鄂州| 宜宾县| 杭锦后旗| 囊谦| 云溪| 海伦| 石台| 察布查尔| 宁国| 曲水| 太仓| 新田| 沅陵| 宜君| 天津| 肃宁| 平昌| 肥东| 宾川| 舞阳| 木兰| 高青| 双牌| 巴林右旗| 铜山| 中江| 临汾| 沿滩| 固安| 屏山| 松江| 玉田| 沧县| 攸县| 察哈尔右翼后旗| 杂多| 易门| 铜山| 番禺| 喀喇沁左翼| 石家庄| 鹰潭| 万源| 科尔沁左翼中旗| 通河| 郎溪| 张家口| 威信| 合浦| 瓯海| 杂多| 广德| 嘉善| 南安| 亚东| 镇康| 鹤壁| 浑源| 克拉玛依| 萨嘎| 宁河| 内丘| 梨树| 峨眉山| 南城| 霍邱| 增城| 融水| 开县| 万州| 监利| 芜湖县| 荣县| 阳信| 固阳| 上高| 崇左| 科尔沁右翼前旗| 建阳| 瑞金| 曾母暗沙| 连南| 利辛| 留坝| 开县| 积石山| 米易| 石拐| 旌德| 曾母暗沙| 张家界| 承德县| 黟县| 临沂| 大方| 临邑| 遂平| 玉田| 简阳| 绥芬河| 济源| 克拉玛依| 武胜| 秭归| 宿松| 唐海| 邵阳市| 义县| 保定| 张家港| 荆州| 金溪| 海淀| 长岭| 乌拉特前旗| 东乡| 小金| 岚皋| 湘潭市| 台前| 邹平| 安乡| 东光| 鸡泽| 勐腊| 吴忠| 茶陵| 化隆| 金佛山| 来安| 让胡路| 五华| 穆棱| 怀仁| 应县| 伊吾| 千阳| 佳县| 宜宾县| 涠洲岛| 沙湾| 高雄市| 同安| 乐业| 湘东| 繁峙| 溧阳| 仁寿| 玉屏| 德清| 鸡东| 浚县| 临武| 南海| 山阳| 石柱| 寿阳| 南宁| 泸定| 黄山市| 福清| 资阳| 泾川| 新建| 雷波| 营口| 海城| 盐边| 黄山区| 望城| 大城| 康平| 曲周| 盐池| 白银| 北仑| 东兴| 白山| 象州| 莘县| 龙凤| 九江县| 滦南| 峰峰矿| 承德市| 毕节| 索县| 大丰| 肃北| 霍州| 沧州| 磐安| 新巴尔虎右旗| 田阳| 盐池| 白城| 喀喇沁左翼| 滴道| 焦作| 灵山| 麟游| 怀化| 潮安| 常山| 合江| 馆陶| 旬邑| 乃东| 临高| 加格达奇| 辽源| 达坂城| 仁怀| 大田| 临朐| 武城| 长沙| 康马| 泰宁| 凤凰| 美姑| 师宗| 万年| 西沙岛| 阳城| 沧州| 承德县| 华容| 个旧| 永吉| 新乡| 曲阜| 久治| 余江| 潘集| 沅陵| 青海| 黑河| 青县| 定结| 蒙山| 安仁| 富源| 石楼| 香河| 长乐| 徽县| 两当| 昆山| 沙河| 苏家屯| 上海| 清徐| 乌尔禾| 西宁| 萍乡| 黄岩| 富顺| 连平| 陇西| 长沙县| 易县| 西固|

晴天回归京城 局地将有扬沙19日最高仅有20℃

2019-09-21 03:04 来源:新浪网

  晴天回归京城 局地将有扬沙19日最高仅有20℃

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

PhototakenonJune6,2018showscustomsenforcementofficersinIstanbul’sPendikporthavecaughtundocumentedmigrants,wrappedinaluminumfoiltohidefromx-raydetectors,onan18-wheeltruckenroutetoItaly.(Photo/Agencies)PhototakenonJune6,2018showscustomsenforcementofficersinIstanbul’sPendikporthavecaughtundocumentedmigrants,wrappedinaluminumfoiltohidefromx-raydetectors,onan18-wheeltruckenroutetoItaly.(Photo/Agencies)(ECNS)--AcuisinegalaorganizedbytheShizuokaInternationalBusinessAssociationShanghaiOfficeandtheJapanCouncilofLocalAuthoritiesforInternationalRelations(CLAIR)atABCCookingStudiowasheldintheheartofBeijing,deputydirectoroftheShizuokaInternationalBusinessAssociationShanghaiOffice,saidtoparticipantsthatonlyinShizuokacouldvisitorsaccessthreeiconicsymbolsofJapanesetourismatonce--MountFuji,theShinkansenLineandcherryblossoms,,locatedincentralJapan,,includingJapan,apopularresortinallfourseasons,deservesmultiplevisits,,ithasthemostspahotelsamongJapan’anothercharminShizuoka,whichenjoysconvenienttransportationviatheShinkansenbullettrainthatlinksitinaboutanhourtoTokyoandNagoya,aswellasTomeiExpressway.

  PhototakenonJune2,2018showsthenightviewnearWusiSquareinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/GuoXulei)PhototakenonJune1,2018showsthereflectionofWusiSquareonaballooninQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/JinLiangkuai)PhototakenonJune1,2018showsthereflectionofWusiSquareonaballooninQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/JinLiangkuai)PanoramaphototakenonJune2,2018showsthenightviewofWusiSquareinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/YinGang)PanoramaphototakenonJune2,2018showsthenightviewofWusiSquareinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/YinGang)PhototakenonJune4,2018showsthenightviewofZhanqiaoPierinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/JiangKehong)PhototakenonJune4,2018showsthenightviewofWusiSquareinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/MaNing)PhototakenonMay31,2018showsthenightviewofOlympicSailingCenterinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/WangJianhua)PhototakenonMay3,2018showsthenightviewofFushanBayinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/LiZiheng)PhototakenonMay7,2018showsthenightviewofFushanBayinQingdao,eastChina(SCO)SummitisscheduledforJune9to10inQingdao.(Xinhua/GuoXulei)PhototakenonJune6,2018showsanimalsaretryingallpossiblewaystokeepcoolatTianjinZooastemperaturescontinuerising.(Photo:ChinaNewsService/TongYu)PhototakenonJune6,2018showsanimalsaretryingallpossiblewaystokeepcoolatTianjinZooastemperaturescontinuerising.(Photo:ChinaNewsService/TongYu)PhototakenonJune6,2018showsanimalsaretryingallpossiblewaystokeepcoolatTianjinZooastemperaturescontinuerising.(Photo:ChinaNewsService/TongYu)PhototakenonJune6,2018showsanimalsaretryingallpossiblewaystokeepcoolatTianjinZooastemperaturescontinuerising.(Photo:ChinaNewsService/TongYu)

  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)(ECNS)--AcuisinegalaorganizedbytheShizuokaInternationalBusinessAssociationShanghaiOfficeandtheJapanCouncilofLocalAuthoritiesforInternationalRelations(CLAIR)atABCCookingStudiowasheldintheheartofBeijing,deputydirectoroftheShizuokaInternationalBusinessAssociationShanghaiOffice,saidtoparticipantsthatonlyinShizuokacouldvisitorsaccessthreeiconicsymbolsofJapanesetourismatonce--MountFuji,theShinkansenLineandcherryblossoms,,locatedincentralJapan,,includingJapan,apopularresortinallfourseasons,deservesmultiplevisits,,ithasthemostspahotelsamongJapan’anothercharminShizuoka,whichenjoysconvenienttransportationviatheShinkansenbullettrainthatlinksitinaboutanhourtoTokyoandNagoya,aswellasTomeiExpressway.

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)

  EveryfoodconnoisseurfromGuyFieritoEmerilLagassehasheardBocuseDordescribedas"themostprestigiousculinarycompetitionintheworld."ThosngatheredtogetherinGuangzhou,asthesouthernChinesecityhostedtheeventforthefirsttime."BeinginGuangzhouisfantastic,"saysStefanStiller,presidentofBocuseDOrAsiaPacific."HavingthiseventinChinaisextremelyfantastic."FantasticinpartbecauseofamilestoneanniversarybetweenGuangzhouandLyon,France,thebirthplaceofBocuseDOr."LyonisthefoodcapitalofFrance,andGuangzhouisthefoodcapitalofSouthChina,"Stillersaysaboutthetwocitiescelebrating30yearsaspartnercities."Wehavealotofsynergy,similarities,andsotherearealotofreasonswhywearehere."1  

  AwomanisseenatGhandrukvillageofKaskidistrictinNepal,June6,2018.(Xinhua/SunilSharma)MulescarryingemptygascylindersproceedtowardsGhandrukvillagefromChhomrongvillageofKaskidistrictinNepal,June6,2018.(Xinhua/SunilSharma)PeoplecarryironnetsusedforconstructionatChhomrongvillageofKaskidistrictinNepal,June6,2018.(Xinhua/SunilSharma)AmanworksinthefieldatChhomrongvillageofKaskidistrictinNepal,June6,2018.(Xinhua/SunilSharma)LocalscutthehairofsheepatChhomrongvillageofKaskidistrictinNepal,June6,2018.(Xinhua/SunilSharma)PandasshowofftheirsoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)Asthe2018FIFAWorldCupapproaches,letsseehowgiantpandasinSWChinasSichuanarepreparingforthebigevent!PandasshowofftheirsoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)PandasshowofftheirsoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)PandasshowofftheirsoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)ApandashowsoffitssoccerskillsattheChinaConservationandResearchCenterforGiantPandainSouthwestChinasSichuanProvinceonJune10aheadoftheFIFAWorldCup.(Photo/CourtesyoftheChinaConservationandResearchCenterforGiantPanda)

  JournalistsdopreparationworkattheMediaCenteroftheShanghaiCooperationOrganization(SCO)QingdaoSummitinQingdao,eastChinasShandongProvince,June6,fromJune6to11.(Xinhua/LiZiheng)JournalistsdopreparationworkattheMediaCenteroftheShanghaiCooperationOrganization(SCO)QingdaoSummitinQingdao,eastChinasShandongProvince,June6,fromJune6to11.(Xinhua/LiZiheng)AjournalistworksattheMediaCenteroftheShanghaiCooperationOrganization(SCO)QingdaoSummitinQingdao,eastChinasShandongProvince,June6,fromJune6to11.(Xinhua/LiZiheng)JournalistsdopreparationworkattheMediaCenteroftheShanghaiCooperationOrganization(SCO)QingdaoSummitinQingdao,eastChinasShandongProvince,June6,fromJune6to11.(Xinhua/LiZiheng)Acameramanworksatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince,June6,o11.(Xinhua/LiZiheng)

  TheFengyun-2Hmeteorologicalsatellite,carriedbyaLongMarch-3Arocket,islaunchedfromtheXichangSatelliteLaunchCenterinsouthwestChinasSichuanProvince,June5,2018.(Xinhua/LiangKeyan)TheFengyun-2Hmeteorologicalsatellite,carriedbyaLongMarch-3Arocket,islaunchedfromtheXichangSatelliteLaunchCenterinsouthwestChinasSichuanProvince,June5,2018.(Xinhua/LiuKun)TheFengyun-2Hmeteorologicalsatellite,carriedbyaLongMarch-3Arocket,islaunchedfromtheXichangSatelliteLaunchCenterinsouthwestChinasSichuanProvince,June5,2018.(Xinhua/LiuKun)(CNS),astate-levelnewsagencysponsoredandestablishedbyChinesejournalistsandrenownedoverseasChineseexpertsonOctober1,(),,,includingin-depthcoverage,featurestoriesandvisualcontent,withtopicssuchascurrentevents,art,lifestyle,(CNS)isnotonlyastate-levelnewsagencyspreadingnewsworldwide,butalsoaninternationalnewsagencywithsubscribersinTaiwan,HongKongandMacao,,formervicechairmanoftheStandingCommitteeoftheNationalPeoplesCongress,,therewereothermajorsponsorsandbuilders,suchasJinZhonghua,HuYuzhi,,awell-knownexpertoninternationalissues,,CNSwastheInternationalNewsService,,adatabaseofinforma(includingwritings,photosandspecialarticles)andamodernmethodofreporting(mainlythroughinternet,videosandSMS)providedtooverse,,HongKongandMacao,aswellasbranchesorreportstationsinTokyo,Bangkok,KualaLumpur,NewYork,Washington,LosAngeles,SanFrancisco,Vancouver,London,Paris,,andnewsreleasecentershavebeenestablishedinBeijing,,multi-levelandmulti-functionnewsreleasesystem,CNSprovidesallkindsofnewsandinformation,’,,1999,theheadquartersofCNSlauncheditsofficialwebsite,namedChinanews().ChinanewsisconsideredoneofChina’smostimportantonlinenewssources.

  PhototakenonJune4,2018showspassengershipsacrosstheQiongzhouStrait,betweenHainanandGuangdong,werehaltedduetoanapproachingtyphoon,e8.(Photo:ChinaNewsService/LuoYunfei)PhototakenonJune4,2018showspassengershipsacrosstheQiongzhouStrait,betweenHainanandGuangdong,werehaltedduetoanapproachingtyphoon,e8.(Photo:ChinaNewsService/LuoYunfei)PhototakenonJune4,2018showspassengershipsacrosstheQiongzhouStrait,betweenHainanandGuangdong,werehaltedduetoanapproachingtyphoon,e8.(Photo:ChinaNewsService/LuoYunfei)

  Eightetiquettevolunteersposeforaphotoatthemediacenterforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince,June5,,000volunteershavebeenmobilizedtoofferservicesforthesummit,fromassistingwithguestsarrivalanddeparture,translation,andmediarequests,totheoperationofcityfunctionssuchastransportation,telecommunication,andbanks.(Xinhua/LiZiheng),2008showsJiangShifa(R)andhiswifeLianShifangasvolunteersfortheBeijing2008OlympicGamesSailingeventinQingdao;LowerphototakenonJune5,2018showsthecoupleasvolunteersfortheShanghaiCooperationOrganization(SCO)QingdaoSummit,inQingdao,eastChina,74yearsoldandhiswife,72yearsold,ittenyearsaftertheyservedasvolunteersfortheBeijing2008OlympicGamesSailingeventinQingdao.(Photo/Xinhua)JiangShifa(R)andhiswifeLianShifang,volunteersfortheShanghaiCooperationOrganization(SCO)QingdaoSummit,guideatouristinWendengRoadinQingdao,eastChinasShandongProvince,June5,,74yearsoldandhiswife,72yearsold,ittenyearsaftertheyservedasvolunteersfortheBeijing2008OlympicGamesSailingeventinQingdao.(Xinhua/JiangKehong)JiangShifa(R)andhiswifeLianShifang,volunteersfortheShanghaiCooperationOrganization(SCO)QingdaoSummit,giveouthandbooksatMingxialuCommunityinQingdao,eastChinasShandongProvince,June5,,74yearsoldandhiswife,72yearsold,ittenyearsaftertheyservedasvolunteersfortheBeijing2008OlympicGamesSailingeventinQingdao.(Xinhua/JiangKehong)JiangShifa(R)andhiswifeLianShifang,volunteersfortheShanghaiCooperationOrganization(SCO)QingdaoSummit,gatheratMingxialuCommunityfortraininginQingdao,eastChinasShandongProvince,June5,,74yearsoldandhiswife,72yearsold,ittenyearsaftertheyservedasvolunteersfortheBeijing2008OlympicGamesSailingeventinQingdao.(Xinhua/JiangKehong)JiangShifa(3rdR)andhiswifeLianShifang(2ndR),volunteersfortheShanghaiCooperationOrganization(SCO)QingdaoSummit,guidepassengersatabusstopinQingdao,eastChinasShandongProvince,June5,,74yearsoldandhiswife,72yearsold,ittenyearsaftertheyservedasvolunteersfortheBeijing2008OlympicGamesSailingeventinQingdao.(Xinhua/JiangKehong)EtiquetteteacherLuMin(1stR)instructsvolunteersforthe18thShanghaiCooperationOrganization(SCO)SummitinQingdao,eastChinasShandongProvince,June5,,000volunteershavebeenmobilizedtoofferservicesforthesummit,fromassistingwithguestsarrivalanddeparture,translation,andmediarequests,totheoperationofcityfunctionssuchastransportation,telecommunication,andbanks.(Xinhua/LiZiheng)Eightetiquettevolunteersforthe18thShanghaiCooperationOrganization(SCO)SummitpracticeinQingdao,eastChinasShandongProvince,June5,,000volunteershavebeenmobilizedtoofferservicesforthesummit,fromassistingwithguestsarrivalanddeparture,translation,andmediarequests,totheoperationofcityfunctionssuchastransportation,telecommunication,andbanks.(Xinhua/LiZiheng)

  FolkartistZhangBinmakesdoughfigurinesinanintangibleculturalheritagefairinShenyang,capitalofnortheastChinasLiaoningProvince,June9,ritageDayonSaturday.(Xinhua/YaoJianfeng)PeoplevisitChineseculturalheritageartexhibitioninGuangzhou,southChinasGuangdongProvince,June9,ritageDayonSaturday.(Xinhua/LuHanxin)ApersonvisitsChineseculturalheritageartexhibitioninGuangzhou,southChinasGuangdongProvince,June9,ritageDayonSaturday.(Xinhua/LuHanxin)InkstoneamateurscompeteinaninkstonecarvingcontestinWuyuan,eastChinasJiangxiProvince,June9,ritageDayonSaturday.(Xinhua/SongZhenping)AchildgetshissugarpaintinginanintangibleculturalheritagefairinShenyang,capitalofnortheastChinasLiaoningProvince,June9,ritageDayonSaturday.(Xinhua/YaoJianfeng)AfolkartistcommunicateswithonlineaudienceinnorthChinasTianjinMunicipality,June9,ritageDayonSaturday.(Xinhua/LiRan)PhototakenonJune7,2018showsexhibitsattheAfricanArtExhibitioninsouthwestChina(Xinhua/WangQuanchao)AcuratorintroducestheAfricanArtExhibitionheldinsouthwestChinasChongqing,June7,(Xinhua/WangQuanchao)JournaliststakephotosattheAfricanArtExhibitioninsouthwestChinasChongqing,June7,(Xinhua/WangQuanchao)PhototakenonJune7,2018showsexhibitsattheAfricanArtExhibitioninsouthwestChina(Xinhua/WangQuanchao)AjournalisttakesphotosattheAfricanArtExhibitioninsouthwestChinasChongqing,June7,(Xinhua/WangQuanchao)

  

  晴天回归京城 局地将有扬沙19日最高仅有20℃

 
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更强大的“光子芯片”或将问世
2019-09-21 作者: 萧潇 来源: 经济参考报

  近日,哥伦比亚大学应用物理系助理教授虞南方(Nanfang Yu)博士率领的研究团队,利用纳米天线,成功地发明了一种能够在狭窄路径(即“波导”)中,对光线传播进行高效控制的新途径。

  相比于依赖电子进行数据传输的集成电路来说,光子集成电路(IC)主要利用在波导中传播的光线进行数据传输,而打造这类电路的关键在于,对光传播这一过程进行有效控制。虞南方的方法将为人们带来更快、更强大、效能更高的光子芯片。不仅如此,这样的芯片反过来也将为光子通信与光子信号处理带来翻天覆地的变革。

  如何以有效的方式去控制波导中传播的光线?虞南方说,这个问题一直是这一领域最为基础和重要的科学问题。而我们的工作则为这个问题找到了一个革命性的答案。我们所打造的这一个集成纳米光子器件,所占面积是有史以来最小的,但却同时拥有迄今为止最宽的工作带宽。在纳米天线的帮助下,我们能够大大减小光子集成器件的尺寸。

  虞南方的团队发现,对于在波导管中传播的光线而言,最为有效的控制手段是利用光线纳米天线去“修饰”波导管。这些微型天线能够从波导芯片内部吸收光线,改变光线的性质,随后又将这些修饰过的光线释放回波导之中。密集堆叠的纳米天线表现出了极强的累积效应,他们能够在不超过两倍波长的传播距离内,实现诸如波导模式转换等功能。

  虞南方说,“在传统方法中,我们使用的器件长度大多数达到了波长的数百倍。考虑到这一点,我们的研究称得上是一次重大突破。我们已经能够将设备的尺寸减小到原来的十分之一甚至百分之一。”

  虞南方团队打造了一款可将某一波导模式转换为另一波导模式的模式转换器。而这一转换器是实现所谓的“模式分多路复用”(MDM)这一技术的关键所在。一个光波导可以承载一组基础波导模式,以及一系列更高阶的波导模式,正如同一根吉他弦既能弹奏出一个基本音,也可以作为和弦中的一部分。

  MDM这一手段能够大大增强一块光学芯片的信息处理能力。具体来说,在同一根波导管内,人们可以使用颜色相同但是拥有不同波导模式的光线,实现同时传输多个独立的信道。

  虞南方的下一步计划,是将具有主动调节功能的光学材料置入光子集成芯片内部,从而实现对在波导内部传播的光线的主动控制。该装置有望成为现实增强(AR)眼镜的基本组成单元。

  目前,虞南方正与他哥伦比亚大学的同事们就这一项目展开合作。除此之外,虞南方还在探索将波导中传播的波转换为强表面波,在未来,这或许可用作芯片上的化学与生物传感器。

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