简介:BackgroundRightbundlebranchblock(RBBB)maypresentasslurredornotchedSwaveinleadV1.However,slurredornotchedSwavemayalsorepresentslowconductioninthemyocardium.MethodsWeretrospectivelyanalyzedtheQRSpatternsinleadsV3RtoV5Rin7patientswithaslurredornotchedSwaveinleadV1.ResultsIntheleadsV3RtoV5R,6patientsshowedincompleteorcompleteRBBBand1patientslurredornotchedSwave.ConclusionsInthemajorityofECGsinasmallpatientserieswithslurredornotchedSwaveinleadV1,QRSmorphologyindicatingincompleteorcompleteRBBBwaspresentinleadsV3RtoV5R.AfindingoffragmentedQRSintheseleadsmayindicateslowconductioninthemyocardium.
简介:近年来,随着我国移动通信技术的迅速发展,出现了一种新型的通信技术TD—LTE。其技术具有网速快、运用灵活、应用范围广、发展前景大等扰势。因此更适合现代社会的发展需求,从而成为现代社会的主要通信方式。文章主要介绍了TD—LTE的概念,从而针对TD—LTE技术在移动互联网中的应用情况进行了分析,并提出了TD—LTE技术的发展前景,以供大家参考。
简介:Self-configurationofphysicalcellidentity(PCI)isakeyfeatureforthelongtermevolutionadvanced(LTE-A)network.ThePCIisusedtoidentifythedifferentcellsinthesystem,becominganessentialcellconfigurationparameter.ConsideringtheuncoordinateddeploymentsoftheevolvedNodeB(eNodeB)andthelimitednumberofPCI,thePCIassignmentforcellswouldbequitecomplex.ThispaperpresentsandputsforwardagraphtheorybasedcentralizedPCIself-configurationscheme(GT-PCIS).ThePCIself-configurationproblemismappedtothewell-knownminimumspanningtree(MST)probleminordertooptimizethePCIreusedistanceanddecreasethemultiplexinginterferencethroughouttheentirenetwork.TheproposalprovidesagreedysearchtomakethelocallyoptimalselectionofPCIateachstage,andtoachieveaglobaloptimum.Todemonstratethealgorithmvalidity,performancesofGT-PCISandmanualconfigurationareevaluated.SimulationresultsshowthattheproposedGT-PCISoutperformsotherconfigurationalgorithmsevenundertheconditionofseverePCIdeficiency.