简介:摘要:在全球一体化进程中,为应对新一波市场竞争并建立国际化经营模式,我国国有公司都已经意识到项目管理的重要意义。PMP理念是一种具有国际影响力的管理理论,在我国已被广泛应用与多个领域,然而在实际工作中,PMP理念是否能够被应用于工程项目的管理中,已成为目前我国工程建设面临的一个重要课题。因此,本文从PMP管理思想出发,以相关实例为基础,对PMP管理思想在实践中的运用作重点论述。
简介:Weproposethespectrumallocationandresourceschedulingalgorithmsincognitivepointtomultipoint(PMP)networkswithrapidchangesofspectrumopportunitiesandpresentamediaaccesscontrol(MAC)protocolbasedonthesealgorithms.Theobjectiveofspectrumallocationistomakeefficientuseofthespectrumwhilemaintainingthetransceiversynchronizationonfrequencyandtimeinthenetwork.Theobjectiveofresourceschedulingistoguaranteethequalityofservice(QoS)requirementsofdifferentkindsofconnectionsandtominimizethetotalenergyconsumptioninthenetworkaswell.Bysensingonlyasmallsetofpossiblechannelsineachslotbasedonthestatetransitionprobabilityofeachchannel,ourspectrumallocationalgorithmachieveshighspectrumefficiencyinthenetwork.Theresourceschedulingproblemisdividedintothreesubproblemsandwederiveoptimalsolutionstotheseproblemsbygreedyalgorithmandconvexoptimization.Thesimulationresultsshowthatouralgorithmcanmakeefficientuseofthespectrumandthenetworkresourcesatacostoflowcomputationalcomplexity.