简介:Epicentral distribution in 1994Pei-ShanCHEN(陈培善)(InstituteofGeophysics,StateSeismologicalBureau,Beijing100081,China)Pei-ShanC...
简介:The distribution of methane in the Tokyo-wanZangJiaye(ReceivedAugust8,1995;acceptedSeptember2,1995)Abstract:Elevenstationswer...
简介:Anewmethodoftreatingmaximumwaveheightasarandomvariableinreliabilityanalysisofbreakwatercaissonsisproposed.Themaximumwaveheightisexpressedasthesignificantwaveheightmultipliedbytheso-calledwaveheightratio.Theproposedwaveheightratioisatypeoftransferfunctionfromthesignificantwaveheighttothemaximumwaveheight.Undertheconditionofabreakingwave,theratioisintrinsicallynonlinear.Therefore,theprobabilitydensityfunctionforthe
简介:Thispaperdeducedamoregeneralerrordistribution,thep-thpow-ernormdistribution,basedonthefoundationalpropertiesofrandomerrors.
简介:Slipdistributionofthe1979ImperialValley,1989LomaPrieta,1992Landers,1994Northridge,and1995Kobeearthquakeshowsapiece-wiseGutenberg-Richter'slaw.Forsmallslips,theb-valueisnearto1;whileforlargeslips,theb-valueislargerthan1.
简介:ThepresentpaperreportsthespeciescompositionandquantitativedistributionoftheEuphausiacea.ThematerialsforstudyweretakenfromthewesternTaiwanStrait(22°22.9′~25°43.0′N;116°40.0′~120°30.0′E)bytheThirdInstituteofOceanography,StateOceanicAdministrationduringtheinvestigationsinMay,August,November,1984andFebruary,1985.
简介:Thisarticlepresentsanapplicationofaproceduretomodifytheintensitydistributionbyassessingthereliability.Therearetwopotentialpossibilitiesthatmayinfluencetheintensitydistribution:(1)Fortheinterpolationerror,wegenerateameasuredgridacrossthecalculationregion.Whenthepointtostationspacingis\5km,weconsidertheresultsprecise;however,somepointshavelessprecisionbecausethesearefartherfromthecorrespondingstations.Whenthespacingisbetween5and50km,weconsidertheresultsimpreciseanddefineareliabilityfactorthatcorrelateswiththedistance.(2)Somerecordsmayhaveerrorsthatresultfromlocalsiteconditions,equipmentproblems,orsomedisturbancesuchaslightningstroke,whichwillleadtosomegridpointshavinganincorrectintensity.Weregresstheattenuationrelationforsiteswithabnormalintensitiesandconsidertheresultstobeaccuratewhenthestandarddeviation(STD)is\randinaccuratewhentheSTDis[2r.WethendefineareliabilityfactortocorrelatewithSTDbetweenrand2r,suchthattheintensitydistributionisinaccordwithbothwavepropagationtheoryandtheinvestigationintensity.
简介:在Chukchi海的后生动物的meiofauna从七个浅水车站被收集(深度变化46~52m)并且五个深海车站(深度在393和2300m之间变化)在第4中国公民期间在2010的北极研究远征。结果证明许多meiofauna在浅水沉积是更高的(2445ind./平均(10厘米<啜class=“a-plus-plus”>2))比在深海沉积(407.06ind./(10厘米<啜class=“a-plus-plus”>2))。为二个不同区域之间的差别的UNIANOVA测试是高度重要的(F=101.15,p<0.01)。线虫是数字地主导的,代表(96.6
简介:GeographicaldistributionofhypocentraldepthsofChineseearthquakesXING-BEIDUAN(段星北)InstituteofGeophysical,StateSeismologicalBur...
简介:SeveralfactorsareselectedtoreflectthetemporalandspatialfeaturesofseismicityinSouthwestChina.Themeasurementsofthefactorsarealltakenfromthestatisticalrelationbetweenthefactorsandactualearthquakes,andmakethefactorspossessacertainprobabilisticpredictionmeaningandthebaseformutualcontrast.Theeffectsofpredictionofpartofthefactorshavebeenevaluatedandusedtocorrectthefactors.Threesetsofseismicspatialdistributionfunctionshavebeencalculatedbyusingthreedifferentmethodsanddiscussedindetail.
简介:Aprobabilitydensityfunction(PDF)isderivedofbetadistributionwithbothλ3(skewness)andλ4(kurtosis)asparametersforweaklynonlinearwavesurfaceelevationbyuseofamethodrecentlyproposedbySrokosz.ThisPDFnotonlyhasasimplerformthanthewell-knownGram-CharlierSeriesPDFderivedbyLonguet-Higgins,butalsoovercomesanobviousshortcomingofthelatterthatwhentheseriesisunsuitablytruncated,theresultingPDFislocallynegative.TotestthederivedbetaPDF,laboratorialexperimentsofwindwavesareconducted.TheexperimentaldataindicatethatthetheoreticalrequirementsoftheparametersinthebetaPDFarefulfilled.TheexperimentalresultsshowthatthepresentPDFisinbetteragreementwiththemeasureddatathanthebetaPDFonlyincludingparameterλ3,andalsothantheGram-CharlierSeriesPDFtruncateduptothetermofH6.
简介:Thispaperpresentstheexperimentalresultsonthedistributionofsedimentsatchannelbifurcation.Theexperimentshavebeenconductedinaphysicalmodelofchannelbifurcation.Itconsistsofastraightmainchannelwhichbifurcatesintotwobranchchannelsofdifferentwidths.Thetestrigisamobilebedwithfixedbank.Fourdifferentnoseshavebeenusedtostudythephenomenon.Foreachnose,threeupstreamdischargesviz.20l/s,30l/sand40l/shavebeenemployed.Fromthemeasureddata,dischargesandsedimenttransportratiosperunitwidtharecalculatedinthedownstreambranches.Thesedatahavebeensettothegeneralnodalpointrelationandasetofequationshasbeendevelopedtodescribethedistributionofsedimentstothedownstreambranchesfordifferentnoseangles.
简介:Insteady,solid-liquidtwo-phaseturbulentflows,thereexisttwotypicalpatternsoftheverticaldistributionofparticleconcentration.ThepatternIshowsamaximumconcentrationatanelevationabovethebed.ThepatternIIshowsanincreaseoftheparticleconcentrationdownwardoverthewholevertical,withthemaximumatthebed.MostofthetheoriesonparticleconcentrationdistributionhavebeendonewiththepatternII,anditislackofasuccessfultheorycovetingbothofthetwopatterns.Thispaperreviewstheparticledistributiontheories,includingthediffusiontheory,themixturetheory,theenergytheory,thesimilaritytheory,thestochastictheoryandthekinetictheory.Thekinetictheoryisalsoappliedtodescribetheverticaldistributionofparticleconcentrationinbothdiluteanddenseflows.
简介:OnthebasisofaninvestigationonthemangrovesinFujianfromNovember1998toJanuary1999,thespeciescomposition,area,distribution,artificialafforestationofmangrovesandthefactorsrestrictingthedevelopmentofmangrovesinFujianarediscussedinthepaper.SomesuggestionsonhowtodevelopmangrovesinFujianhavebeenputforward.
简介:ThestudiesonthedistributionandvaratiationofthespecificationofphosphorusinthesouthernpartoftheYellowSeaaremade.ThebiogeochemistryofphosphorusintheYellowSeaisdiscussed.ThephosphorusisslightlyhigherinthebottomthaninthesurfacewatersinthesouthernpartoftheYellowSeaandthedissolvedorganicphosphorusisthemainform.Thetransferpatternsbetweenvariousformsofparticulateanddissolvedphosphorusaredifferentinthebottomandsurface,probablyduetothecontributionofdissolvedorganicphosphorus.Thedistributionsofdissolvedinorganicphosphorusanddissolvedorganicphosphorusaremainlyaffectedbythebiologicalprocessesandcouldactasapredictionfactorfortheredtide.ThesupplyofNandPinmostoftheareasinthesouthernpartoftheYellowSeaissufficient,withoutapparentlimitationofNorP.