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为解决传统船舶图像增强算法应用于夜间拍摄时存在图像分辨率较低的不足,提出了基于FPGA的夜间舰船图像增强算法。引入FPGA对夜间图像的灰度调节方式进行改进,依托夜间图像的滤波处理计算以及锐化计算,完成了提出的基于FPGA的夜间舰船图像增强算法设计。实验数据表明,针对夜间拍摄图像,提出的夜间船舶图像增强算法较传统船舶图像增强算法,图像分辨率提高24.64%,适合对船舶夜间图像进行分析计算。 相似文献
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针对海量舰船图像查询速度实时性高的要求,设计了基于云平台的海量舰船图像查询算法。首先分析当前舰船图像查询的现状,指出了当前各种舰船图像查询算法存在的缺陷,然后提取舰船图像查询特征,并采用支持向量机建立舰船图像查询模型,最后结合舰船图像的大规模、海量特点,引入云平台并行实现海量舰船图像查询,并与其他舰船图像查询算法进行了仿真对比实验,本文方法可以快速实现海量舰船图像查询,舰船图像查询速度和查询正确率均显著高于对比算法,为海量舰船图像查询提供了一种新的研究工具。 相似文献
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随着科学技术的不断发展和进步,舰船光学尾迹的侦察可以变得更加精确,而通过图像处理技术可以在船舶高速航行的过程中,从不同视角进行场景的连续成像,快速辨识舰船尾迹的变化特征,从而提高整个监测系统的识别能力。本文重点对舰船光学尾迹图像信息采集工作模式和采集技术展开讨论,并对图像处理单元信息采集系统的数据处理与算法进行优化,提高了尾迹图像的监测范围,同时也大大改善了信号传输的速度,降低了外部带来的干扰。 相似文献
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舰船的红外图像检测技术有非常重要的作用。在军事领域,精确的舰船红外图像检测可以起到敌方舰船侦察、维护海上领土安全的作用;在民用领域,舰船的红外图像检索与特征分析,有助于海上航线管理和交通管理,从而提高海上运输的效率和安全性。本文针对舰船的红外图像检测技术,系统的介绍了红外成像的原理,基于向量机技术和图像处理技术,研究了舰船的红外图像检索和特性分析,并对某舰船海上红外图像进行了仿真试验。结果表明,基于向量机分类技术的舰船红外图像处理具有良好的效果。 相似文献
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《船舶与海洋工程学报》2014,(2)
正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors. 相似文献
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《船舶与海洋工程学报》2014,(4)
正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support; 相似文献
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联合作战计划和执行系统 总被引:2,自引:1,他引:1
全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划:时间不限的精密预案计划生成作战计划、方案计划或职能计划;时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础,加速应付危机的能力。 相似文献
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In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama?
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou). 相似文献
The answer is China South Port Group (Hong Kong, Shenzhen and Guangzhou). 相似文献
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Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form. 相似文献
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桥梁防撞设施物理模型试验 总被引:1,自引:0,他引:1
物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。 相似文献
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印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。 相似文献
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Gunnar Alexandersson Staffan Hultén Frode Longva 《Research in Transportation Economics》2010,29(1):212-218
Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues. 相似文献