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简介：文章采用逐次分层拟合法数控加工原理,结合宏程序及其嵌套编制了变节距椭圆异形螺纹的加工程序,并经实践得以验证,该编程方法对其它异形螺纹件的数控加工具有借鉴意义。

简介：当地时间2014年3月31日，中海集团与马士基集团在布鲁塞尔签署了关于比利时泽布吕赫码头投资及相关合作协议。作为中比双方经贸合作成果的重要组成部分，习近平主席出席仪式。

简介：2010年盛夏，烈日炎炎，骄阳似火。《中国海事》杂志跨越了五年的公开发行历程，迎来了期刊五周岁生日。今天，我怀着激动的心情，与您一起见证这一历史时刻，与您一起分享这份收获的喜悦，与您一起感受久违的荣耀和自豪!

简介：近日,由宁波市港航管理局定制研发的“宁波甬江渣土码头船舶规范装载管理系统”APP软件正式启用.港航管理局执法人员只需要在手机端打开该APP软件,就可以实时查看或复查辖区内水运码头的工程船舶运行情况：有多少条船当天将离港出海,船舶实际装载情况如何,是否存在超载嫌疑,系统上一目了然.

简介：Stronghydrodynamicinteractionsduringtheside-by-sideoffloadingoperationbetweenfloatingliquefiednaturalgas(FLNG)andliquefiednaturalgascarrier(LNGC)caninducehighrisksofcollision.Theweathervaneeffectofasingle-pointmooringsystemnormallyresultsinthesatisfactoryhydrodynamicperformanceoftheside-by-sideconfigurationinheadseas.Nevertheless,thechangesinwavedirectionsinrealseaconditionscansignificantlyinfluencetherelativemotions.Thisarticlestudiestherelativemotionsoftheside-by-sidesystembyusingthetheoreticalanalysismethodandthenumericalcalculationmethod.Basedonthethree-dimensionalpotentialtheorymodifiedbyartificialdamping-lidmethod,thefrequency-domainhydrodynamiccoefficientscanbeimprovedtocalculatetheretardationfunctionsforthemulti-bodyproblem.Anin-housecodeisthendevelopedtoperformthetime-domainsimulationoftwovessels,throughwhichtherelativemotionsaresubsequentlyobtained.Arangeofobliquewavesarechosenfortheextensivecalculationofrelativemotionsbetweenthetwovessels,whicharefurtheranalyzedintermsofthephaseshiftofmotionresponsesinducedbyspecificresonantwavepatterns.Investigationresultsshowthatwavedirectionshaveasignificantinfluenceontherelativesway,roll,andyawmotions.Underthecircumstancethattheabsolutephaseshiftbetweentherollmotionsoftwovesselsapproaches180°,strongerrelativemotionsareinducedwhenLNGCisontheweatherside.Moreover,thegapwaterresonancesathighfrequenciestendtocausethedangerousopposedoscillationoftwovesselsintheswayandyawmodes,whereasFLNGreducesthegapwaterresonancesandrelativemotionswhenlocatedontheweatherside.

简介：7月16日上午，交通运输部副部长徐祖远一行在浙江海事局党组书记黄大斌等领导陪同下，视察了舟山海事局政务中心和指挥中心，亲切看望了舟山海事局干部职工。徐祖远指出，海事工作一定要服务船员、服务船东、服务老百姓。