简介:Losslessdatahidingcanrestoretheoriginalstatusofcovermediaafterembeddedsecretdataareextracted.In2010,Wangetal.proposedalosslessdatahidingschemewhichhidessecretdatainvectorquantization(VQ)indices,buttheencodingstrategiesadoptedbytheirschemeexpandthefinalcodestream.ThispaperdesignsfourembeddingandencodingstrategiestoimproveWangetal.'sscheme.TheexperimentresultoftheproposedschemecomparedwiththatoftheWangetal.'sschemereducesthebitratesofthefinalcodestreamby4.6%andraisesthepayloadby1.09%onaverage.
简介:Inthispaper,aWindDirectionChangeIndex(WI),whichcandescribefour-dimensionalspatiotemporalchangesoftheatmosphericcirculationobjectivelyandquantitatively,isdefinedtostudyitsevolutionandseasonalvariation.ThefirstfourmodescanbeobtainedbyEOFexpansionofthezonallyaveragedWI.ThefirstmoderevealsthebasicspatialdistributionoftheannuallyaveragedWI.Thesecondmodereflectsthequasi-harmonicpartsoftheWIdeviations.Tropical,subtropicalandextratropicalmonsoonareascanbeclearlyreflectedbythismode.Thethirdmodereflectsthenon-harmonicpartsoftheWIdeviations.Itshowstheso-calledFebruaryreverseinstratosphericatmosphereaswellastheasymmetricseasonalchangesfromspringtofallandfromfalltospringduetoboththeland-seadistributioncontrastbetweentheNorthernandSouthernHemispheresandthenonlineareffectofatmosphericandoceanfluids.Thefourthmoderevealsthenorthwardadvancingoftheglobalreversedwindfieldsfromspringtosummerandtheirsouthwardwithdrawalfromsummertoautumn.
简介:Theecologicalcivilizationhealthquotientindexisputforwardcombinedwiththe"healthquotient"concepttoevaluatethehealthstateofecologicalcivilization.Thispaperhasconstructedtheindexsystemofecologicalcivilizationhealthquotientandquantitativelygoteachindexproportionofthesystemwithapplicationofanalytichierarchyprocess(AHP).Thevalueofecologicalcivilizationhealthquotientindexiscalculatedwiththefuzzyanalysismethod.Thehealthstateofecologicalcivilizationisjudgedbythepositiveandnegativeecologicalcivilizationhealthquotientindex.Thispaperhasselectedthedatafrom2009to2013tocalculatethewholehealthstatusofecologicalcivilizationofourcountry.Theconclusionisthatourcountryhadtransformedfromtheunhealthystatus(ecologicalcivilizationhealthquotientindexis-0.133)intothesub-healthstate(ecologicalcivilizationhealthquotientindexis0.191,butitsinternalrulelayersarenegative)duringthefiveyears.WeshouldconstructtheecologicalcivilizationmainlyfromtwoaspectsofresourceconservationandecologicalbehaviorcivilizationinthefuturetobuildabeautifulChina.
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。
简介:AfieldexperimentwasconductedtostudytheeffectsofPb,Cd,Cu,ZnandAscoexistinginredsoilongrowthofrice(OryzasativaL.)mungbean(Vignarabiata(Linn.)Wilczek),alfalfa(MedicagosativaL.),Slashpine(PinuselliottiiEngelm.)andaspen(PopulusL.).Resultsshowedthatrice,mungbeanandalfalfaweresignificantlyinfluencedbycombinedpoollutionoftheheavymetals,thecontentsofPb,CdandAsinricegrainsgreatlyexceededtheNationalStandardsforFoodHygieneofChina.Heavymetalsatahighconcentrationseriouslyretardedgrowthofmungbeanandalfalfa,butnotsoobviouslywithslashpineandaspen.Thecompositeindexissuggestedforevaluatingtherelativityofcombinedpollutionwithheavymetalsinsoil.
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.
简介:Thedynamicsindexes,playinganimportantroleinthecerebralcirculation,willbechangedsignificantlycomparedwiththeirnormalrangeinmanycerebrovasculardisease.ThegeometricalparametersofcerebrovascularmaybedetectedbyDSAorMRAscan,butthehemodynamicparameters,suchas,bloodflow,arteryresistanceandcompliancemustbecalculatedbybuildinghemodynamicsmodel.Thecerebralcircularsystemthathasfourentrancesforbloodflow(twocarotidandtwovertebralarteries)andthreecommunicatingarteriesismuchdifferentfromthesystematicststemwhichhasonlyoneentrance,ic.,theaortic.Thepurposeofthisstudyistosetupahemodynamicsmodelwithlumpedparameterstodescribethecerebralcirculation.Fromthismodel,wegetitsgoverningequationsandpresentanewmethodtocalculatethehemodynamicsindexesinclinicalapplication.
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。
简介:Withthearrivaloftheeraofpersonalautoconsumption,residentsareenjoyingtheconvenienceoftravel;however,problemssuchasenvironmentalprotection,transportation,purchasingrestrictionareplaguingconsumersatthesametime.Asaneffectivealternativetoconventionalvehicle,electricvehicleinrecentyearshasbeenwidelyconcernedduetoitscharacteristicsofenergysavingandenvironmentalprotection.ToidentifythekeyinfluentialfactorsinthedevelopmentofEVindustryinChinaisconducivetoformulatingreasonableindustrialdevelopmentstrategyandmeetingmarketdemandofconsumers.Inthispaper,thekeyfactorsinthedevelopmentofEVindustryareobtainedbyanalyzingBaiduIndexineachtimeperiod.