与敌海上编队遭遇战中的通信对抗战术初探

与敌海上编队遭遇战斗中的远程通信干扰技术，是牵涉到海战中我能否有效控制敌信息互通，能否有效地阻断其编队海上指挥与控制的重要作战手段。本文以干扰敌海上编队与其海上指挥所间的地波通信为对抗背景，探讨了我海军通信干扰战术的应用。     

蒸发波导环境下海上超视距通信应用研究

提出不同条件下蒸发波导预测方法:基于水文气象条件的海上舰艇蒸发波导预测模型选择方法和基于GPS信号利用贝叶斯正则化BP神经网络反演蒸发波导的方法;结合舰艇微波频段通信模式及电磁波在蒸发波导环境下的传输损耗,研究蒸发波导环境下海上超视距通信,定量估算出最大有效通信距离,仿真结果表明蒸发波导环境下微波频段通信可达视距范围之外;研究超视距通信电磁盲区分布特征及影响因素;建立蒸发波导环境下舰艇超视距通信模型及应用流程。结合实际海上通信需求,提出蒸发波导环境下舰艇海上超视距通信应用。     

蒸发波导环境下海上超视距通信应用研究

提出不同条件下蒸发波导预测方法:基于水文气象条件的海上舰艇蒸发波导预测模型选择方法和基于GPS信号利用贝叶斯正则化BP神经网络反演蒸发波导的方法;结合舰艇微波频段通信模式及电磁波在蒸发波导环境下的传输损耗,研究蒸发波导环境下海上超视距通信,定量估算出最大有效通信距离,仿真结果表明蒸发波导环境下微波频段通信可达视距范围之外;研究超视距通信电磁盲区分布特征及影响因素;建立蒸发波导环境下舰艇超视距通信模型及应用流程.结合实际海上通信需求,提出蒸发波导环境下舰艇海上超视距通信应用.     

驱护舰编队短波通信干扰战术运用

通过分析通信干扰压制区,明确通信干扰阵位,提出干扰时机要求,为海上编队通信对抗的战术使用提供参考。     

基于领域知识的海上编队线型队形识别

编队队形是达成海上编队战术意图的重要手段,因此识别海上目标的编队队形是判断其作战意图的有效方法之一。本文从系统研究海上编队线型队形的领域特征入手,分析了海上编队线型队形的队列要素及计算方法,进而提出了海上编队线型队形的模板表示方法。在上述基础上,建立了识别队形所需要的坐标变换、队列方位等关键参数计算的数学模型,提出了基于队列方位的队列线聚类算法。最后设计了便于计算机编程实现的详细识别算法步骤,从而构建了基于领域特征的编队队形识别算法。     

预警机引导导弹超视距攻击分析

水面舰艇编队自身雷达引导距离不能保障导弹的最大有效射程，而预警机作用距离可远大于导弹最大有效射程，且探测精度高，因此对预警机引导导弹进行超视距攻击进行分析。应用概率论方法，提出预警机引导导弹攻击概率评估模型，并运用Matlab仿真，对预警机引导导弹超视距攻击的概率进行评估。结果表明，运用预警机可大大提高导弹超视距攻击的概率，有利于水面舰艇编队先敌攻击，提高了水面舰艇编队的生存能力。     

海上编队协同作战若干问题的探析

首先介绍了海上编队协同作战的概念和思想,然后对海上编队协同作战的研究范畴和层次进行了划分,其中重点分析了海上编队传感器协同探测模式,最后对海上编队协同作战的指挥控制体制进行了概括性总结。     

基于灰色层次分析法的海上编队预警探测体系效能分析

为了有效分析海上编队预警探测体系作战效能,根据海上编队预警探测体系及其作战任务特点,建立海上编队预警探测效能分析指标体系,并运用灰色层次分析法,对海上编队预警探测效能进行分析研究,得出了各效能指标对作战效能的影响。     

基于事件触发的船舶编队有限时间控制

为改善船舶编队的时效性，针对船舶编队在海上作业时存在频繁的不必要的通信消耗问题，提出一种基于事件触发机制的有限时间控制策略。设计一个编队扩张状态观测器观测船舶动态信息并补偿船舶模型中的不确定性及外界干扰；针对自身的船舶编队系统定义一个由广义误差变量组成的固定阈值触发函数，将事件触发函数与非线性终端滑模控制器相结合，大大降低了编队控制律的更新频率；利用Lyapunov有限时间理论验证整个编队系统的有限时间稳定性，并证明控制器不存在Zeno行为。仿真结果显示，设计的编队控制器能在5s左右达到预期队形。与连续时间编队控制器相比，设计的编队控制器在保证编队队形的基础上大大降低了触发次数，从而节约了编队系统的通信资源。     

海军高频(HF)通信系统体系结构研究

从我国海军通信发展的现状出发,以现代高频(HF)通信技术的发展为基础,提出了符合未来通信网络体系结构发展方向的我国海军高频通信系统体系结构,并对该体系结构中海上编队通信HF骨干网和岸基HF无线接入系统的主要功能、性能指标及关键设备进行了分析研究。     

The seafaring labour market in Brazil

The most recent reports on the supply and demand for seafarers suggest that there is an increasing lack of officers for the expanding world's merchant fleet. With a focus on Brazil, this paper discusses a particular seafaring labour market highlighting specific challenges that need to be overcome. The paper looks into the current condition of the imbalance in Brazilian seafaring labour market as well as the prospects for merchant marine officers from the only two maritime schools in the country. Key issues on demand forecast and supply expectation, policy amendment, promoting maritime career, sea career commitment and maritime career empowerment are discussed to illustrate possible means to overcome the imbalance.     

The role of the Federal Government in US marine transportation

The United States meets the world shipping crisis of the 1970s with a high-cost merchant fleet and a national maritime policy which needs clearer articulation. This paper examines the objectives, rationale and methods of implementation of the Us maritime programme with attention, finally, to the question of governmental reorganization.     

The role of the Federal Government in US marine transportation

The United States meets the world shipping crisis of the 1970s with a high-cost merchant fleet and a national maritime policy which needs clearer articulation. This paper examines the objectives, rationale and methods of implementation of the Us maritime programme with attention, finally, to the question of governmental reorganization.     

海事声像档案数字化初探

海事声像档案原件数字化，对档案信息的现代化管理、使用和传播等都具有极其重要的作用。文中分析了声像档案数字化的必要性、实现步骤及实现过程中应注意的问题，为相关人员提供参考。     

中国的海事救助系统

该文主要介绍了我国海事救助的规定和海事救助系统,搜救通信手段,通信的发展对搜救的影响,主要法律法规,搜救通信的发展与需求,以及我国海事搜救通信的现状和经验教训。     

Merchant fleet development by legislation: lessons from West and Central Africa

In the late 1960s and early 1970s, several developing maritime nations began to invoke their 'legitimate right' to carry, in their own vessels, cargo generated by their own import and export trades as one way to reverse their underdevelopment and dependency on traditional maritime nations. Consequently, they embarked on the establishment and development of national merchant fleets by means of cargo reservation legislation and flag discrimination practices. West and Central African states have pursued a vigorous policy of merchant fleet development for over two decades. This study examines some of the cargo reservation policies and flag discrimination practices in West and Central Africa and concludes that these two measures alone are insufficient to build up a significant merchant marine. Merchant fleet development depends equally on the resolution of problems such as shortage of ship finance or capital, disruptive bureaucratic politics among the state agencies concerned with shipping, low volume of trade, and contradictory and ambivalent fiscal and macroeconomic policies in these countries that impede the development of the maritime sector.     

编队协同防空系统通信网设计初探

目前编队防空正由平台防空模式向协同防空模式过渡,这对防空系统通信网设计带来了一定的挑战.本文首先分析了美军编队协同防空系统的组成和作战样式,据此分析了其通信网组成及相关参数指标.以美军为借鉴.提出了我军编队协同防空系统的初步设想,并据此提出了防空通信网的技术体制,并就其中涉及到的关键技术进行了相关讨论.     

A decision-making solution to ship flagging out via administrative maritime strategies

The choice of flag is one of the main strategic/critical decisions for shipowners in the initial stage of maritime enterprises. On the other hand, flagging out has a great influence on the prestige and economic benefits for traditional maritime countries. To address this issue, this paper proposes a Multiple Criteria Decision Making (MCDM) approach using a Primarily Strategic Action Plan (PSAP) in a short-run period and a Secondary Strategic Action Plan (SSAP) for a long-term perspective. The case is demonstrated with respect to the flagging out issue in Turkish shipping fleet. It measures the decision-making tendencies of shipowners using Turkish National Shipping Registry (TNSR), Turkish International Shipping Registry (TISR), and Open Registries (ORs) as potential shipping registry alternatives. The model outcomes originally contribute to Turkish maritime policy, especially in terms of strengthening and reinforcing of TNSR procedures.     

Strategic fleet size planning for maritime refrigerated containers

In the present economic climate, it is often the case that profits can only be improved, or for that matter maintained, by improving efficiency and cutting costs. This is particularly notorious in the shipping business, where it has been seen that the competition is getting tougher among carriers, thus alliances and partnerships are resulting for cost effective services in recent years. In this scenario, effective planning methods are important not only for strategic but also operating tasks, covering their entire transportation systems. Container fleet size planning is an important part of the strategy of any shipping line. This paper addresses the problem of fleet size planning for refrigerated containers, to achieve cost-effective services in a competitive maritime shipping market. An analytical model is first discussed to determine the optimal size of an own dry container fleet. Then, this is extended for an own refrigerated container fleet, which is the case when an extremely unbalanced trade represents one of the major investment decisions to be taken by liner operators. Next, a simulation model is developed for fleet sizing in a more practical situation and, by using this, various scenarios are analysed to determine the most convenient composition of refrigerated fleet between own and leased containers for the transpacific cargo trade.