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探讨在中国海事系统建立履约管理体系必要性、基本思路和海事履约战略管理的理念,提出应对IMO审核的海事履约管理体系建设的具体建议。2009年国际海事组织第26届大会决定,IMO将于2015年起对所有会员国实施强制性的履约审核。2010年中国海事局根据中国接受IMO自愿审核的情况,决定在全国直属海事系统建立覆盖 相似文献
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本文通过国际海事组织2009年9月对我国海事履约工作的审核活动引出对RO组织和人员管理的履约探讨和研究,在国际海事组织公约系统性原则的要求下,对有关RO组织和人员管理的国际海事组织公约、决议等进行了分类分析和梳理,介绍了我国政府主管机关在针对有关国际公约基础上所采取的一些履约措施,并且在对照公约要求的前提下,分析了我国在对RO组织和人员的管理的履约工作中存在的不足和后续要推进的有关工作,提出了一些相应的建议意见或对策。希望主管机关对此引起重视并采取一些必要的措施,达到不断改进我国对RO组织及人员管理的履约工作。 相似文献
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2009年11月,我国政府将接受国际海事组织自愿审核机制评审组对我国开展的审核,有关船旗国履约效率的话题正不断升温。文中介绍了在IMO框架下船旗国的职责和义务,船旗国履约的差距以及衡量指标,并从船舶监督管理的实践出发,提出了提高我国船旗国履约效率的几点建议。 相似文献
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《关于开展IMO成员国自愿审核机制(以下简称审核机制)的决议》赋予了国际海事组织审核和评估成员国履约成效的权力,使国际海事组织由传统的“规则制定”延伸到“执行监督”。我国作为国际海事组织A类理事国有必要借助审核机制,构建完善、高效的海事管理体系,实现长效管理和可持续发展。 相似文献
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常微分方程具有一般数学的特点:抽象性、严密性,又具有本身的特点,即与工程技术紧密相连,实用性强.而常数变易法是解线性微分方程行之有效的一种方法。 相似文献
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This paper presents the uncertainty modelling of experimental results for a physical model of a tanker moored to a terminal inside a port. The physical model was built for an oil terminal at the port of Leixões in Portugal. The model incorporates the new modified port layout, as well as a future 300 m extension of the port outer north breakwater to enhance operational conditions. The physical model tests were performed on a scale of 1:80 in the Portuguese Civil Engineering Laboratory (LNEC). A generic mooring system of four mooring lines and two fenders is simulated using a nonlinear spring system. Decay tests are carried out to evaluate the natural periods of the moored model. Then, tests are carried out for the moored model in waves. The major aim of the experimental study is to obtain novel results for the wave elevation and direction at various locations inside the port, the ship motions at six degrees of freedom, and loads on mooring lines and fenders including the modified port layout. As the physical model measurements are subjected to different types of uncertainties, a systematic uncertainty analysis is carried out here, following ITTC guidelines and recommendations, to quantify all possible sources of uncertainties. The results are discussed, and several conclusions are reached. Based on the experimental results, the presented physical model study may replicate the results for waves and motions with uncertainties less than 9% of the significant amplitudes. The assessment of the applied nonlinear spring model reveals load predictions on the moorings, with uncertainties less than 4% of the maximum mooring loads. 相似文献
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麦哲伦(Magellan,Ferdinand),葡萄牙著名航海家和探险家.先后为葡萄牙(1505~1512)和西班牙(1519—1521)作航海探险。5个多世纪以来,人们对麦哲伦崇拜得很,都把他看作是世界英雄,因为他是第一个完成环球航行的航海家。这一创举实际上以无可争辩的事实证明了地圆说。从这个意义上讲,麦哲伦的确是 相似文献
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为优化某船用柴油机的燃烧室的"油-气-室"匹配,降低有害物排放,运用AVL Fire对原型燃烧室改用不同燃烧室进行额定工况模拟.结果表明,高低型双涡流室双缩口燃烧室能在上涡流室形成"飞轮效应",相对于原型燃烧室,不仅能增加功率,而且能降低Nox和SOOT的排放.对高低型双涡流室双缩口燃烧室设置不同的高低涡流室的半径比r/R和喷油夹角进行计算.结果表明:随着r/R从0.3增加到1.3,Nox和SOOT的排放量均先减少后增多;当r/R为0.7时,Nox和SOOT的排放量均最少.当喷油夹角为140°~165°时,随着喷油夹角的增大,Nox的排放量先减少后增加,随后再减少,最后又升高;SOOT排放量先减小后增大,随后再减小. 相似文献
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Characteristics of a bubble jet near a vertical wall 总被引:1,自引:0,他引:1
A numerical model of a coupled bubble jet and wall was built on the assumption of potential flow and calculated by the boundary integral method. A three-dimensional computing program was then developed. Starting with the basic phenomenon of the interaction between a bubble and a wall, the dynamics of bubbles near rigid walls were studied systematically with the program. Calculated results agreed well with experimental results. The relationship between the Bjerknes effect of a wall and characteristic parameters was then studied and the calculated results of various cases were compared and discussed with the Blake criterion based on the Kelvin-impulse theory. Our analyses show that the angle of the jet's direction and the pressure on the rigid wall have a close relationship with collapse force and the bubble's characteristic parameters. From this, the application range of Blake criterion can be determined. This paper aims to provide a basis for future research on the dynamics of bubbles near a wall. 相似文献
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