简介:文章引入了(L,M)-fuzzy层次拓扑空间范畴,讨论了它与L-fuzzy层次拓扑空间范畴的关系,证明了(L,M)-fuzzy层次拓扑空间范畴、(L,M)-fuzzy层次邻域空间范畴、(L,M)-fuzzy层次闭包空间范畴以及(L,M)-fuzzy层次内部空间范畴等均是等价的。
简介:主要研究了解析Besov型空间Bsp在Bloch空间B的闭包问题.同时,给出了一个相关应用.
简介:班会背景杭州是全国文明城市,这次有幸承办G20峰会,对杭城的小学生来说也是一个德育契机。我校开展了一系列的德育活动,如'寄语G20,做好东道主''扮靓家庭阳台,迎接国际峰会''倡导地铁文明,迎接国际峰会''当好G20小主人,文明行为大讨论'等,本节班会课便是在这样的大背景下应运而生的。活动目标1.通过交流,引导学生认识到公共空间是大家的,营造文明的公共空间人人有责。
简介:Pulse-pairs(PP)generatedbydistancemeasuringequipment(DME)causesevereinterferencetotheL-banddigitalaeronauticalcommunicationsystems.UnlikepreviousworksthatmainlyimprovedreceiverstructureformitigatingtheDMEinterference,thispaperproposesanovelandpracticaltimedomainPPmitigationmethodwithoutchangingtheexistingreceiverstructure.Ourmethodiscomposedofthreepartsandutilizesaspecificproperty,i.e.,arelativelyfixedwaveformofDMEPP.First,thecomplex-valuedwaveformofPPisautomaticallydetectedthroughaniterativeweightedaveragemethod.Then,onthebasisofthedetectedPPwaveform,eachPPisreconstructedaccordingtoitsamplitude,position,andinitialphase,whichareestimatedthroughasparserepresentationalgorithm.Finally,thereconstructedPPsaresubtractedfromthecontaminatedsignal.Numericalexperimentsshowthatcomparedwithrecentlypublishedmethodsthebiterrorrateobtainedbyourmethodisapproximately5dBbetter,whilethecomplexityismaintainedatthesamelevel.