公路边坡变形跟踪预测系统开发及应用

公路边坡变形监测预测是评价公路边坡稳定性的一种有效手段,为提高公路边坡变形监测和预测分析的效率,通过监测信息的自动采集和无线传输,实现边坡变形数据的远程实时存储;针对公路边坡变形破坏模式复杂多样的特点,以系统化和信息化为原则,集成了多种常用时间预测模型,建立了边坡变形预测模型库;采用Visual C+〖KG-*3〗+编程技术,将远程实时监测和预测分析功能集成,开发了边坡变形跟踪预测系统,并成功应用于某公路边坡变形安全监测中。     

模块化教学模式下中高职课程衔接研究——以南通航运职业技术学院电气自动化专业为例

文章结合南通航运职业技术学院电气自动化专业启动的中高职衔接改革,提出了构建“提升能力、结合证书、模块化设置”的中高职课程衔接的模式,以实现真正意义上的中高职课程衔接。     

How big data enriches maritime research – a critical review of Automatic Identification System (AIS) data applications

ABSTRACT

The information-rich vessel movement data provided by the Automatic Identification System (AIS) has gained much popularity over the past decade, during which the employment of satellite-based receivers has enabled wide coverage and improved data quality. The application of AIS data has developed from simply navigation-oriented research to now include trade flow estimation, emission accounting, and vessel performance monitoring. The AIS now provides high frequency, real-time positioning and sailing patterns for almost the whole world's commercial fleet, and therefore, in combination with supplementary databases and analyses, AIS data has arguably kickstarted the era of digitisation in the shipping industry. In this study, we conduct a comprehensive review of the literature regarding AIS applications by dividing it into three development stages, namely, basic application, extended application, and advanced application. Each stage contains two to three application fields, and in total we identified seven application fields, including (1) AIS data mining, (2) navigation safety, (3) ship behaviour analysis, (4) environmental evaluation, (5) trade analysis, (6) ship and port performance, and (7) Arctic shipping. We found that the original application of AIS data to navigation safety has, with the improvement of data accessibility, evolved into diverse applications in various directions. Moreover, we summarised the major methodologies in the literature into four categories, these being (1) data processing and mining, (2) index measurement, (3) causality analysis, and (4) operational research. Undoubtedly, the applications of AIS data will be further expanded in the foreseeable future. This will not only provide a more comprehensive understanding of voyage performance and allow researchers to examine shipping market dynamics from the micro level, but also the abundance of AIS data may also open up the rather opaque aspect of how shipping companies release information to external authorities, including the International Maritime Organization, port states, scientists and researchers. It is expected that more multi-disciplinary AIS studies will emerge in the coming years. We believe that this study will shed further light on the future development of AIS studies.     

基于AIS的港口船舶引航系统的研究

根据我国沿海港口的特点及其船舶引航的需求,设计基于AIS的港口船舶引航系统。分析该系统的关键技术,并介绍了系统的结构及功能。经应用表明,系统将引航工作所需的各种信息在电子海图平台上直观综合显示,实现引航员显示终端轻便、无线携带,为引航员提供安全引航的技术保障。该系统特别适合引航工作和引航管理工作的需要,促进了引航调度管理和安全监督的信息化,有效地提高了引航工作的效率,保障船舶引航的安全。     

基于电子海图的船舶绕避台风系统设计与实现

发挥电子海图显示平台优势,引入基于台风预报误差遭遇概率算法,设计了基于电子海图的船舶绕避台风系统,将台风基本数据信息和船舶航行基本信息,如船舶位置、航线以及台风的位置、行进路线等直观地显示在电子海图上,并运用台风预报误差遭遇概率算法,可快速、准确地制定出船舶绕避台风方案。利用此系统可有效、直观显示船舶和台风的相对动态关系,从而制定船舶绕避台风的航速和航线规划,保证船舶在恶劣的台风天气中的航行安全。     

AIS信息采集方式的研究

通过对AIS信息结构的分析,提出了AIS信息的采集方式,设计了AIS信息采集的软、硬件的流程,同时,对AIS信息的传输方式进行了探讨与研究。     

浅谈AIS在航标上的应用

船舶自动识别系统(AIS)是在VHF海上移动频段运行的、采用时分多址联接(TDMA)技术的、自主连续的广播系统,包括船站和岸台基站。AIS系统是诞生于上世纪90年代的一种新型航海设备和助航系统,是先进科学技术在航海领域的应用,它融合了现代通讯、计算机等多门类高科技技术。     

VTS中雷达和AIS信息融合算法探讨

提出VTS中雷达和AIS信息时间统一性的算法,采用K近邻域法和基于统计的加权估计法对雷达和AIS信息进行相关判别和融合,提高了VTS对目标的跟踪性能和可靠性。     

基于电子海图的船舶定线辅助系统软件的实现

以船舶定线研究为目的，开发基于电子海图的交通数据处理与分析的软件，实现海上交通调查数据的计算机处理、交通流模式分析及定线技术的应用。     

AIS的发展及其对航运界的影响

船舶自动识别系统（AIS）自90年代中期由瑞典等国家提出，得到迅速的发展，IMO在1999年通过了《AIS强制安装的决定》，并将于2002年7月1日开始逐步强制在船舶上安装AIS设备，该设备安装以后，对目前航运界的避碰手段，航行警告制度，船位报告制度以及物流等方面将产生巨大而深远的影响。