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随着现代科学技术的迅猛发展,船舶的自动化水平得到了极大的提高。港口船舶的监控系统是船舶自动化系统的重要组成部分。本文研究了物联网技术在港口船舶监控系统中的应用。本文分析了物联网技术的发展及其关键技术;研究了船舶监控系统的发展以及控制器在监控系统中的应用;讨论了港口船舶监控系统的整体架构;最后给出了监控系统中物联网技术的架构。这对于促进我国港口船舶监控系统的发展有着重要的指导作用。 相似文献
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随着网络技术的快速发展,物联网技术也得到了广泛应用。本文基于物联网技术,研究了船舶的信息系统以及QoS保障技术。本文研究了船舶的信息技术,着重分析了船舶信息系统的特点以及系统的整体结构;分析了船舶QoS保障技术的关键技术以及需求;探讨了物联网技术,最后给出了船舶信息系统物联网的整体架构。本文的研究对于我国船舶信息系统的建立有着积极的指导作用。 相似文献
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随着船舶领域信息化、数字化水平的提高,船载信息化设备产生的数据量越来越大,如船舶自动识别系统、电子海图系统等,船舶航行数据中包含大量的潜在价值信息,对船舶航行数据进行挖掘能够获取船舶航迹特征,对于海事监管、航行交通管理等有重要的作用。本文研究一种基于云计算的船舶航行数据存储与备份系统,云计算平台能够处理海量的船舶航行数据,并通过服务架构和数据库技术,将船舶的航行数据进行可靠的存储和备份。本文重点介绍云计算技术的核心内容、船舶航行数据存储系统的构成、数据库技术以及系统的软件开发关键环节,具有一定应用价值。 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