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针对舰船数字化系统设计特点,应用MPLS技术、分布式数据库实时控制网络技术及CORBA技术等网络和软件集成技术,构建一个双网络环境的舰船数字化系统。首先提出了舰船数字化系统的总体结构,并在分布式数据库实时控制网络和MPLS信息管理网络的双网络基础上,利用CORBA代理服务来实现系统的软件集成,从而将舰船数字化系统的各个分系统集成为一个整体,以解决舰船信息管理和控制一体化问题。 相似文献
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为了提高对舰船通信网络异常识别能力,提出基于数据驱动的舰船通信网络异常行为检测方法。采用最短路径和最大覆盖范围寻优方法构建舰船通信网络的节点覆盖模型,通过最小间隔均衡技术对舰船通信网络的信道均衡控制,提取舰船通信网络的信道传输信息特征。对舰船通信网络的行为特征参数分析,结合谱分量融合和融合聚类处理方法,实现对舰船网络异常行为的数据驱动控制。根据数据驱动的图模型参数识别和异常谱特征聚类分析,实现对舰船通信网络异常行为检测。测试结果表明,该方法能够进行舰船通信网络异常行为检测处理,提高信道均衡性能 相似文献
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对用户访问舰船通信网络的权限进行控制能够有效保证船舶信息安全,但随着非法用户入侵手段的升级,传统舰船通信网络访问权限控制方法不能准确甄别用户是否有访问权限,准确率较低。针对上述问题,提出基于大数据分析的舰船通信网络访问权限控制方法。首先利用大数据分析技术对用户角色进行准确划分,然后根据角色划分赋予相对应的访问权限,实现舰船信息的安全访问。结果表明:与传统舰船通信网络访问权限控制方法相比,基于大数据分析的舰船通信网络访问权限控制方法能准确判断出用户的访问权限,访问权限控制的准确率提高了12%,极大减少了非法访问事件的发生概率。 相似文献
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舰船网络通信技术分析与建议 总被引:1,自引:1,他引:0
舰船网络通信技术是舰船指挥与控制系统的关键技术之一。随着通信技术的快速发展,国外舰船指挥与控制系统近年来也不断地升级换代。通过对几种主流舰船通信网络技术进行分析与比较,针对舰船通信网络技术的发展趋势,提出适合我国舰船通信网络技术的建议。 相似文献
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网络异常直接关系着舰船通信的安全,为了准确对舰船通信网络异常数据进行检测和定位,设计了基于数据挖掘技术的舰船通信网络异常数据弱关联定位技术。首先对舰船通信网络异常数据的定位现状进行分析,指出当前定位技术的不足,然后引入数据挖掘技术对舰船通信网络异常数据变化特点进行刻画,实现舰船通信网络异常数据的弱关联定位,最后采用标准舰船通信网络异常数据集进行有效性测试。结果表明,本文技术可以获得高精度的舰船通信网络异常数据定位结果,而且舰船通信网络异常数据定位误差远远小于当前其他技术,具有十分显著的优越性,研究结果具有一定的理论和实际价值。 相似文献
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为了对网络安全进行的研究,我们提出了网络信息系统的安全评估方法。文章首先介绍了网络安全评估技术的基本知识,然后对安全评估模型进行了分析计算,阐述了网络安全技术措施的有效性;最后对网络安全态势的评估给出了具体的算法和公式。通过该文的技术研究,使读者对网络信息系统的安全评估技术有了初步的了解。 相似文献
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基于面向对象技术的舰船综合电力系统电力网络故障模拟及拓扑跟踪 总被引:1,自引:0,他引:1
针对舰船综合电力系统电力网络结构特点,本文实现了基于面向对象技术的对舰船综合电力系统电力网络的拓扑建模。并针对电网故障的随机性特点,在面向对象环境中实现了对随机故障的模拟,同时用深度优先算法进行了快速的拓扑跟踪。算例分析证明了该方法的有效性。 相似文献
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LUShu-ping YANGXue-jing ZHAOXi-ren 《船舶与海洋工程学报》2004,3(1):20-23
As there are lots of non-linear systems in the real engineering, it is very important to do more researches on the modeling and prediction of non-llnear systems. Based on the muhi-resolution analysis (MRA) of wavelet theory, this paper combined the wavelet theory with neural network and established a MRA wavelet network with the scaling function and wavelet function as its neurons. From the analysis in the frequency domain, the results indicated that MRA wavelet network was better than other wavelet networks in the ability of approaching to the signals. An essential research was carried out on modeling and prediction with MRA wavelet network in the non-linear system. Using the lengthwise sway data received from the experiment of ship model, a model of offline prediction was estab lished and was applied to the short-time prediction of ship motion. The simulation results indicated that the forecasting model improved the prediction precision effectively, lengthened the forecasting time and had a better prediction results than that of AR linear model. The research indicates that it is feasible to use the MRA wavelet network in the short -time prediction of ship motion. 相似文献
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Chengjin WangJiaoe Wang 《Research in Transportation Economics》2011,32(1):54-63
Port system is a research focus of transport geography, and most studies believe carriers are important factors in the development and concentration of the port system. Since the 1990s, carriers have played an important role in organizing the global shipping network and reorganizing the port system. But there isn’t a perfect method to evaluate carriers’ influence and the roles of each port in the maritime shipping networks. In this paper, we use the monthly schedule table of international carriers to describe and model the spatial pattern of the global shipping network and identify its hub-and-spoke system. The result shows that a hierarchical structure exists in the global shipping network. The North Hemisphere, especially the East Asia and the Southeast Asia, is a dominant region of the worldwide shipping network. East Asia, Southeast Asia, Northeast Europe, and East coast of the USA are the concentration regions of worldwide shipping lines. The ports of Hong Kong, Singapore, Shenzhen, Shanghai, and Kaohsiung etc have advanced capacity for maritime shipping and high potentials for being hub ports in the global shipping network. Today, the worldwide shipping network is transforming from the multi-port calling system to 44 regional hub-and-spoke systems. Meanwhile, the sub-networks with hub ports of Antwerp, Singapore, and Hong Kong have become the most important ones and dominate the whole global shipping network. 相似文献