简介:Thispaperinvestigatesthemathematicfeaturesofnon-linearmodelsanddiscussestheprocessingwayofnon-linearfactorswhichcontributestothenon-linearityofanonlinearmodel.Onthebasisoftheerrordefinition,thispaperputsforwardanewadjustmentcriterion,SGPE.Last,thispaperinvestigatesthesolutionofanon-linearregressionmodelinthenon-linearmodelspaceandmakesthecomparisonbetweentheestimatedvaluesinnon-linearmodelspaceandthoseinlinearmodelspace.
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简介:全部的推迟的微粒(TSP)样品沿着Qingdao的海岸在三个地点被收集,中国,在前并且在在2002年3月的主要尘暴期间。为比较,PM_(10)(有空气动力学的直径的微粒物质不到10μm)样品被收集三个地点赎回。词法观察和体积和单个粒子的组合分析被使用扫描与为TSP和PM_(10)的散X光检查系统(SEM/EDX)取样的一个精力装备的电子显微镜学执行。结果证明形态学的不同类型的粒子有类似的形态学的不同元素的作文,而是粒子总是没为非灰尘样品有一样的元素的作文。非灰尘粒子的Themorphology和作文在不同地点是不同的。分数维、球形的粒子为非灰尘样品主要在粗粒级存在,当时在好模式(<10μm)有絮状物,一起结队并且包含外壳的元素的好粒子形成。与非灰尘粒子相比,尘粒以形态学,颗粒大小和作文是更同类的。有andwell分布式的尺寸在灰尘样品统治了的不规则的形状的粒子,包含象Mg那样的外壳的元素,艾尔,Si,Ca,Fe,等等。高硫内容显示了那同类并且多相反应在Qingdao的特定的环境发生在尘粒的表面上。
简介:Settlingvelocityisafundamentalparameterinsedimenttransportdynamics.ForuniformPar-ticles,thereareabundantformulasforcalculationoftheirsettlingvelocities.Butinnaturalfields,sedi-mentconsistsofnon-uniformparticles.Theinteractionamongparticlesiscomplexandshouldnotbeneg-lected.Inthispaper,basedontheanalysisofsettlingmechanismofnon-cohesiveandnon-uniformparti-cles,atheoreticalmodeltodescribesettlingmechanismisproposed.Besidessuspensionconcentrationandupwardturbulentflowcausedbyotherparticles,collisionamongparticlesisanothermainfactorinflu-encingsettlingvelocity.Byintroducingthecollisiontheory,equationsoffallvelocitybeforecollision,colli-sionprobability,andfallvelocityaftercollisionareestablished.Finally,aformulausedtocalculatetheset-tlingvelocityofnon-cohesiveparticleswithwidegraingradationispresented,whichagreeswellwiththeexperimentaldata.
简介:Inthisarticle,itispointedoutthattheinformationnon-modifiabilityandinformation“fidelity”involvedin“informationdeterminacy”isamomentousrevolutioninepistemologicalconception.Byeliminatingtheconstrictionofquantitativestability,thereexistpeculiarinformationandperiodicityundernonlinearinstability.ThecommensurabilitybyWengWenbomaybeexplainedbyapplyingspecialcharactersofpeculiarinformation.Onevolutionofsubstance,thegeneralrulesforquantitativeanalysescannotbeextendedintoprocessofpeculiarinformation.Therefore,thecontemporaryscienceshavenotresolvedsomeimportantproblemsinevolutionofsubstancesuchas“time”,peculiarity,non-inertialsystem,andfabricatedinformationinquantitativeanalyses.Thenaturalcharactersandnon-modifiabilityofinformationhaveessentiallyprovedthatitisanepistemologicalmisunderstandingtoconsidertheinformationanalysisinmodern“informationscience”thesameasquantitativeanalysisinthecontemporarysciences.Thatis,“information”cannotbeidenticalto“quantity”.
简介:THECHANGESANDCLIMATICJUMPSINFERREDFROMTHEAGRICULTURALDRYNESSANDWETNESSINTHECHANGJIANG-HUAIHEVALLEYFORTHELAST500YEARSXueHeng(薛...
简介:Thedeep-seafloorimagesareacquiredundernon-uniformillumination,theeffectsofwhichbringupmanydifficultiesforimagesegmentation.Thepapercomparesthreemethodsofremovingnon-uniformilluminationeffects.Theeffectivenessandrobustnessareevaluatedonthreetestimageswithhigh-,moderate-andlow-densitygrains,respectively.Theresultsshowthatlocalfilteringalgorithmdoesnotremovethenon-uniformilluminationeffectscompletely.Theimagesubtractingalgorithmwilllosesomeofthedynamicrangeoftheoriginaldata.Theenhancedimagestretchingalgorithmisthemosteffectiveone.
简介:Amethodtocalculatethestationaryrandomresponseofanon-classicallydampedstructureisproposedthatfeaturesclearly-definedphysicalmeaningandsimpleexpression.Themethodisdevelopedinthetrequencydomain.Theexpressionoftheproposedmethodconsistsofthreeterms,i.e.,modalvelocityresponse,modaldisplacementresponse,andcoupled(betweenmodalvelocityandmodaldisplacementresponse).Numericalresultsfromtheparametricstudyandthreeexamplestructuresrevealthatthemodalvelocityresponsetermandthecoupledtermareimportanttostructuralresponseestimatesonlyforadynamicsystemwithatunedmassdamper.Intypicalcases,themodaldisplacementtermcanprovideresponseestimateswithsatisfactoryaccuracybyitself,sothatthemodalvelocitytermandcoupledtermmaybeignoredwithoutlossofaccuracy.Thisisusedtosimplifvtheresponsecomputationofnon-classicallydampedstructures.Forthewhitenoiseexcitation,threemodalcorrelationcoefficientsmclosedformarederived.Toconsiderthemodalvelocityresponsetermandthecoupledterm,asimplifiedapproximationbasedonwhitenoiseexcitationisdevelopedforthecasewhenthemodalvelocityresponseisimportanttothestructuralresponses.Numericalresultsshowthattheapproximateexpressionbasedonwhitenoiseexcitationcanprovidestructuralresponseswithsatisfactoryaccuracy.
简介:IntroductionThrough20-oddyears’observationandstudyafterthe1976Tangshangreatearthquake,theseismo-electromagneticradiationprec...
简介:Discriminationsinalocalchemical,fluidal,mechanicalandthermalprocessesinashearzonewillleadtometallogenicdifferentiationinalocalsection.Thispaper,basedonthegeneralgeologicalsettingoftheShibangougolddepositinXixia,Henan,dealswithpetrologicalandpetrochemicalsamplesofalteredrocksinthemetallogenicsectionandofmylonitesinthenon-metallogenicsectionofaselectedshearzone.Thediscriminationsinfluid-rockinteractionandpetrologicalmassbalancebetweenalteredrocksneartheorebodyandmylonitesintheshearzonearediscussedaswell.Theresultsshowthatthepetrologicalvolumeofalteredrocksinthemetallogenicsectionoftheshearzoneisalmostalwaysdilatantandthemylonitevolumeinthenon-metallogenicsectionisalmostalwayslost.Majorelementsinalteredrocksfromthemetallogenicsectionandinmylonitesfromthenon-metallogenicsectionalwaysshowatendencyofbeingenrichedanddepleted,respectively.Fluid-rockratiosinthemylonites(Nu=93.68-468.40)arelargerthanthoseofthealteredrocks(NC(Ⅳ)^s=36.11-216.67).Thegainandlossofmajorandtraceelementsfromthealteredrocksandmylonitesintheshearzoneareacompositeprocesstobeimportedandexportedbypercolatingfluidsaswellasofthelossanddilatancyofrockvolume.
简介:AnalgorithmforcomputationofcloudmotionwindshasbeendevelopedattheNationalSatelliteMeteorologicalCenterinChina.Since1997,ithasbeenappliedtocalculatethecloudmotionwindsfora1.25lat.×1.25long.meshoverthenorthwestPacificregionwiththesatellitedatafromGMS-5.Thedevelopmentofthetropicalcyclonesisstudied.Itshowsthatthetropicalcycloneisusuallyintriguedbythewesterlyjetstreamsattheupperlevelsofthetroposphere,whichmaybecausedbymid-latitudetroughswellextendingintothetropics.Duringtheprimeseasonofsummer,thewesterlyflowingequatorwardoftheTUTTmayalsobeacauseforthegenerationoftyphoons.
简介:AerosolsampleswerecollectedonboardtheresearchvesselXuelongduringtheFifteenthChineseAntarcticResearchExpedition(CHINAREXV)inNovember1998-April1999andtheFirstChineseArcticResearchExpeditioninJuly-September1999.TheareastraversedbytheexpeditionarycruisesincludetheArcticOcean,thewesternNorthPacificOceanandtheeasternIndianOcean,covering75°N-69°Sand75°E-133°W.AerosolsampleswerealsotakenattheChineseZhongshanStationinEastAntarcticaduringtheCHINAREXV.Analysisofthesamplesyieldedconcentrationsofnon-sea-saltsulfateandothersolublechemicalspeciesinthemarineboundarylayer.Thedatasuggestthatthechemicalcompositionofthemarineaerosolsisinfluencedbythreemajorsources:continentalairmasses,primaryoceanicemissions,andsecondarymarineaerosolsoriginatedfromoceanicemissions.Theresultsshowthat,awingtostronganthropogenicsulfuremissionsfromtheAsiancontinent,non-sea-saltsulfateconcentrationsintheNorthernHemisphere(thewesternNorthPacific)marineaerosolaresignificantlyhigherthanthoseintheSouthernHemisphere(theeasternIndianOcean).Aerosolnon-sea-saltsulfateconcentrationsappeartobeinverselycorrelatedwithaerosolnon-sea-saltchloridewhichshowssignificantlynegativevalues,indicatingthelossofchloridebyseasalts,inmostaerosolsamples.SincegaseousHClmaybeinvolvedinchemicalreactionsthatdepleteatmosphericozoneinthemarineboundarylayer(MBL),highlevelsofacidicnon-sea-salt-sulfatereleasedbyhumanactivitiesinthelowandmid-latitudesoftheNorthernHemispheremaybecomeanimportantpotentialcontributortothelossofatmosphericozoneintheMBL.