简介:A2-cmlongBragggratingwithreflectivityof~99.95%inB/Gecodopedopticalfiberwithouthydrogenloadingwascreatedbyphase-maskmethodwithapulsedKrFexcimerlaserat248nm.DCandACcomponentsofrefractiveindexchangewereanalyzedbymonitoringtransmissionspectrumevolutionduringthewritingprocessoffiberBragggrating.Therelationsoftheevolutionofcenterwavelengthandreflectivitywithnumberofpulseswererespectivelyinvestigated.
简介:随着广播式自动相关监视(ADS-B)技术的推广应用,作为ADS-B体系的组成部分的ADS-B地面站已经成为保障ADS-B使用效能的重要环节。在探讨ADS-B基本理论的基础上,对ADS-B地面站的架构、功能、规划与建设等方面进行了分析,并提出了相关设计方法和理念。
简介:Anautomaticdependentsurveillancebroadcast(ADS-B)systemhasserioussecurityproblems,andthedatacanbespoofedduringbroadcastingprecisepositioninformationofaircraft.AsolutionoftheADS-Bsystemdataauthenticationbasedontheellipticcurvecipher(ECC)andX.509certificateisproposed.ItcanavoidthekeydistributionproblembyusingthesymmetrickeyalgorithmandpreventtheADS-Bdatafrombeingspoofedthoroughly.ExperimentaltestresultsshowthatthesolutionisvalidandappropriateinADS-Buniversalaccesstransceiver(UAT)mode.
简介:13年,只是人类历史长河中的一个瞬间,13年,可以让襁褓中的婴儿成长为风华正茂的少年,13年的时间,TEL中国从一个人发展到今天200多名员工,特别是2011年1月18日东电光电半导体设备(昆山)有限公司的开工庆典,标志着TEL在中国发展的里程碑。目前,TEL是平板显示行业排
简介:Inthispaper,buildingtogrid(B2G)andvehicletogrid(V2G)havebeendefinedwithclearandpracticalunderstanding.Bothofthemarenewgenerationtechnologieswhicharetheessentialpartofsmartcitylivingandcrowdenergyclustering.Firstly,anin-detailedoverviewhasbeenprovidedwithanintroductiontoB2GandV2Gfollowedbyahistoricaloverviewandtheoreticalanalysisinrespecttosmartcityplanning.Next,areviewisconductedoncurrentandprevioussmartlivingresearch,whichdealswithB2GandV2G.EfficientB2GandV2Gimplementationsinpracticalcasesthenhavebeendiscussed.Lastly,bothofthesetechnicalprospectshavebeenanalyzedincrowdenergydiagram.