简介:Becauseofrapiddevelopmentinnetworktechnology,Internetusagehasbecomewidespread.Itallowsuserswithsensingdevicestoobtainmedicaldataforhealthcare,suchasphysiologicalsignals,voice,andvideostreamsfromtelemedicinesystems,andtosendthehealthcaredatatoback-enddatabasesystems,creatingaubiquitoushealthcareenvironment.However,thisenvironmentrequiresawidespreadandsuitablenetwork.IPv6(Internetprotocolversion6)isthenext-generationInternetprotocolthatwillbetheprotocoloffuturenetworks;itimprovesmanyshortcomingsofIPv4.Inthispaper,weproposeanIPv6/IPv4U-home-caretestsystemandanalyzethenetwork’sparametersthoughaseriesoftestsbyadjustingnetworkparameterstofindtheoptimaldesignforapplicationsintheIPv6/IPv4U-home-careservicesoastoassuregoodperformanceandhighquality.
简介:Aneworganicsemiconductortartaricaciddopedsaltofemeraldinepolyaniline(PANI-C4H6O6)hasbeenobtainedbythemethodofoxidativepolymerizationofmonomericanilinewithammoniumpersulfateinacidicsolution.ThestructurewascharacterizedbyFourierTransformInfraredtechnique(FTIR)andX-raydiffraction(XRD).Thetemperaturedependencedcconductivityδdc(T)showsasemiconductorbehaviorandfollowsthequasionedimensionalvariablerangehopping(Q1D-VRH)model.Dataonδdc(T)arealsodiscussed.
简介:介绍了VDL-4数据链通信技术与GPS定位技术,并利用其设计了一套实用化的机场场面车辆管理系统。分析了该系统中的车载终端系统采用GPS+航位推算(DR)+地图匹配(MM)技术不仅可以提高系统的定位精度,而且也可以提高抗GPS遮挡能力。由于VDL-4数据链符合ADS-B技术标准,也便于将该系统扩展到飞机上应用,实现统一的场面管理。
简介:旧金山时间2009年1月5日,美国杜比实验室(DolbyLaboratories)旗下的专利授权项目管理公司ViaLicensing公司宣布为MPEG-4SLS(ScalabletoLosslessCoding尺度灵活的无损编码)技术推出联合专利授权项目。SLS是一种音频压缩技术,它能将MPEG-4AAC(AdvancedAudioCoding先进音频编码)方式编码的节目从感觉上无差别的还音方式(perceptuallytransparentplayback)拓展成真正无损的音质,并且其中的尺度可以由用户灵活掌控。