简介:也许广大学生朋友会问:什么是E3大展?主要内容是什么?下面做个简单的介绍!
简介:近日,京东方发布了一款内置独立显卡的迅驰笔记本电脑新品——京东方E3500。该款笔记本电脑充分满足了用户在工作和娱乐上的双重需求,并且在配置和价格上优势明显,成为了当前市场中最具代表性也最具性价比优势的轻薄型独立显卡笔记本电脑。
简介:Althoughk-anonymityisagoodwayofpublishingmicrodataforresearchpurposes,itcannotresistseveralcommonattacks,suchasattributedisclosureandthesimilarityattack.Toresisttheseattacks,manyrefinementsofk-anonymityhavebeenproposedwitht-closenessbeingoneofthestrictestprivacymodels.Whilemostexistingt-closenessmodelsaddressthecaseinwhichtheoriginaldatahaveonlyonesinglesensitiveattribute,datawithmultiplesensitiveattributesaremorecommoninpractice.Inthispaper,wecoverthisgapwithtwoproposedalgorithmsformultiplesensitiveattributesandmakethepublisheddatasatisfyt-closeness.Basedontheobservationthatthevaluesofthesensitiveattributesinanyequivalenceclassmustbeasspreadaspossibleovertheentiredatatomakethepublisheddatasatisfyt-closeness,bothofthealgorithmsusedifferentmethodstopartitionrecordsintogroupsintermsofsensitiveattributes.Oneusesaclusteringmethod,whiletheotherleveragestheprincipalcomponentanalysis.Then,accordingtothesimilarityofquasi-identifierattributes,recordsareselectedfromdifferentgroupstoconstructanequivalenceclass,whichwillreducethelossofinformationasmuchaspossibleduringanonymization.Ourproposedalgorithmsareevaluatedusingarealdataset.Theresultsshowthattheaveragespeedofthefirstproposedalgorithmisslowerthanthatofthesecondproposedalgorithmbuttheformercanpreservemoreoriginalinformation.Inaddition,comparedwithrelatedapproaches,bothproposedalgorithmscanachievestrongerprotectionofprivacyandreduceless.
简介:如今.联想的X系列余温未了.Z系列正值火热.而11月.公开售价7999的Thinkpad全新R51e上市立刻为中低端笔记本市场带来了前所未有的冲击。作为R50e的升级型号,ThinkPadR51e在外形方面依旧沿用了R50e的经典全黑造型外观,CPU全面升级为更高主频.芯片组由Intel855GM提高到ATiRADEONXPRESS200M。均采用Type3PC卡1、2个USB2.0、以太网.串口.Modern接口等。其中一款R51e-18432XC采用Dothan核心赛扬1.5GHz处理器.14.1XGALCD显示器.40GB(5400转)硬盘.256MB内存.DVD光驱,预装WindowsXP家庭版.售价仅为7999元.并且赠送电脑包一个,比起前代产品ThinkPadR50e可谓升级又降价,性价比非凡。