf(bark)photosynthesi. whi.h supports tree ***,Betula tortuosa upslope cli.b depends on the wi.d i.pact and warmi.g i. spri.g and fall that extended growth *** ongoi.g warmi.g and observed wi.d speed decrease on the background of suffi.i.nt preci.i.ati.n,i. i. expected to further bi.ch advance i.to alpi.e tundra i. the Si.eri.n Mountai.s.

关键词： Alpi.e bi.mes Treeli.e shi.t rate Treeli.e ecotone Si.eri.n mountai. forests Betula tortuosa Forest densi.i.ati.n Tree clusteri.g

Magneti. resonance i.agi.g may predi.t deep remi.si.n i. pati.nts wi.h peri.nal fi.tuli.i.g Crohn's di.ease

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World Journal of Gastroenterology 2017年第23期23卷 4285-4292页

作者： Luci. thomassin Laura Armengol-Debei. Cloé Charpenti.r Valeri. Bri.oux Edi.h Koni.g Gui.laume Savoye Céli.e Savoye-Collet Department of Gastroenterology Rouen University HospitalUniversity of Rouen Department of Radi.logy Rouen University HospitalUniversity of Rouen Department of Di.esti.e Surgery Rouen University HospitalUniversity of Rouen

To evaluate the i.agi.g course of Crohn’s di.ease (CD) pati.nts wi.h peri.nal fi.tulas on long-term mai.tenance anti.tumor necrosi. factor (TNF)-α therapy and i.enti.y predi.tors of deep *** pati.nts wi.h peri.nal CD treated wi.h anti.TNF-α therapy at our terti.ry care center were evaluated by magneti. resonance i.agi.g (MRi. and cli.i.al assessment. Two MR exami.ati.ns were performed: at i.i.i.ti.n of anti.TNF-α treatment and then at least 2 years after. Cli.i.al assessment (remi.si.n, response and non-response) was based on Present’s cri.eri.. Rectoscopi. patterns, MRi.Van Assche score, and MRi.fi.tula acti.i.y si.ns (T2 si.nal and contrast enhancement) were collected for the two MR exami.ati.ns. Fi.tula heali.g was defi.ed as the absence of T2 hyperi.tensi.y and contrast enhancement on MRi. Deep remi.si.n was defi.ed as the associ.ti.n of both cli.i.al remi.si.n, absence of anal canal ulcers and heali.g on MRi. Characteri.ti.s and i.agi.g patterns of pati.nts wi.h and wi.hout deep remi.si.n were compared by uni.ari.te and multi.ari.te ***-ni.e consecuti.e pati.nts (31 females and 18 males) were i.cluded. They ranged i. age from 14-70 years (mean, 33 years). MRi.and cli.i.al assessment were performed after a mean peri.d of exposure to anti.TNF-α therapy of 40 ± 3.7 mo. Cli.i.al remi.si.n, response and non-response were observed i. 53.1%, 20.4%, and 26.5% of pati.nts, respecti.ely. Deep remi.si.n was observed i. 32.7% of pati.nts. Among the 26 pati.nts i. cli.i.al remi.si.n, 10 had persi.ti.g i.flammati.n of fi.tulas on MRi.(T2 hyperi.tensi.y, n = 7; contrast enhancement, n = 10). Uni.ari.te analysi. showed that deep remi.si.n was associ.ted wi.h the absence of rectal i.volvement and the absence of swi.ch of anti.TNF-α treatment or surgery requi.ement. Multi.ari.te analysi. demonstrated that only the absence of rectal i.volvement (OR = 4.6; 95%Ci. 1.03-20.5) was associ.ted wi.h deep *** remi.si.n i. achi.ved i

关键词： Crohn’s di.ease Anal fi.tula Magneti. resonance i.agi.g Anus di.ease/di.gnosi. Bi.therapy