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14 个结果
  • 简介:Puttingforwardbillsandproposalsistherightofpeople’sdeputiesendowedbylawandtheConstitutionandoneoftheimportantwaysforthemtoparticipateinthemanagementofstateaffairsonbehalfofthepeople.Itisalsooneofthemajorchannelstovoicethepopularfeelingsandwills.Withthedeepeningofdemocracyandlegalconstructioninrecentyears,people’sdeputieshavebecomemoreconsciousofparticipatinginstatemanage-

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  • 简介:Thisarticlereviewsthebackgroundandproblemsintheteachingofintensivereading(IR)tothestudentswithnon-EnglishmajorsandproposessomeactivitiesforimprovingtheteachingandlearningprocessoftheIRclassroom.Itisexpectedthatwithsomeapplicableandeffectiveactivities,theteachercanhelpstudentsreadactivelyandgrowintoeffectiveandindependentreaders.

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  • 简介:Differentfrombirdsandinsects,batshavecomplexwing-deformationcapacitytogeneratehighaerodynamicforces.Inflight,theactivelymorphingofbatwingincludesthetwistingfromwingroottowingtip,thecamberingalongthechordwisedirection,thebendingalongthespanwisedirectionandthewingarea-changingcausedbythestretchandretractionofthewingspan.Itwasfoundthatthehighthrustandliftrequiredinbatflightaredependentonthewingtwistingandcamberingrespectively.Moreover,theintegratedwing-morphinggeneratestheaerodynamicliftandthrustmainlyduringthedownstrokeandalmostnegligibleforcesduringtheupstroke.Thewingarea-changingandbendingcanbeusedtoamplifythepositiveforcesinthedownstrokedurationandreducethenegativeforcesintheupstrokeduration.

  • 标签: 空气动力学 变形能力 蝙蝠 学习 持续时间 机翼
  • 简介:1.ApplicationProcedureof2010WorldFairOnMay2,2001,China,thefirstcountry,submittedformallyanapplicationforholding2010ShanghaiWorldFairtotheBureauofInternationalExhibition(BIE).TherewereChina,Russia,ROK,Poland,MexicoandArgentina(AfterwardsArgentinaWithdrew)formallysubmittingapplications.Thedeadlineforapplicationissixmonthsaftertheapplicationwasformallysubmittedbythefirstcountry.ThenBIEsentinvestigationdelegationtoinvestigatevariouscountriesthatmadeapplications,andsubmittedreportstotheExecutiveCommissionandGeneralAssembly.ChinastatedreportsatBIE129th,130thand131stGeneralAssembliesinJuneandNovember2001andJuly2002respectively.InDecember2002,ChinastatedthelastreportatBIE132ndGeneralAssembly.

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  • 简介:TheSouthwestUniversityofPoliticalScienceandLawisoneoftheearliesthigher-learninginstitutionsthatconductedhumanrightseducationandresearch,withalonghistoryandrichexperienceinhumanrightseducationandresearchandagreatnumberofprofessionals.Aftermanyyears’efforts,theHumanRightsEducationandResearchCenterattheuniversityhascultivatedanexcellentacademicteam,consistingoffour

  • 标签: 人权 法治建设 保障 法律 服务 马克思主义
  • 简介:Eitherfromtheperspectiveofthefinitesupplycapacityofglobalresourcesandenergy,orfromtheperspectiveofglobalenvironmentrestrictiveconditions,developingcountriescannotrepeattheolddevelopmentroadofdevelopedcountries,eitherinviewoftheinternationalpressureChinaiscurrentlyfacing,orinviewofChina'sownresourcesendowmentandstagesofdevelopment,wemustactivelyfacesuchachallengeofclimatechange.Wemustrecognizethattheissueofclimatechangemaybeagreatrestrainttothepresentandfutureeco-socialdevelopment,andmayalsobeanimportantdrivingforceandnewopportunitytopushforwardthetransformationofdevelopmentpattern,totakeanewroadofindustrializationandtorealizesustainabledevelopment.Thisdemandsus,ontheonehand,totaketheScientificOutlookofDevelopmentastheguidetomakeeffortstocontroltheemissionofgreenhousegasesandcontinuouslyincreasethecapabilityofadaptingtoclimaticchange,andsetuptheoverallplantorespondtoclimatechangeofourcountry,andontheotherhand,weshouldunswervinglytaketheroadofsustainabledevelopment,saveenergy,optimizeenergystructureandstrengthenbiologicalprotectioninslowingandadaptingtoclimatechange.

  • 标签: 可持续发展能力 气候变化 可持续发展道路 发展中国家 经济社会发展 温室气体排放
  • 简介:Wesystematicallyinvestigatedthetunabledynamiccharacteristicsofabroadbandsurfaceplasmonpolariton(SPP)waveonasilicon-gradedgratingstructureintherangeof10–40THzwiththeaidofsingle-layergraphene.ThetheoreticalandnumericalsimulatedresultsdemonstratethattheSPPsatdifferentfrequencieswithinabroadbandrangecanbetrappedatdifferentpositionsonthegraphenesurface,whichcanbeusedasabroadbandspectrometerandopticalswitch.Meanwhile,thegroupvelocityoftheSPPscanbemodulatedtobeseveralhundredtimessmallerthanlightvelocityinvacuum.Basedonthetheoreticalanalyses,wehavepredictedthetrappingpositionsandcorrespondinggroupvelocitiesoftheSPPwaveswithdifferentfrequencies.Byappropriatelytuningthegatevoltages,thetrappedSPPwavescanbereleasedtopropagatealongthesurfaceofgrapheneoroutofthegradedgratingzone.Thus,wehavealsoinvestigatedtheswitchingcharacteristicsoftheslowlightsystem,wheretheopticalswitchingcanbecontrolledasan'off'or'on'modebyactivelyadjustingthegatevoltage.Theslowlightsystemoffersadvantages,includingbroadbandoperation,ultracompactfootprint,andtunableabilitysimultaneously,whichholdsgreatpromiseforapplicationsinopticalswitches.

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  • 简介:Thesupercontinuum(SC)generationattherepetitionrateof10GHzispresented.TheSCisgeneratedina4.2kmconventionaldispersion-shiftedfiber(DSF),whichisproducedwithnonlineareffectsandgroupvelocitydispersion.TheDSFispumpedbyanactivelymode-lockedEr3+-dopedfiberlaserwithpulsewidthof7.97ps.AnovelSCpulsesourcewithabandwidthupto125nmisobtained,whichcoversthewholeC,LbandsandpartofSband.Thestable,narrowpulseswithmeanpulse-widthof9.7psandtime-bandwidthproductof0.48arefilteredoutacrossthewholeSCbandwidth.Thissupercontinuumpulsesourceissuitableforfuturehigh-speedopticalcommunications.

  • 标签: 超连续光谱 锁模光纤激光器 分散位移光纤 光泵
  • 简介:TimedomainABCDmatrixformalismisausefulmodelforanalyzingthecharacteristicsofactivelymodelockedfiberlaser.Basedonthismodelandgivenmoreconsiderationontheinfluencesofopticalfiberdispersionandopticalfibernonlinearity,thelasercharacteristicofactivelymodelockedfiberlaserisanalyzed,andthecomparisionofthetheoreticalanalysisresultswithexperimentalonesisgiven.

  • 标签: 光纤传播 非线性 激光器 锁模光纤
  • 简介:Awavelengthtunable,highrepetitionratemode-lockedfiberringlaserwasdemonstrated.Intheexperiment,photoniccrystalfiber(PCF)isusedasanintracavitycompressionmedium.ThehighnonlinearityandanomalousdispersionofPCFcancauseintracavitycompressionandresultinsignificantreductioninthepulsewidth.Thepulsesdurationattherepetitionrateof9.99GHzwaslessthan10psovertherangeof1532-1565nm.

  • 标签: 模式锁定光纤环激光器 光子晶体纤维 PCF 脉冲宽度
  • 简介:修改multiwavelength活跃地锁模式的纤维戒指激光被建议并且试验性地示威了。在这种激光,放射激光的稳定的multiwavelengths被把串联取样的纤维布拉格栅栏(SFBG)集成到激光洞完成。实现活跃地锁模式的技术,一种双戒指洞配置被用来保证为放射激光的所有波长的洞长度是相同的。因此,同时的模式锁住所有波长被使用一样的锁模式的信号成功地完成了。

  • 标签: 布拉格光栅 光纤激光器 锁定模式 多波长