简介：Definethedensityd(G)ofagraphGase(G)/v(G)Apolynomialalgorithmforfindingthedensestsubgraphofagraphisprovided.Someresultsrelatedtothedensityofthedensestsubgraphofagraphareobtainedaswell.

简介：Leadisoneofthepoisonoustraceelementforhumanbody.Itisimportanttofindawayformeasuringcontentoflead.Deterninationofleadbyelectrochemistryisoneofamethod[1].Inthispaper,leadisdeterminedbysingle-sweeppolarography.Theabsorptionbehaviorofmeso-tetra(4-sulfonylphenyl)porphyrin(H2TPPS4)complexwithleadionhasalsobeenstudied.InNa2B4O7-NaOHsolutionwithpH=l0.5,thereductionpeaksoftheligandareP1(Ep1=-0.38V),P2(Ep2=-1.04V),whichpotentialsareobtainedvs.S.C.E.Whenleadionhasbeenaddedintoabovesolution.ThepeakcurrentofP1andP2decrease,andanewreductionpeakP3(Ep3=-1.10V)appears.ItshowsthattheTPPS4-Pb(Ⅱ)complexforms,andthismethodcanbeappliedtostudythecomplex.

简介：Ifonewantstosucceedinhiscareer,hemustlearntomakeapracticalplan/aim.Butdifferentkindsofresultslikedisadvantagesandadvantagesalwaystroubleus,putusatalossanddon'tknowhowtosolveit.Atthistimeweneedsincereandtrueopinionsfromallaroundusso

简介：Amethodforrapiddeterminationofsiliconcontentinricewasintroduced.Thereliabilityofthismethodwasverifiedbyusingarecombinantinbredline(RIL)populationofricecrossZhenshan97B/Milyang46.Twohundredandforty-nineRILsweretransplantedintworeplications.Simplecorrelationcoefficientsonthesiliconcontentinthehull,flagleafandsteminricebetweenduplicatesamplesof498ricematerialswere0.97954,0.97026and0.98848,respectively.Tenrepresentativesampleswereselectedformeasurementusingthehigh-temperaturealkalinefusionmethod.Simplecorrelationcoefficientbetweenthesiliconcontentsdeterminedbythehigh-temperaturealkalinefusionmethodandbythepresentmethodis0.9993.

简介：Thedeterminationofthesoundpowerofasourceissimpleinareverberationchamber,butusuallylowervalvesareobtainedatlowfrequenciesthanthefree-spacevalue.Itisshownthatthesoundpowerdeterminedinareverberationchamberdependsnotonlyonitsfree-spacepower,butalsoonthepositionsofthesourceandthereveiver,aswellasthewaythemeasurementsaremadeandaveraged.Exactandstatisticalformulasarederivedtoaccountforthesefactors.Theresultsexplainthediscrepancyandagreewellwithearlierexperiments.Basedonthetheory,parcticabletechniquesofsoundpowerdetermina-tionarepropesedandcorrectpowerformulaspresented.

简介：克服缺点传统多微笑调查并且数据处理，一个新方法为即时高度的精确决心被介绍在多，由GPS高度和举的混合的横梁变换器发信号。信号需要被态度修正首先改正到变换器中心的Beforesignal混合，GPS高度和举。第二，GPS高度需要被举支票和修正本身检查并且修改。黄油价值和快速傅里叶变换(快Fourier转变)在信号混合被使用。最后，快速傅里叶变换被认为在信号处理适当。新方法高效地克服传统的方法的缺点，并且这是由MBS的证明的井(多微笑深测术的系统)实验。

简介：Thispaperfirstdevelopstheapproachestodeterminethegeopotentialofthelocalmeansealevel,andtheninvestigatestheoffsetofthe1985verticaldatumsurfacedefinedbythemeansealevelofYellowSeaattheDagangTideGaugeinQingdaocityusingthedevelopedapproachesandGPS/levelingdata.Itshowsthatthegeopotentialofthelocalmeansealevelatthetidegaugeisequalto62636853.5±0.2m2*s-2andthatthe1985verticaldatumsurfaceis24.6±5.4cmabovethegeoidrealizedbythegeopotentialW0=62636856.0±0.5m2*s-2.

简介：Fracturetoughnessisoneofthecrucialmechanicalpropertiesofbrittlematerialssuchasglassesandceramicswhichdemonstratecatastrophicfailuremodes.Conventionalstandardizedtestingmethodsadoptedforfracturetoughnessdeterminationrequirelargespecimenstosatisfytheplanestraincondition.Asforsmallspecimens,indentationisapopular,sometimesexclusivetestingmodetodeterminefracturetoughnessforitcanbeperformedonasmallflatareaofthespecimensurface.Thisreviewfocusesonthedevelopmentofindentationfracturetheoriesandtherepresentativetestingmethods.Crackingpatterndependentonindentergeometryandmaterialpropertyplaysanimportantroleinmodeling,andisthemainreasonforthediversityofindentationfracturetheoriesandtestingmethods.Alongwiththesimplicityofspecimenrequirementisthecomplexityofmodelingandanalysiswhichaccountsforthesemi-empiricalfeaturesofindentationfracturetests.Someunresolvedissuesshapingthegapbetweenindentationfracturetestsandstandardizationarealsodiscussed.更多还原

简介：Cashposition,heldbymutualfundwithpurposetosatisfyinvestors′redemption,willinevitablygeneratecertainamountofcost.Inthispaper,thetotalcostcausedbycashpositionisdividedintoopportunitycostandshortagecost,andamodelisconstructedtodescribetherelationshipbetweentotalcostandcashpositionalongwithinvestors′purchaseandredemption,fromwhichtheformulaofoptimalcashpositionisdeduced.Finally,theadjustmentofoptimalcashpositionindifferentmarketsituationsisdiscussed.

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简介：决定山Qomolangma的测地学的高度是在2005Qomolangma高度调查的重要使命之一。在调查有三个GPS网络：山顶点上的地区性的GPS外壳的变丑网络，测地学的GPS控制网络，和GPS测量。数据收集并且处理被介绍。处理策略和合理测地学的高度的最后的数据相当基于小心的数据分析被决定。

简介：我们建议从微波测量Josephson隧道连接的精力松驰时间的一个非静止的方法提高了逃跑现象。与以前的方法相比，我们的方法拥有简单、精确的特征。而且，决定了精力松驰时间，我们能进一步由改变微波力量获得在微波来源和连接之间的联合力量。

简介：挑战性的微型卫星收费载重的精确轨道决心(捣烂)卫星基于位置和在武汉大学里被开发的航行数据分析家(熊猫)软件被做，用从白天126～131的年2002的机载的GPS数据。Theorbit精确性被从GFZprocessed以后科学轨道(PSO)分析差别估计，GPS搬运人和伪范围数据剩余和变化的卫星激光(SLR)剩余。

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简介：SmallX-rayScattering(SAXS)experimentusingSynchrotronRadiationasX-raysourcewasusedtodeterminetheaveragewallthicknessofmesoporoussilicaprepardbycondensationoftetraethylorthosilicate(TEOS)usingnon-ionicalkylpolyethyleneoxide(AEO9)surfactantastemplates.Theresultsagreedwiththatofhigh-resolutionTEM(HRTEM)measurement.

简介：TherewasasignificantcatalyticeffectoftraceGd(III)ionsontheoxidativereactionofpotassiumpersulfatewithSaffronTintheaceticacid–sodiumacetatebuffersolution.Thus,acatalytickineticfluorimetrymethodforthedeterminationoftraceGd(III)ionswasestablished.Thefactorssuchasacidity,concentrationofreagents,reactiontime,andtemperatureaswellasinfluenceofcoexistingionswerediscussed.Theoptimumreactionconditionswereestablished.Theapparentrateconstantandapparentactivationenergyofthereactionweredetermined.Thelinearrangeis0.02–0.10lgáml-1,andthedetectionlimitis7.27910-4lgáml-1.ThismethodwasusedforthedeterminationofgadoliniuminthesamplesoflanthanumacetatewithRSDof0.9%–3.1%.