简介：今年9月，波罗的海干散货指数（BDI）持续走高、涨势惊人，该指数9月25日报收2127点，相比年初涨幅接近200％，创下自2010年10月以来近33个月新高。素来被认为是航运市场“晴雨表”的干散货指数高涨，给市场资金提供了信心支撑，航运股出现久违的攀升。然而，“无风不起浪”，如此急促的涨势仅仅靠季节性惯性增长是不足以完成的，那么还有什么隐形的推手从中发力呢？波罗的海指数还会持续飙升吗？

简介：Theobjectiveofthisworkistoanalysefatiguereliabilityofdeckstructuressubjectedtocorrelatedcrackgrowth.Thestressintensityfactorsofthecorrelatedcracksareobtainedbyfiniteelementanalysisandbasedonwhichthegeometrycorrectionfunctionsarederived.TheMonteCarlosimulationsareappliedtopredictthestatisticaldescriptorsofcorrelatedcracksbasedontheParis-Erdoganequation.Aprobabilisticmodelofcrackgrowthasafunctionoftimeisusedtoanalysethefatiguereliabilityofdeckstructuresaccountingforthecrackpropagationcorrelation.Adeckstructureismodelledasaseriessystemofstiffenedpanels,whereastiffenedpanelisregardedasaparallelsystemcomposedofplatesandarelongitudinal.Ithasbeenproventhatthemethoddevelopedherecanbeconvenientlyappliedtoperformthefatiguereliabilityassessmentofstructuressubjectedtocorrelatedcrackgrowth.

简介：综上看来，成功自由贸易（园）区的主要特点可概括为“境内关外，高度自由，便捷高效”。上海欲建自由贸易（园）区，可以在立法保障、管理体制、海关监管、金融管制、优惠政策等五大领域先行试点改革。

简介：《航海教育研究》（季刊）系航海教育研究会会刊，由中国交通运输部主管，大连海事大学主办，国内外公开发行。本刊面向交通运输部所属行业相关各管理部门、各层次航海教育院校及培训机构、港航企事业单位等，读者与作者群遍及行业内各主要单位，是国内发布和传播航海教育研究与实践成果、宣传和交流航海教育办学经验的权威平台。

简介：<正>Glasgow,UK18th-20thAugust2014AbouttheconferenceTheconferencewillbringtogetherresearchers,practitionerstoaddressthesafetyandreliabilityissuesasapplicabletodifferentstagesintheanalysis,designconstructionandin-servicelifeofmarinestructuressuchasship,offshore,submergedstructuresandtherenewableenergystructures.Thiswillinvolveadvancedanalysisbothforstrengthandloadmodelinordertoestablishsafetylevelbothfordeterministicmodel(WSDmethod)andforreliabilitybaseddesign(LRFDmethod).Oneoftheaimsofthedesignshouldbetoachieveadequatebutnotexcessivelevelofsafetywhichcanbesatisfiedthroughreliabilitybasedmethodandthistakesintoaccountuncertaintiesofdesignvariables.CurrentmoderncodesaretryingtoprovidedesignproceduresonLRFDformatalthoughnoexplicitreliabilityanalysisisdonetoarrivethesepartialsafetyfactors.Thisconferencewilldealwithalltheseissuesandseehowthesetechniquesareappliedtovarioustypesofmarinestructures.Glasgow,thevenueforthisconferenceisacitywhichhaslotofattractions.TheworldfamousLoch-LomondisonlyfewmilesawayandEdinburghis50minutesjourneybytrain.Thecitywillalsohostthe2014CommonwealthGames.

简介：文章针对我国当前胎儿无法享有民事权利这一问题，提出了一种新型胎儿民事权利制度，并说明了该制度的概念、特点和现实意义，从而有效地保护胎儿的民事权利能力。

简介：Inordertoanalyzethespatialmaneuverabilityoftheremotelyoperatedunderwatervehicle(ROV),the6-DOFmotionmathematicmodeloftheROVwasfounded.HydrodynamicswereanalyzedbyusingtheTaylorseries.ThethrustersontheROVwerediscussed.Thispaperconsidersthreecasesofmotionsimulation:verticalmotion,rotationalmotionandZ-shapemotion.Aseriesofsimulationexperimentsshowedthatthe6-DOFmotionmathematicmodelwascorrectandreliable,andalsofitwiththescenesimulation.

简介：文章通过对常规冷却系统的分析,在总结其优缺点的基础之上对其进行优化设计,改善其工作性能,使系统布置更加紧凑,维护管理也更加方便,具有很高的应用价值。

简介：针对我国青少年体质健康问题，对青少年学生参加体育锻炼行为现状进行了分析，为实施青少年体育运动的干预指导提供了依据。

简介：文中分析了港建费稽查工作的意义、现状及存在的问题，并提出了港建费稽查工作流程和相应策略，以及做好港建费稽查工作的保障措施．

简介：Thecriticaltechnicalproblemofunderwaterbottomobjectdetectionisfoundingastablefeaturespaceforechosignalsclassification.Thepastliteraturesmorefocusonthecharacteristicsofobjectechoesinfeaturespaceandreverberationisonlytreatedasinterference.Inthispaper,reverberationisconsideredasakindofsignalwithsteadycharacteristic,andtheclusteringofreverberationinfrequencydiscretewavelettransform(FDWT)featurespaceisstudied.Inordertoextracttheidentifyinginformationofechosignals,featurecompressionandclusteranalysisareadoptedinthispaper,andthecriterionofseparabilitybetweenobjectechoesandreverberationisgiven.TheexperimentaldataprocessingresultsshowthatreverberationhassteadypatterninFDWTfeaturespacewhichdiffersfromthatofobjectechoes.Itisproventhatthereisseparabilitybetweenreverberationandobjectechoes.

简介：文章在分析欧美技术贸易壁垒的基础上，认为欧美基于环境保护和产品质量标准的技术贸易壁垒的不断增强，恶化了南通外贸发展的外部环境，并提出了解决南通外贸发展在应对欧美技术贸易壁垒方面存在诸多缺陷的应对措施，以推动南通外贸持续快速健康发展。

简介：文章运用教育生态学原理以江苏沿海开发战略为背景，分析了南通外语教育生态发展存在的问题，并提出了相应的对策。该研究对促进南通外语教育的可持续发展具有一定的借鉴意义。

简介：文章依托学校网络实验环境和校园网，构建IPv6网络教学平台。一方面建立IPv4／IPv6双栈试验网，IPv6网络设备互连使用链路本地地址，IPv4则使用私有地址，分别启动ripng与ospf动态路由协议，实现校园网内部IPv4与IPv6的互联互通；另一方面搭建基于IPv6的应用服务，通过配置Apache与Bind，提供了Web及DNS服务。

简介：文章结合南通民营企业的发展现状,从政府作用、产业集群、创新能力、产业结构、产品附加值等方面探讨了民营经济发展中的存在问题,并提出了相应的对策。

简介：Wavediffractionoftwoconcentricporouscylinderswithvaryingporositywasstudiedbyusingananalyticalmethodbasedoneigenfunctionmatching.Thefluiddomainaroundthecylindersisdividedintothreesub-domainsandineachsub-domainaneigenfunctionexpansionofthevelocitypotentialisobtainedbysatisfyingtheLaplaceequation,theboundaryconditionsonthefreesurfaceandontheseabed.Theunknowncoefficientsofeigenfunctionexpansionsaredeterminedbyboundaryconditionsontheporoushulls.Inthepaper,theboundaryconditionsarebasedupontheassumptionthattheflowintheporousmediumisgovernedbyDarcy’slaw.Twoporous-effectparametersappliedontwoporouscylindersarefunctionsoftheverticalcoordinateinsteadoftheconstant.Waveloadingontheouterandinnercylinderispresentedinthenumericalresults.

简介：一、系统总体性能NAVDATA系统可以在两种单频网络（SFN）模式下运行，一种是类似于现行GMDSS中采用窄带直接印字电报技术实施航行警告、气象信息和紧急信息播发的奈伏泰斯（NAVTEX）系统运行模式，即多个陆地电台在同一频率下分时段播发，不同陆地电台可以播发不同内容的信息，但相邻时段播发的陆地电台应有至少500海里（约926千米）的地域间隔。

简介：Forstudyingthedynamicperformanceofsubseaumbilicalcablelayingsystemandachievingthegoalofcabletensionandlayingspeedcontrol,therigidfiniteelementmethodisusedtodiscreteandtransformthesystemintoarigid-flexiblecouplingmulti-bodysystemwhichconsistsofrigidelementsandspring-dampingelements.ThemathematicalmodelofsubseaumbilicalcablelayingsystemkinematicchainispresentedwiththesecondorderLagrangeequationinthejointcoordinatesystem,anddynamicmodelingandsimulationisperformedwithADAMS.Thedynamicanalysisisconductedassumingthefollowingthreestatuses:ideallaying,practicallayingunderwavedisturbance,andpracticallayingwithtensioncompensation.Resultsshowthatmotiondisturbancesofthelayingbudgeunderseawaves,especiallywithheavingandpitching,willcauserelativelyseriousfluctuationsincabletensionandlayingspeed.Tensioncompensation,i.e.,activebacktensiontorquecontrolcanrestrictcontinuoustensionincreasingordecreasingeffectivelyandrapidly,thusavoidingcablebreachorbuckling.

简介：Mostoftheinvestigationsregardingfrictionstirwelding(FSW)ofaluminumalloyplateshavebeenlimitedtoabout5to6mmthickplates.InpriorworkconductedthevariousaspectsconcerningtheprocessparametersandtheFSWtoolgeometrywerestudiedutilizingfrictionstirweldingof12mmthickcommercialgradealuminumalloy.Twodifferentsimple-tomanufacturetoolgeometrieswereused.TheeffectofvaryingweldingparametersanddwelltimeofFSWtoolonmechanicalpropertiesandweldqualitywasexamined.Itwasobservedthatinordertoachieveadefectfreeweldingonsuchthickaluminumalloyplates,toolhavingtrapezoidalpingeometrywassuitable.Adequatetensilestrengthandductilitycanbeachievedutilizingacombinationofhightoolrotationalspeedofabout2000r/minandlowspeedofweldingaround28mm/min.Atverylowandhighdwelltimetheductilityofweldedjointsarereducedsignificantly.

简介：文章探讨了能力本位下的航海英语课程体系的内涵，并从语言教学的理论层面剖析了航海英语交际能力的内在构成．提出能力本位下的航海英语课程体系构建的实践原则，最后结合《STCW公约》马尼拉修正案重新构建航海英语课程体系。