基于满意度门限检测的多雷达航迹对提取研究

针对多部雷达航迹对提取问题,首先提出了门限法,通过设定多个参数的门限,依据相关准则判断下一时刻的点是否选人该门限内,剔除野点后对单部雷达的观测数据建立航迹。进一步提出航迹在某时间段相交的判别准则,找出了各雷达站观测到的有相交时间段的航迹;对应多个有相交段的航迹,采用了线性插值的方法进行时间配准,让不同雷达表示同一目标位置的时刻集合扩大为一致;在此基础上,按照航迹相关准则抽取了表示同一目标的航迹对。仿真结果验证了算法的有效性。     

选址受限条件下VTS系统雷达站的设计

VTS系统雷达站的选址在地点受限制的情况下对全系统能否充分发挥效能有决定的影响。本文结合黄骅港综合港区新建雷达站工程的实例,有针对性地采用其他信息采集手段,解决狭长航道远端监控盲区的问题,使VTS系统效能最大化,可为其他类似工程设计提供参考。     

非线性多步预测与优化方法在水文预报中的应用

水文预报能够为水资源的保护提供强有力的依据。本文将经验模式分解和动态递归神经网络相结合建立多步预测模型,以此来解决预测数据的非线性、精度低等问题。最后通过对比实验来说明,本文算法能够通过经验模式分解得到不同的模式分量,降低了原始数据之间的耦合性,提高了系统的稳定性。     

卫星探测舰船能力仿真研究

针对多颗卫星联合对舰船目标观测活动中的探测能力问题，研究对其量化描述方式并进行仿真。综合运用运动仿真、概率论、连续马尔科夫链和蒙特卡罗法等方法对卫星探测舰船活动各阶段建立相应的模型，并结合数学函数提出多星联合探测能力量化指标。以某作战想定为背景，进行了仿真计算，得出结论。仿真结果表明该模型能够解决多星联合观测舰船目标问题，并且该研究成果对航天装备效能评估和装备体系发展规划论证具有一定的指导意义。     

谈VTS建设中雷达站的选址

VTS系统中雷达站是最为核心的组成部分之一。雷达站作为雷达的载体和工作场所,其位置的选择对雷达发挥正常性能乃至对全系统能否达到设计要求有决定影响。VTS系统中的雷达站一般均设置于高点,同时又形成雷达站链状网络,一般其最大作用距离都能满足设计要求,而最小作用距离（盲区）问题就凸显出来了。     

我国首例海洋石油平台海事雷达站建设工程

正黄骅港是我国北方主要的煤炭装船港和主要能源输出港之一。近年来,伴随着港口的快速发展,辖区水域船舶航行交织严重,为保障VTS系统功能的充分发挥,沧州海事局启动了河北海事局黄骅港VTS扩建工程。为解决现有煤炭港区雷达站对南排河石油钻井平台水域的监管能力不足的问题,经多方沟通,沧州海事局决定在赵东油田C4区块的PT1海洋平台上建设南排河雷达站。     

TERMA雷达天线系统的检查维修几例

<正>大连VTS系统共有6个雷达站,全部采用TERMA公司的Scanter2001雷达,其中2003年一期项目3个雷达站,2006年二期项目1个雷达站,2007年三期项目2个雷达站。几年来,我们对雷达站一直进行系统的     

VTS保障武汉航区安全

武汉船舶交通管理系统（以下简称武汉VTS）于2007年12月1日正式运行，系统规模为两站一中心，即二桥雷达站、大桥雷达站和武汉VTS中心。武汉VTS中心负责整个系统的运行监控，其管理和服务范围为长江干线武汉白沙洲大桥上界至武汉长江二桥下界之间约16千米水域。本文分析武汉船舶交通管理系统的功能及运用典型案例，提出提高武汉VTS服务水平的相关建议。     

遥测水位校对整理整编初探

针对遥测水位原始数据由于数据量非常大,带来的原始数据正确性检查困难、后期处理不方便问题。提出了将水位数据还原成自己水位过程线,能非常直观、快速检查水位数据是否正常;采用模拟人工摘录的方式,对遥测水位原始数据进行精减的解决方案。经过多个站多年的使用,效果非常好。     

上荆江数字航道水位站观测设施建设主要技术对策

水位站观测设施是上荆江河段数字航道建设的重要内容之一。根据岸坡、河床地质条件的不同,在水位站选址、水尺选型及施工、水准点及观测路施工、压力管线的敷设特别是气容的安装等方面进行研究和优化,提出了有针对性的施工方案。创新性地把直立式和倾斜式水尺相结合,解决特殊地理条件下水位观测的难题。设计制作了不同的气容安装方法,解决不同河床边坡、不同水文环境下探头固定的问题。     

基于无人水面艇感知网的目标船航迹关联与数据融合

针对现有无人水面艇（Unmanned Surface Vehicle，USV）在航行过程中感知周围航行目标时出现的数据源单一、数据延迟、数据丢失等问题，提出一种基于USV搭载的航海雷达和全球定位系统（GPS）数据源的USV海上航行目标感知数据融合方法。基于最小误差法提出雷达原始图像数据解析算法，并采用数据剔除、时间空间统一方法完成对目标数据预处理，构建基于欧氏距离和马氏距离的航迹关联算法模型、基于层次分析法（Analytic Hierarchy Process，AHP）和专家评价法的融合数据权重分配模型。同时，开展USV试验研究，验证整体融合方法。结果表明，目标原始数据预处理方法合理可靠，融合算法稳定可信，可为USV海上航行目标感知、安全航行及快速避碰提供技术和算法支持。     

USV复杂水域环境综合感知技术

从无人水面艇（Unmanned Surface Vessel,USV）所处的工作环境,分析单目摄像头、双目摄像头、海事雷达、激光雷达等传感器的组成原理、优缺点、性能测试。介绍多传感器数据在USV上的融合原理、融合流程及其应用情况。经过实船海上试验,多传感器数据融合指标良好,较好地解决USV在复杂水域安全航行的感知技术问题。所描述的感知技术,对设计和研发搭载不同任务的USV,识别不同工作场景环境,具有积极的参考价值。     

Clustering and performance: the case of maritime clustering in The Netherlands

Over the last years, the concept of clustering has become a central concept for analysing the competitiveness of nations, industries and firms. The cluster concept can be usefully applied to study clustering of maritime activities. Maritime activities, such as shipping, shipbuilding and port and maritime services, are clearly geographically concentrated in a number of maritime clusters. Due to ongoing internationalization in these industries, the concentration of maritime activities in clusters is likely to increase. This observation leads to two important research questions: what are the advantages for firms to locate in clusters and what factors influence the development of maritime clusters? This study identifies four agglomeration economies that attract firms to cluster: a joint labour pool, a broad supplier and customer base, knowledge spillovers, and low transaction costs. Furthermore, it discusses the effects of aspects of the cluster structure, being the presence of internal competition, the heterogeneity of the cluster population, the entry and exit barriers, and the presence of (above mentioned) agglomeration effects. It also briefly discusses the important issue of cluster governance. This overview allows one to develop a theoretical framework to analyse clusters. In the empirical part, this framework is applied to the maritime cluster in The Netherlands. Based on empirical data, from surveys amongst firms in the maritime cluster, studies commissioned by the Dutch maritime Network and regional statistics, the presence of agglomeration economies in the cluster is shown. Secondly, it is shown that the cluster structure is beneficial for the performance. This paper finishes with conclusions and suggestions for further research.     

毫米波雷达与激光雷达在无人船上的应用

从毫米波雷达与激光雷达在无人驾驶汽车及水面自主船舶的应用现状出发,分析其相对于船舶现有感知设备的优缺点。提出基的毫米波雷达与激光雷达在无人船上近距离目标运动态势融合感知方案,并给出具体的数据处理与融合过程。该种组合感知方案能够有效弥补现有无人船感知盲区、提高近距离目标感知精度及自主靠离泊的可靠性。最后指出激光雷达在未来需要降低成本并提高海事可靠性,与视觉传感器的融合将会是更高层次上的研究方向。     

Evaluation of maritime safety policy instruments

This paper analyzes the effectiveness of the current maritime safety policy system as a whole. It offers an overview of different kinds of policy instruments that are used to enhance maritime safety and the criteria for effective policy instruments. It provides a criticism and goes through the weak points of the current maritime safety policy system, and finally, the system is analyzed in the light of the criteria for effective policy. The paper is based on literary sources, mainly on articles published in academic journals. The conclusion of the article is that the development of individual policies will not greatly improve the current level of maritime safety, and more fundamental changes are needed in the governance of maritime safety.     

海上交通巡逻和救助船舶配置规模研究

为适应海上交通安全管理需要,确定巡逻和救助船舶配置规模,根据船舶使用水域和功能定位,将巡逻和救助船舶划分3种类型和7个系列,基于巡逻船雷达基本探测原理和巡逻路径,计算巡逻船有效监管距离和面积,基于海上交通应急到达时间要求和救助路径,计算救助船有效救助距离和面积,根据离岸不同距离水域面积和岸线长度,确定巡逻和救助船舶配置规模,提高巡逻和救助船舶布局规划的科学性。     

Contributions to maritime economics—Zenon S. Zannetos, the theory of oil tankship rates

This paper discusses the importance of Zannetos' 1966 book for the development of maritime economic thought. The main contributions of the book are recounted, and the empirical work in the book is reviewed.

The analysis of the present paper is a citation research on the maritime economics literature that refers to the book. Of the 42 papers in the set, about one-third refers to the book in general. A total of 35 papers refer to one or more elements of the book, with an equal number of references to: (1) the term structure of freight rates; (2) the empirical findings on the form of the supply curve; and (3) on the verification of his results.

The general conclusion of the citation analysis is that, apparently, a number of elements of his work are still very valid for current maritime economics thinking, while maritime economists have disregarded several other elements. The latter seems unjustified for some of the business structure observations that are made in the book, such as the notion that the ship is the firm, and the elasticity of expectations. The former observation is the basis for virtually all empirical work in maritime economics that is based on individual contract data (all freight rate analysis is of this nature), and the second is the basis for the analysis of investment behaviour in shipping, investigations of cyclicality and so on.

Zannetos can definitely be seen as the initiator of the important field of term structure analysis in maritime economics. In addition to this, there are several topics in the 1966 book that are as yet unexplored, and deserve empirical scrutiny.     

舰船雷达与AIS信息融合技术

雷达和自动识别系统(Automatic Identification System,AIS)是配备最多的2类安全助航设备,在海上船舶导航领域发挥着不可替代的作用。由于雷达与AIS提供的信息具有良好的互补性和冗余性,二者融合可以改善探测性能、提高导航系统的精度和可靠性,是近年来海上导航技术的重点发展方向。本文首先介绍雷达/AIS信息融合技术,接着总结其国内外研究现状,并重点阐述航迹关联和信息融合两项关键技术的研究现状,最后提出雷达/AIS信息融合技术发展中待解决的问题,并展望其未来发展趋势。     

雷达辐射源的两种识别算法比较

针对雷达辐射源识别中采用的马氏距离法和改进的格贴近度法两种相似性测量方法进行研究,分析了两种算法的相同和相异点及优劣性.指出了两种算法在雷达辐射源识别中的特点和存在的问题.     

Contributions to maritime economics—Zenon S. Zannetos,the theory of oil tankship rates

This paper discusses the importance of Zannetos’ 1966 book for the development of maritime economic thought. The main contributions of the book are recounted, and the empirical work in the book is reviewed.

The analysis of the present paper is a citation research on the maritime economics literature that refers to the book. Of the 42 papers in the set, about one-third refers to the book in general. A total of 35 papers refer to one or more elements of the book, with an equal number of references to: (1) the term structure of freight rates; (2) the empirical findings on the form of the supply curve; and (3) on the verification of his results.

The general conclusion of the citation analysis is that, apparently, a number of elements of his work are still very valid for current maritime economics thinking, while maritime economists have disregarded several other elements. The latter seems unjustified for some of the business structure observations that are made in the book, such as the notion that the ship is the firm, and the elasticity of expectations. The former observation is the basis for virtually all empirical work in maritime economics that is based on individual contract data (all freight rate analysis is of this nature), and the second is the basis for the analysis of investment behaviour in shipping, investigations of cyclicality and so on.

Zannetos can definitely be seen as the initiator of the important field of term structure analysis in maritime economics. In addition to this, there are several topics in the 1966 book that are as yet unexplored, and deserve empirical scrutiny.