简介：Thegrowth,biochemicalcontentandbioaccumulationquantityof2,2’,4,4’-tetrabromodiphenylether(BDE-47)inSkeletonemacostatumwerestudiedunderdifferentN:Pratios(1,4,16,64and128).AllcellularbiochemicalcontentsofS.costatumpresenteddecreasingtrendovercultivationtime.Atearlystageofcultivation,thecellularprotein,carbohydrateandlipidinS.costatumpresentedhighervaluesintreatmentsofN:P=4and16.However,theywerelowerinthesetreatmentsatthelatestage,buthigherintreatmentsN:P=1and128.Similarly,BDE-47levelspercellofS.costatumwerehigherintreatmentsofN:P=4and16atearlystageofcultivation,whichwere3.8and3.7ng(106cells)-1,respectively.Atthemiddlestageofcultivation,theBDE-47levelperS.costatumcelllowered;anditfurtherreducedinthetreatmentsofN:P=4and16atthelatestagewiththevalues0.6and0.5ng(106cells)-1,respectively.However,itroseinN:P=128,reachingupto2.3ng(106cells)-1.ComparedwithBDE-47percell,BDE-47peralgalvolumeunderdifferentN:Pratiosdidnotpresentobviousdifference.ThequantityBDE-47accumulatedpercellofS.costatumwaspositivelycorrelatedwithprotein,carbohydrateandlipidpercell;meanwhile,theBDE-47pervolumehadapositivecorrelationwithbiochemicalcontentpervolume.ThevariationofbioaccumulationabilityofBDE-47inS.costatumcanbeexplainedbybiochemicalchangesduetoN:Pratios.

简介：Thispaperpresentsthedetaildesignconditions,designcriteriaandmethodsaswellasdesignconclusionsoftheprocess,structureandcorrosionoftheproductionflowlinesandhighpressurewaterinjectionlinesinBZ34-2/4oilfieldinBohaiBay.AtpresentthisdesignrepresentsthedesigncapabilityandlevelinthefieldofthesubmarinepipelineengineeringofChina.

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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：我国渤海、黄海和东海海区,以半日潮流为主。半日潮流计算简单。用图形表示的半日潮流图,使用方便,深受航行人员欢迎。而南海海区,则以全日潮流为主。计算全日潮流,比较复杂,图形表示更困难。因此,航海人员迫切需要也能有一种实用、方便的日潮流图。为满足此种需要,笔者几年来进行了有关方面的调访和研究。根据理论和经验,在马克西蒙夫日潮流分析基础上,引进半日潮流计算原理,并结合南海日潮的特点,推出了航海用的简易的日潮流计算法。此方法在计算和使用上都较方便、简单,图形也直观明了。

简介：Fifty-sevenstations(48gridstationsandninestratifiedstations)weresampledacrossthestudyregion(67.000°–88.394°N,152.500°–178.643°W)duringthe4thChineseNationalArcticResearchExpedition(CHINARE4)fromJulytoAugust2010bytheicebreakerR/VXuelong.Atotalof24speciesofHydromedusaewereidentifiedfrom130zooplanktonsamples,ofwhichsevenspeciesbelongedtoAutomedusa,eightspeciestoAnthomedusae,fourspeciestoLeptomedudae,andthreespeciestoSiphonophora.CatablemamulticirratumKishinouye,1910,BougainvilliabitentaculataUchida,1925,andEuphysajaponica(Maas,1909)wererecordedforthefirsttimeintheArcticsea.Inthepresentpaper,18speciesofHydromedusaeweredescribedandillustrated,ofwhichthreespeciesweredescribedforthefirsttimeintheArcticsea,and15speciesweredescribedforthefirsttimeinChina.

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：在磁力测量过程中,地磁日变观测站起着至关重要的作用,它是改正磁力测量实施过程中地磁场短期变化的基础.测量成果质量的优劣与地磁日变观测站原始数据的处理与分析有着密切的关系.本文通过理论推导得出一套地磁日变数据改正公式,同时提出了一种全新的改正方法.

简介：Acomprehensivestrengthmonitoringsystemusedonafixedjacketplatformispresentedinthispaper.Thelong-termmonitoringofW-11-4Aplatformachieved.Structuralresponses(strainandacceleration)atselectedlocations,aswellasassociatedenvironmentalparameters,havebeenobtained.Theemphasisofthepaperisplacedonthesystemdesign,andtheinstrumentationandoperationmethodologyemployedinthemonitoringofthestructuralresponses.Theperformanceofthesystemandthecharacteristicresultsobtainedduringits13-monthoperationarealsosummarized.

简介：Onthebasisofthetemperatureobservationsduring1961-2000inChina,sevencoupledgeneralcirculationmodels'(GCMs)extremetemperatureproductsareevaluatedsuppliedbytheIntergovernmentalPanelonClimateChange's4thAssessmentReport(IPCC-AR4).Theextremetemperatureindicesinusearefrostdays(FD),growingseasonlength(GSL),extremetemperaturerange(ETR),warmnights(TN90),andheatwavedurationindex(HWDI).Resultsindicatethatallthesevenmodelsarecapableofsimulatingspatialandtemporalvariationsintemperaturecharacteristics,andtheirensembleactsmorereliablethananysingleone.Amongthesevenmodels,GFDL-CM2.0andMIROC3.2performancesaremuchbetter.Besides,mostofthemodelsareabletopresentlineartrendsofthesamepositive/negativesignsastheobservationsbutforweakerintensities.Thesimulationeffectsaredifferentonanationwidebasis,with110°Nasthedivision,east(west)ofwhichtheeffectsarebetter(worse)andthepoorerovertheQinghai-TibetanPlateauinChina.Thepredictionsforthe21stcenturyonemissionsscenariosshowthatexceptdecreasesintheFDandETR,otherindicesdisplaysignificantincreasingtrend,especiallyfortheindicesofHWDIandTN90,whichrepresentthenotableextremeclimate.Thisindicatesthatthetemperature-relatedclimateismovingtowardstheextreme.Inthelate21stcentury,theGSLandTN90(HWDI)increasemostnotablyinsouthwestChina(theQinghai-TibetanPlateau),andtheFDdecreasemostremarkablyintheQinghai-TibetanPlateau,northwestandnortheastofChina.ApartfromSouthChina,theyearlychangerangeoftheextremetemperatureisreducedinmostofChina.

简介：HC-90D型地磁日变站系统的主体是高精度光泵磁力仪.比较详细地介绍了HC-90D型地磁日变站工作原理,阐述了架设日变站的方法和注意事项.

简介：TiO2filmswereformedonmetallictitaniumsubstratesbytheanodicoxidationmethodinH2SO4solutionunderthe80VD.C..PhasecomponentandmicrostructurewerecharacterizedbyX-raydiffraction(XRD)andscanningelectronmicroscopy(SEM).Watercontactanglesontitaniumoxidefilmsurfaceweremeasuredunderbothdarkandsunlightilluminationconditions.Corrosiontestswerecarriedoutinseawaterunderdifferentilluminationconditionsbyelectrochemistryimpedancespectrum(EIS)andpolarizationcurves.TheresultshowedthattheTiO2filmpreparedbytheanodicoxidationmethodwasanatasewithauniformstructureandwithoutobviousporesorcracksonitssurface.Theaveragewatercontactangleofthefilmwas116.4?indark,incontrasttoanangleof42.7?undertheUVilluminationfor2hours,whichdemonstratesgoodhydrophobicproperty.Theanti-corrosionbehavioroftheTiO2filmwasdecliningwiththeextendedimmersiontime.Underdarkconditions,however,thehydrophobicTiO2filmretardedthewaterinfiltratingintothesubstrate.Theimpedancechangedslowlyandthecorrosioncurrentdensitywas2ordersofmagnitudelowerthanthatwiththefilmilluminatedbysunlight.AllofthosementionedaboveindicatethattheTiO2filmpossessesmuchbetterperformanceunderdarkcondition,anditcanbeappliedasanengineeringmaterialunderdarkseawaterenvironment.

简介：为弥补测高数据在近海区域因为编辑准则被剔除而导致近海测量数据质量不高的缺点,利用5参数模型的两种形式和Ice-2模型对Jason-2卫星在中国南海部分海域的海洋回波波形进行了波形重跟踪的研究,并选择20个海洋回波波形,依据最小二乘原理进行计算、分析、对比,发现5参数模型的指数形式的结果和Ice-2模型结果非常接近.研究结果表明,在开阔的海域,对Jason-2波形进行3种方法波形重跟踪时,可以优先考虑Ice-2模型.波形重跟踪技术能够提高卫星测高数据利用率,为科学研究提供可靠的数据保障.

简介：CarboncycleisconnectedwiththemostimportantenvironmentalissueofGlobalChange.Asoneofthemajorcarbonreservoirs,oceansplayanimportantpartinthecarboncycle.Inrecentyears,ironseemstogiveusagoodnewsthatoceanicironfertilizationcouldstimulatebiologicalproduc-tivityasCO2sinkofhuman-producedCO2.Oceanicironfertilizationexperimentshaveverifiedthataddingironintohighnutrientlowchlorophyll(HNLC)seawaterscanincreasephytoplanktonproductionandexportorganiccarbon,andhenceincreasecarbonsinkofanthropogenicCO2,toreduceglobalwarming.Insixtydays,theexportorganiccarboncouldreach10000timesforaddingironbymodelpredictionandinsituexperiment,I.e.TheatmosphericCO2uptakeandinorganiccarbondrawdowninupperseawatersalsohavethesamemagnitude.Therefore,oceanicironfertilizationisoneofthestrate-giesforincreasingcarbonsinkofanthropogenicCO2.Thepaperisfocusedontheironfertilization,es-peciallyinsituoceanironexperimentsinorderthatthefutureresearchismoreefficient.

简介：Astochastictwo-dimensionalFornasini-Marchesini'sModelⅡ(2-DFMMⅡ)withmultiplicativenoiseisgiven,andafilteringalgorithmforthismodel,whichisoptimalinthesenseoflinearminimum-variance,isdeveloped.Thestochastic2-DFMMⅡwithmultiplicativenoisecanbereducedtoa1-Dmodel,andtheproposedoptimalfilteringalgorithmforthestochastic2-DFMMⅡwithmultiplicativenoiseisobtainedbyusingthestateestimationtheoryof1-Dsystems.Anexampleisgiventoillustratethevalidityofthisalgorithm.

简介：Inthisstudy,thecombinedactionsofwavesandtidalcurrentsinestuarineandcoastalareasareconsideredanda2Dmathematicalmodelforsedimenttransportbywavesandtidalcurrentshasbeenestablishedinorthogonalcurvilinearcoordinates.Non-equilibriumtransportequationsofsuspendedloadandbedloadareusedinthemodel.Theconceptofbackgroundconcentrationisintroduced,andtheformulaofsedimenttransportcapacityoftidalcurrentsfortheOujiangRiverestuaryisobtained.TheDouGuorenformulaisemployedforthesedimenttransportcapacityofwaves.SedimenttransportcapacityintheformofmudandtheintensityofbacksiltingarecalculatedbyuseofLuoZaosen'sformula.Thecalculatedtidalstagesareingoodagreementwiththefielddata,andthecalculatedvelocitiesandflowdirectionsof46verticallinesfor8crosssectionsarealsoingoodagreementwiththemeasureddata.Onsuchabasis,simulationsofbacksiltingafterexcavationofthewaterwaywithasandbarundercomplicatedboundaryconditionsinthenavigationchannelinducedbysuspendedload,bedloadandmudbywavesandtidalcurrentsarediscussed.

简介：制图资料sourcematerial;cartographicdocument编制地图所需要的测量控制成果、地图、航片、遥感图像和文字等各种资料。根据使用程度可分为基本资料、补充资料和参考资料。制图精度mappingaccuracy地图绘制各工序,包括展绘数学基础,线划描绘和制图综合的精确程度。

简介：一个方便、有效的过程被tosylation和硅石胶化在这研究支持的随后的β-消除为酒精的变换开发到石蜡。有在在0℃的pyridine的p-toluenesulfonyl氯化物的白酒的处理负担得起在房间温度在dichloromethane或氯仿与硅石胶化经历β-消除的tosylates，产出有高生产率的石蜡。

简介：TheDiverGasRecoverySystem(DGRS)isanimportantaccessoryequipmentofthe300mSaturationDiveSystem.Thesystemfacilitatestherecyclingofthebreathinggasesfordivers,therefore,ithasgreateconomicbenefits.InApril1995,a300munmannedtestanda100mmannedtestontheHY2031DGRSwerecarriedoutsuccessively.Tenmonthslater,anothermannedtestontheHY2032DGRS

简介：AninvivofluorescencediscriminationtechniqueforphytoplanktonpopulationwasdevelopedbyusingWaveletpackettransform,clusteranalysisandnon-negativeleastsquares.Thetechniquewasusedtoanalyzewatersamplesfromdifferentsearegions.Forsimulativemixtures,whendominantspeciesaccountfor60%,70%,80%,90%atthedivisionlevel,thecorrectdiscriminationratios(CDRs)are83.0%,99.1%,99.7%and99.9%withtherelativecontentsof58.5%,68.4%,77.7%and86.3%,respectively;whenthealgaedominanceare60%,70%,80%,90%,100%atthegenuslevel,theCDRsare86.1%,94.9%,95.2%,96.8%and96.7%,respectively.Forlaboratorymixtures,theCDRsare88.1%and78.4%atthedivisionandgenuslevel,respectively.Forfieldsamples,theCDRswere91.7%and80%atthedivisionandgenuslevel,respectively(mesocosmexperiments),andtheCDRswere100%and66.7%atthedivisionandgenuslevel,respectively(JiaozhouBay).ThefluorometrictechniquewasusedtoestimatethephytoplanktoncommunitycompositionandrelativeabundanceofdifferentclassesfortheApril2010cruiseintheYellowSeawiththeresultsagreeingwiththoseinpublishedpapersbyotherauthors.