简介：Tofulfiltheneedofdevelopmentofoffshoreoilfloatingproductionsystem,theperformanceofturretassemblyinaninboardturretmooringsystemhasbeeninvestigatedinthepaper.Bymeansofsystematicevaluation,theoptimalstructureoftheturretforsingle-pointmooringsystemshasbeendetermined.Throughmodeltestsofaturretmooringsystem,severalgroupsofdatasuchasforces,momentsanddisplacementsunderdifferentenvironmentalconditionshavebeenobtained.Stressesandstrainsoftheturretstructurehavebeencalculatedbymeansofthefiniteelementmethodcorrespondingtothesituationinthemodelexperiment.Thestudyshowsthattheselectedturretstructureandthedesignedturretassemblyaretechnicallyfeasible.

简介：Microsatellitesorsimplesequencerepeats（SSR）functionwidelyandlocatedependentlyingenome.However,theircharacteristicsareoftenignoredduetothelackofgenomicsequencesofmostspecies.Kelp（Saccharinajaponica）,abrownmacroalga,isextensivelyculturedinChina.Inthisstudy,thegenomeofS.japonicawassurveyedusinganIlluminasequencingplatform,anditsmicrosatelliteswerecharacterized.Thepreliminarilyassembledgenomewas469.4Mbinsize,withascaffoldN50of20529bp.Amongthe128370identifiedmicrosatellites,90671,25726and11973werefoundinintergenicregions,intronsandexons,averaging339.3,178.8and205.4microsatellitesperMb,respectively.ThesemicrosatellitesdistributedunevenlyinS.japonicagenome.Mononucleotidemotifswerethemostabundantinthegenome,whiletrinucleotideoneswerethemostprevalentinexons.Themicrosatelliteabundancedecreasedsignificantlywiththeincreaseofmotifrepeatnumbers,andthemicrosatelliteswithasmallnumberofrepeatsaccountedforahigherproportionoftheexonsthanthoseoftheintergenicregionsandintrons.C/G-richmotifsweremorecommoninexonsthaninintergenicregionsandintrons.ThesecharacteristicsofmicrosatellitesinS.japonicagenomemayassociatewiththeirfunctions,andultimatelytheiradaptationandevolution.Amongthe120140pairsofdesignedmicrosatelliteprimers,approximately75%werepredictedtobeabletoamplifyS.japonicaDNA.Thesemicrosatellitemarkerswillbeextremelyusefulforthegeneticbreedingandpopulationevolutionstudiesofkelp.

简介：RecentbathymetricchangesintheChangjiangEstuaryundertheinfluenceofartificialregulationengineeringsandbasinreservoirshavebeenanalyzedbasedonthemaritimechartssince1997andrecentfieldworks.Theresultsindicateaslighterosionofthechannelsintheupperandmiddleestuary,continuingdepositionandseawardmoveofthemouthbarcrestandintensifyingerosionatthenearshoreseabed.Itisnoteworthythatthemorphologicalevolutioncausedbyintensivehumanactivitiesdominatesoverthechangesfromnatureprocess.First,theriverbesareerodedoverallintheSouthBranch(SB),theSouthChannel(SC)andtheupperandmiddlereachesoftheNorthChannel(NC).Thenearshoreseabedoutsidetherivermouthisbeingerodedslightly,whichisattributedtothedecliningsedimentsupplyfromtheChangjiangBasinduetotheconstructionoftheThreeGorgesDamupstream.Thesedimentabovetheseabedisveryactiveandcoarsened,meanwhile,sandwavesarebecomingmoredistinct.Second,adepositionoccursintheNorthBrach(NB),themouthoftheNC,themouthbarsoftheNorthPassage(NP)andtheSouthPassage(SP)andespeciallythemainchanneloftheNP,whereitshowsamassivesiltationafterthedeepwaterwayproject.Thereasonsfortherecentchangesarenotonlythedynamicstructureinestuarinemouthbars,butalsothesupplyofsedimentresuspensioninalocalandoffshorearea.Meanwhile,thesevereerosionandsiltationinsomereachesisrelatedtotheconstructionofestuarineengineerings.ItisindicatedthattheChangjiangEstuaryisgraduallyself-adjustedandadaptingtothevaryingnaturalfactorsandintensivehumanactivities.Thestudyonthemechanismofself-regulationoftherecentbathymetricchangesintheChangjiangEstuaryhasimportantandpracticalsignificance.

简介：这篇论文为基于的自我类似论述一个便宜方法由使用高度和反照率地图真实世界的3D表面质地编辑。编辑的基于的2Dtexture接近仅仅做变化到象素颜色或紧张的不同自我类似珍视，这种技术也允许表面几何学和捕获的3D表面质地的反射到用原版不同于那些的照明条件和视场角是ited和relit。在一个给定的地点的单个编辑操作影响所有类似的区域并且在在不同条件下面显示的样品的所有图象上生产变化。后来，表面高度和反照率地图能被用来描述海床地形学和地质的特征，它在许多海洋的进程起重要作用，建议方法能有效地关于海洋的现象的可视化和模拟在应用程序被采用。