简介:由于旅游出行全环节产业链包括油品服务和汽车后市场服务等多个环节与石化销售企业经营的油品、非油品及其他增值服务相适应;加油站消费群体与自驾出游群体高度契合,从旅游沿线加油站和旅游型服务区特征的视角,分析探索了销售企业旅游服务发展策略和旅游业务创新模式,包括新旅游环境下与销售企业的关联油品和非油业务自身发展的需要,石化销售企业具备的声誉、品牌、销售网点规模、客户与员工等优势,旅游沿线加油站和旅游型服务区建设及发展以及消费者的需要等,提出了石化销售企业发展旅游服务的策略,线下产品自营、线上平台运营、线上线下一体化、线上线下平台+特色产品的品牌发展模式,将旅游项目打造为一个产业的建议。
简介:概述道床电阻成因及对轨道电路的影响,结合大秦重载铁路的线路特点对低道床问题的影响进行分析,根据分析提出针对大秦重载铁路维护运营过程中低道床问题的处置建议,为重载铁路低道床维护提供宝贵经验。
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:由于跨江桥梁钢箱梁吊装工艺的特殊性,施工过程中对水域通航产生碍航,为避免产生船舶碰撞事故,本文以虎门二桥所跨坭洲桥梁处为横截面的船舶AIS数据为基础,针对桥梁建设中的水上交通环境在时间上划定阶段性、在空间上划定区块性进行分析,针对性提出临时交通管制、推荐航路航道转换等面向水上交通风险的对策.研究成果为海事监管部门提供了实践性指导意见,减小了对桥梁周围水域航行船舶碍航性及降低警戒力量的投入,所提出的移动安全作业区、航路转换、合理布置警戒力量等通航安全保障措施以期为同类施工作业提供基于情景案例的实践参考.