学科分类
/ 16
302 个结果
  • 简介:Losslessdatahidingcanrestoretheoriginalstatusofcovermediaafterembeddedsecretdataareextracted.In2010,Wangetal.proposedalosslessdatahidingschemewhichhidessecretdatainvectorquantization(VQ)indices,buttheencodingstrategiesadoptedbytheirschemeexpandthefinalcodestream.ThispaperdesignsfourembeddingandencodingstrategiestoimproveWangetal.'sscheme.TheexperimentresultoftheproposedschemecomparedwiththatoftheWangetal.'sschemereducesthebitratesofthefinalcodestreamby4.6%andraisesthepayloadby1.09%onaverage.

  • 标签: 无损数据隐藏 编码策略 VQ 矢量量化 有效载荷 比特率
  • 简介:有单音的补品连接功能的单个索引的模型被调查。第一,连接工作,这被显示出h(·)能被一个图形的方法看。也就是说有水平轴上的适合的反应的阴谋;垂直的轴上的观察y能被用来设想连接功能。甚至当连接功能不是单音的补品时,这条图形的途径也是适用的,这被指出。注意那许多存在非参量的光滑的ers能也被用来估计h(·)。因此,经由与惩罚功能最大化协变性功能的连接功能的我花键近似在现在的工作被调查。标准的一致性被构造。小模拟被执行证实在纸建议的途径的效率。

  • 标签: 单调 量纲 图解 图形
  • 简介:Inthispaper,aWindDirectionChangeIndex(WI),whichcandescribefour-dimensionalspatiotemporalchangesoftheatmosphericcirculationobjectivelyandquantitatively,isdefinedtostudyitsevolutionandseasonalvariation.ThefirstfourmodescanbeobtainedbyEOFexpansionofthezonallyaveragedWI.ThefirstmoderevealsthebasicspatialdistributionoftheannuallyaveragedWI.Thesecondmodereflectsthequasi-harmonicpartsoftheWIdeviations.Tropical,subtropicalandextratropicalmonsoonareascanbeclearlyreflectedbythismode.Thethirdmodereflectsthenon-harmonicpartsoftheWIdeviations.Itshowstheso-calledFebruaryreverseinstratosphericatmosphereaswellastheasymmetricseasonalchangesfromspringtofallandfromfalltospringduetoboththeland-seadistributioncontrastbetweentheNorthernandSouthernHemispheresandthenonlineareffectofatmosphericandoceanfluids.Thefourthmoderevealsthenorthwardadvancingoftheglobalreversedwindfieldsfromspringtosummerandtheirsouthwardwithdrawalfromsummertoautumn.

  • 标签: 弯屈方向变化索引(WI ) 实验直角的功能(文件结束) 四维的时空变化 2 月同温层的颠倒
  • 简介:Theecologicalcivilizationhealthquotientindexisputforwardcombinedwiththe"healthquotient"concepttoevaluatethehealthstateofecologicalcivilization.Thispaperhasconstructedtheindexsystemofecologicalcivilizationhealthquotientandquantitativelygoteachindexproportionofthesystemwithapplicationofanalytichierarchyprocess(AHP).Thevalueofecologicalcivilizationhealthquotientindexiscalculatedwiththefuzzyanalysismethod.Thehealthstateofecologicalcivilizationisjudgedbythepositiveandnegativeecologicalcivilizationhealthquotientindex.Thispaperhasselectedthedatafrom2009to2013tocalculatethewholehealthstatusofecologicalcivilizationofourcountry.Theconclusionisthatourcountryhadtransformedfromtheunhealthystatus(ecologicalcivilizationhealthquotientindexis-0.133)intothesub-healthstate(ecologicalcivilizationhealthquotientindexis0.191,butitsinternalrulelayersarenegative)duringthefiveyears.WeshouldconstructtheecologicalcivilizationmainlyfromtwoaspectsofresourceconservationandecologicalbehaviorcivilizationinthefuturetobuildabeautifulChina.

  • 标签: ECOLOGICAL CIVILIZATION HEALTH QUOTIENT INDEX of
  • 简介:作为绝对错误方法的一种选择,例如最不方形、最少的绝对偏差评价,一个产品亲戚错误评价为一个趋于增加的单个索引回归模型被建议。在模型的回归系数经由一个二阶段的过程被估计,他们象一致性和规度那样的统计性质被学习。包括模拟和一个身体脂肪例子的数字研究证明建议方法表现很好。

  • 标签: Asymptotic 性质 最少的产品亲戚错误 相对错误 挑选索引模型
  • 简介:AfieldexperimentwasconductedtostudytheeffectsofPb,Cd,Cu,ZnandAscoexistinginredsoilongrowthofrice(OryzasativaL.)mungbean(Vignarabiata(Linn.)Wilczek),alfalfa(MedicagosativaL.),Slashpine(PinuselliottiiEngelm.)andaspen(PopulusL.).Resultsshowedthatrice,mungbeanandalfalfaweresignificantlyinfluencedbycombinedpoollutionoftheheavymetals,thecontentsofPb,CdandAsinricegrainsgreatlyexceededtheNationalStandardsforFoodHygieneofChina.Heavymetalsatahighconcentrationseriouslyretardedgrowthofmungbeanandalfalfa,butnotsoobviouslywithslashpineandaspen.Thecompositeindexissuggestedforevaluatingtherelativityofcombinedpollutionwithheavymetalsinsoil.

  • 标签: 重金属污染 混合污染 矿业 红壤 植物生长
  • 简介:ByuseoftheKeldyshnn-equilibriumGreen's-functionmethods,thethirdharmonicsusceptibilitiesoftwopolyanilinefamilies,PANI-HCl巨PANI-H3PO4,arccalculated[x^(3)(ω)≈10^-12esu].Itwasfoundthatthethirdharmonicsusceptibilityofpolyanilinestronglydependsonthedelocalizationoftheelectrons.Therefractiveindicesn(λ=589nm)ofPANI-HClandPANI-H3PO4arecalculatedbyuseofthreecommonmethods(theLorentz-Lorentztheoreticalmodel,theGladstone-DalegroupcontributionandtheVogelgroupcorrelation)basedongroupcontributionstomolarrefraction.Thecalculatenvaluesarevariedfrom1.31to1.42forPANI-HCland1.36to1.45forPANI-H3PO4.

  • 标签: 非线性光敏感性 折射率 电子偏移 聚合物
  • 简介:

  • 标签:
  • 简介:Thedynamicsindexes,playinganimportantroleinthecerebralcirculation,willbechangedsignificantlycomparedwiththeirnormalrangeinmanycerebrovasculardisease.ThegeometricalparametersofcerebrovascularmaybedetectedbyDSAorMRAscan,butthehemodynamicparameters,suchas,bloodflow,arteryresistanceandcompliancemustbecalculatedbybuildinghemodynamicsmodel.Thecerebralcircularsystemthathasfourentrancesforbloodflow(twocarotidandtwovertebralarteries)andthreecommunicatingarteriesismuchdifferentfromthesystematicststemwhichhasonlyoneentrance,ic.,theaortic.Thepurposeofthisstudyistosetupahemodynamicsmodelwithlumpedparameterstodescribethecerebralcirculation.Fromthismodel,wegetitsgoverningequationsandpresentanewmethodtocalculatethehemodynamicsindexesinclinicalapplication.

  • 标签: CEREBROVASCULAR WILLIS CIRCULATION HEMODYNAMICS model lumped
  • 简介:在北方亚洲气旋(NAC)之间的关系活动和南部的环形的模式(SAM)在这研究被记录。NAC索引(NACI)的定义在诺思亚洲基于大气的相对涡度。分析产出在以前的冬季之间的重要积极关联南部的环形的模式索引(SAMI)和春天NACI在内部年度可变性,与0.51的一个关联系数在期间19482000。NAC相关、SAM相关的大气的一般发行量可变性的分析表明如此的一种关系。学习进一步表明当冬季SAM变得强壮时,在热带西方的太平洋的大气的传送对流将加强的春季和本地哈德利发行量将被加强。作为结果,在华南上的反常减退运动使温度坡度在底层加强了并且在高水平加强喷气,哪个对NAC的发展有益活动。

  • 标签: 南亚 飓风 南环模式 大气循环
  • 简介:Withthearrivaloftheeraofpersonalautoconsumption,residentsareenjoyingtheconvenienceoftravel;however,problemssuchasenvironmentalprotection,transportation,purchasingrestrictionareplaguingconsumersatthesametime.Asaneffectivealternativetoconventionalvehicle,electricvehicleinrecentyearshasbeenwidelyconcernedduetoitscharacteristicsofenergysavingandenvironmentalprotection.ToidentifythekeyinfluentialfactorsinthedevelopmentofEVindustryinChinaisconducivetoformulatingreasonableindustrialdevelopmentstrategyandmeetingmarketdemandofconsumers.Inthispaper,thekeyfactorsinthedevelopmentofEVindustryareobtainedbyanalyzingBaiduIndexineachtimeperiod.

  • 标签: 汽车产业 电动汽车 影响因素 百度 汽车消费 环境保护