简介:根据2004年5-11月我国鱿钓船在北太甲洋生产数据,结合表温资料,按经纬度1°×1°的格式,利用Marlneexplorer4.0软件作图进行分析。结果表明,5—7月在160°E以东海域作业,产量较低;8—10月在150°-160°E海域作业,为生产作业的产量高峰期,占总产量的62.5%;11月在150°E以西海域作业,产量也较低。在150°E以两海域CPUE最高,150°-160°E中部海域次之,160°E以东海域最低。作业渔场的适宜表温呈现出季节性变化。各月适宜表温分别为:5月12℃~14℃;6月15℃~16℃;7月14。C~16℃;8月18℃~19℃;9月16℃~17℃;10月15℃~16℃;11月12℃~13℃。K-S检验表明,卜述表温可作为寻找中心渔场的指标。
简介:TheenvironmentalconditionsaroundthefirstoffshoreHZ21-1steelwellheadplatformintheSouthChinaSeaarecharacterizedbydeepwater,frequenttyphoons,roughwaves,highwatertemperature,severelycorrosiveseawater,andthickfoulingorganismattachments.Thedesignandeffectivenessofgalvanicanodeprotectionsystemarepresented,andseveralmethodsaredescribed,whicharethecalculationmethodoftheprotectivecurrentdensityconsideringthevariationofwaterdepth,themethodofdeterminingprotectionparametersconsideringvariousfactors,thearrangementofanodesbasedonpotentialdistributionandcurrentrequirementsatdifferentwaterdepths,andthemethodofanodeinstallation.Finallytheeffectoftheaccuracyofselectedcathodicprotectionparametersontheeconomicbenefitsofoffshoreprojectsisalsodiscussed..
简介:为了评估海洋表面风向量和海表面温度,从WindSat获得了,我们从2004年1月在时间时期上把这些数量与系在的浮标大小作比较到2013年12月。在WindSat风速度和浮标风速度之间的吝啬的偏爱为低频率风速度产品(WSPD_LF)是低的,变化from0.07到在不同选择区域的0.08m/s。全面RMS错误是为WSPD_LF的0.98m/s,从在不同选择区域的0.82~1.16m/s。在热带海洋的风速度检索结果比美国的沿海、近海的水的好。另外,WSPD_LF的风速度检索精确性比中等频率风速度产品的好。串音分析显示WindSat风速度检索从另外的地球物理的参数包含一些生气影响,例如海表面温度,水蒸汽和云液体水。在WindSat风方向和浮标风方向范围from0.46之间的吝啬的偏爱??
简介:Huanghe河三角洲是世界的大河之一,自从最后,Huanghe河里的Huanghe河三角洲paleoenvironmental进化是一个热问题冰川。基于联合AMS14核心DYZK1沉积标明日期在的C在亚底部侧面上Huanghe河三角洲和声学的顺序沉没了,phytolith分析在96件沉积样品上被执行。谷物尺寸参数,磁性的危险性与biostratum的垂直变化被相结合重建在Huanghe河三角洲的paleo沉积、气候的条件。在索引参数有一条重要垂直变化法律的学习结果表演,和Huanghe河三角洲的那沉积环境经历了河的facies-sealand转变的进化进程外形潮汐的完全外形浅海的faciesdelta外形自从26.0kaB。P...phytolith分析结果如下。第一,phytoliths被划分成矛尖状,光滑伸长,多刺伸长,一种特殊格律,长矩形,bulliform和其它类型。在不同sedimental环境,phytolith内容定期变化,显示phytolith在沉积环境有的一样装配稳定性的某个度。第二,矛尖状,phytoliths的光滑伸长和多刺伸长范畴在潮汐的扁平的外形和三角洲免职有更大的内容,当时一在浅海的外形的更小的内容和河的外形环境。通过变化系数的比较分析,第三,在沉积的主要phytolith范畴的内容在sealand转变外形和河的外形免职有一个更大的变化振幅,当在tidalflat外形和三角洲外形免职是更稳定的时。
简介:Astheexplorationandexploitationofoilandgasproliferatethroughoutdeepwaterarea,therequirementsonthereliabilityofdynamicpositioningsystembecomeincreasinglystringent.Thecontrolobjectiveensuringsafetyoperationatdeepwaterwillnotbemetbyasinglecontrollerfordynamicpositioning.Inordertoincreasetheavailabilityandreliabilityofdynamicpositioningcontrolsystem,thetripleredundancyhardwareandsoftwarecontrolarchitecturesweredesignedanddevelopedaccordingtothesafespecificationsofDP-3classificationnotationfordynamicallypositionedshipsandrigs.Thehardwareredundantconfigurationtakestheformoftriple-redundanthotstandbyconfigurationincludingthreeidenticaloperatorstationsandthreereal-timecontrolcomputerswhichconnecteachotherthroughdualnetworks.Thefunctionofmotioncontrolandredundancymanagementofcontrolcomputerswereimplementedbysoftwareonthereal-timeoperatingsystemVxWorks.Thesoftwarerealizationoftaskloosesynchronization,majorityvotingandfaultdetectionwerepresentedindetails.Ahierarchicalsoftwarearchitecturewasplanedduringthedevelopmentofsoftware,consistingofapplicationlayer,real-timelayerandphysicallayer.ThebehavioroftheDP-3dynamicpositioningcontrolsystemwasmodeledbyaMarkovmodeltoanalyzeitsreliability.Theeffectsofvariationinparametersonthereliabilitymeasureswereinvestigated.Thetimedomaindynamicsimulationwascarriedoutonadeepwaterdrillingrigtoprovethefeasibilityoftheproposedcontrolarchitecture.
简介:Outerdensefibersarespecificsubcellularcomponentsofmammalspermflagella,apartfromtheaxonemeanditsassociatedproteins.Asoneoftheouterdensefiberscomponents,ODF3isessentialfortheformationofmammalspermflagella.Inthepresentstudy,weisolatedtheOdf3gene,1033bpinlength,fromZhikongscallopChlamysfarreri,whichwasnamedasCf-Odf3.ItwaspredictedthatCf-Odf3encodesaproteinof240aminoacidswhichcontains5discontinuousPro-Gly-Prorepeats.TheCf-Odf3transcriptsweredetectedinbothtestisandovaryofC.farreriatvariousstagesthroughqRT-PCR.TheCf-ODF3proteinsynthesizedbyprokaryoteswaspurifiedusingNi2+-NTAaffinitychromatographyandusedtoproduceitspolyclonalantibody.TheantibodyproductwaseffectiveandspecificaswasexaminedbyWesternblotting.TheCf-Odf3transcriptandCf-ODF3proteinwerelocatedinintragonadalsomaticcells(ISCs),spermatogoniaandspermatocytesofC.farreritestes,whilenotranscriptionofCf-Odf3andsynthesisofCf-ODF3weredetectedinspermatidsandspermatozoa.ThelocationofOdf3expressionisdifferentfromthatofvertebrateswhereODF3issynthesizedspecificallyinspermatidsandspermflagella.Moreover,theCf-Odf3expressionwasalsodetectedinISCs,oogoniaandoocytesofthescallopovaries.OurfindingrevealedadifferentcharacteristicofOdf3expressionbetweenscallopandvertebrates,whichimpliedthatCf-Odf3playedaroleinthegametogenesisofC.farreri.
简介:EvolutionaryevidencesuggeststhatSox3,amemberofthehigh-mobility-group(HMG)familyoftranscriptionfactors,isanancestralprecursorofSryandisinvolvedinsexdeterminationsimilartoSry.However,thereislimitedinformationregardingtheSOX3geneoftheblackrockfish(Sebastesschlegeli).Inthisstudy,wefirstisolatedSOX3genefromthegonadsofS.schlegelibyhomologycloning.Thefull-lengthofS.schlegeliSOX3(SsSOX3)cDNAwas1386bp,comprisinga906-bpopenreadingframe,whichencodesapeptideshowing93.6%and93.9%homologywiththeSox3proteinsofEpinepheluscoioidesandOryziaslatipe,respectively.ComparisonofthecDNAsequenceoftheSsSOX3genewiththecorrespondinggenomicDNAfragmentrevealedthattheSsSOX3geneconsistsofasingleexon.PhylogeneticanalysisdemonstratedtheevolutionaryrelationshipofSsSOX3withotherknownSOXB1genesinfishandtetrapods.ThepromoterregioncontainsbindingsitesofseveraltranscriptionalfactorsthatmightparticipateintheregulationofSsSOX3expression.Quantitativereal-timePCRanalysisindicatedthatSsSOX3wasexpressedinalltheinvestigatedlarvaldevelopmentalstagesfrom1to35daysafterbirthandthelevelofexpressiongraduallydecreasedasthedevelopmentproceeded.SsSOX3exhibitedsexuallydimorphicexpressioninadultgonads,withhighexpressionintheovarybutlowexpressioninthetestis.InsituhybridizationrevealedthatSsSOX3wasstronglyexpressedinoocytesandfollicularcellsofovariesbutslightlyexpressedingermcellsoftesticulartissues.Therefore,thisstudysuggeststhatSsSOX3playsanimportantroleinoogenesisandovarydifferentiationinS.schlegeli.
简介:Combinedmulti-bodydynamicswithstructuraldynamics,anewdiscreteelementwithflexibleconnector,whichisapplicablefor3-Dbeamstructures,isdevelopedinthispaper.Boththegeneralizedelasticcoefficientmatrixoftheflexibleconnectorandthemassmatrixofdiscreteelementmaybeoff-diag-onalinageneralcase.Thezero-lengthrigidelementisintroducedtosimulatethenodeatwhichmultipleel-ementsarejointedtogether.Itmayalsobeeffectivewhentheaxesofadjacentelementsarenotinthesameline.Theexamplesforeigenvaluecalculationshowthatthemodelissuccessful.Itcanbeextendedtothegeometricnonlinearresponseanalysis.
简介:AbundantevidencesofhighersealevelsfromJiangsuandFujiancoastshaveprovedamarinetransgressioneventduring30–40kaBP,suggestingthattherewasastagewithhighsealevelandawarmclimatewhenicesheetsshrankintheNorthernHemisphere.Thedurationof30–40kaBPspannedaperiodinthelateMarineIsotopeStage3(MIS3)andwasinnatureaninterstadialepochduringtheLastGlacialperiodoftheQuaternary.Differentfromtheglacialperiodwithacoldclimate,thismarinetransgressionconsideredasapenultimatehighersealevelduringtheQuaternaryremainsapuzzlethatwhytheevidenceiscontrarytotheQuaternaryglacialtheory.Itisimportanttounderstandsealevelrisefortheseareassensitivelyrespondingtotheglobalchangesinthefuture.Torecognizethekeyissuesonsealevelchanges,theeustaticsealevel(H_S)wasdefinedastheglaciation-climateforcedsealevels,andtherelativesealevelchange(H_R)wasdefinedasthatasealevelrecordwaspreservedinsedimentthatexperiencedmultiplesecondaryactionsoflandandseaeffects.Onthebasisasdefinedabove,weconstructedmulti-levelmodelsofclimate-drivenglacio-eustaticchangesandland-seasystems.Byintegratingdatasetsfromeightboreholecoresandprescribingtheboundaryconditions,wesimulatedthechangesofHSandHRintheEastChinaSeaandsouthernYellowSeaareasinthelateMIS3.Themarinetransgressionstratafromtheboreholecoredatawasidentifiedatca.30mbelowpresentsealevelasaresultofthecollectiveinfluenceoficemeltingwater,neotectonicsubsidence,sedimentcompactionandterrestrialsedimentfillingsinceca.35kaago,whereasthesimulatedrelativesea-levelsturnedouttobe–26.3––29.9ma.s.l.Thesmallerrorinvolvedinthesimulationresultsof±(2.5–4.5)mdemonstratedthecredibilityoftheresults.OurresultsindicatedthatsealevelchangeinthelateMIS3wasdominatedbyglacialeffects,inwhichtheeustaticsea-levelwasbetween–19.2�
简介:FattyacidcompositionsoftwostrainsofmarinediatomsNitzschiaclosterium(MACCB222)andChaetocerosgracilis(MACCB13)havebeenexamined.ThemicroalgaehavebeengrownatdifferentinitialNaNO3concentrations(75,375,750,1125,1500,1875mg/L)andharvestedatthelateexponentialphase.TheresultsbyonefactoranalysisofvarianceshowthattheNaNO3concentrationshavenosignificantinfluenceontherelativegrowthrateoftwostrainsofmarinediatoms;theinfluenceofNaNO3concentrationsonthefattyacidsdiffersfromspeciestospecies.Themajorfattyacidsoftwodiatomstrainsare14:0,16:0,16:ln-7and20:5n-3(EPA),B13alsohashighpercentageof20:4n-6(6.0~9.1%).
简介:有不同规模的很多海底的山崩在Liwan3-1气体地的海底的管道线路的峡谷区域被识别了。仍然有许多机会,海底的斜坡失败将发生,并且下列集体运动将介绍大风险给海底的管道。鉴于这,一个数字预言方法基于Eulerian-Eulerian二阶段的流动模型被介绍模仿潜在的海底的山崩的集体运动。滑动土壤和周围的水被Herschel-Bulkley流变学模型和牛顿的液体模型分别地模仿。骚乱用k-模型被模仿。与两个相比实验数据并且是结果,二阶段的流动模型显示出好精确性,并且它的结果是更多关门到实际状况;在土壤和周围的水之间的动态联合能有效地被模仿,hydroplaning和头分开的现象能被获得。最后,潜在的海底的山崩的土壤运动作为一个例子被模仿,根据在峡谷区域的地震侧面。结果证明hydroplaning发生在运动过程期间。二阶段的流动模型计算的刺杀距离是877m,它是27.1%比是大结果。然而,土壤的山峰前面速度是相对的小,与8.32m/s的最大的价值。是有一个简单、快速的过程的节目能被用于初步的评估,当二阶段的流动模型为一个精确评价是更适当的时。
简介:Atime-domainmethodisappliedtosimulatenonlinearwavediffractionaroundasurfacepiercing3-Darbitrarybody.ThemethodinvolvestheapplicationofTaylorseriesexpansionsandtheuseofperturbationproceduretoestablishthecorrespondingboundaryvalueproblemswithrespecttoatime-independentfluiddomain.AboundaryelementmethodbasedonB-splineexpansionisusedtocalculatethewavefieldateachtimestep,andthefreesurfaceboundaryconditionissatisfiedtothesecondorderofwavesteepnessbyanumericalintegrationintime.Anartificialdampinglayerisadoptedonthefreesurfacefortheremovalofwavereflectionfromtheouterboundary.Asanillustration,themethodisusedtocomputethesecond-orderwaveforcesandrun-uponasurface-piercingcircularcylinder.Thepresentmethodisfoundtobeaccurate,computationallyefficient,andnumericallystable.
简介:Thetyphoon,asamaturetropicalcyclonethatdevelopsinthewesternpartoftheNorthPacificOceanwithhighwindspeedandheavyrainfall,isoneofthemostlethalandcostlyofnaturaldisastersforthedenselypopulatedcountriesofEastAsia.Itcanbeeasilydetectedbyspace-bornesensorsoperatedatmicrowave,visibleorinfraredbands(Liuetal.,2014).SyntheticApertureRadar(SAR)is