简介：文中借鉴《2003年海员身份证件公约》的实施经验以及海员身份证件的改进措施,建议改进现行海员证,参照适用通用的国际标准,通过采用生物识别、数字签名、非接触式芯片等现代技术提升我国海员证的安全性和验证效率,为持续保持海员证的适用性和通用性提供保证。

简介：2009年底充满了激辩和僵持的哥本哈根气候大会虽未达成有约束力的协议，但低碳、减排等词汇已深入人心，低碳经济正逐步成为抢占结构调整制高点的关键。

简介：Basedontheprincipleofimpedancemismatching,theperformanceofrigidvibrationisolationmassinimpedingvibrationwavepropagationwasdiscussedfromtheperspectiveofwaveapproach.BasedonFEM,theinfluenceofitsweightaswellasthecross-sectionshapeparametersontheisolationperformanceofrigidvibrationisolationmasswasstudiedthroughnumericalsimulation.Theresultsshowthatrigidvibrationisolationmasscaneffectivelyimpedethepropagationofthemediumandhighfrequencyvibrationwaves,andtheheavierthevibrationisolationmass,thebettertheisolationperformance.Forlowfrequencywaves,thevibrationisolationeffectisnotsoobvious;forarectangularvibrationisolationmass,theisolationperformancecouldbeeffectivelyimprovedbyincreasingthecross-sectionheightandreducingthecross-sectionwidth.Ausefulreferencewasprovidedfortheapplicationofrigidvibrationisolationmassestothevibrationisolationandnoisereductionofshipstructure.

简介：介绍了一种基于Spalding公式拟合的脊状表面减阻测试方法，相比于用天平等测力设备测试的方法，其优点在于简便实用，从应用实例来看，准确性也是令人满意的．由于该方法依靠的数据基础是壁面边界层内层速度分布，因此，速度分布测量的准确程度是影响该方法测试结果准确与否的决定因素．

简介：2017年3月31日，波罗的海干散货运价指数（BDI指数）报收于1297点，刷新2014年以来新高。摩根士丹利认为，干散货市场已经渡过最严酷的寒冬，目前逐渐开始转向盈利：并且将在2018年末迎来这一波牛市的顶峰。

简介：Inconsideringthetheoryofstructuraldynamicoptimizationdesign,adesignmethodofthestructuralstyleofshipcompositebracewithrigidvibrationisolationmasswasstudied.Twokindsofstructuraldynamicoptimizationformulationsminimizingthevibrationaccelerationofthenon-pressurehullontherestrainingconditionofthegrossweightoftheshipcabinwereestablished:1)dynamicoptimizationofthesectionaldimensionsoftherigidvibrationisolationmassinthecompositebrace;2)dynamicoptimizationofthearrangingpositionoftherigidvibrationisolationmass.Throughtheoptimizationresults,sectionaldimensionsandthearrangingpositionoftherigidvibrationisolationmasswithbetterperformanceinreducingvibrationweregained,andsomereferencewasprovidedforpracticalengineeringdesignsaswellasenrichmentofthedesignmethodofanovelshipvibration-isolationbrace.

简介：Rigidblockingmassesarelocatedinthetypicalbasestructureofapowercabinbasedontheimpedancemismatchprinciple.Bycombiningtheacoustic-structuralcouplingmethodandstatisticalenergyanalysis,thefull-bandvibrationandsoundradiationreductioneffectofvibrationisolationmasseslocatedinabasestructurewasresearched.Theinfluenceoftheblockingmass’cross-sectionsizeandshapeparametersandthelayoutlocationofthebaseisolationperformancewasdiscussed.Furthermore,theeffectivenessofrigidvibrationisolationdesignofthebasestructurewasvalidated.Theresultsshowthatthemediumandhighfrequencyvibrationandsoundradiationofapowercabinareeffectivelyreducedbyablockingmass.Concerningweightincrementandsectionrequirement,suitablyincreasingtheblockingmasssizeandsectionheightandreducingsectionwidthcanresultinanefficiency-costratio.

简介：文章对某2000t自升式风电安装平台的起重机特点进行了分析,阐述了其性能参数,设计了该型起重机吊具系统,并提出了起重机制作相关要求,为此类复杂起重平台的设计和建造积累了经验。

简介：东方风来满眼春.11月5日至10日,以“新时代,共享未来”为主题,史无前例的首届中国国际进口博览会吸引了世界的眼球.在总面积达30万平方米的展厅内,演绎着“广结良缘,满载而归”的精彩故事：172个国家、地区和国际组织参会,3617家企业参展,80多万人进馆洽谈采购、参观体验,按一年计,累计意向成交578.3亿美元.

简介：在国家卫生城市、国家园林城市、全国十大内河港口常熟,有一支活跃在长江黄金水道、默默奉献青春热血的海事青年队伍,他们以扎实专业的技术素养、献身海事的敬业精神、锐意进取的青春朝气、务实清廉的工作作风,赢得了广大船民、港航企业和社会各界的高度认可。这支优秀的海事青年队伍就是——常熟海事局政务中心。