简介:目的探讨p27^kipl、p53蛋白在胃癌中的表达关系和预后意义。方法用免疫组化法同步检测20例胃良性病变标本及80例胃癌组织中pZ7、p53的表达。结果80例胃癌中p27蛋白阳性率为41,25%(33/80),低于胃良性病变标本100%(20/20),p53阳性率在胃癌中为43.75%(35/80),而在胃良性病变标本中为0。胃癌p27阳性组的p53阳性率为66.67%,显著高于p27阴性组(P<0.05),p27与p53呈正相关,p27与预后弱相关,p53与预后密切相关。结论p27、p53相互作用,对胃癌发生发展起重要作用;p27表达愈强,p53表达愈弱,说明预后较好,反之则差,联合检测pZ7、p53可辅助胃癌诊断,估计预后,选择治疗方案。
简介:凭借着百分之二十左右的年化收益、保本保息且无投资门槛,P2P理财平台几乎令人难以抗拒。然而,随着P2P行业的高速发展,其隐藏的风险逐渐显露出来。今年上半年,爆出来多家P2P平台跑路的消息。
简介:Multimediastreamingservedthroughpeer-to-peer(P2P)networksisboomingnowadays.However,theend-to-endstreamingqualityisgenerallyunstableduetothevariabilityofthestateofserve-peers.Ontheotherhand,proxycachingisabandwidth-efficientschemeforstreamingovertheInternet,whereasitisasubstantiallyexpensivemethodneedingdedicatedpowerfulproxyservers.Inthispaper,wepresentaP2PcooperativestreamingarchitecturecombinedwiththeadvantagesofbothP2Pnetworksandmultimediaproxycachingtechniquestoimprovethestreamingqualityofparticipatingclients.Inthisframe-work,aclientwillsimultaneouslyretrievecontentsfromtheserverandotherpeersthathaveviewedandcachedthesametitlebefore.Inthemeantime,theclientwillalsoselectivelycachetheaggregatedvideocontentsoastoservestillfutureclients.Theassociateprotocoltofacilitatethemulti-pathstreamingandadistributedutility-basedpartialcachingschemearedetailedlydis-cussed.Wedemonstratetheeffectivenessofthisproposedarchitecturethroughextensivesimulationexperimentsonlarge,Inter-net-liketopologies.
简介:SomecharacterizationsoftheconditionalexpectationoperatorsonLebesgue-BochnerspacesL_p(μ,X)aregiven,where1≤p<∞,p≠2.AlsoanexampleisgiventoshowthatthecharacterizationsoftheconditionalexpectationoperatorsonL_p(μ,X)aredifferentfromthatonL_p(μ)_zFinally,arepresentationoftheconstant-preservingcontractiveprojectiononspacesL_p(μ,X)isgotwhen0<p<1.
简介:互联网正承载着越来越多的多媒体传输任务,同一个多媒体数据大多在一个有着共同兴趣的群体里传输,在传输过程中这些数据往往需要占用大量的网络资源。IP组播是传统的组通讯实现方案,它能够避免在链路上传输重复报文,节省网络带宽,实现高效的组通讯传输。但是由于市场和运营方面等方面的原因,至今互联网仍然没有普及支持IP组播的路由器。