简介：Thecommoncoldistheworld'smostwidespreadillness,whichisaplague(疫病)thatfleshreceives.

简介：某些动词如:catch,have,get.take等与cold连用,表示感冒、伤风、着凉之意。有时cold前带a.有时不带a.有时可带可不带.为了弄清楚这些关系,现归纳如下。一、动词have,get与cold连用,要加a.表示状态.可与表示延续性时间状语连用。例如:1)Hehashad(got)acoldfordays.2)I’vegot(had)acoldsincemyarrival.二、动词take与cold连用,不加a。例如:1)Youusedtotakecold,usedn’tyou?2)XiaoLiuisn’tstrongenough.Sheeasilytakescolds三、动词catch与cold连用,a可有可无。例如:Putonyourcoat,oryou’llcatch(a)cold.

简介：Theprincipleofstripwidthmeasuringsystemwithopticalfiberlinkisdescribed,andapracticalmethodisintroduced.

简介：Coldringrollingisanadvancedbutcomplexmetalformingprocessundercoupledeffectswithmulti-factors,suchasgeometrysizesofrollsandringblank,material,formingprocessparametersandfriction,etc.Amongthesefactors,frictionbetweenrollsandringblankplaysanimportantroleinkeepingthestableformingofcoldringrolling.Ananalyticalmethodwasfirstlypresentedforproximatelydeterminingthecriticalfrictioncoefficientofstableformingandthenamethodwasproposedtodeterminethecriticalfrictioncoefficientbycombininganalyticalmethodwithnumericalsimulation.Andtheinfluenceoffrictioncoefficientonthequalityofend-planeandsidespreadofring,rollingforce,rollingmomentandmetalflowcharacteristicinthecoldringrollingprocesshavebeenexploredusingthethreedimensional(3D)numericalsimulationbasedontheelastic-plasticdynamicfiniteelementmethod(FEM)undertheABAQUSsoftwareenvironment,andtheresultsshowthatincreasingthefrictiononthecontactsurfacesbetweenrollsandringblankisusefulnotonlyforimprovingthestabilityofcoldringrollingbutalsoforimprovingthegeometryanddimensionprecisionofdeformedring.

简介：AdeuteronpossessesacoulombpotentialbarrierwithmaximumUmax≈10^6eV(atro=1.51×10^-13cm)aroundhim.Soprerequisitetodirectcollideandexcitenuclearfusionreactionfortwodeuteronsistopenetratetoallofoppositebarrier.

简介：AuthorshavestudiedthetransformationprocessesofcoldairoverlandinEastAsiaforeightcaseswhichoccurredindifferentmonthsof1981.First,thesurfaceeddysensibleandlatentheatfluxes,anddragcoefficientwereestimatedaccordingtotheapproachofsimilaritytheory.Then,theapparentheatsource,theapparentmoisturesink,andsolarandlong-waveradiativeheating(orcooling)werefurthercalculatedthroughthebudgetmethodandphysicalparameterizationalgorithm.Ithasbeenfoundthatthecoldairimmediatelystartsthetransformationprocessoverlandonceitmovesawayfromitsregionoforigin.Inwinter,thedegreeoftransformationofcoldairmassgraduallyintensi-fiedasittravelledsoutheastward;whilearrivingintheocean,thecoldairmassunderwentthemostsignificanttransfor-mationprocess.Insummer,themostvigoroustransformationofthermalandmoisturefieldswasobservedinNorthChinaandMongolianregion,withmuchgreaterintensitythanthatinwinter.

简介：AstheColdWarhaspassedintohistory,China’snationalsecurityisnowfacedwithanewinternationalenvironment,inwhichthebipolarconfrontationhasdisappearedandthedangerofanewworldwarhasfurtherreceded.China’scurrentsecuritycanbesaidinabetterconditionthanatanytimeduringtheColdWar.

简介：OnthebasisofNOAA/CPCdataofseasurfacetemperatureanomalyintheNinoregionsduringJan.1950-Dec.2003,thewaveletpowerspectrumofSSTwerestudiedwithsignificanceandconfidencetestingatdifferentscalesinthispaper.ItshowsthattheSSTareprovidedwithmulti-timescalesstructurenestedoneanother,andvaryonscalesof2-7years,8-20yearsand＞30years.Themostsignificantvariationofthewarmandcoldepisodesisinthe4-yearbandofperiod.Thepower,frequencystructureandconfidenceofthesameepisodearedifferentindifferentNinoregions.TheintensityofoscillationsisincreasingatlowfrequencybandsanddecreasingathighfrequencybandsfromeasttowestintheNinoregions,especiallyafter1970.

简介：Surface-graftedpoly(ethyleneglycol)(PEG)moleculesareknowntopreventproteinadsorptiontothesurface.NitinolsampleswerecoatedundertetraglymeECRcoldplasmaconditionstoenhanceitsbiocompatibility.ThemodifiedNitinolsurfaceswerecharacterizedbyhighresolutionESCAandcontactangle,itwasdemonstratedthatthedepositedPEG-likecoatingswerebuiltupmainlyof-CH2-CH2-O-linkagesinsurfaces.ThesurfacewettabilityofthemodifiedNitinolwasincreasedcomparedwiththecontrolsurface.HumanplasmaproteinwasadsorbedonNitinolevaluatedbySEM,theproteinadsorptiononmodifiedsurfacesdecreasedrapidly.Thus,thepotentialbenefitsofcoldplasmatechniquewillbeofusetothebiomedicalindustriesimprovingthebiocompatibilityofmetals.

简介：Followingclassicaltheory,atwo-layerfrontalmodelisdesigned.Itassumesthatfrontalsurfaceisthezero-orderdiscontinuityofdensity.Inthispaper,themodelisusedtostudyorographicallydistortedandoccludedfronts.Itisindi-catedthatthedistortionandocclusionofcoldfrontsaredifferentunderdifferentconditionsoforography.Frontalin-tensityalsoinfluencesthedistortionandocclusion.Somerulesarerevealedandcomparedwithobservations.Inaddition,wehaveanalysedtheverticalstructureofcoldfrontabovemountainsandfoundthatfrontalsurfacemaybebulgedundertheinfluenceoforographywhenitclimesthemountain.ThebulgeoffrontalsurfaceisjustliketheboreaspointedoutbyLong(1972)whenheanalysedfluidoverobstacles.

简介：

简介：RapidgrowthofChina’soverallnationalstrengthaftertheendoftheColdWarhasattractedworldwideattention.Asaconsequence,politicalscien-tistsofvariouscountriesbegintoponderoveraquestion:whetherwillChi-naseekexternalexpansionwhenitbecomespowerful?In1992,therebegantoap-pearamythofso-called"Chinathreat".InitsNovember28issueofthatyear,the

简介：Numericalanalysesofthecoldturbulentflowinmodelcombustionchambersweremadebyusingκ.εturbulentmodel.ThehybriddifferenceschemeandSNIPmethodwereemployed.Numericalsolutionsforretouchmentlengthandvelocitydistributionswereobtainedintherecirculatingzoneofthecombustionchambers.Thecalculationresultswereinfairlygoodagreementwiththereportedexperimentaldata.Theworkpresentedinthispaperwasabasicpartofthecalculationmodelofsudden-enlargedcombustionchambers.

简介：Remarkableadjustmentsinforeignpolicyhavebeenmadehythe33LatinAmericancountries,themajorinfluentialonesinparticular,sincetheadventofthe1990s.TheinperativeformakingdrasticpolicyadjustmentsoriginatesfromtheurgentneedtomeetthechallengesresultingfromtheendoftheColdWarandthetransformedworldpowerbalance.

简介：Theoscillationofmulti-timescalesandtheprocessoftransitionbetweencoldandwarmperiodsovermostpartsofChinaandits6regions(theNortheast,NorthChina,ChangjiangRiverValley,SouthChina,theSouthwest,theNorthwest)wereanalyzedwithwavelettransformationandbycomputingthevariancesofthewaveletcomponentsforthetemperaturegradeseriesduringJanuary191ItoFebruary2001,Thepredictionmodelforcoldandwarmperiodshasbeendevelopedandthetrendofcoldandwarmchangeinthecoming10yearsispredicted.Theresultsshowthattheoscillationwithperiodsofaround30-40yearswasthestrongestinthelast100yearsandthe3-yearoscillationinbothwinterandsummerwasalsostronger,especiallyinwinter.Thetransitiontimeofcoldandwarmperiodsintermsofwintermeandidnotcoincidewiththatofannualmean,butthedifferencebetweensummermeanandannualmeanisless.Theprocessesoftransitionof6regionsaresomewhatdifferent,theirmaincharacteristicsarethatthebeginningyearofsignificantwarmingfor1980sto1990swasverydifferentforthesouthernandthenorthernpartofChina.Itisfoundthatthestrongeroscillationwith3-yearperiodcausescoolinginNortheastChinainrecentseveralwinters.Theexperimentalpredictionsshowthatthemodelsusedinthepapercanprojectthemajortransitionbetweenhighandlowtemperatureperiods.

简介：Asweenterthe1990’swiththeendoftheColdWar,LatinAmericaandtheCaribbeanregionhaveundergonespectacularchangesinthecapricioustrendofevents.Asawhole,thesituationintheregionhastakenaturnforthebetter,butitschronicailmentsremain.Therearestillunpredictablefactorsonitsroadofde-velopment.

简介：Carbidesinaseriesofcold-weldingweldmetalswerestudiedbymeansofSEM,TEMandEPMA,andtheformingmechanismofcarbidewasproposedaccordingtotheirdistributionandmorphology.Duetotheirdifferentcarbide-formingtendency,NbandTicouldcombinewithCtoformparticulatecarbideinliquidweldmetalanddepletedthecarboncontentinmatrix,whileVinducedthecarbideprecipitatedalonggrainboundary.ButtoomuchNborTialoneresultedincoarsecarbideandpoorstrengthenedmatrix.WhensuitableamountofNb,TiandVcoexistedinweldmetal,bothuniformlydistributedparticulatecarbideandwellstrengthenedmatrixcouldbeachieved.Itwasproposedthatthecarbidenucleatedontheoxidewhichdispersedinliquidweldmetal,andthengrewintomulti-layercomplexcarbideparticlesbyepitaxialgrowth.Atdifferentsites,carbideparticlesmaypresentasdifferentmorphologies.

简介：Theclosed-diedcoldforgingtechnologyofthebevelgearsusedinJadacarwasinvestigated.Withtheanalysisofthestrainfieldandvelocityfieldoftheplasticdeformationandtheenduredforcesofthedies,thefillingrulesforthemetalwereanalyzedbytheelastic-plasticfiniteelementmethod(FEM).Theresultsshowthatthereisagreatdifferenceamongclosed-diecoldforging,extrusionandforging,asfarasthemetalflowingisconcerned.Theouteraddendumcannotbefilledcompletelyintheclosed-diecoldforgingofthebevelgears,andtheroundanglewillbeformed.Butitdoesnotinfluencetheapplicationofthebevelgears.Atthebeginning,therigidareaisformedinthecavityofthelowerdie.Andthenitwillmoveupwardstosupplythemetalforthegearfilling.Fortheclosed-diecoldforgingofthebevelgears,theforceactingontheupperdieandthelowerdieissignificantlydifferent.

简介：我们在场在高度反响的媒介的极端慢的明亮、黑暗的光solitons的形成上的系统的研究。由调查，四一生拓宽了原子系统，即，三状态的A类型和串联类型计划，和四状态的N类型和cascade-typeschemes，我们证明在冷原子系统的如此的极端慢的soh'tons的形成是相当通用的现象。

简介：WestatisticallyanalyzethetropicaltyphoonformingintheSouthChinaSeaanduseTC(TropicalCyclone)forshortinthefollowing)bytyphoonyearbook.Thetyphoonquantityisverydifferentindifferentmonthsandyears.TCappearsinallmonthsexceptMarch,andthemostTCquantityinayearis11,theleastis1and6.2onaverage.ThemostTCquantityinamonthis5andtheleastis0.TClandsmostinAugustandnoTClandsonChinesecontinentfromDecembertothefollowingApril.TheprimarylandingareaisbetweenShantouandHainanIsland.ThesustainingperiodofTCisusuallybetween4daysto7days,andthelongestis19days.Only15%oftheTCformingintheSouthChinaSeacanintensifytotyphoon,andtheyallformintheoceanareadeeperthan150m.TheSouthChinaSeaistheoceanareaoverwhichtheTCoccursfrequently.