简介:Thisarticlereviewsthebackgroundandproblemsintheteachingofintensivereading(IR)tothestudentswithnon-EnglishmajorsandproposessomeactivitiesforimprovingtheteachingandlearningprocessoftheIRclassroom.Itisexpectedthatwithsomeapplicableandeffectiveactivities,theteachercanhelpstudentsreadactivelyandgrowintoeffectiveandindependentreaders.
简介:INTRODUCTIONThedisease,damageorlossoftissueandorgancanseriouslyaffectthehumanlife,evenleadstomaimedordeath,thatitshouldnotbeignored.Todate,autograftsandallograftstransplantationarethemostusuallyusedmethodstorepairdefectsoftissuesandorgans.
简介:Communityforestryisaforestryactivitywithlocalfarmersasthemainbody,andincreasinglocalfarmers’economicreturnsandimprovingcommunityecologicalenvironmentaspurposes.Itsbasicdifferencewithforestryactivitywithgovernmentofficialsasthemainbodyandmodernengineeringtechnologyasmeansandecological-environmentbene
简介:Usingsteppatternmatchtechnologywithvariationalresolutioncanrecognizethepositionandorientationoftheweldseamintheimage.Accordingtousingtheimagesegmentationmethodbasedonpatternmatch,notonlyadvancedthespeedandanti-jammingcapability,butalsocapturedtheedgeinformationoftheweldseamandtheedgeoftheworkpiece,andtheimagecoordinateoftheinitialweldingpositioncanbeobtained.Thematrixforhand-eyerelationshipoftherobotcanbecalculatedbyadoptingtherapidcalculationmethod.Accordingtothedepthcalculatingprinciplewiththespecialpointmatchingusingbinocularstereovision,theinitialweldingpositioncanbeconfirmedbycalculatingthemiddlepointoftheperpendicularlineoftworadialsinthespace,andthefunctiontoguidetheweldingrobottotheinitialweldingpositioncanberealized.
简介:Thereportofthe19thCommunistPartyofChinaNationalCongressisadocumentwithanimportanthistoricalpositionanduniquehistoriccontributioninthehistoryofthePeople’sRepublicofChinaandthegreatrejuvenationoftheChinesenation.Thereportcanberoughlydividedintotwoparts:generalprinciplesandsubstantialcontent.Thegeneralprinciplescomprisefourissues,whicharejudgmentof
简介:DuringtheconstructionoftheguidingdikeintheYangtzeEstuary,someofthecaissonstructuressankintothesoilfor1~5morslidabout20mawayfromtheoriginalplacewhenastrongstormattackedthisarea.Dynamictriaxialtestswerecarriedouttosimulatethebehavioroffoundationsoilsunderwaveloading.Thetestresultsshowthattheexcessivesettlementandlateralmovementofthecaissonsareduetotheweakeningofthesoftclaystrengthduringthestrongstorm.Thetestresultsalsoshowthattheabilityofthesoftclaytoresistthewaveforcewillbegreatlyincreasedwhenthesoftsoilsamplesaresuitablyimproved.Basedonthetestresults,animprovementmethodcombiningverticaldrainswithsurchargeloadingwasproposedtostrengthenthefoundationsoil.Ontheimprovedsoilfoundation,thedikehasbeenreconstructedandundergoneseveralstrongstormswithoutanydamage.Afiniteelementapproachhasbeendevelopedforanalyzingthesettlementandstabilityofthedikeundertheactionofstrongstorm.
简介:Inthisreport,wepresentasimulatedresultontheion-massindependenceoftheguidedtransmission,whichisinagreementwiththepreviousexperimentalresults[1].Inordertosearchtheinuenceoftheionmassonguidedtransmission,variousspeciesofionsusedasprojectilesinsimulations.Fig.1showsthetransmissionfractionsforNe7+,Ar7+,Kr7+,andXe7+ions.Thesedatawereacquiredfortiltangleof2inenergyof7keV.Itisseenthatallofionfractionsgraduallyrisesafteratimedelay,andnallyreachstable.
简介:Wereportonasystematicexperimentalstudyonthefluorescencespectraproducedfromafemtosecondlaserfilamentinairunderahighelectricfield.Theelectricfieldalonewasstrongenoughtocreatecoronadischarge(CD).Fluorescencespectrafromneutralandionicairmoleculesweremeasuredandcomparedwithpurehigh-voltageCDandpurelaserfilamentation(FIL).Amongthem,highelectricfieldassistedlaserFILproducednitrogenfluorescencemoreefficientlythaneitherpureCDorpureFILprocesses.Thenonlinearenhancementoffluorescencefromtheinteractionofthelaserfilamentandcoronadischargingelectricfieldresultedinamoreefficientionizationalongthelaserfilamentzone,whichwasconfirmedbythespectroscopicmeasurementofbothionization-inducedfluorescenceandplasma-scattered800nmlaserpulses.Thisisbelievedtobethekeyprecursorprocessforfilament-guideddischarge.
简介:Withtheincreasingnumberoflaserbeams,themaindifficultyinarrangingbeamguidingsystems(BGSs)involvesdeterminingthecorrespondingrelationshipsbetweentheoutputandinputportstorealizetheidentifiedlightpathlengthofallbeams.Giventhebasicconstraintsofgeometricarrangement,aBGSmodelisestablished,andabase-linealgorithmisproposedtoaddressthedifficultymentionedabove.Boundaryconditionsoftargetareaandtargetchamberarediscussedtoincreasethenumberoflaserbeams,andamaximumvalueexistsforaspecifictargetarea.Finally,thecompatibilityofacylindricalhohlraumtargetchamberwithasphericalhohlraumisanalyzed,andamoveablefinalopticsassemblyisproposedtoexecutetheswitchbetweenthetwodifferenttargets.
简介:加在对待腰部的圆盘形成疝(LDH)刺破的指导qi由顶点区别观察acupoint选择的功效。