基于BLP模型的摆渡木马防御技术的研究

分析了摆渡木马的工作原理和特点,提出了控制数据从计算机流向移动存储介质的解决方法。根据BLP模型的基本思想,提出了基于BLP模型的摆渡木马防御方案。在该方案中,根据内网或计算机中文件的重要程度,将文件分成不同等级;将用户对文件的访问权限也分成相应的不同等级;当用户对文件进行访问时,通过比较权限等级和文件等级来决定是否能读或写,读或写采用＂下读上写＂的策略。由于把移动存储介质的级别设为最低,所以该方案能有效的防止摆渡木马。     

新长铁路靖江—江阴轮渡极限运能分析

本文通过对新长铁路江阴过江段轮渡的现状以及该区段长江航运情况的分析,总结出了过江轮渡运能的影响因素,分析了既有轮渡的极限运能,并考虑了增加渡轮数量对运能的贡献,为有关部门进行决策提供可靠的依据。     

Non‐cooperative game‐based packet ferry forwarding for sparse mobile wireless networks

In sparse mobile wireless networks, normally, the mobile nodes are carried by people, and the moving activity of nodes always happens in a specific area, which corresponds to some specific community. Between the isolated communities, there is no stable communication link. Therefore, it is difficult to ensure the effective packet transmission among communities, which leads to the higher packet delivery delay and lower successful delivery ratio. Recently, an additional ferry node was introduced to forward packets between the isolated communities. However, most of the existing algorithms are working on how to control the trajectory of only one ferry work in the network. In this paper, we consider multiple ferries working in the network scenario and put our main focus on the optimal packet selection strategy, under the condition of mutual influence between the ferries and the buffer limitation. We introduce a non‐cooperative Bayesian game to achieve the optimal packet selection strategy. By maximizing the individual income of a ferry, we optimize the network performance on packet delivery delay and successful delivery ratio. Simulation results show that our proposed packet selection strategy improves the network performance on packet delivery delay and successful delivery ratio. Copyright © 2013 John Wiley & Sons, Ltd.     

某船动力系统电动化改造方案设计

基于某船排放问题提出4种电动化改造方案,即全电、混合动力（两种方式,即电池满足4个或3个航次能量需求）以及电容方案。结合改造要求,分析各改造方案优劣后可知混合动力方案（3个航次）可行性最高,并讨论其系统电网结构与充电系统的可行方案。通过与传统动力系统方案对比,对其经济性与节能减排优势进行分析,得出节能减排优势较大,但经济性较低,提出平均分摊法电池租赁模式提高其经济性。     

Safety climate and safety behavior in the passenger ferry context

This research empirically evaluates safety climate and safety behavior in the passenger ferry context. Using survey data collected from 155 respondents working for passenger ferry companies in Taiwan, hierarchical regression analysis was used to examine the effects of safety climate on self-reported safety behaviors. Confirmatory factor analysis identified five main dimensions of safety climate as measured on a passenger ferry safety climate scale: safety policy, safety motivation, emergency preparedness, safety training, and safety communication. Further, safety training and emergency preparedness were found to positively affect self-reported safety behaviors with respect to safety compliance and safety participation. The study also revealed positive associations among respondents’ age, ferry capacity, and safety compliance. Implications of the study findings for increasing safety in ferry operations and their contribution to the development of safety management are discussed.     

烟大铁路轮渡栈桥钢梁制造技术

烟大铁路轮渡栈桥是世界第一座双孔联动的下承式板梁结构，该栈桥不是简单的桥的概念，而是一部大型的机器。文章介绍了烟大铁路轮渡栈桥钢梁制造过程中的关键技术。     

直流配网型混合动力系统在车客渡船上的应用

针对车客渡船动力负荷切换频繁,传统柴油机推进油耗高、排放和噪声大的问题,提出一种基于变速发电机组和超级电容储能装置的直流配网型混合动力系统。目前系统已成功应用于“江苏路渡3011”轮,实船运行数据显示:该混合动力系统不仅能达到较好的节油效果、降低排放,更在操控性、舒适性上优于传统的柴油机推进模式。     

渡河问题的矩阵表示与迭代算法

为解决较复杂的渡河问题,提出用构建岸态矩阵来表示求解过程中左右河岸上同一时刻的人员组合状态;并引入表征小船上人员状况的摆渡算子,则问题的求解过程就可用从始点状态向着目标状态的逐次迭代来表示;而约束条件则由岸态矩阵的生成及算子的选取来实现。同时对运载能力n的取值范围作了较深入的讨论,并用图解算例加以验证。     

浙江玉环—乐清滚装轮渡码头钢吊桥及起吊设备设计

玉环—乐清滚装轮渡码头钢吊桥是目前浙江省跨度最大的轮渡钢引桥,工作环境为沿海作业,设计中涉及到台风、海浪、盐雾等诸多因素.今通过施工实例就该钢吊桥及起吊设备在设计上的一些主要问题作了简要介绍.