简介：AnintegratedinvestigationwascarriedoutduringlateApriltolateMayof2014inthecoastalareaofSouthJiangsuProvincetounderstandtheearlydevelopmentofgreentideintheYellowSeaanddiscoverthetemporalandspatialdistributionofgreenalgalmicro-propagulesandmacroalgaeattheearlystageofgreentide.Theresultsshowedthatgreenalgalmicro-propagulesdistributedinallstationsfromlateApriltolateMay,andmicro-propagulesofhighdensity(>300ind.L?1)concentratedintheadjacentPorphyraaquaculturearea.Floatingmacroalgaewereinitiallyobservedinthenorthernsurveyareas,andincreasedgradually.ThedominantspecieswasU.proliferainthefloatingmacroalgae,rangingbetween90%and100%.Theseawatersurfacetemperatureandsalinityintheabovementionedtimeperiodweresuitableforthegrowthofmacroalgae.ThisworkcanhelpgovernmenttostrengthenmanagementtoreducethebloomsofmacroalgaeinthecoastalareaofSouthJiangsuProvinceandalsofacilitatethedecision-makingformanagersattheearlystageofgreentide.

简介：EstimatedGreen'sfunction(EGF)betweenstationshasbeenextractedfromambientseismicnoise,directsurfacewaveandcodawaves.Itisalsoconfirmedbylaboratoryexperimentsonultrasonicsandtheoreticalderivationsassumingdiffusivewavefield,equi-partitionofmodesorrandomsourcesonanenclosedsurface.Thismethodprovidesanewapproachtostudythecrustandmantlestructureatregionalscale,continentalscaleandglobalscale.Followingtheachievementswithseismometerrecords,therecordsofinfrasonicstation,hydrophoneandmicrophonewerealsousedtoobtaintheEGFsofdifferentwavefields.Sincesuperconductinggravimeterisabetterlongperiodinstrumentthanregularseismometer,EGFatlongerperiodisexpectedtobeobtainedwiththecrosscorrelationofgravitydata.Inthispaper,wewillshowtheEGFsextractedbycross-correlationsbetweenthesuperconductinggravimetersandtheseismometers.Boththetraveltimesanddispersioncurvesobtainedfromdifferentdatatypesareconsistent.Theresultshowsthatitispossibletoretrievethedeepstructurebythecrosscorrelationofgravitydata.

简介：TosolvethenumericaldivergenceproblemofthedirecttimedomainGreenfunctionmethodforthemotionsimulationoffloatingbodieswithlargeflare,atimedomainhybridRankine-Greenboundaryelementmethodisproposed.Inthisnumericalmethod,thefluiddomainisdecomposedbyanimaginarycontrolsurface,atwhichthecontinuousconditionshouldbesatisfied.ThentheRankineGreenfunctionisadoptedintheinnerdomain.ThetransientfreesurfaceGreenfunctionisappliedintheouterdomain,whichisusedtofindtherelationshipbetweenthevelocitypotentialanditsnormalderivativefortheinnerdomain.Besides,thevelocitypotentialatthemeanfreesurfacebetweenbodysurfaceandcontrolsurfaceisdirectlysolvedbytheintegrationscheme.Thewaveexcitingforceiscomputedthroughtheconvolutionintegrationwithwaveelevation,byintroducingtheimpulseresponsefunction.Additionally,thenonlinearFroude-Krylovforceandhydrostaticforce,whichiscomputedundertheinstantaneousincidentwavefreesurface,aretakenintoaccountbythedirectpressureintegrationscheme.Thecorrespondingnumericalcomputercodeisdevelopedandfirstusedtocomputethehydrodynamiccoefficientsofthehemisphere,aswellasthetimehistoryofashipwithlargeflare;goodagreementisobtainedwiththeanalyticalsolutionsaswellastheavailablenumericalresults.ThenthehydrodynamicpropertiesofaFPSOarestudied.Thehydrodynamiccoefficientsagreewellwiththeresultscomputedbythefrequencymethod;theinfluenceofthetimeintervalandthetruncatedtimeisinvestigatedindetail.

简介：ThederivationofGreenfunctioninatwo-layerfluidmodelhasbeentreatedindifferentways.Inatwo-layerfluidwiththeupperlayerhavingafreesurface,thereexisttwomodesofwavespropagatingduetothefreesurfaceandtheinterface.ThispaperisconcernedwiththederivationofGreenfunctionsinthethreedimensionalcaseofastationarysourceoscillating.Thesourcepointislocatedeitherintheupperorlowerpartofatwo-layerfluidoffinitedepth.Thederivationiscarriedoutbythemethodofsingularities.Thismethodhasanadvantageinthatitinvolvesrepresentingthepotentialasasumofsingularitiesormultipolesplacedwithinanystructuresbeingpresent.Furthermore,experienceshowsthatthesystemsofequationsresultedfromusingasingularitymethodpossessexcellentconvergencecharacteristicsandonlyafewequationsareneededtoobtainaccuratenumericalresults.Validationisdonebyshowingthatthederivedtwo-layerGreenfunctioncanbereducedtothatofasinglelayeroffinitedepthorthattheupperGreenfunctioncoincideswiththatofthelower,foreachcase.Theeffectofthedensityontheinternalwavesisdemonstrated.Also,itisshownhowthesurfaceandinternalwaveamplitudesarecomparedforboththewavemodes.Thefluidinthiscaseisconsideredtobeinviscidandincompressibleandtheflowisirrotational.

简介：格林macroalgaeChaetomorphaaerea和C。linum分类地被糊涂。在这份报纸，我们试试词法、分子的分析分开这二种。C。aerea和C。linum能与词法characteritics被区分开来，例如复叶尺寸，房间尺寸和形状，他们的吝啬的长度/宽度比率(LWR)，和房间围收缩。C的Thalli。aerea由顶往底地稀释与在上面的部分的直径270-500m，在中间的部分的160-360m，在基础部分的100-160m。为上面的部分，房间的长度是不到他们的直径。房间墙通常在隔膜压缩，它透明或无色并且给细丝beaded外观。相反，C的thalli。linum经常在一样的个人，以内有90-300m的一条经常的直径房间墙通常不压缩，房间是圆柱的或塑造的桶。LWR比C的大。aerea。结果证明在二种之间的pairwise距离为它的区域是为18SrRNA基因和53.5%-54.3%的3.6%-3.7%。在发展史，他们在远clades散布，它在分子的水平证实基因分叉。另外，词法数据显示C的那条细丝直径。linum样品是高度可变的，从90m到300m。然后这二种能被看作分开种类。

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简介：TwostrainsofgreenmicroalgaeC.reinhardtiandC.pyrenoidosawereexaminedfortheirbiosorptionofMn2+,Fe2+,Co2+,Ni2+,Cu2+,Zn2+,andCd2+fromaqueousmulti-metalsolutions.Awiderangeofbiosorptioncapacitiescanbeobservedduetodifferentstrainsofmicroalgaeanddifferentspeciesoftracemetals.Thischaracteristicwasascribedtothedistinctcomponentsandstructuresofalgalcellwallsandthedifferentphysicochemicalpropertiesoftracemetals,suchasatomicweightandiondensity.C.pyrenoidosashowedhigheruptakecapacitiesthanC.reinhardtiandbothofthemhadapreferencefortheuptakeofcadmiumoverothersinthetracemetalsolution,suggestingtheycanbeagoodbiomaterialforbiosorptionofcadmium.Livemicroalgalcellsdisplayedamorecomplexsorptionprocessthandeadmicroalgalcellsbecauseofcellassimilation.

简介：自从2007，Ulvaprolifera在黄海引起的巨大的绿潮每夏天发生了并且为本地政府引起了巨大的经济损失。Subei(诺思江苏省，中国)浅与它的大规模Porphyra水产业，被认为是U的最重要的来源。为绿潮的prolifera。揭示在西南的黄海在这个区域，水流的特征，温度，咸度和推迟的微粒物质(SPM)漂浮和漂流的水藻的物理机制，特别在Subei浅，被学习。光线的沙的地形学在Subei隆起浅抑制水流和原因网的特征纵、纬度的运动。纵的网运动是能带U的一个主导的动态因素。prolifera进近海流水。被水藻在光合作用期间生产的气体的数量决定是否U。在它从Porphyraaquacultural仪器被处理进水以后，prolifera能漂浮很好在海表面上。Subei浅被高混浊描绘，它能导致重要轻变细并且和U的快活影响光合作用。水里的prolifera。根据从2012的卫星遥感数据，在Subei的three-month-averaged表面SPM(4月，5月和6月)浅是140mg/dm3,和Subei的北方浅(34.5的北方

简介：BasedonthesolutionsoftheGreen'sfunctionforasaturatedporousmediumobtainedbytheauthors,andusingtransformationofaxisymmetriccoordinates,Sommerfeldintegralsandsuperpositionoftheinfluencefieldonafreesurface,theauthorshaveobtaineddisplacementsolutionsofasaturatedporousmediumsubjectedtoatorsionalforceinahalf-space.Therelationshipcurvesofthedisplacementsolutionsandvariousparameters(permeability,frequency,etc.)underactionofaunitoftorquearealsogiveninthispaper.TheresultsareconsistentwithpreviousReissner'ssolutions,whereatwo-phasemediumdecaystoasingle-phasemedium.Thesolutionisusefulinsolvingrelevantdynamicproblemsofatwophasesaturatedmediuminengineering.

简介：回顾了作为实用天文学和大地测量学中基本研究课题之一的大气折射映射函数研究的进展。介绍了近几年上海天文台发展的大气折射母函数方法，以及由此导出的大气折射解析解。对如今广泛地应用在空间测量技术中的几种映射函数做出评述；分析了NMF模型的优点和不足之处。介绍了由大气折射母函数方法引出的大气延迟新连分式映射函数和天文大气折射的映射函数方法。利用VLBI实验中高度截止角与基线长度重复率的关系、探空气球(radiosonde)观测资料、PRARE资料比较了各种映射函数的结果。特别指出了映射函数方法对天文大气折射和光学波段测距精度的改进。讨论了大气折射计算中的主要误差源。

简介：Laminariajaponica,Undariapinnatifida,Ulvalactuca,GrateloupiaturuturuandPalmariapalmataaresuitablespeciesthatfittherequirementsofaseaweed-animalintegratedaquaculturesystemintermsoftheirviablebiomass,rapidgrowthandpromisingnutrientuptakerates.Inthisinvestigation,theresponsesoftheoptimalchlorophyllfluorescenceyieldofthefivealgalspeciesintumbleculturewereassessedatatemperaturerangeof10~30℃.TheresultsrevealedthatUlvalactucawasthemostresistantspeciestohightemperature,withstanding30℃for4hwithoutapparentdeclineintheoptimalchlorophyllfluorescenceyield.WhilethearcticalgaPalmariapalmatawasthemostvulnerableone,showingsignificantdeclineintheoptimalchlorophyllfluorescenceyieldat25℃for2h.Thecold-waterspeciesLaminariajaponica,however,demonstratedstrongabilitytocopewithhighertemperature(24~26℃)forshortertime(within24h)withoutsignificantdeclineintheoptimalchlorophyllfluorescenceyield.Grateloupiaturuturushowedageneraldecreaseintheoptimalchlorophyllfluorescenceyieldwiththerisingtemperaturefrom23to30℃,similartothetemperatekelpUndariapinnatifida.Changesofchlorophyllfluorescenceyieldsofthesealgaewerecharacterizeddifferentlyindicatingtheexistenceofspecies-uniquestrategytocopewithhighlight.Measurementsoftheoptimalchlorophyllfluorescenceyieldaftershortexposuretodirectsolarirradiancerevealedhowlongtheseexposurescouldbewithoutsignificantphotoinhibitionorwithpromisingrecoveryinphotosyntheticactivities.SeasonalpatternofalternationofalgalspeciesintankcultureintheNorthernHemisphereatthelatitudeof36°Nwasproposedaccordingtothesebasicmeasurements.

简介：这研究分析社区结构，水藻的数量变化和重要环境因素的效果并且在调查区域估计依附的绿水藻的全部的生物资源。从Porphyrayezoensis水产业椽子上的依附的绿水藻的调查的学习使用数据和关于到在Subei的2011年4月的从2010年10月的环境因素的数据变浅。椽子上的依附的绿水藻包括了Ulvaprolifera，Capsosiphongroenlandicus，U。linza，U。intestinalis，U。clathrata，和U。compressa。依附的绿水藻的生物资源变化展出了一根转换抛物线：生物资源最高(14898t)在4月，并且第二最高(2034t)在11月；它在2月(仅仅729t)是最低的并且从三月严厉地增加了到4月。种类差异在季节之中显著地不同。在9月和10月，什么时候P。yezoensis水产业椽子开始被建立，，依附的绿水藻从12月有高生物多样性到下一2月，，许多绿水藻种类在椽子上共存了生物资源是低的，并且从三月到4月作为严厉地增加的生物资源，种类差异落下到最小。在期间这次，C。groenlandicus与直到80%的最大的生物资源比例是显然主导的，当时U。prolifera比例指数地增加了到20%～40%。水温度在生物资源和依附的绿水藻的种类继任上有直接调整效果。社区动力学的评价和绿水藻的生物资源提供了需要在南部的黄海追踪大规模绿潮的起源的证据。

简介：一、引言AutoLisp作为AutoCAD内嵌的解释性编程语言，具有方便灵活的特点，为用户以AutoCAD为通用平台进行定制提供了很大方便。但是AutoLisp语言本身的功能在某些方面还有些欠缺，在我们编程实践中，我们发现有些子程序在实际应用中要经常用到，

简介：ThisstudyproposesaGreen’sfunction,anessentialrepresentationofwater-saturatedgroundundermovingexcitation,tosimulategroundbornevibrationfromtrains.First,generalsolutionstothegoverningequationsofporoelasticmediumarederivedbymeansofintegraltransform.Secondly,thetransmissionandreflectionmatrixapproachisusedtoformulatetherelationshipbetweendisplacementandstressofthestratifiedground,whichresultsinthematrixoftheGreen’sfunction.ThentheGreen’sfunctioniscombinedintoatrain-track-groundmodel,andisverifiedbytypicalexamplesandafieldtest.Additionalsimulationsshowthatthecomputedgroundvibrationattenuatesfasterintheimmediatevicinityofthetrackthaninthesurroundingarea.Thewavelengthofwheel-railunevennesshasanotableeffectoncomputeddisplacementandporepressure.Thevariationofvibrationintensitywiththedepthofgroundissignificantlyinfluencedbythelayeringofthestratasoil.WhenthetrainspeedisequaltothevelocityoftheRayleighwave,theMachconeappearsinthesimulatedwavefield.TheproposedGreen’sfunctionisanappropriaterepresentationforalayeredgroundwithshallowgroundwatertable,andwillbehelpfultounderstandthedynamicresponsesofthegroundtocomplicatedmovingexcitation.

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简介：利用中国613个站点1961~2010年逐月降水数据,基于游程理论从月标准化降水指数（SPI）序列中分离出干旱事件,并通过K-S检验方法对其干旱强度和干旱历时2个特征量的分布函数进行检验。在此基础上,利用Copula函数建立2个特征量的二维联合概率分布函数,对比分析干旱历时分布函数修订前后对不同类型干旱联合概率及重现期的影响。结果表明：干旱强度特征量符合Gamma分布,而干旱历时特征量并非完全符合指数分布,因此需对干旱历时分布函数进行必要的修订。在干旱历时分布函数修订情况下,大部分干旱类型的联合概率减小,少部分干旱类型的联合概率增大;且不同类型干旱的联合重现期增大。在干旱历时尺度相同时,随着干旱强度的增加,最大和最小联合重现期的差异无明显变化;但在干旱强度相同时,最大和最小联合重现期的差异随着干旱历时的增加而明显增大。

简介：本文客观定量地计算了庆阳地区８县（市）的春旱指数，分析了其时空分布特征，用均生函数模型建立了春旱分片预测方法，历史回代及业务应用效果理想。

简介：一、引言众所周知，对岩层移动观测资料进行分析处理，计算每一特定地质采矿条件下移动盆地主断面上移动和变形分布是在矿山开发中一项极为重要的工作，进行此项工作的方法很多，在我国目前常用的有典型曲线法，指数函数法和概率积分法三种。由于岩移问题的复杂性比如地质采矿条件的千变万化，所选用的数学模型的不合理性等原因，不能否认现有的移动和变形予计方法所得的予计值和实际值之间存在较大的差异。

简介：摘要 : Volterra核函数辨识是一种非线性系统模型，能够良好的应用于结构损伤检测，对于现代机械工程的发展起到了非常重要的作用。本文笔者对 Volterra核函数辨识下结构损伤检测进行分析研究，文章中对 Volterra级数进行详细的分析阐述，并提出 Volterra核函数辨识在结构损伤检测当中的具体应用过程。

简介：试井分析中，在不满足生产流动时间远远大于关井压力恢复时间的条件下，开关井测试时间较短，或生产段井底流压资料缺失，均导致对压力恢复数据出现不合理的解释。开关井测试时间较短，可以联立压降段和压恢段引入反褶积方法解释；生产段井底流压资料缺失，可以补充到多个离散流压资料点联立压恢段解释。该方法在渤海油田取得了较好的应用效果，具有一定的推广价值。