简介：-Byusinggas-liquidtwo-phaseflowtheory,amodifiedmathematicalmodelbasedonthecomputationalfluiddynamicsmethodSIMPLE(Semi-ImplicitMethodforPressure-LinkedEquations)isintroducedtoinvestigateimplosionphenomenainhighpressurechamberssystematically.Atheoreticalsimulation-predictionmethod,whichisindependentofexperimentaldata,isdevelopedinthepaperandgreatimprovementhasbeenmadeonthetopic.Inthepaper,variousimplosionsituationshavebeensimulatedandpredicted.Effectsofaseriesoffactorsinfluencingimplosionresultsandmethodsofreducingimplosiondangerhavebeenanalysed.Theanalysisresultsareofimportancetounderwaterengineeringpractice.

简介：ChemicalfluxesofAsianriversintooceansbeardifferentregionalvariations.Threezonesarecharacteristicofdistinctdissolvedsedimentloadsandyieldsandionicconcentration.RiversintooceansinChinaplayanimportantroleinAsiabecauseoftheirdifferentchemicalfluxes,amongwhichthosedrainingtheLoessPlateauhavehighionicconcentration,lowwaterdischargesanddissolvedsedimentloadsandyields.Climate,vegetation,soilandstratalithology,chemicalweatheringintensityandtectonicactivitydominatechemicalfluxesofAsianriversintooceans,anddifferentfactorshavedifferenteffectsonthechemicalfluxesofseparateregionalrivers.RisingoftheTibetPlateaualsoexertsanimportantinfluenceonchemicalcompositionsofriversoriginatingfromit.

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简介：Size-basedpartitioningofphytoplanktonisausefultoolformonitoringkeyphytoplanktontraits,anditprovidesabetterunderstandingofphytoplanktondynamics.Ouraimistodeterminethevariationinthedifferentsizeclassesofphytoplanktontothetotalphytoplanktonbiomassduringthespringandautumnof2010andexaminetherelationshipbetweenphytoplanktonsizestructureandenvironmentalvariablesandzooplanktoncommunitystructureneartheChangjiangEstuary.Inthespring,phytoplanktonpopulationswerepredominantlyconsistedofnanophytoplanktonthroughoutthestudyregion.Intheautumn,picophytoplanktonandnanophytoplanktoncollectivelydominatedthephytoplanktoncommunity.APearsoncorrelationanalysishighlightedtheroleoftemperatureandtrophicconditionsonthecontributionsofnanophytoplanktonandpicophytoplankton.Thegrazingpressureexertedbymesozooplanktoncouldhaveplayedanimportantroleindeterminingthemicrophytoplanktoncommunitystructure.

简介：Thestressintensityfactors(SIF)consideringarbitrarilydistributedsurfacetractionsareevaluatedbasedonthescaledboundaryfiniteelementmethod(SBFEM).Thesemi-analyticalsolvingprocessforthestressintensityfactorsincludingtheeffectsofsurfacetractionsispresented.ProvidedarethenumericalexamplesfortheevaluationofmodeⅠandⅡstressintensityfactorswithlinearandnon-lineardistributingforcesloadedonthecracksurfaces.Thecrackproblemsofanisotropyandbimaterialinterfacearealsostudiedandthestressintensityfactorsofsingle-edge-crackedorthotropicmaterialandbi-materialinterfaceproblemswithsurfacetractionsarecalculated.Comparisonswiththeanalyticalsolutionsshowthattheproposedapproachiseffectiveandpossesseshighaccuracy.

简介：ThePrydzBayintheAntarcticisanimportantareaintheSouthernOceanduetoitsuniquegeographicfeature.ItplaysanimportantroleinthecarboncycleintheSouthernOcean.Toinvestigatethedistributionsofcarbondioxideintheatmosphereandsurfaceseawateranditsair-seaexchangeratesinthisregion,theChineseNationalAntarcticResearchExpedition(CHINARE)hadsetupseveralsectionsinthePrydzBay.HerewepresenttheresultsfromtheCHINARE-XVIcruiseswerepresentedonboardR/VXuelongfromNovember1999toApril2000andthemaindrivingforceswerediscussedcontrollingthedistributionsofpartialpressureofcarbondioxide.Accordingtothepartialpressureofcarbondioxidedistributions,thePrydzBaycanbedividedintotheinsideandoutsideregions.Thepartialpressureofcarbondioxidewaslowintheinsideregionbuthigherintheoutsideregionduringthemeasurementperiod.Thisdistributionhadagoodnegativecorrelationwiththeconcentrationsofchlorophyll-aingeneral,suggestingthatthepartialpressureofcarbondioxidewassubstantiallyaffectedbybiologicalproduction.TheresultsalsoindicatethatthebiologicalproductionismostlikelythemaindrivingforceinthemarginalicezoneintheSouthernOceaninsummer.However,intheAntarcticdivergencesectorofthePrydzBay(about64°S),thehydrologicalprocessesbecomethecontrollingfactorastheseasurfacepartialpressureofcarbondioxideismuchhigherthantheatmosphericoneduetotheupwellingofthehighDICCDW,andthismadetheoutsideofPrydzBayasourceofcarbondioxide.Onthebasisofthecalculations,theCO2fluxinJanuary(australsummer)was-3.23mmol/(m2·d)intheinnerpartofPrydzBay,i.e.,asinkofatmosphericCO2,andwas0.62mmol/(m2·d)intheoutsidepartofthebay,aweaksourceofatmosphericCO2.Theaverageair-seafluxofCO2inthePrydzBaywas2.50mmol/(m2·d).

简介：BasedonthedataofphytoplanktonandenvironmentalfactorsintheBohaiBay,thedependencebetweentheconcentrationofphytoplanktonandenvironmentalfactorsisanalysedbylinearcorrelationcoefficient,rankcorrelationcoefficientandHoeffdingtestofindependence.Theresultshowsthatwind-speed,air-pressure,surfacetemperature,fieldpH,salinity,DO,silicateandNO3haveagreatimpactontheconcentrationofphytoplankton.

简介：泛音分析，传统的潮汐的预报方法，不能考虑noncyclical因素的影响，并且也基于是的潮汐的预言模型容易由数据的数量限制了的BP神经网络。根据天的身体的运动，并且就被非周期性的天气影响的历史的数据的不够的潮汐的特征而言，一个潮汐的预言方法基于支持向量机器(SVM)被设计由从厦门使用潮汐的数据执行模拟实验潮计量器，Luchaogang潮计量器和Weifang潮个别地计量。并且结果证明模型令人满意地执行被noncyclical因素影响的潮预言。同时，它也证明建议预言方法，它什么时候与泛音分析方法和BP相比神经网络方法，让更快的建模加速，更高的预言精确和更强壮的归纳能力。

简介：全部的水银(THg)和甲基水银(MeHg)的集中为沿着福建省和东方广东省的沿海的线收集的32表面沉积被决定。THg和MeHg和他们的环境影响因素的空间分布被调查。在沉积的THg和MeHg的平均集中分别地是31.5ng/g和0.096ng/g。沉积THg和MeHg集中在Minjiang河口和Quanzhou和Putian的沿海的区域显示出相对高的价值。当到海岸线的距离增加了，集中总的来说减少了。在环境影响因素和THg之中的关联，MeHg被分析。沉积THg集中高度被相关到有机物，铜，全部的氮(TN)和全部的磷(TP)的集中，并且显著地相关到底部海水的pH价值和沉积硫化物的集中。沉积MeHg集中高度被相关到有机物和铜的集中，并且重要相关到硫化物，TN，TP和底部海水的pH价值的集中。

简介：Usingacoccolithweightanalyticsoftware(ParticleAnalyser),weanalyzemostabundantcoccolithspeciesinasedimentcorefromthecentralWesternPacificWarmPool(WPWP)andcalculatecoccolithsizeandweightvariationsoverthelast200ka.Thesevariationsarecomparedwiththetrendsofseasurfacetemperature(SST),primaryproductivity(PP),seasurfacesalinity(SSS),andinsolation.Ourresultsdemonstratethatthesizeandweightofthecoccolithsvariedinresponsetovariationsofthesefactors,andtheiraveragetotalweightisprimarilyrelatedtotherelativeabundanceofthedominantspeciesGEO(Gephyrocapsaoceanica).ThevariationinweightofEMI(Emilianiahuxleyi)andGEE(Gephyrocapsaericsonii)aremainlyinfluencedbynutrients,andthevariationofGEM(G.muelleraeconformis)andGEO(G.oceanica)weightaremainlyinfluencedbySST.Forallofthetaxaweight,PPandSSTpresentapparentprecessionorsemi-precessioncycles,weconsiderthatthemono-coccolithweightoftheEquatorialWesternPacificisprimarilyaffectedbyprecessiondrivedthermoclineandnutriclinevariation.更多还原

简介：人工地介绍的cordgrass，Spartinaalterniflora，很快开拓殖民地于江苏海岸的intertidal公寓，东方中国。一座intertidal公寓上的浅海生物由S入侵了。alterniflora被学习，到识别怎么本地浅海生物种类反应到改变的环境。Epibenthic样品和地表的沉积样品越过Spartina盐沼在十个车站在50空铅沿着岸正常侧面被收集；并且为一个车站的五控制空铅在贫瘠沙泥的公寓上定位了。地表的沉积的谷物尺寸参数显示出那S。alterniflora由套住有细密纹理的沉积沿着intertidal地区的侧面改变了谷物尺寸坡度。Spartinaalterniflora能比土生土长的盐沼植被住在更低的举起，因此创造更好的地表的沉积的更大的区域，它对不在贫瘠沙泥的公寓上存在的本国的epibenthic种类而且种类合适不仅。关联分析证明浅海生物对沉积谷物尺寸和类型敏感，在入侵的S上。alterniflora盐沼。进一步，有一种种间的关系，影响浅海生物的分发。结果证明浅海生物比较喜欢生态的壁龛，在Spartinasaltmarsh以内，甚至在一样的采样车站。

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简介：ThedinoflagellatecystassemblagesontheNanjiIslandintheEastChinaSea,aredocumentedatthefirsttimetoconstructaquantitativeoverviewofthecystbankfrom2014to2015.Thirty-fourmorphotypesfromsixgroupsareidentifiedandquantifiedateightsamplingsitesaroundtheisland,includingahighproportionofpotentiallytoxigenicspecies(14%).Autotrophicdinocystsconstitute74%ofthetotalcystcounts,whichisrelativelylow(twotothirty-threepermillilitresediment)comparedwithpreviousstudiesinadjacentareas.ScrippsiellatrochoideaandProtoperidiniumavellanaarethemostabundantautotrophicandheterotrophicspecies,respectively.Amultivariateanalysisisperformedtoassessassociationsbetweendinocystsandabioticorbioticvariables.Differentiationamongseasonsisevidentinthedetrendedcorrespondenceanalysis(DCA)ordinationplot,whileaspatialpatternisnotclearlyrevealeddespiteheterogeneityofthehydrodynamicconditionsbetweensamplingsites.Solublereactivephosphate,theratioofnitrogentophosphorusconcentrationsandKareniamikimotoibloomarethethreefactorssignificantly(P<0.05)relatedtosurfacesedimentcystassemblagedefinedbythecanonicalcorrespondenceanalysis(CCA),highlightingtheimportanceofnutrientregimetoadinocystdistributioninthisarea.AlthoughattemptstoaddresstheoriginofHABeventsinrecentyearsusingseedbankshavefailed,knowledgecanbevaluableforfurtherinvestigationofdinocystdynamicsandpotentialtoxinthreatsontheNanjiIsland.

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