共查询到20条相似文献,搜索用时 750 毫秒
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<正>本刊从天津港集团公司获悉,天津港正在实施全自动智能化集装箱码头建设、码头绿色低碳示范工程、绿色能源管理体系等多项重点工程,计划投资数十亿元建设30余个项目,到2017年将基本建成资源节约型、环境友好型的绿色低碳港口。 相似文献
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天津港是我国最大的人工海港,是我国对外贸易的重要口岸。2007年天津港吞吐量达3亿吨,今天天津港一天的吞吐量比1952年重新开港时全年的吞吐量还要多;现在天津港陆域面积达到53平方公里,比重新开港时扩大了40倍;如今天津港航道水深-19.5米,比重新开港时浚深了3倍多:今天,天津港拥有水、陆域面积近200平方公里, 相似文献
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2009年11月6日,天津港汇盛码头有限公司合资合同在天津港(集团)有限公司正式签署。这标志着天津市20项重大交通项目之一的天津港北港池杂货码头工程建设,已成功引入“战略合作伙伴”——康因投资控股有限公司,与天津港集团打造这座目前国内规模最大的杂货码头。 相似文献
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一位普通的工人技师,在34年的工作中,敢于拿港口的洋设备“开刀”,主持开展技术革新130多项,为单位创造效益8400多万元,两次被评为全国劳动模范,两次荣获天津市特等劳动模范称号。拥有“知识型产业工人”、“蓝领专家”、“港口工人的坐标”、“排障专家”等众多赞誉。他就是天津港(集团)公司煤码头有限责任公司操作一队队长孔祥瑞。 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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