简介：

简介：ThispaperaimsatstudyingtherelationshipbetweenuniversaltelecommunicationserviceandWestChinadevelopment.It,firstly,introducesourcountry'sdemandsforuniversaltelecommunicationservice;secondly,analysesthedemandofWestChinadevelopmentfortheuniversaltelecommunicationservice;thirdly,depictsthedevelopmentstatusoftelecommunicationindustryofthewestregion;fourthly,pointsoutthesignificanceofuniversaltelecommunicationservicetothewestarea;andlastly,bringsforwardtheconnotationofuniversaltelecommunicationserviceofwestarea.

简介：Asanimportantcomponentofinternetofthings,electronicproductcode(EPC)systemiswidelyusedinmanyareas.However,themassdeploymentofEPCsystemisfrequentlydegradedbysecurityandprivacyproblems.Therefore,themajorresearchesfocusonthedesignofasecureEPCsystemwithhighefficiency.ThispaperdiscussesthesecurityrequirementsofEPCsystemandpresentsauniversalcomposable(UC)modelforEPCsystem,theidealfunctionalityofEPCsystemisalsoformallydefinedwiththeUCframework.ThenasecureprotocolforEPCsystemunderUCframeworkisproposedandtheanalysisofsecurityandperformanceoftheproposedprotocolisgiven,incomparisonwithotherprotocols,theresultsshowthattheproposedprotocolisUCsecureandcanprovideprivacyprotection,untraceability,authorizedaccess,anonymityandconcurrentsecurityforEPCsystem.Furthermore,lesscomputationandstorageresourcearerequiredbytheproposedprotocol.

简介：1176LN是从流行的UniversalAudio175和176真空管限幅器演化而来．既保留了业界领先的固有优势．又为限幅器制订了一个新的规范。它的晶体管电路提供超一流的声音表现和独特的声音特性．是限幅器技术上的一次重大突破。