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散货船具有较低的运输成本,且运输航线非常的灵活,因此是内河和海上航运的重要组成部分。散货船的特点是货物多种多样,且货物的重量和体积也各有不同,为了满足散装船在作业过程中的稳定性和安全性,必须要对散货船的配载进行合理的计算。传统的散货船配载计算主要是人工方式,这种方式会导致散货船配载计算的精度较差。本文研究了一种基于数据库技术的散货船自动配载系统,通过建立散货船的稳定性模型,结合My SQL数据库技术提高了散货船的配载能力。 相似文献
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介绍散货船当前的状况和存在的隐患及单壳体散货船和双壳体散货船的优缺点;同时对散货船船型的未来发展趋势进行了分析,提出控制船体结构重量,确保载重量指标,优化船体结构,增大舱容等优选型双壳散货船的设计特点。 相似文献
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日本大灵便型散货船的最新设计特点 总被引:1,自引:1,他引:0
此文简单回顾了1999年散货船的新造船市场,并以大灵便型散货船(Handymax Bulk Carrier)为例,重点从技术角度分析了日本船厂在散货船方面的设计特点,总结了日本船厂在1999年散货船市场获得大量订单的原因。 相似文献
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《中国远洋航务公告》2012,(8):12-12
据0Iarkson统计,2012年1~6月,散货船完工量为656艘、5611万DWT。尤其是巴拿马型散货船的完工量同比剧增。同期,散货船的拆船量为266艘、1621万DWT。2011年,散货船的完工量及拆船量都创下历史新高,而今年除了大灵便型散货船外,散货船的完工量又达到了空前规模。 相似文献
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介绍了我国港口资源的整合现状,指出港口整合可以提升港口的形象和地位,也为区域经济和城市的发展注入强大的动力。最后指出在港口资源整合中要避免的几个问题。 相似文献
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广州集装箱码头的轮胎式场桥小车制动器使用10多年后,出现了许多问题,故进行了改造.分析了轮胎式集装箱龙门起重机小车制动器的主要故障现象,提出了改造方案,并加以实施. 相似文献
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本文对现有的选定球面轴承的三种工程方法进行了分析比较.引入了“合力系数”,并给出了合力方向上投影面积的精确解. 相似文献
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分析柴油机故障中常见的机体裂纹故障原因,认为由于设计缺陷和管理及操作不当,易造成船舶柴油机缸体上的裂纹多发生在气缸套凸肩处。如不及时处理这些裂纹和故障,就会造成缸套的裂纹直至出现缸套漏水等严重后果,针对NANTAIQUEEN轮柴油机对该类型故障的检修提出具体措施。 相似文献
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The hydrophysical and hydrochemical structure of the Sea of Azov, with developed bottom anoxia, was studied during the RV “Akvanavt” cruise from July 31 to August 03, 2001. The anoxic zone with a thickness from 0.5 to 4 m above the bottom was found in all deep regions of the Sea. Concentrations of hydrochemical parameters were similar to the pronounced anoxic conditions (about 90 mmol m− 3 of hydrogen sulfide, 17 mmol m− 3 of ammonia, 6 mmol m− 3 of phosphate, 7 mmol m− 3 of total manganese). The hydrophysical structure was characterized by the uniform distribution of temperature in the upper 6–7 m mixed layer (UML). Below this a thin (0.4–0.8 m) thermocline layer was observed, just above the anoxic waters. Formation of this phenomenon was connected with that summer weather conditions. Intensive rains led to increased influx of river waters in June. That resulted in large input of allochtonous organic matter (OM) and inorganic nutrients; the latter were consumed on the additional autochthonous organic matter production. In July the weather was characterized by a significant rise in the daily averaged air temperature and large oscillations of temperature during the day. In this period a wind of constant direction was absent, but wind bursts were observed. The completed analyses showed that the formation of such a structure could be connected with the following factors: (i) positive growth trends of the daily averaged temperature and the daily oscillations of temperature, (ii) presence of wind bursts. The joint action of these factors resulted in the formation of the UML. The amplitude of wind bursts determined the depth of UML, and the value of trend determined the value of the temperature change in the thermocline. An initial presence of bottom halocline (caused by the Black Sea water influx to the bottom of the Sea of Azov) prevented the heating of the bottom layer and therefore led to an increase of vertical gradient of temperature in the thermocline. The spatial distribution of the turbulent exchange coefficient confirmed the existence of a “stagnation” area located above the anoxia zone, which is also, apparently, the reason for its occurrence. 相似文献
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