简介:以我们在现实生活当中处理数据库的经验来看,为了从数据库中使用限制性的信息抽取方法得到有用的数据和信息,我们有必要使用"特点子集选择"的方法(FeatureSubsetSelection).而这种方法需要从多个相关的属性当中进行多次的试验从而找到某种特定的子集.在这种情况下,如何能够找到快速的、准确的同时又是简便的选择算法变得越来越关键.这篇文章对由Dr.RobertHoltes提出的"One-R"算法进行了适当的改进,通过"Chi"氏独立性检验和拜亚(BayesDecisionTheory)公式推导出的新方法,在试验的基础上表明,这种新的算法在某种程度上比原来的"One-R"算法要准确.
简介:Thispaperpresentsaclassofr-point(r+1)st-orderA-stableone-blockmethodswithdampingattheinfinitepoint(DIAOBr,r+1).Undertheconditionsofthesameorder,A-stabili-ty,operationcount(ateachiterativestep)andstoragespacearethesameasthemethodsin[19],themethodsinthepaperimprovethestabilityinaneighborhoodattheinfinitepoint.And,byus-ingtheOOPImethod[20],itpossessesmuchfasterrateofconvergenceforsolvingsystemsofnon-linearequationsproducedbytheDIAOBr,r+1.
简介:
简介:在这份报纸,作者证明吉本斯的类似物推测为象在一个给定的方向在无穷收敛到一样的价值的一些答案的Liouville类型结果一样在N,扩大了第四个顺序Allen-Cahn方程。作者也证明priori跳并且为semilinear推进一个维的对称和刚硬结果第四份订单有更一般的非线性的椭圆形的方程。
简介:这三个结构是英语中很常用的结构。这里简要叙述这些结构的用法。
简介:Inanother250millionyears,AmericanswillbeabletodrivetoAfrica.Bythattime,Earth'ssevencontinentswillhavemerged(?)intoonesupercontinent,predictsChristopherScotese,ageologistattheUniversityofTexasatArlington.Itwon'tbethefirsttimethecontinentshavegotten-together;aboutthesameamountoftime
简介:MAGINEbeingpro-motedtomanagingdi-rectorforyourcompanyinChina.Howwouldthatmakeyoufeel?Perplexed,pleased,excited,orperhapsamixofallofthesefeel-ings?Thispossibilitymightseemprettyremoteformostyoungexpats.ThatiswhyIamsharingthisstorytohelpyouprepareforthatmomentinthefuture.
简介:<正>PresidentXiJinpingputforwardtheterm"SilkRoadEconomicBelt"onSeptember7th,2013inKazakhstanwhenheproposedinhisspeech"toforgeclosereconomicties,deepencooperationandexpanddevelopmentspaceintheEurasianregion,weshouldtakeaninnovativeapproachandjointly