简介:而Ad Hoc网络中移动主机的移动将会导致拓扑结构的改变,为了达到Ad Hoc网络中的移动主机可以在不同的Ad Hoc网络间移动和随时接入互联网,而Ad Hoc网络由移动主机构成
简介:7.网络操作和服务的安全性 Ad Hoc网络的安全操作需要对链路或网络层进行保护,Ad Hoc网络中没有基站或中心节点,6. 信任问题 在对安全敏感的Ad Hoc网络应用环境中
简介:简介:AD9433是一种12位单片采样A/D转换器,为模拟器件公司的产品.它具有片上跟踪/保持电路,在设计上追求使用方便.该产品转换速率高达125MSPS,并为适应宽带和高IF载波系统中的突出动态性能做了优化设计.
简介:移动Ad Hoc网络 自组网 MAC协议 路由协议 蓝牙网络 应用一、移动Ad Hoc网络的历史一般认为,二、移动Ad Hoc网络的特征与研究热点由于移动Ad Hoc网络是一种移动、多跳、自律式系统,三、移动Ad Hoc网络的应用移动Ad Hoc网络潜在的应用很多
简介: 简介: AD9709是模似器件公司生产的一种双通道高速8位CMOSD/A转换器,它是双通道TxDAC引脚兼容系列产品的成员之一,该系列器件可提供8、10、12和14位分辩率.AD9709集成了两个高品质8位TxDAC+总核、一个电压基准和数字接口电路,采用48引脚小型LQFP封装.这种D/A转换器可提供特别的ac和dc性能,同时支持达125MSPS速率. ……
简介:ThispaperpresentsadaptivehybridprotocolsbasedonthedeclarativenetworkandmainlydiscussestheprincipleandrealizationoftheBayesian-estimationbasedadaptivehybridprotocolinthedeclarativenetwork,whichiswelladaptedtotheMobileAdhocNETwork(MANET).Theadaptivehybridprotocolisdesignedforadhocnetworkswhichhavecharacteristicslikeself-organizing,notrustedparty,flexibility,etc.Thenodesthatrunthehybridprotocolcanautomaticallyselectoneroutingprotocolthatissuitablefordifferentnetworkenvironment.TheBayesian-estimationbasedadaptivestrategy,thatimprovestheadaptabilityandstabilityoftheprotocol,succeedsintheRapidnet,adeclarativenetworkengine.TheresultintheRapidnetprovesthatthehybridprotocolandtheadaptivestrategyarefeasible.Theexperimentonthens-3simulator,anemergingdiscrete-eventnetworksimulator,validatesthatthisprotocolperformswellandreducescommunicationoverheads.
简介:AD(Alternatingdirection)Galerkinschemesford-dimensionalnonlinearpseudo-hyperbolicequationsarestudied.Byusingpatchapproximationtechnique,ADprocedureisrealized,andcalculation,workissimplified.ByusingGalerkinapproach,highlycomputationalaccuracyiskept.Byusingvariousprioriestimatetechniquesfordifferentialequations,difficultycomingformnon-linearityistreated,andoptimalH^1andL^2convergenceprop-ertiesaredemonstrated.Moreover,althoughalltheexistedADGalerkinschemesusingpatchapproximationarelimitedtohaveonlyoneorderaccuracyintimeincrement,yettheschemesformulatedinthispaperhavesecondorderaccuracyinit.ThisimpliesanessentialadvancementinADGalerkinaualysis.