简介：Theresultsofastudyonthekeytechnologyofusingshellsand,akindofseasand,asbackfillforseareclamationaredescribedbriefly.Laboratorytestsshowthatthephysicalandmechanicalpropertiesofshellsandareasgoodasnormalquartzsand.Basedonthechemicaltestanddurabilitytestofshellsanditcouldbeconcludedthattheinfluenceofcorrosionofshellsandbyacidrainandseawatermightbeignoredintheevaluationofthesafetyanddurabilityoftheengineeringproject.Theresultsoffieldimprovementtestsshowthatthebearingcapacityofshellsandbackfillfoundationismorethan200kPaaftervibroflotationimprovementordynamiccompactionimprovement.Theshellsandisagoodbackfillmaterialforseareclamation.

简介：BasedonthebiologicalresourcessurveysinChina'sexclusiveeconomiczone,thepaperdiscussestheapplicationoftheGIStechnologyinevaluatingthemarineenvironmentalquality,establishesthebasicconceptandtechnologicalprocessforevaluatingtheenvironmentalqualityofthehabitatsofmarinelivingresources,proposesthekeypointsfortheestablishmentoftherelevantevaluationattributesdatabasebyapplyingtheGIStechnologyandanalysesseveraltypicalevaluationmodelsandthedatainterpolationmethodforthemodelinGIS.ResultsshowthatthecombinationoftheGIStechnologywiththequantitativeevaluationmodelcanbeappliedtothefastandaccurateevaluationofthemarineenvironmentalquality.

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

简介：用为水质量的遥感技术，评估是在海洋的环境监视的一个不可避免的趋势。然而，水质量参数的更少范畴能被遥感技术比35在GB3097-1997海洋的水质量标准指定的监视。因此，我们考虑了哪个参数必须被遥感选择并且怎么用有限参数为水质量评估当模特儿。在这篇论文，集中了于Leizhou半岛nearshore水，我们发现了N，P，货到付款，PH并且做是由分析测量数据的水质量的主导的参数。然后，数学统计被用来决定在五个参数之中的关系是货到付款>>P>N>pH。最后，五参数，fourparameter和三参数的水质量评估模型被建立并且比较。结果显示出那货到付款，，P和N是为Leizhou半岛nearshore水质量，和最佳的全面的水质量的遥感评估的必要参数评估模型fourparameter模型。这个工作可以为由遥感监视另外的海洋的水的质量用作一本参考书。

简介：Fishmaw(thedriedswimbladdersoffish)isrankedinthelistofthefourseatreasuresinChinesecuisine.Fishmawismainlyproducedfromcroaker,whichisthemosthighlypriced.However,someofthefishmawbeingsoldascroakermawareinfactnotfromcroaker,butfromtheNileperchLatesniloticus.Thepresentworkdeterminedandcomparedtheproximatecomposition,aminoacidandfattyacidcompositionofcroakerProtonibeadiacanthusmawandperchL.niloticusmaw.Theresultsindicatedthatbothmawswerehighproteinsourcesandlowinfatcontent.Thedominantaminoacidsinbothmawswereglycine,proline,glutamicacid,alanineandarginine.Theseaminoacidsconstituted66.2%and66.4%ofthetotalaminoacidsinP.diacanthusandL.niloticus,respectively.TheratioofFAA:TAA(functionalaminoacids:totalaminoacids)inbothmawswere0.69.ThisisagoodexplanationforwhyfishmawshavebeenwidelyutilizedasatraditionaltonicandremedyinAsia.Exceptvalineandhistidine,alltheessentialaminoacidcontentsinP.diacanthuswerehigherthaninL.niloticus.Moreover,croakerP.diacanthusmawcontainedmoreAAandDHAthanperchL.niloticusmaw,showingahigherratioofn-3/n-6,whichismoredesirable.

简介：Waterqualityiscriticaltoensurethatmarineresourcesandtheenvironmentareutilizedinasustainablemanner.TheobjectiveofthisstudyisthereforetoinvestigatetheoptimumplacementofmarineenvironmentalmonitoringsitestomonitorwaterqualityinShanghai,China.Toimprovethemappingorestimationaccuracyoftheareaswithdifferentwaterqualitygrades,themonitoringsiteswerefixedintransitionbandsbetweenareasofdifferentgradesratherthaninotherpositions.Followingbidirectionaloptimizationmethod,first,18candidatesiteswereselectedbyfilteringoutspecificsitecategories.Second,threeofthesewere,inturn,eliminatedbecauseoftheruledefinedbythechangesintheareasofwaterqualitygradesandbythestandarddeviationoftheinterpolationerrorsofdissolvedinorganicnitrogen（DIN）andphosphate（PO_4-P）.Furthermore,indicatorkrigingwasemployedtodepictthetransitionbandsbetweendifferentwaterqualitygradeswhenevernewsamplingsiteswereadded.Thefouroptimizationprojectsofthenewlyaddedsitesrevealthat,alloptimizedsitesweredistributedinthetransitionbandsofdifferentwatergrades,andatthesametimeintheareaswherethehistoricalsitesweresparselydistributed.Newsiteswerealsofoundintheoverlapregionofdifferenttransitionbands.Additionalsiteswereespeciallyrequiredintheseregionstodiscriminatetheboundariesofdifferentwaterqualitygrades.Usingthebidirectionaloptimizationmethodofthemonitoringsites,theboundariesofdifferentwaterqualitygradescouldbedeterminedwithahigherprecision.Asaresult,theinterpolationerrorsofDINandPO_4-Pcouldtheoreticallydecrease.

简介：-Thispapercarriesouttheanalysisofmechanicsofagripsystemofthree-key-boardhydraulictongsdevelopedforoffshoreoilpipelineswhichhasbeensuccessfullyusedinoilfieldsinChina.Themainimprovementofthissystemisthataleverframestructureisusedinthestructuraldesign,whichreducesgreatlythestressesofthemajorcomponentsoftheoilpipetongs.Theoreticalanalysisandnumericalcalcu-lationbasedonthirteenbasicequationsdevelopedshowthattheteethboardofthetongsisnoteasytoslipasfrequentlyhappenstoothersystemsandisofhigherreliability.

简介：-Theturbulencemechanismplaysanimportantpartinthemixingprocessandmomentumtransferofturbulence.Athree-dimensionalPrandtlmixinglengthtidalmodelhasbeendevelopedtosimulatetidalflowsandwaterquality.TheeddyviscositiesanddiffusivitiesarecomputedfromthePrandtlmixinglengthmodel.Inordertomodelthewaterqualityofanestuaryorcoastalareamanyinterdependentprocessesneedtobesimulated.Thesemaybeconvenientlyseparatedintothreemaingroups:transportandmixingprocesses,biochemicalinteractionofwaterqualityvariablesandtheutilizationandre-cyclingofnutrientsbylivingmatter.Themodelsimulatesfulloxygenandnutrientbalance,primaryproductivityandthetransport,reactionmechanismandfateofpollutantsovertidaltime-scales.ThemodelisappliedtonumericalsimulationoftidalflowsandwaterqualityinDalianBay.Themodelhasbeencalibratedagainstalimiteddatasetofhistoricalwaterqualityobservationsandingeneraldemonstra

简介：Weinvestigatedtheeffectofthereplacementofdietaryfishoilwithvegetableoilsonthegrowthandfleshqualityoflargeyellowcroaker(Larmichthyscrocea).Thebasaldiet(FO)wasformulatedtocontain66.5%fishmealand6.4%menhadenfishoil;whereastheother3experimentaldietswereformulatedbyreplacingthefishoilwith50%soybeanoil(SO50),100%soybeanoil(SO100)and100%palmoil(PO100),respectively.The4dietswererandomlyassignedto4floatingseacages(3.0m×3.0m×3.0m),andeachwasstockedwith250fishindividualswithaninitialaverageweightof245.29g±7.45g.Thefishwerefedtoapparentsatiationtwiceadayat5:00and17:00,respectively,for12weeks.ExperimentalanalysisshowedthatthespecificgrowthrateoffishfedSO50orPO100weresignificantlyhigherthanthatoffishfedFOorSO100(P<0.05),andcrudelipidcontentsofventralmuscleandvisceraweresignificantlylowerinfishfedFOthaninthosefedtheother3diets(P<0.05).Nosignificantdifferencesinconditionfactor,viscerosomaticindex,hepatosomaticindex,guttedyieldandcolorimetricvaluesoffishamongthedietarytreatmentswereobserved(P>0.05).ComparedtoFOdiet,SO50,SO100andPO100dietsledtosubstantialdecreasesintheliquidlossandwaterlossfromfreshfillets(1d,4℃)(P<0.05).Similarly,thiobarbituricacidreactivesubstance(TBARS)valuesoffilletsunderdifferentstorageconditions(1d,4℃;7d,4℃;4weeks,-20℃;8weeks,-20℃)decreasedsignificantlyafterpartialorcompletereplacementoffishoilwithvegetableoils.Thesefindingsindicatedthatthegrowthperformanceandselectedfleshqualityproperties(liquidholdingcapacityandTBARSvalue)oflargeyellowcroakerweresubstantiallyimprovedbyreplacingdietaryfishoilwithvegetableoils.

简介：Onthebasisofthedataofbiologicalandnonbiologicalfactorscollectedrespectivelyfrom1989to1990andfrom1995to1996inthewatersnearbytheQinshanNuclearPowerStation,theecologicalenvironmentandwaterqualityofthewatersareanalyzedandassessedinthepaper.Theresultsshow:(a)thesurveyedareahasthetypicalecologicalcharacteristicsofhightidalrangeestuary,richnutrientsandlowbiologicalproductivity,(b)tide,runoffandoffshoreseawaterintrusionarethekeyfactorswhichresultinseasonalandannualchangesofvariousbiologicalandnon-biologicalfactors,(c)theriskingofseawatereutrophicationindexisresultedfromenormousamountofthedischargesofindustrialanddomesticsewage,(d)becausethesurveyareaislocatedinahightidal-rangeestuary,thermaleffluentfromcoolingsystemdoesnotinducesignificanttemperaturechanges,(e)thefirststageprojectofQinshannuclearpowerstationhasnonotableimpactsontheecologicalenvironmentinthe