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2019-10-14 19:46 来源:秦皇岛

  北京大兴试行免费提供课后延时服务 不教新知识

  FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)FirefightingauthoritiesinChangchunCity,NortheastChina’sJ,assistedbysearchdogsandadvanceddevices,testedtheirknowledgeandskillsinquakeemergencyresponsesthroughdifferentscenarios,suchasremovingbuildingdebriswithmachines.(Photo:ChinaNewsService/MaXuewen)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/MaoJianjun)Dancersperformduringalightshowandfireworksdisplayheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/MaoJianjun)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/DuYang)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/DuYang)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/ShengJiapeng)Dancersperformduringalightshowandfireworksdisplayheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/MaoJianjun)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/ShengJiapeng)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/ShengJiapeng)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/DuYang)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/ZhangYong)Alightshowandfireworksdisplayisheldtowelcomeguestsattendingthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,ShandongProvince,June9,2018.(Photo:ChinaNewsService/ZhangYong)

AcollectionofvintagevehiclesisondisplayattheOldVehiclesCulturalMuseuminTaiyuanCity,ShanxiProvince,June7,,motorcycles,andtractorsfrommorethantencountries,with90percentofthemstillabletostart.(Photo:ChinaNewsService/WuJunjie)AcollectionofvintagevehiclesisondisplayattheOldVehiclesCulturalMuseuminTaiyuanCity,ShanxiProvince,June7,,motorcycles,andtractorsfrommorethantencountries,with90percentofthemstillabletostart.(Photo:ChinaNewsService/WuJunjie)AcollectionofvintagevehiclesisondisplayattheOldVehiclesCulturalMuseuminTaiyuanCity,ShanxiProvince,June7,,motorcycles,andtractorsfrommorethantencountries,with90percentofthemstillabletostart.(Photo:ChinaNewsService/WuJunjie)AcollectionofvintagevehiclesisondisplayattheOldVehiclesCulturalMuseuminTaiyuanCity,ShanxiProvince,June7,,motorcycles,andtractorsfrommorethantencountries,with90percentofthemstillabletostart.(Photo:ChinaNewsService/WuJunjie)AcollectionofvintagevehiclesisondisplayattheOldVehiclesCulturalMuseuminTaiyuanCity,ShanxiProvince,June7,,motorcycles,andtractorsfrommorethantencountries,with90percentofthemstillabletostart.(Photo:ChinaNewsService/WuJunjie)AnaerialviewofacolorfulsaltlakeinYuncheng,ShanxiProvince,June6,,thesaltlake,knownasChinas"DeadSea",displaysdifferentcolorsasaresultofmicroorganismsinthewater.(Photo/IC)AnaerialviewofacolorfulsaltlakeinYuncheng,ShanxiProvince,June6,,thesaltlake,knownasChinas"DeadSea",displaysdifferentcolorsasaresultofmicroorganismsinthewater.(Photo/IC)AnaerialviewofacolorfulsaltlakeinYuncheng,ShanxiProvince,June6,,thesaltlake,knownasChinas"DeadSea",displaysdifferentcolorsasaresultofmicroorganismsinthewater.(Photo/IC)

  FormerprofessionalfootballstarDavidBeckhamplayscuju,knownastheoriginofmodernfootball,attheBengbuAncientBuildingsExpoParkaheadofthe2018G-EXPOGlobalTopSummitinBengbuCity,EastChina’sAnhuiProvince,June6,2018.(Photo:ChinaNewsService/ZhongXin)FormerprofessionalfootballstarDavidBeckhamplayscuju,knownastheoriginofmodernfootball,attheBengbuAncientBuildingsExpoParkaheadofthe2018G-EXPOGlobalTopSummitinBengbuCity,EastChina’sAnhuiProvince,June6,2018.(Photo:ChinaNewsService/ZhongXin)FrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)EgyptiannationalsoccerteamplayerandLiverpoolsstarstrikerMohammedSalaharriveswiththeEgyptnationalsoccerteamatanairportoutsideGrozny,Russia,June10,day.(Photo/Osports)EgyptiannationalsoccerteamplayerandLiverpoolsstarstrikerMohammedSalaharriveswiththeEgyptnationalsoccerteamatanairportoutsideGrozny,Russia,June10,day.(Photo/Osports)AntoineGriezmanncarrieshisbaggageastheFrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)OlivierGirouddisembarkstheplaneastheFrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)PaulPogbadisembarkstheplaneastheFrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)UruguaysLuisSuarezarrivesatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)UruguaysEdinsonCavaniarrivesatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)UruguaysEdinsonCavaniarrivesatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)FansgreetUruguaysnationalsoccerteamplayersastheyarriveatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)PerusJeffersonFarfánarrivesattheSheremetyevointernationalairport,outsideMoscow,Russia,tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)PerusPaoloGuerreroarrivesattheSheremetyevointernationalairport,outsideMoscow,Russia,tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)

  Despiteasurprisecutinthereserverequirementratio(RRR)formostcommercialandforeignbanks,ChinaseesnosignofmonetaryeasingandwillmaintainitsprsBankofChina(PBOC)announcedlateTuesdaythatitwillcuttheRRRforbanksexceptpolicylendersbyonepercentagepointfromApril25tohelpsmallbusinesses,andtoimproveoverallstabilityandliquidityintheeconomy."Theprudentandneutralmonetarypolicystanceisunchanged,"()ofthefundsreleasedfromtheRRRcutwillbeusedtopaybackmedium-termlendingfacilities(MLF),whiletheremaining400billionyuanwillbeinjectedintothebankingsystem,ovideloansforsmallandmicrofirmswhileimprovingfinancialservicesforthem,wh,afinancialresearcherwiththeChineseAcademyofSocialSciences,saidthecentralbankmovewasaneutraloperation,astheamountofthenetinjectionissmallaizethecentralbanksliquidityoperationsandtolowerbanks"strongeasingsignal,"theRRRcuthasbeenresumedasamoreregularliquidityoperationtool,,ancingbycommercialbanks,suchascreditsupportforsmallandmicroenterprises,,aBankofChinaresearcher,dismissedconcernsthattheRRRcut,whichcameontheheelsofthereleaseofChinasfirstquarterGDP,,unchangedfromthepreviousquarterandhigherthanthecountrysannualgrowthtargetof"",fficultiesforsmallandmicroenterprises,andprovidingpaymentforMLFwillreducetheinterest"decent,"UBSalsobelievesthatthereisnoneedforChinatoeasemonetarypolicymateriallytosecureitsannualGDPtargetfornow."Recentmarketturmoilandfragilesentimentamidrisingtradefrictionsmaybeaminorpolicyconcern,",,,economistsbelievethatitisunlikelyforthePBOCtonota,reasonablelevelofliquismonetarypolicy,whileremainingprudentandneutral,willbemoreflexibleinthefuture,withmorediverseandstructuralpolicytoolstobeemployedtoencouragefinancialsupportfortherealeconomy.  ChildrenplayonasquareinQingdao,eastChinasShandongProvince,June3,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/ZhangCheng)StudentsofamiddleschoolplayfootballinQingdao,eastChinasShandongProvince,June4,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/LiZiheng)AmangoeswindsurferinginQingdao,eastChinasShandongProvince,May4,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/ZhangCheng)CitizensposeforphotoattheOlympicParkinQingdao,eastChinasShandongProvince,June4,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/LiZiheng)ChildrenpracticerollerskatinginQingdao,eastChinasShandongProvince,June4,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/LiZiheng)AmandoesexercisesataparkinQingdao,eastChinasShandongProvince,June3,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/JiangKehong)AsailboatisseeninthewaterinQingdao,eastChinasShandongProvince,June4,(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/YinGang)

BicyclecartsandbamboobirdcagesQianmenDashilar2015.(PhotobyBruceConnolly/)Inthe1990s,whiletravelingthroughBeijingtowardsouthwestChinaIwouldalwaysspendafewdaysincreasingmyknowledgeofthecity’“Qianmen-Dashilar”appearedinmydiarynotesfromthosedays—anareaIdiscoveredtobebustlingwithstreetlifewhileretainingmuchofthecapital,acafeoverlookingthemassiveZhengyangmenGatecomplex,Iatebreakfast,satatthewindowanddreamed—dreamsofBeijing,theareaIwasinanditsmanyfacetsandepisodeswithinthecity’,butthelocalnameWestHeyanStreet,orWestRiverbankStreet,(ArrowTower)isonthecity’,“FrontGate”oftheMingDynastywallsseparatingtheimperialgrandeurofthenorthfromthevibrant,,re,(PhotobyBruceConnolly/)ItwassouthalongthatroutetheemperorswouldbecarriedtowardstheTempleofHeavenforritualceremoniesbutitwasalsothroughtheJianloupassagewaywhereofficialsandtheirfamilieswouldemergeintothebustlingareasofQianmenandDashilar,ascommerceandentertainmentwektoweroftheformerZhengyangmenRailwayStation—theoriginal“Beijingstation”,,andanelemen,(PhotobyBruceConnolly/)Nextdoor,onQianmenEastStreet,theBeijingPlanningExhib,andbeamazedatthehaphazardlenortharoundDongsi,XisiandZhonggulou,’snarrowestalley,Qianshior“moneymarket”Hutong,,with26mintsproducingcoppercoinsforthecity’,particularlyitswesternside,washometoseveralofChina’searlyfinancialhouses—indeed,walkalongWestHeyanStreetandthereareseverallargeEuropeanclassica,,,atthattime,fascinatingdiscoveriesthroughareasofmainlylow-riseresidentialandcommercialbuildings,includingthe“UndergroundCity”—amazeofanti-nuclearevacuationtunnelsthatwereopentovisitorsatthattime,(PhotobyBruceConnolly/)How,itsfamed“TimeHonoredBrands”—shopsrenownedfortheirhats,silks,foodstuffs,’sfirstcinema,Daguanlou,,featuringasculptureofthefatherofChinesecinema,dong,,itsprestige,runningsouthfromQianmentoZhushikouWestStreet,datesfrom2008andwasmodified,DashilarWestStreetwaspedestrianizedintoacommerciallaneandhomeforlocalprodu(PhotobyBruceConnolly/)Simplyleavingthemainbywaycanleadintoalleyslinedwi—therewouldbemanycol,DashilarisbeingseenbytravelguideslikeLonelyPlanetasbecominga”hip”’slocal-styleArtDecobuildingsbecomingcentersforcontemporaryart,erseasbackpackersandtravelers,peoplewhoprefertospendtimeinlocalareasfilleoundingrooftops,whilelookingdownonthevarietyofdomesticandWester’,studentsoftengohomebybicyclecarts,,Tan’erleadstonorth-runningYanshouStreet,shistory,andforaphotographer,aplacetoca(PhotobyBruceConnolly/)TodaytheQianmen-DashilararearemainsasasmallenclavewithinthegreaterareaofBeijing,butitsmanysurviving,twisting,mindedmemoreofavillagewithinacity,ramswhileschoolchildrenplayedont,—thepeoplewhomakethisoneofthemostfascinatingpartsofoldBeijingtoexplore,andwhere(PhotobyBruceConnolly/)QianmenDajieandJianlouTower2015.(PhotobyBruceConnolly/)Remindersofthepast-formerhomesandformerfactorybuildingsineasternQianmen2015.(PhotobyBruceConnolly/)RooftopsandtraditionalbuildingsofDashilarandQianmen2015.(PhotobyBruceConnolly/)Schoolisout!TanerHutong2015.(PhotobyBruceConnolly/)TheschoolrunTanerHutongDashilar2015.(PhotobyBruceConnolly/)ThesecuritymanandvistortoDashilar2015.(PhotobyBruceConnolly/)TraditionalfoodsinDashilar2015.(PhotobyBruceConnolly/)

  Special:PresidentXiJinpingsaidonSundaythatbroadconsensushadbeenreachedatthe18thShanghaiCooperationOrganizationSummitasleadersendtyonLong-TermGood-Neighborliness,FriendshipandCooperationoftheSCOMemberStates,acooperationprogramtocombatterrorism,separatismandextremism,ityandenvironmentalprotection,andamemorandoperationinsectorsincludingbusiness,customs,,Xisaidatamediabriefingthatallpartieshadagreedtoincreaseunityandcooperationanddeepenthepartnershipthatadvocatespeaceandreform,equaltreatment,openness,,deputysecretary-generaloftheSCO,saidtheQingdammit,PotapenkosaidtheSCOSecretariathadalsoheededmanygoodproposalsfromtheleadersofmembercountries."Inthenextstep,itisourjobtoseethemthrough,",,comprehensive,nceandjointactions."Withtheglobaleconomyfacedwithdifficultiesandsetbacksinitsrecoveryandwithfrequentfront-burnerissuesregionallyandinternationally,nocountrycancopealoneorstandunscathed,"fWTOrules,consolidatetheopen,inclusive,transparent,nondiscriminatoryandrules-basedmultilateraltradesystem,ntstrategieswillalsobereinforced,andcooperationinsectorsincludingbusiness,investment,finance,connectivityandagriculturewillbeenhancedtopromotetradeandinvestmentfacilitationandinjectnewmomentumintotheworldeconomy,ilateralcooperationinareasincludingculture,education,scienceandtechnology,environmentalprotection,health,tourism,youth,mediaandsphangeandcooperationfortheSCO,andallpartiesarewillingtodeepencooperationwithobserverstateanddialoguepartners,aswellasdialogueandexchangeswithUNandotherinternationalorregionalorganizations.

  ChinesePresidentXiJinping(6thR,front)posesforagroupphotowithotherleadersandguestsaheadofthe18thMeetingoftheCouncilofHeadsofMemberStatesoftheShanghaiCooperationOrganization(SCO)inQingdao,eastChinasShandongProvince,June10,(Xinhua/GaoJie)ChinesePresidentXiJinpingchairsthe18thMeetingoftheCouncilofHeadsofMemberStatesoftheShanghaiCooperationOrganization(SCO)inQingdao,eastChinasShandongProvince,June10,(Xinhua/LiXueren)ChinesePresidentXiJinpingchairsthe18thMeetingoftheCouncilofHeadsofMemberStatesoftheShanghaiCooperationOrganization(SCO)inQingdao,eastChinasShandongProvince,June10,(Xinhua/LiXueren)The18thMeetingoftheCouncilofHeadsofMemberStatesoftheShanghaiCooperationOrganization(SCO)isheldinQingdao,eastChinasShandongProvince,June10,(Xinhua/DingLin)XiJinping,presidentofChinathatholdstherotatingpresidencyoftheShanghaiCooperationOrganization(SCO),addressesajointpressconferenceattheSCOsummitinQingdao,eastChinasShandongProvince,June10,,KazakhPresidentNursultanNazarbayev,KyrgyzPresidentSooronbayJeenbekov,PakistaniPresidentMamnoonHussain,RussianPresidentVladimirPutin,TajikPresidentEmomaliRahmonandUzbekPresidentShavkatMirziyoyevalsoattendedthepressconference.(Xinhua/YanYan)TheSoyuzMS-09spacecra,AlexanderGerstofGermanyandcosmonautSergeyProkopyevofRussiablastsofftotheInternationalSpaceStation(ISS)fromthelaunchpadattheBaikonurCosmodrome,Kazakhstan,June6,2018.(Photo/Agencies)TheSoyuzMS-09spacecra,AlexanderGerstofGermanyandcosmonautSergeyProkopyevofRussiablastsofftotheInternationalSpaceStation(ISS)fromthelaunchpadattheBaikonurCosmodrome,Kazakhstan,June6,2018.(Photo/Agencies)TheSoyuzMS-09spacecra,AlexanderGerstofGermanyandcosmonautSergeyProkopyevofRussiablastsofftotheInternationalSpaceStation(ISS)fromthelaunchpadattheBaikonurCosmodrome,Kazakhstan,June6,2018.(Photo/Agencies)TheSoyuzMS-09spacecra,AlexanderGerstofGermanyandcosmonautSergeyProkopyevofRussiablastsofftotheInternationalSpaceStation(ISS)fromthelaunchpadattheBaikonurCosmodrome,Kazakhstan,June6,2018.(Photo/Agencies)

  CraftswomanLiWenlingshowsherpaper-cuttingworksatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince,June6,2018.(Xinhua/LiZiheng)PhototakenonJune6,2018showsafolkmusicperformanceatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince.(Xinhua/GuoXulei)PhototakenonJune6,2018showsateaartshowatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince.(Xinhua/LiZiheng)CraftsmanMuXujianshowsdoughsculpturemakingtojournalistsatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince,June6,2018.(Xinhua/GuoXulei)CraftsmanMuXujianmakesdoughsculpturesatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince,June6,2018.(Xinhua/LiZiheng)

  AguestvisitsgiantpandaMengmengatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)AgirlpickspandasouvenirsatBerlinZooinBerlin,Germany,June9,,thetwogiantpandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)AguesttakesphotosofgiantpandaJiaoqingatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)GuestsvisitgiantpandaJiaoqingatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)PandasouvenirsareseenatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)PandasouvenirsareseenatBerlinZooinBerlin,Germany,June9,,thetwopandasfromChina,arrivedinBerlinonJune24,sstayhereinBerlinZoo.(Xinhua/ShanYuqi)AerialphototakenonJune1,2018showstheQingdaoJiaozhouBayBridgeinQingdao,eastChinauangdaodistrict.(Xinhua/GuoXulei)AerialphototakenonJune1,2018showstheQingdaoJiaozhouBayBridgeinQingdao,eastChinauangdaodistrict.(Xinhua/GuoXulei)AerialphototakenonJune1,2018showstheQingdaoJiaozhouBayBridgeinQingdao,eastChinauangdaodistrict.(Xinhua/GuoXulei)AerialphototakenonJune1,2018showstheQingdaoJiaozhouBayBridgeinQingdao,eastChinauangdaodistrict.(Xinhua/GuoXulei)AerialphototakenonJune1,2018showstheQingdaoJiaozhouBayBridgeinQingdao,eastChinauangdaodistrict.(Xinhua/GuoXulei)

  FormerprofessionalfootballstarDavidBeckhamplayscuju,knownastheoriginofmodernfootball,attheBengbuAncientBuildingsExpoParkaheadofthe2018G-EXPOGlobalTopSummitinBengbuCity,EastChina’sAnhuiProvince,June6,2018.(Photo:ChinaNewsService/ZhongXin)FormerprofessionalfootballstarDavidBeckhamplayscuju,knownastheoriginofmodernfootball,attheBengbuAncientBuildingsExpoParkaheadofthe2018G-EXPOGlobalTopSummitinBengbuCity,EastChina’sAnhuiProvince,June6,2018.(Photo:ChinaNewsService/ZhongXin)

  BrocadepaintingTheDrunkenBeautydisplayedattheParisChinaCulturalCenteronJune5,2018.()ExhibitionReconstruction:TechniquesandDesignofChineseSilkopenCultureDepartment,andorganizedbytheChinaNationalSilkMuseum,theexhibitionisanotherhighlightoftheChineseCultureandTourismMinistrysinternationalprogramofChinaWeek:InheritanceandInnovat,thenewexhibitionpresentsthetechniquesandcharmoftheancientChinesesilkthroughfoursub-themes:Broderie,Impression,Tissage,andTeinture,thatis,embroidery,printing,nJune5,2018.()ZhouWei,theevent’scuratorandassistanttothedirectoroftheChinaNationalSilkMuseum,saidtheexhibitioninfusednewdesignswithtraditionalcraftsman,thecenteralsoheldapubliclectureon"ReconstructionofChineseSilksDesignMaterials"onJune4,andanindustrialexchangemeetingthemed"Reconstruction:TechniquesandDesignofSilk"()Theindustryexchangemeetingon"Reconstruction:TechniquesandDesignofSilk"isheldattheParisChinaCulturalCenteronJune5,2018.()TheexhibitionhallofTeinture.()AmodelshowsasilkflowerdressattheParisChinaCulturalCenteronJune5,2018.()AmodelsshowsasilkdressattheParisChinaCulturalCenteronJune5,2018.()AmodelshowssilkscarvesandhandbagsattheParisChinaCulturalCenteronJune5,2018.()VisitorslookatanembroidereddressattheParisChinaCulturalCenteronJune5,2018.()

  FrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)EgyptiannationalsoccerteamplayerandLiverpoolsstarstrikerMohammedSalaharriveswiththeEgyptnationalsoccerteamatanairportoutsideGrozny,Russia,June10,day.(Photo/Osports)EgyptiannationalsoccerteamplayerandLiverpoolsstarstrikerMohammedSalaharriveswiththeEgyptnationalsoccerteamatanairportoutsideGrozny,Russia,June10,day.(Photo/Osports)AntoineGriezmanncarrieshisbaggageastheFrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)OlivierGirouddisembarkstheplaneastheFrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)PaulPogbadisembarkstheplaneastheFrancenationalsoccerteamarriveattheSheremetyevointernationalairport,outsideMoscow,Russia,June10,2018tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)UruguaysLuisSuarezarrivesatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)UruguaysEdinsonCavaniarrivesatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)UruguaysEdinsonCavaniarrivesatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)FansgreetUruguaysnationalsoccerteamplayersastheyarriveatanairportinNizhnyNovgorod,Russia,June10,2018.(Photo/Agencies)PerusJeffersonFarfánarrivesattheSheremetyevointernationalairport,outsideMoscow,Russia,tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)PerusPaoloGuerreroarrivesattheSheremetyevointernationalairport,outsideMoscow,Russia,tocompeteinthe2018WorldCupinRussia.(Photo/Agencies)PhototakenonJune6,2018showscustomsenforcementofficersinIstanbul’sPendikporthavecaughtundocumentedmigrants,wrappedinaluminumfoiltohidefromx-raydetectors,onan18-wheeltruckenroutetoItaly.(Photo/Agencies)PhototakenonJune6,2018showscustomsenforcementofficersinIstanbul’sPendikporthavecaughtundocumentedmigrants,wrappedinaluminumfoiltohidefromx-raydetectors,onan18-wheeltruckenroutetoItaly.(Photo/Agencies)

  

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2019-10-1406:44 中国搜索网
VolunteersworkatthepresscenteroftheShanghaiCooperationOrganizationQingdaoSummitinQingdaoCity,EastChina’sShandongProvince,June7,alistsfromhomeandabroadatthepresscenter.(Photo/VCG)VolunteersworkatthepresscenteroftheShanghaiCooperationOrganizationQingdaoSummitinQingdaoCity,EastChina’sShandongProvince,June7,alistsfromhomeandabroadatthepresscenter.(Photo/VCG)VolunteersworkatthepresscenteroftheShanghaiCooperationOrganizationQingdaoSummitinQingdaoCity,EastChina’sShandongProvince,June7,alistsfromhomeandabroadatthepresscenter.(Photo/VCG)VolunteersworkatthepresscenteroftheShanghaiCooperationOrganizationQingdaoSummitinQingdaoCity,EastChina’sShandongProvince,June7,alistsfromhomeandabroadatthepresscenter.(Photo/VCG)VolunteersworkatthepresscenteroftheShanghaiCooperationOrganizationQingdaoSummitinQingdaoCity,EastChina’sShandongProvince,June7,alistsfromhomeandabroadatthepresscenter.(Photo/VCG)

  原标题:他追踪降伏静电“幽灵”

【专家小传】

  [专家小传]

  刘尚合,中国工程院院士、我国静电安全工程学科的奠基者和开拓者,全国科学大会奖、中国人民解放军专业技术重大贡献奖、中国静电研究与应用重大贡献奖和何梁何利基金科学与技术进步奖获得者,被评为全国优秀教师、全军优秀教员、全军英模代表,荣立一等功1次、二等功1次、三等功2次。

  晚上七点半回到家,刘尚合照例一头钻进了书房。正在做传统面食柿子饼的老伴赵香莲对此早已习以为常:“不知道时间,他根本不知道时间。”

  听了老伴的唠叨,刘尚合一笑了之。对他来说,如果生命中有个抹不去的符号,那一定是激情。50多年的科研之路,心中不断涌动的激情让刘尚合忽略了时间,忽略了年龄。

  作为中国工程院院士、我国静电安全工程学科的奠基者和开拓者,刘尚合一直都在与一个“幽灵”战斗。这个“幽灵”叫静电,它来无影、去无踪,却频频扮演“杀手”角色,导致电发火装置及易燃易爆物意外发火、爆炸,令人防不胜防。

  刘尚合与静电结缘于30多年前。1983年,在军械工程学院从事基础物理教学的刘尚合被国内外一连串由静电引发的伤亡惨剧所震惊。身为军人的刘尚合敏锐地意识到:“只有彻底攻克这一难题,追踪降伏静电这个‘幽灵’,才能真正确保武器弹药安全。”也就是那一年,刘尚合离开了奋斗10多年的半导体离子注入研究领域,踏上了追踪静电“幽灵”的科研之路。

  在一无科研资料、二无试验设备、三不懂弹药原理的情况下,选择“静电与弹药”这一危险而又陌生的科研领域,需要多大的勇气?回忆起当年的选择,刘尚合说:“为探索未知领域,我愿意重当一名小学生。”

  话虽这样说,但刘尚合永远不会忘记,那是一段怎样的艰难岁月:长时间处于超剂量有害气体和射线辐射的环境,让他的白血球值一度从正常的5000下降到2000;长期超负荷工作,让这个身高1米80的大高个儿体重锐减到60公斤……

  鏖战近千个日夜,刘尚合在防静电危害研究方面终于初露锋芒:在国内首次提出使用物理和化学方法相结合的材料改性技术,一举达到国际先进水平;撰写的论文《聚合物材料防静电改性研究》在国际学术会议上一鸣惊人,专家们一致认为该项研究开辟了人类防静电危害的新途径。

  在大量实验数据基础上,刘尚合首次提出了“信号自屏蔽——电荷耦合”动态电位测试原理,并和同事们一起成功研制出静电电位动态测试仪等5种仪器。经过反复理论推算和仪器精密实验后,刘尚合得出的结果高于英美专家认定的数值。

  如何才能证明自己推测结果的科学性?只靠理论计算显然不行,动物皮毛实验又能否达到人体的效果?为了尽早打通科研瓶颈,刘尚合大胆提出对人体直接进行高电压实验,并提议由他自己亲身来完成。

  实验如期进行。助手们通过专门仪器,让电压从2万伏起步进入刘尚合的身体,他的头发、汗毛一根根竖了起来。4万、5万……已达到国外资料认定的最高值。助手们停了下来,但刘尚合却毫不犹豫指挥下令:继续加压。5.5万、6万、7万……静电电位测试仪的荧屏上显示,他身体上的静电电压已经达到7万1千伏。刘尚合一边紧盯着仪器,一边镇定地指挥着助手,同事们的心都提到了嗓子眼儿。

  这是一个可以载入史册的时刻——人类首次测定并验证了人体静电电位的极端值!

  弹药火工品在储存和运输过程中存在突燃突爆的“反常发火”现象,是困扰世界军事领域几十年的一道难题。由刘尚合主持的“弹药防静电理论与技术研究”项目,一举获得了国家科技进步一等奖。就这样,一次次无畏面对挑战,一项项成果相继问世,刘尚合也一步步登上国际静电研究领域的高峰。

  “在与静电较量的路上,我从未想过放弃。”今天,刘尚合带领着落户军械工程学院的电磁环境效益国家级重点实验室,不断迈向新的征程。

  来源:解放军报

责任编辑:刘光博

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