简介：First,Wirsching＇smodel,whichiswidelyemployedinfatiguereliabilityanlysisofmarineandoffshorestructures,isanalysedsystematically.Itisfoundthattheveryimportantrandomvariable△inWirsching＇smodelcannotbedirectlydeterminedfromfatigueexperimentbecauseoftheirreversibilityoffatiguetest,andinfact,whatWirschingstudiedfromtestingresultsisnot△butαofthestatisticalMiner＇srule.Second,byuseofthestatisticalMiner＇srule,amodifiedWirsching＇smodelisproposed.Thirdlyandmoreimportantly,basedonthetwo-dimensionalprobabilisticMiner＇srule,anewmodelisestablishedforfatiguereliabilityanalysisofstructuralcomponentssubjectedtospecifiedcyclicloadingofvariableamplitudeorstochastictimehistory.Intheend,anexampleispresented,fromwhichitwillbeseenthatthisnewmodelisveryconvenienttouseandfeasibletoengineeringpractice.

简介：ByimplementingtheARGOprogram,alargenumberofT-Sprofilescanbeobservedintheworldocean.However,itisverydifficulttoexaminechangesofthesensitivityofthesensorsequippedattheARGOfloats,becauseitisdifficulttounderstandtheirconditionintheseaandthereliabilityofthedata.Qualitycontrolmustbedoneinordertoavoidthewrongconclusiondeducedfromthewrongdata.OneoftherealisticmethodsforqualitycontroloftheARGOdataisthecomparisonwiththelocalclimatology.HighqualityclimatologicalT-SmodelsinnorthwestPacifichavebeenbuiltbasedontheNansenbottledataandCTDdataforthequalitycontrolinNMDIS.ThemodelsareusedtochecktheARGOdatainthisareaandhavegotgoodresult.

简介：DragforcesactingonSchlegel'sblackrockfishSebastesschlegeliwerestudied.AnewdragforcetransducerwasdesignedandusedtomeasurethewaterdragonSchlegel'sblackrockfishinaverticalrecirculatingflumetank.Fourteenindividualswereinvestigated,yieldingtwomeandragcoefficientsreferredtothecross-sectionalareaandvolume2/3respectivelyatwatervelocitiesrangingfrom0.3to1.0ms-1.ThedragcoefficientscanbeusedforestimatingthedragforcesactingonSebastesschlegeliinwater.

简介：Generally,thereliabilityofami-slidingandanti-overturningstabilityofanisolatedgravitycylinderinacertainworkingperiodcanbeevaluatedonlywhenthestatisticalpropertiesofshorttermstabilityaregivenfirst.Theauthorsusednumericalmethodtosimulatethestabilitystatefunctionofacylinderinshort-crestedsea,andfurthertogettheprobabiliticalcharacteristicsofthestructure’sstabilitybytimedomainanalysis.Theexternalloadsappearedinthestatefunctionsincludehorizontalwaveforce,liftforceandtherespectivemoments,andtheloadsarecorrelatedbyco-spectrum.Thenumericalmethodpresentedinthispapercanbeusednotonlytosolveshorttermreliabilityproblemdirectly,buttocalculateandanalysethelongtermreliabilityproblemaswell.Forcircularcylinders,anexampleofsimulationandanalysisisdisplayedinthispaper.

简介：Thispaperreportstheabsorption,accumulation,distributionandcycleofCu,Pb,Zn,CrandNiinS.apetala+S.caseolaris,mangrovecommunityatFutianMangroveNatureReserveofShenzhen,TheCu,Pb,Zn,CrandNicontentsinforestsoilincreasefrombottomtosurfacelayers,andthestorageofthefiveheavymetalsinthesurfacelayer(depth0-30cm)isZn>Pb>Ni>Cr>Cu.TheconcentrationabilityisS.caseolaris>S.apetala>K.candel.TheexistingaccumulationofCu,Pb,Zn,CrandNiinthecommunityis23019.63μg/m^2,23429.66μg/m^2.177870.42μg/m^2,6835.80μg/m^2,and12995.22μg/m^2,respectively.Theannualabsorptionis6592.57μg/m^2,2664.80μg/m^2,23123.56μg/m^2,853.24μg/m^2,and1990.95μg/m^2,respectively.Theannualreturnis3179.50μg/m^2,1300.65μg/m^2,7401.31μg/m^2,398.99μg/m^2,and646.20μg/m^2respectively.TheannualnetretentionaccumulationofCu,Pb,Zn,CrandNiinthecommunityis3413.07μg/m^2,1364.15μg/m^2,15722.25μg/m^2,454.25μg/m^2,and1344.75μg/m^2,respectively,TheturnoverperiodsofCu,Pb,Zn,CrandNiare8,19,15,18and21years,respectively.

简介：ThewildPorphyrayezoensiscollectedfromtheQingdaocoastwasusedtoprepareprotoplastsbyenzymedigestion.Thepurelinewasconstructedbycultivatingtheprotoplasts.The18SrDNAoftheP.yezoensispurelinewasclonedandsequenced.Sequenceanalysiswasexecutedforthissequenceandother22sequencesretrievedfromGenBank.Aphylogenetictreewasconstructedusingtheneighbor-joiningmethod.Theresultsrevealedahighdiversityof18SrDNAsequencesingenusPorphyraandtheconsiderablevariationof18SrDNAsequencesindifferentstrainsofthesamespeciesP.yezoensisandP.tenera.Significantdifferenceof18SrDNAsequencewasobservedbetweenP.yezoensisfromQingdao,China,andthetwostrainsofP.yezoensisfromJapan,butthethreestrainsofP.yezoensisformedastablecladeinthephylogenetictree.TheseresultsindicatethepossibilityofinterspeciesandintraspeciesdiscriminationofPorphyrausingthe18SrDNAsequences.

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简介：通过对TOGA—COARE期间的一组锚系仪器阵列资料的分析得出：在赤道西太平洋1°45’S，156°E。海域存在显著的半日潮频内波，它的水平波数（波长）、垂向波数、水平传播速度和垂向传播速度分别约为：3．3×10^-2km^-1（210km），-1．6×10^-3m^-1，2．0m／s，-3．8cm／s。波形向斜下方传播，亦即波能向斜上方传输。它在观测点西南方生成后，向东北方向传播，到达观测海区。流速矢量旋转谱水平随深度的变化呈马鞍形，低谷及深处的峰所在深度分别与南赤道流及赤道潜流的南边界所在深度大体一致。旋转椭圆主轴方位角随深度变化，在浅层（40m处）为北偏东30°，到深处（324m）转为东偏南14°。总体上呈东北方向，表明波来自西南方向。